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ENSTROM F-28F Series Supplement Manual

Avionics systems maintenance
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Download this manual See also: Maintenance Manual, Operator's Manual
ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL
SUPPLEMENT 1
AVIONIC SYSTEMS
For FAA approval, the Airworthiness Limitations Section is FAA approved and specifies
inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the
Federal Aviation Regulations unless an alternative program has been FAA approved.
For EASA approval, the Airworthiness Limitations Section is approved and variations
must also be approved.
Copyright 2008-2018 by
The Enstrom Helicopter Corporation
2209 22
nd
Street
Menominee, Michigan 49858-3515
Telephone: 906-863-1200
Fax: 906-863-6821
UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED
Rev. 8
i
Jan 15/19
Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

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  • Page 1 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 AVIONIC SYSTEMS For FAA approval, the Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 2 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 3 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Nov 11/11 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 3: Recommended Change Report

    This maintenance manual is prepared and distributed by The Enstrom Helicopter Corporation and is intended for use by personnel responsible for maintaining Enstrom F-28F, 280F, and 280FX helicopters. This manual is periodically revised. If, in the opinion of the user, any information has been omitted or requires clarification, please direct your comments to Enstrom via this form (duplicate) or other similar form.
  • Page 4 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 4 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Jan 9/14 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 5: Record Of Revisions

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 RECORD OF REVISIONS ISSUE DATE REV NO. ISSUE DATE DATE INSERTED DATE INSERTED Nov 21/08 Nov 21/08 Dec 8/08 Dec 8/08 Nov 11/11 Nov 11/11 Jan 9/14 Jan 9/14 Apr 15/15 Apr 15/15...
  • Page 6 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 8 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Jan 15/19 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 7: Table Of Contents

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 TABLE OF CONTENTS Chapter Description Page Cover Page ..................i Recommended Change Report ............iii Record of Revisions ................v Table of Contents ................vii Effective Page List ................ix Introduction Avionic System(s) Effectivity ..........INTRO-1 Aircraft Effectivity ..............

  • Page 8: Table Of Contents

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 TABLE OF CONTENTS Chapter Description Page Chapter 4 Garmin GDL 69/69A XM Satellite Weather/Radio System Description ................. 4-1 Airworthiness Limitations ..............4-2 Servicing ..................4-3 Troubleshooting ................4-3 Periodic Inspections..............4-3 System Maintenance ............... 4-4 Electrical Diagram ................
  • Page 9 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 TABLE OF CONTENTS Chapter Description Page Chapter 10 GNC 255A Nav/Com System Description ............... 10-1 Airworthiness Limitations ............... 10-2 Servicing, Troubleshooting, and Periodic Inspections ....10-3 System Maintenance ..............10-4 Figures and Electrical Diagrams ........... 10-5...
  • Page 10 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 8 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Jan 15/19 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 11: Nov 11/11 Nov

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 EFFECTIVE PAGE LIST Page Date Page Date Jan 15/19 Dec 8/08 Nov 11/11 Dec 8/08 Jan 9/14 Dec 8/08 Jan 9/14 Nov 11/11 Jan 15/19 Nov 11/11 Nov 11/11 Jan 15/19 Aug 28/17...
  • Page 12 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 EFFECTIVE PAGE LIST Page Date Page Date Jan 15/19 12-3 Jan 15/19 Aug 28/17 12-4 Jan 15/19 Jan 15/19 12-5 Jan 15/19 8-10 Jan 15/19 12-6 Jan 15/19 8-11 Jan 15/19 12-7 Jan 15/19...

  • Page 13: Introduction

    Aircraft Effectivity A. The data presented in this F-28F/280F Series Maintenance Manual Supplement is applicable to all Enstrom F-28F and 280F series model helicopters. Supplemental Changes and Revisions A. Subsequent to the publication of the initial issue of this supplement, changes in the avionics equipment, support concepts and procedures, as well as information developed by experience may affect the contents of this supplement.

