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HR Smith 503 Series Installation Manual

Emergency locator transmitter
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Commercial In Confidence
INSTALLATION MANUAL
FOR
EMERGENCY LOCATOR TRANSMITTER
TYPE 503 SERIES
Issue 42 - 08.08.24
CN 22332
HRS1012-04-02

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Summary of Contents for HR Smith 503 Series

  • Page 1 Commercial In Confidence INSTALLATION MANUAL EMERGENCY LOCATOR TRANSMITTER TYPE 503 SERIES Issue 42 - 08.08.24 CN 22332 HRS1012-04-02...
  • Page 3 Commercial In Confidence Preface This manual is a controlled document, and as such is subject to amendment. It is in the interest of the user to register this manual with Techtest Limited to ensure receipt of any amendments. Amendments subsequent to the Initial Issue will bear the number of the amendment with which it was issued.
  • Page 4 Commercial In Confidence AMENDMENT AUTHORISATION SHEET Checked by: ……………………………………....... Mechanical Engineering Checked by: ……………………………………....... Electrical Engineering Checked by: ……………………………………....... Commercial Issue 42 - 08.08.24 - CN 22332 HRS1012-04-02...
  • Page 5 Commercial In Confidence Amendments Record Issue number Changed by Date/ C/N Reference Pages Affected FOR PREVIOUS ISSUES REFER TO ARCHIVES S. Prescott 25.06.18 / CN 12338 13, 17, 18 & 44 S. Prescott 09.08.18 / CN 12397 S. Prescott 04.07.19 / CN 13755 S.
  • Page 6 Commercial In Confidence CONTENTS - PAGE Preface Amendment Authorisation Amendment Record Contents SECTION SYSTEM DESCRIPTION Line Replacement Units (LRU) Transmitter Characteristics Replaceable Batteries INSTALLATION LOCATIONS Installation ELT Mounting G-Switch Mounting Location Remote Control Switch Antenna Mounting Interface Unit Water Activated Switch INSTALLATION OF EQUIPMENT Mounting Racks Battery Installation...
  • Page 7 Commercial In Confidence FIGURES PAGE 503-1 ELT including portable whip antenna 503-12 2-Axis G-Switch 503-7 Series Sheet 1 2-Axis G-Switch 503-7 Series Sheet 2 2-Axis G-Switch with GPS 503-35 Series 3-Axis G-Switch 503-19 Series Sheet 1 3-Axis G-Switch 503-19 Series Sheet 2 3-Axis G-Switch with GPS 503-36 Series 3-Axis G -Switch(6-G level)
  • Page 8 Commercial In Confidence 10-264-35 - GPS Antenna (Aircraft Mounted) 10-274-1 - ELT Flexible Whip Antenna (Transmitter Mounted) 0740/1 Interconnect for ELT to 503-15 Interface Unit 0740/2 Interconnect for ELT to Remote Controller 0740/4 Interconnect for ELT to 503-15-1 Interface Unit 0740/6 Interconnect for ELT to 503-15 Interface Unit 0740/7 Interconnect for ELT and Remote Controller 0740/8 Interconnect for ELT to 503-15-1 Interface Unit...
  • Page 9 (QA-00-120) is a software package supplied by Techtest that can be used to Encode or Decode COSPAS-SARSAT messages. This is a stand-alone package that does not connect to any hardware. Line Replacement Units (LRU) The ELT 503 Series system consists of the following components: 503-1 Fig. 1 ELT including portable whip antenna 503-12 Fig.
  • Page 10 0740/20 Interconnect for ELT and Remote Controller Fig. 49 0740/21 Interconnect for ELT and Remote Controller Fig. 50 Transmitter Characteristics 1.2.1 Electrical Performance Frequency 503 Series 121.5 MHz ± 6 KHz 243 MHz ± 12 KHz 406.025 MHz ± 2 KHz 1.2.2 Frequency Stability Medium Term (over 15 minutes) VHF ±...
  • Page 11 Commercial In Confidence 1.2.4 Modulation 121.5/243 MHz Sweep Range 1600 to 300 Hz Sweep Rate 2.8 Hz Amplitude Modulated with Rectangular Wave Modulation Depth 85% minimum Cycle Time 2.3 seconds The average Mark / Space ratio of the Intermittent Carrier is 34% / 66%. 406.025MHz Phase modulation (biphase L, ±...
