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Instructions for Continued Airworthiness
Part Number: 560-0255-00
TM
Garmin AT
is a trademark of Garmin Ltd. or its subsidiaries.
GDL 90 System
Helicopter STC
(AS-350 Series)
Document Revision: A
21 December 2005
Garmin AT, Inc.
2345 Turner Rd SE
Salem, OR 97302 USA
Phone (503) 581-8101
FAX (503) 364-2138
Printed in the USA
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Summary of Contents for Garmin AS-350 Series
- Page 1 Part Number: 560-0255-00 Document Revision: A 21 December 2005 Garmin AT, Inc. 2345 Turner Rd SE Salem, OR 97302 USA Phone (503) 581-8101 FAX (503) 364-2138 Garmin AT is a trademark of Garmin Ltd. or its subsidiaries. Printed in the USA...
- Page 2 GDL 90 System Instructions for 560-0255-00 Continued Airworthiness, Helicopter Prepared by: Date: 21 December Marvin A. Kumley 2005 Approved Date: 22 Dec 2005 Thomas L. Mosher Tom Mosher GDL 90 Project Manager © Copyright 2005 Garmin AT All Rights Reserved Page 2 of 13...
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Page 3: Table Of Contents
RONT ANEL 1: GDL 90 S ........................7 ABLE YSTEM OMPONENTS 2. U .............................11 ABLE EIGHTS 3. U ...........................11 ABLE ENTER OF RAVITY 4. U .............................11 ABLE OWER OADS © Copyright 2005 Garmin AT All Rights Reserved Page 3 of 13... -
Page 4: Introduction
Section 2.1) for system limitations. Permission to use Certain Documents Permission is granted to any corporation or person applying for approval of a Garmin GDL 90 or GSL 71 installation to use and reference appropriate STC documents to accomplish the Instructions for Continued Airworthiness and show compliance with STC engineering data. -
Page 5: Instructions For Continued Airworthiness
This document identifies the Instruction for Continued Arrangement: Airworthiness for installation of the Garmin GDL 90 System. Applicability: Applies to rotorcraft altered by installation of the Garmin GDL 90 System. Definition of Abbreviations: AEG – Aircraft Evaluation Group ALS – Airworthiness Limitations Section BIT –... -
Page 6: Description Of Alteration
Part #: 560-0255-00 Rev A Description of Alteration Installation of the Garmin GDL 90 Data Link Sensor with UAT antenna, GPS/WAAS antenna, and other system interfaces. The GDL 90 can interface to the pilot through optional existing equipment, such as the Garmin MX20 Multi-Function Display. Altitude data can be provided directly to the GDL 90 as shown in Figure 1, or through other compatible interfaced equipment, such as the MX20. - Page 7 Part #: 560-0255-00 Rev A The Garmin GSL 71 is an optional control panel for the GDL 90 UAT datalink. It is certified under TSO C154. The GSL 71 can control the GDL 90 and provide the operational status of the GDL 90.
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Page 8: Control, Operating Information
The GDL 90 has an internal keep-alive battery that will last about 10 years. The battery is used for retention of internal ram memory data and GPS system information. Regular © Copyright 2005 Garmin AT All Rights Reserved Page 8 of 13... -
Page 9: Cleaning The Gsl 71 Front Panel
GPS signal acquisition time may be increased. There is no loss of function or accuracy of the GDL 90 with a discharged battery. The battery must be replaced by the Garmin AT factory repair station or factory authorized repair station. Refer to GDL 90 Maintenance Manual, listed under reference documentation in paragraph 2.1 of this document, for battery replacement instructions. -
Page 10: General Procedural Instructions
Table 2 identifies the weight of the GDL 90 System equipment. Table 3 lists the expected center of gravity for GDL 90 System equipment as installed in various rotorcraft. © Copyright 2005 Garmin AT All Rights Reserved Page 10 of 13... -
Page 11: Diagrams
2.10 Diagrams Refer to the GDL 90 and/or GSL 71 Installation Manuals (listed under reference documentation in paragraph 2.1 of this document) for drawings applicable to this installation. © Copyright 2005 Garmin AT All Rights Reserved Page 11 of 13... -
Page 12: Special Inspection Requirements
2.1 of this document. Use of the 3/32" hex driver provided in the GSL 71 installation package (Garmin AT P/N 998- 0048) is recommended for reinstallation of the GSL 71, to prevent damage to the GSL 71 (see Section 2.8). - Page 13 Part #: 560-0255-00 Rev A For operators under FAR 121/135, this ICA must be incorporated into the operator’s approved maintenance program through coordination and approval with the certificate holder’s PMI/POI as applicable. © Copyright 2005 Garmin AT All Rights Reserved Page 13 of 13...
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