  • Page 14: Service Document Publications

    Directive Bulletins are also located under the Tech Publications section of the website. Enstrom distributes maintenance manual reissues and revisions in hardcopy form via mail to owners and operators who are registered with Enstrom. Notice of recently released Service Information Letters and Service Directive Bulletins is provided via a postcard mailing.

  • Page 15: Application Of Warnings, Cautions, And Notes

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Application of Warnings, Cautions, and Notes A. Throughout this supplement, it is necessary to highlight or emphasize important points to avoid injury to personnel, damage to equipment, or unnecessary confusion while performing maintenance procedures. The terms “WARNING,” “CAUTION,” and “NOTE” are used to draw attention to instructions or information deserving special consideration.
  • Page 16 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 7 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED INTRO-4 Aug 28/17 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 17: Sl30 Nav/Com

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 1 SL30 NAV COM SECTION 1 SYSTEM DESCRIPTION 1-1. System Description A. The SL30 NAV/COM unit is a VHF Navigation/Communications Transceiver utilizing high performance Digital Signal Processing (DSP) filtering. It includes a 760- channel VHF Com transceiver and a 200-channel VOR/LOC/GS navigation receiver.

  • Page 18: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations A. The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.

  • Page 19: Servicing

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing A. The SL30 contains no user serviceable components or assemblies. Operations involving the removal of the SL30 or any other line-replaceable unit (LRU) installed as a part of the SL30 must be done by authorized maintenance technicians.

  • Page 20: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on the Basic Weight and Balance Record, as required (reference Enstrom F- 28F/280F Series Maintenance Manual).
  • Page 21 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-2. Wiring Harnesses/Connectors – SL30 4-2-1. Removal – Wiring Harnesses/Connectors – SL30 CAUTION Before removing or adjusting any electrical component, ensure all electrical power is off and the battery is disconnected. A. Refer to Diagram 1-1 for the SL30 wiring interface.
  • Page 22 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Nov 18/08 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 23 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 1-1. SL30, Sheet 1 of 1 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Nov 18/08 1-7/1-8 (Blank) Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 24 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 25: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 2 SANDIA SAE5-35 ALTITUDE DATA SYSTEM SECTION 1 SYSTEM DESCRIPTION 1-1. System Description A. The Sandia SAE5-35 is a solid state altitude data system (blind encoder) that converts pressure altitude into a digital output. The data output is referenced to 29.92 in Hg (1013 Millibars).

  • Page 26: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations A. The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 27 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing A. The Sandia SAE5-35 contains no user serviceable components or assemblies. Operations involving the removal of the Sandia SAE5-35 or any other line-replaceable unit (LRU) installed as a part of the Sandia SAE5-35 must be done by authorized maintenance technicians.

  • Page 28: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on Form F-511-5, Basic Weight and Balance Record, as required (reference Enstrom F-28F/280F Series Maintenance Manual).
  • Page 29 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-2. Wiring Harnesses/Connectors – Sandia SAE5-35 4-2-1. Removal – Wiring Harnesses/Connectors – Sandia SAE5-35 CAUTION Before removing or adjusting any electrical component, ensure all electrical power is off and the battery is disconnected.
  • Page 30 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK Rev. 1 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Nov 21/08 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 31 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 2-1. Sandia SAE5-35, Sheet 1 of 1 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 1, Nov 21/08 2-7/2-8 (Blank) Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 32 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 33: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 3 GNS 430W/530W GPS/WAAS NAVIGATOR SECTION 1 SYSTEM DESCRIPTION 1-1. System Description A. The 430W/530W GPS/WAAS Navigator is a panel-mounted product that contains a GPS/WAAS receiver for GPS approved primary navigation under TSO C146a, and also VHF Com and VHF Nav radios in an integrated system unit with a moving map and color display.

  • Page 34: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations A. The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.

  • Page 35: Servicing

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, CLEANING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing A. The 430W/530W contains no user serviceable components or assemblies. Operations involving the removal of the 430W/530W or any other line-replaceable unit (LRU) installed as a part of the 430W/530W must be done by authorized maintenance technicians.
  • Page 36 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 3-4.1. Periodic Maintenance Inspections – Display Backlight A. The display backlight lamp is rated by the manufacturer as having a usable life of 20,000 hours. This life may be more or less than the rated time depending on operating conditions of the 430W/530W, the backlight lamp may dim and the display may not perform as well in direct sunlight conditions.