  • Page 12 Commercial In Confidence 1.3.4 G-Switch Battery Chemistry The G-Switch battery consists of 5 x AA Rechargeable Nickel Metal Hydride Cells with PositiveThermal Coefficient (P.T.C.) fuse. INSTALLATION LOCATIONS Installation Because of the critical nature of an ELT, it is important that the installation be performed according to the following instruction and guidelines as laid down in RTCA DO 182.
  • Page 13 Commercial In Confidence G-Switch Mounting Location The G-Switch is co-located with the ELT in the same racking. Remote Control Switch The remote control switch should be located in the cockpit within easy reach of the aircrew, such that they can test the ELT and switch it to ON in an emergency. The switch has been designed to fit into existing DZUS fasteners, if available.
  • Page 14 Commercial In Confidence 3.1.1 A0637 The mounting tray is designed to meet the requirements of a fixed ELT but, if the need arises, the ELT can be withdrawn from the tray and used as a portable unit. No tools are required to separate the ELT from the tray and G- Switch. The mounting tray must be installed in a position that meets the requirements by having secure attachment points that will survive an incident.
  • Page 15 Commercial In Confidence Battery Installation 3.2.1 ELT Battery A0673-1 Take the ‘O’ ring supplied with the battery out of its bag and carefully install it around the connector spigot in the ELT, ensuring it is fully seated. Install the battery into the ELT by sliding it in until the side locks snap into position.
  • Page 16 Commercial In Confidence The antenna 10-274-1 is the ELT antenna which is stowed with the A0367 mounting rack such that it is to hand when that installation is broken down to provide a portable ELT system. This antenna is shown at Figure 33. Interface Unit The interface unit is suitable for mounting into any convenient position that will allow the inter-unit wiring to pick up GPS information and feed it into the ELT - remote switch...
  • Page 17 Commercial In Confidence INSTALLED SYSTEM TESTING Test Equipment The system, once installed, should be tested to ensure that the control of the ELT is effective from the G-Switch and the remote control switch. No special to type test equipment is required since under the built in test facility an audible tone verifies a serviceable system.
  • Page 18 Commercial In Confidence Remote Control Switch The remote switch has an indicator lamp which repeats the tone and beep in visual form. The guarded switch can be pressed to Test / Reset which will initiate a self test. The in-built sounder and lamp indicate the tone signals and beep. The same switch when pressed down switches the ELT to ON and transmission will begin.
  • Page 19 Commercial In Confidence The ON position of the ARM/OFF/ON switch on the G-Switch over-rides all the other inputs: • It by-passes all other inputs including ‘INHIBIT’. • It does not carry out a BIT. • It does not wait for GPS and therefore does not encode a GPS position. •...
  • Page 20 Commercial In Confidence Ensure that the old ‘O’ ring is removed from the connector spigot when the old battery is removed and that the new ‘O’ ring supplied with the new battery is in place on the connector spigot before re-assembly. The replacement battery is slid into the housing and pressed fully home.
  • Page 21 Commercial In Confidence If the ELT is left switched to ARM at the end of a flight and aircraft power switched OFF then the G-Switch battery maintains G-Switch functionality before becoming discharged. To prevent overly discharging the G-Switch battery, the G-Switch should be selected to OFF if aircraft 28Vdc supply to the ELT will be unavailable for periods exceeding 8 hours.
  • Page 22 Commercial In Confidence EMERGENCY LOCATOR TRANSMITTER Part No. 503-1 Serial No. XXXX WARNING! FOR EMERGENCY USE ONLY XXXXXX Issue 42 - 08.08.24 - CN 22332 HRS1012-04-02...
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