  • Page 37: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on Form F-511-5, Basic Weight and Balance Record, as required (reference Enstrom F-28F/280F Series Maintenance Manual).
  • Page 38 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-2. Wiring Harnesses/Connectors – GNS 430W/530W 4-2-1. Removal – Wiring Harnesses/Connectors – GNS 430W/530W CAUTION Before removing or adjusting any electrical component, ensure all electrical power is off and the battery is disconnected.
  • Page 39 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Diagram 3-1. GNS 430W/530W, Sheet 1 of 1 Rev. 2, Dec 8/08 3-7/3-8 (Blank) Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 40 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 41: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 4 GDL 69/69A XM SATELLITE WEATHER/RADIO SECTION 1 SYSTEM DESCRIPTION 1-1. System Description A. The GDL 69/69A unit is a remote datalink receiver that delivers XM WX Satellite Weather™ to a Garmin navigation system such as the GNS 430W/530W.

  • Page 42: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations A. The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 43 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing A. The GDL 69/69A contains no user serviceable components or assemblies. Operations involving the removal of the GDL 69/69A or any other line-replaceable unit (LRU) installed as a part of the GDL 69/69A must be done by authorized maintenance technicians.

  • Page 44: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on Form F-511-5, Basic Weight and Balance Record, as required (reference Enstrom F-28F/280F Series Maintenance Manual).
  • Page 45 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 D. Verify the GDL 69/69A operation by viewing the XM Satellite information on the GNS 430W/530W or applicable display unit, or by checking the XM Information or XM Status page on the GNS 430W/530W or applicable display unit.
  • Page 46 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-2-4. Installation – Wiring Harnesses/Connectors – GDL 69/69A A. Refer to Diagram 4-1 for the GDL 69/69A wiring interface. B. Install the electrical component and secure with attaching hardware, clamps, or cable ties.
  • Page 47 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 4-1. GDL 69/69A, Sheet 1 of 1 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 2, Dec 8/08 4-7/4-8 (Blank) Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 48 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 49: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 5 ATTITUDE INDICATOR AND DIRECTIONAL GYRO SECTION 1 SYSTEM DESCRIPTION 1-1. System Description A. The Attitude Indicator Installation, P/N 28-22062-( ), provides an indication of the aircraft’s attitude relative to the earth by means of an electrically powered gyroscope. The unit is mounted in the instrument panel.

  • Page 50: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations A. The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 51 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing A. The attitude indicator and directional gyro installations contain no user serviceable components or assemblies. Operations involving the removal of either of the gyros must be done by authorized maintenance technicians.

  • Page 52: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on Form F-165A, Basic Weight and Balance Record,...
  • Page 53 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-1-4. Installation CAUTION The attitude indicator and directional gyro are delicate electro- mechanical instruments, which must be handled with care. Rough handling can result in damage to the instrument and reduce performance and life of the instrument.
  • Page 54 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-2. Wiring Harnesses/Connectors A. Inspect the plugs, connectors and receptacles for security, contact corrosion, damaged contacts, broken wires, faulty contacts, insert cracks, and faulty insulation. B. Inspect the leads and wiring for loose terminals, chafing, corrosion or deteriorated condition, faulty or damaged insulation, excessive mechanical stress, broken strands, damaged shielding, shorted shielding, routing and mounting conditions.
  • Page 55 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 5-1. Attitude Indicator and Directional Gyro Installations Part Number Component Quantity Item 28-22062-101 Attitude Indicator Installation (Castleberry Instruments & Avionics) 28-22062-5 Attitude Indicator Installation (RC Allen / Kelly Manufacturing) 28-22062-7 Directional Gyro Installation...
  • Page 56 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 5-1. Attitude Indicator and Directional Gyro Wiring Schematics UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 3 Nov 11/11 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 57: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 6 KX 165A NAV/COM SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The KX 165A is a VHF NAV/COM transceiver. The KX 165A NAV/COM installation, P/N 28-22063-( ), includes the KX 165A NAV/COM unit, COM and NAV antennas, and the wiring interface to a VOR/LOC/GS indicator and an audio panel or VOX ICS.

  • Page 58: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 59 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing The KX 165A NAV/COM installation contains no user serviceable components or assemblies. Operations involving the removal of the KX 165A unit must be done by authorized maintenance technicians.

  • Page 60: System Maintenance

    F-28F/280F Series Maintenance Manual). 4-1. KX 165A NAV/COM NOTES All work must be accomplished in accordance with the Enstrom F- 28F/280F Series Maintenance Manual. See Figure 6-2 of this supplement for the KX 165A location in the instrument panel. 4-1-1. Removal Turn the KX 165A unit and aircraft power off.
  • Page 61 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Remove the cable tie or other similar device from the COM/NAV circuit breaker stem and push the stem in to set the circuit breaker. 4-2. Wiring Harnesses/Connectors 4-2-1. Removal – Wiring Harnesses/Connectors CAUTION Before removing or adjusting any electrical component, ensure all electrical power is off and the battery is disconnected.
  • Page 62 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-3. Figures and Diagrams The KX 165A NAV/COM system installation is shown in Figure 6-1. The parts are listed in Figure 6-2. The configuration wiring interface is shown in Diagram 6-1. Figure 6-1. KX 165A NAV/COM System Installation UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev.

  • Page 63: Rev. 4

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Item Part Number Component Quantity 28-22063-1 KX 165A NAV/COM Installation (760 channel) 28-22063-3 KX 165A NAV/COM Installation (2280 channel) 069-01033-0101 . KX 165A (25 kHz increments) 069-01033-0201 . KX 165A (8.33 kHz increments) 050-03378-0000 .
  • Page 64 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 4 Jan 9/14 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 65 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 6-1. KX 165A UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 4, Jan 9/14 6-9/6-10 (Blank) Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 66 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 67: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 7 GTX 330 TRANSPONDER WITH ADS-B OUT SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The GTX 330 with ADS-B Out is installed as part number 28-22028-1. The components of the GTX 330 installation include the panel-mounted GTX 330 unit and a bottom- mounted antenna.

  • Page 68: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.

  • Page 69: Servicing, Troubleshooting, And Periodic Inspections

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS NOTE Portions of Section 3 originate from Garmin Manual, 190-00734-11, GTX 330/33 with ADS-B Out System Maintenance Manual. (Copyright 2015 Garmin Ltd or its Subsidiaries. All Rights Reserved.) 3-1.
  • Page 70 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Table 7-3. GTX 330 Transponder Failure/Fault Messages Failure Message Cause Corrective Action Transponder FAIL The internal transmit or squitter Return the unit to Garmin. message monitors have detected a failure. THE GTX 330 has failed the...

  • Page 71: System Maintenance

    2015 Garmin Ltd or its Subsidiaries. All Rights Reserved.) 4-1. GTX 330 NOTE All work must be accomplished in accordance with the Enstrom F-28F/280F Series Maintenance Manual. NOTE Replacement of the GPS position source requires that the GTX 330 be tested and shown to comply with 14 CFR Part 91.225 and 91.227.
  • Page 72 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 4-1-3. Installation NOTE Do not use excessive force when inserting the GTX 330 into the rack. This may damage the connectors, unit, and/or unit rack. Slide the GTX 330 in the rack straight in until it stops.
  • Page 73 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Turn the power off to exit the configuration pages. Then turn on again (without holding the FUNC key) for normal operation. Configure Audio Mode Configuration Page with the following parameters: Audio Mode Configuration Page  Notes   ...
  • Page 74 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Configure Contrast Configuration Page with the following parameters: CONTRAST Configuration Page  Notes    Adjust Contrast per customer requirement  CONTRAST MODE   AUTO    50  Configure VFR Key Configuration Page with the following parameters: VFR KEY Configuration Page  Notes      ENABLE VFR KEY    10) Configure ARINC 429 Configuration Page with the following parameters: ARINC 429 Configuration Page ...
  • Page 75 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 13) Configure Temperature Page with the following parameters: TEMPERATURE Page  Notes  TEMPERATURE    °C SENSOR INSTALLED      UNITS 14) Configure Mode S Address Entry Pages with the following parameters: MODE S ADDRESS ENTRY PAGES  Notes  Enter US tail # and/or Hex adddress per customer  ADDRESS   US  TAIL#   NXXXXX  requirement.  US TAIL# is typical in the U.S.  ...
  • Page 76 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 20) Configure EHS Page with the following parameters: EHS PAGE  Notes  DISABLE EHS           4-1-6. GTX Test – Regulatory Test Perform the following required regulatory tests every 24 calendar months, or any time the transponder is removed or replaced.
  • Page 77 4-1-8. Software Update Verify the software version number matches the approved software version listed in Enstrom Rotorcraft Flight Manual Supplement 28-AC-070. The software version will appear on the start up screen after power up. If the replaced unit does not have the approved version of software installed, software can be downloaded from the Garmin Dealer Resource Center at www.flyGarmin.com.
  • Page 78 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 VIEW A Item Part Number Component Quantity 28-22028-1 GTX 330 ES Mode S Installation 010-00230-61 . GTX 330 ES Mode S Transponder MS26574-5 . Circuit Breaker 28-19064-1 . Placard 28-22183-127 Antenna Installation AV-22 .
  • Page 79 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 7-1. GTX 330 with ADS-B Out (Ref. 28-19071 Rev. F) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 5, Apr 15/15 7-13/7-14 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 80 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 81 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 7-2. GTX 330 with ADS-B Out – A-30 Altitude Digitizer Interface (Ref. 28-19076-1 Rev. B) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 5, Apr 15/15 7-15/7-16 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 82 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 83 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 7-3. GTX 330 with ADS-B Out – AA83-001 Stereo ICS Interface (Ref. 28-19070-101 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 5, Apr 15/15 7-17/7-18 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 84 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 85: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 8 GTN 650 GPS/NAV/COM SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The GTN 650 installation part number is 28-22112-3. The components of the GTN 650 installation include: GTN 650 unit installed in the radio console...

  • Page 86: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Table 8-1. Vendor Manuals Component Publication Vendor GTN 650 GTN 625/635/650 Installation Manual, Garmin International, Inc. Document No 190-01004-02, latest revision 1200 East 151 Street Olathe, KS 66062 GTN 625/635/650 Pilot’s Guide, Document Tele: (913) 397-8200 No.
  • Page 87 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing The GTN 650 installation contains no user serviceable components or assemblies. Operations involving the removal of the GTN 650 must be done by authorized maintenance technicians.

  • Page 88: System Maintenance

    Basic Weight and Balance Record, as required. 4-1. GTN 650 NOTE All work must be accomplished in accordance with the Enstrom F-28F/280F Series Maintenance Manual. 4-1-1. Cleaning The GTN displays use a lens coated with a special anti-reflective coating that is very sensitive to skin oils, waxes, and abrasive cleaners.
  • Page 89 4-1-5. Software Update Verify the software version number matches the approved software version listed in Enstrom Rotorcraft Flight Manual Supplement 28-AC-069. The software version will appear on the start-up screen after power up. If the replaced unit does not have the approved version of software installed, software can be downloaded from the Garmin Dealer Resource Center at www.flyGarmin.com.
  • Page 90 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 8-1. GTN 650 Installation UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 8 Jan 15/19 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 91 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 8-1. GTN 650 Installation Item Part Number Description Quantity 28-22112-1 GTN 650 Installation (S/S by 28-22112-3) 28-22112-3 GTN 650 Installation 010-00813-A0 GTN 650 Kit 011-02256-00 . GTN 650 011-00979-03 . Configuration Module Kit 010-01157-41 .
  • Page 92 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7 Aug 28/17 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 93 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 ARINC 429 Configuration Page  Main Indicator (Analog) Configuration page  Traffic Configuration Page  N/A (Not applicable at this time)  Speed  Data  Calibrate OBS Resolver  Calibrate (Note 1)    ARINC 429 In 1  ‐‐‐  OFF  CDI Key  Enabled  Main System Configuration Page  ARINC 429 In 2  ‐‐‐  OFF  Selected Course For GPS  Allowed  Airframe Type  Rotorcraft  ARINC 429 Out 1  ‐‐‐  OFF  Selected Course For VOR/LOC  Allowed  Air/Ground Threshold  10KT  ARINC 429 Out 2  ‐‐‐  OFF  V‐Flag State ...
  • Page 94 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 95 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Discrete Configuration Page  System ‐ Alerts (Note 1)  Arrival  Active  N/A (No action taken)  Proximity  3.0 NM  Airspace Alerts  All Active  Waypoint Configuration Page  Altitude Buffer  200 FT  Mark on Target  Disabled  Notes:  1) These settings can be modified per customer requirements unless  noted otherwise   Terrain Configuration Page  Not applicable at this time  System ‐ Units (Note 1)  Nav Angle  Magnetic (°)  Temperature  Celsius (°)  Com Transmit Power Configuration Page  Fuel  Gallons (GAL)  Com Transmit Power  Position Format  LAT/LON  Normal  16W  Notes: ...
  • Page 96 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 97 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Group 1 Configuration Page  Notes  left  right window  EXAMPLE:  window  K‐FACTOR* OF 41.6  XXXX  4  160  L =  LEFT K‐FACTOR  Enter K‐FACTOR  (*The K‐FACTOR value entered should match the K‐ FACTOR identified on the fuel flow transducer.)  R =  0  RIGHT K‐FACTOR  N/A  A =  0  LEFT FUEL FLOW OFFSET  N/A  b =  0  RIGHT FUEL FLOW OFFSET  N/A  U =  0  FUEL UNITS  0 = GALLONS  E =  0 ...
  • Page 98 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 99 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 8-4. GTN 650 Configuration Set-Up, Main SW V6.41 (Ref. 28-19079-9 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 1 of 2) Rev. 8 ,Jan 15/19 8-15/8-16 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 100 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 101 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 8-4. GTN 650 Configuration Set-Up, Main SW V6.41 (Ref. 28-19079-9 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 2 of 2) Rev. 8 ,Jan 15/19 8-17/8-18 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 102 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 103 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 8-1. GTN 650 Interface (Ref. 28-19079-9 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 1 of 2) Rev. 8, Jan 15/19 8-19/8-20 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 104 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 105 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 8-1. GTN 650 Interface (Ref. 28-19079-9 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 2 of 2) Rev. 8, Jan 15/19 8-21/8-22 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 106 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 107 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 8-2. GTN 650 – Fuel Management System Interface (Ref. 28-19078-1 Rev. A) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 8, Jan 15/19 8-23/8-24 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 108 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 109: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 9 DUAL START COLLECTIVE CONTROL INSTALLATION SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The collective control with dual start installation option is part number 28-16080-101. dual start feature allows the rotorcraft to be started from either the pilot or copilot positions.

  • Page 110: System Maintenance

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 4 SYSTEM MAINTENANCE NOTE Removal or installation of equipment will change the aircraft empty weight and empty weight c.g. These changes will be recorded on Form F-511-5, Basic Weight and Balance Record, as required (reference Enstrom F-28F/280F Series Maintenance Manual).
  • Page 111 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Item Part Number Description Quantity 28-16080-101 Collective Control Installation 28-16039-5 . Starboard (Copilot) Collective Stick Assembly (chrome plated finish) 28-16039-7 . Starboard (Copilot) Collective Stick Assembly (flat black finish) 28-16029-3 . Socket/Bellcrank Assembly 28-16011-1 .
  • Page 112 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 9-1. Dual Start Switch Interface UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 5 Apr 15/15 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 113: System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 10 GNC 255A SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The GNC 255A is a VHF communications transceiver combined with 200-channel VOR, LOC, and GS navigation receivers. The com radio operates from 118.000 to 139.975 MHz in either 25 kHz or 8.33 kHz channel spacing.

  • Page 114: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations The Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 115 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing The GNC 255A installation contains no user serviceable components or assemblies. Operations involving the removal of the GNC 255A must be done by authorized maintenance technicians.

  • Page 116: System Maintenance

    Basic Weight and Balance Record, as required. 4-1. GNC 255A NOTE All work must be accomplished in accordance with the Enstrom F-28F/280F Series Maintenance Manual. 4-1-1. Cleaning The front bezel, keypad, and display can be cleaned with a microfiber cloth or with a soft cotton cloth dampened with clean water.

  • Page 117: Electrical Diagram

    4-1-5. Software Update Verify the software version number matches the approved software version listed in Enstrom Rotorcraft Flight Manual Supplement 28-AC-074. The software version will appear on the start up screen after power up. If the replaced unit does not have the approved version of software installed, software can be downloaded from the Garmin Dealer Resource Center at www.flyGarmin.com.
  • Page 118 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 10-1. GNC 255A Installation UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7 10-6 Aug 28/17 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 119 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 10-1. GNC 255A Installation Item Part Number Description Quantity 28-22063-5 GNC 255A Installation 010-01025-50 . GNC 255A Kit 011-02806-00 . . GNC 255A 006-D3844-00 . . Frequency Data Worldwide MS26574-2 . Circuit Breaker (2 amp) MS26574-5 .
  • Page 120 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 INTENTIONALLY LEFT BLANK UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7 10-8 Aug 28/17 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 121 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 10-2. GNC 255 Configuration Set-Up (Ref. 28-19069-103 Rev. C) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7, Aug 28/17 10-9/10-10 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 122 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 123 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 10-1. GNC 255A (Ref. 28-19069-103 Rev. C) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7, Aug 28/17 10-11/10-12 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 124 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 125: Chapter 11 Md200 Series Cdi System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 11 MD200 SERIES CDI SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The Mid-Continent MD200-706 Course Deviation Indicator is designed to operate with VHF and GPS navigational equipment to provide OMNI (VOR), GPS, localizer (VLOC), and glideslope (GS) information.
  • Page 126 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing The MD200 Series CDI installation contains no user serviceable components or assemblies. Operations involving the removal of the MD200 Series CDI must be done by authorized maintenance technicians.
  • Page 127 Basic Weight and Balance Record, as required. 4-1. MD200 Series CDI NOTE All work must be accomplished in accordance with the Enstrom F-28F/280F Series Maintenance Manual. 4-1-1. Removal Remove the MD200 Series CDI in accordance with paragraph 7-18, A, steps 1 through 4 of the F-28F/280F Series Maintenance Manual.
  • Page 128 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Item Part Number Description Quantity MD200-306 . Indicator MD200-706 . Indicator AN515B6R14 . . Screw MS35214-30 . . Screw (alternate) Figure 11-1. MD200 Series Installation UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7...
  • Page 129 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 11-1. GTN 650 – MD200-306 Interface (Ref. 28-19067-107 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7, Aug 28/17 11-5/11-6 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 130 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 131 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 11-2. GNC 255A – MD200-706 Interface (Ref. 28-19067-109 Rev. E) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 7, Aug 28/17 11-7/11-8 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 132 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 133 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 11-3. GTN 650 – MD200-706 Interface (Ref. 28-19067-109 Rev. E) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 8, Jan 15/19 11-9/11-10 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 134 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

  • Page 135: Chapter 12 Gma 350Hc Audio Panel System Description

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 12 GMA 350Hc AUDIO PANEL SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The Garmin GMA 350Hc is a horizontally oriented panel-mounted audio controller that collects, processes, and distributes audio signals between avionics, crew, and passengers.

  • Page 136: Airworthiness Limitations

    ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations For FAA approval, this Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 137 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 3 SERVICING, TROUBLESHOOTING, AND PERIODIC INSPECTIONS 3-1. Servicing The GMA 350Hc audio panel installation contains no user serviceable components or assemblies. Operations involving the removal of the audio panel must be done by authorized maintenance technicians.

  • Page 138: System Maintenance

    Basic Weight and Balance Record, as required. 4-1. GMA 350Hc Audio Panel NOTE All work must be accomplished in accordance with the Enstrom F- 28F/280F Series Maintenance Manual. 4-1-1. Removal Remove power to the GMA 350Hc audio panel unit. Unlock the unit from the rack using the appropriate size hex wrench.
  • Page 139 Software Update Verify the software version number matches the approved software version listed in Enstrom Rotorcraft Flight Manual Supplement 28-AC-080. The software version information is available via the configuration tool (Table 12-2) or the GTN navigator system status page for interfaced equipment. If the replaced unit does not have the approved version of software installed, software can be downloaded from the Garmin Dealer Resource Center at www.flyGarmin.com.
  • Page 140 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Item Part Number Component Quantity 28-22048-5 GMA 350Hc Audio Panel Installation with Marker Beacon Receiver 011-02385-50 . GMA 350Hc 011-02302-00 . Connector Kit (Included with GMA 350Hc) 7101SYZQE . Switch (Used with 4220672-109) 8121SYZGE .
  • Page 141 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 12-3. GMA 350Hc Configuration (Ref. 28-19090-13 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 1 of 2) Rev. 8, Jan 15/19 12-7 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 142 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 12-3. GMA 350Hc Configuration (Ref. 28-19090-13 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 2 of 2) Rev. 8, Jan 15/19 12-8 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 143 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 12-1. GMA 350Hc Interface (Ref. 28-19090-13 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 1 of 2) Rev. 8, Jan 15/19 12-9/12-10 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 144 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 145 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 12-1. GMA 350Hc Interface (Ref. 28-19090-13 Rev. D) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED (Sheet 2 of 2) Rev. 8, Jan 15/19 12-11/12-12 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 146 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 147 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 CHAPTER 13 GTX 345 ADS-B TRANSPONDER SECTION 1 SYSTEM DESCRIPTION 1-1. System Description The GTX 345 ADS-B Transponder is installed as part number 28-22028-3. The components of the GTX 345 installation include the GTX 345 unit installed in the avionics console, altitude encoder, and a bottom-mounted antenna.
  • Page 148 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 SECTION 2 AIRWORTHINESS LIMITATIONS 2-1. Airworthiness Limitations For FAA approval, this Airworthiness Limitations Section is FAA approved and specifies inspections and other maintenance required under 14 CFR §§ 43.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.
  • Page 149 Basic Weight and Balance Record, as required. 4-1. GTX 345 NOTE All work must be accomplished in accordance with the Enstrom F- 28/280F Series Maintenance Manual. NOTE Replacement of the GPS position source requires that the GTX 345 be tested and shown to comply with 14 CFR Part 91.225 and 91.227.
  • Page 150 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Count the number of complete revolutions the hex screw can be turned, not exceeding 8 in-lb of torque. Be careful not overtighten. Three turns is the minimum for proper installation. If fewer than three turns are possible, ensure there are no obstructions to the unit fully seating in the rack.
  • Page 151 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Verify the software version number matches the approved software version listed in the Enstrom Rotorcraft Flight Manual 28-AC-081. Refer to GTX 345 Part 27 AML Maintenance Manual, Document No. 190-00734-21, Section 7.1 for the software version check and Section 7.2 for software update instructions.
  • Page 152 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Item Part Number Component Quantity 28-22028-3 GTX 345 Installation 010-01216-01 GTX 345 Kit 011-03302-00 . GTX 345 unit 7277-5-3 (3 amp) . Circuit Breaker 28-22183-129 Antenna Installation AV-74 . Antenna . . Split Washer #8-32 .
  • Page 153 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Figure 13-3. GTX 345 Configuration (Ref. 28-19071-103 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 8, Jan 15/19 13-7/13-8 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 154 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 155 ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1 Diagram 13-1. GTX 345 Interface (Ref. 28-19071-103 Rev. G) UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Rev. 8, Jan 15/19 13-9/13-10 Blank Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.
  • Page 156 UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates.

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