GDL 90 System ICA, Helicopter STC
Garmin AT
2345 Turner Rd SE
21 December 2005
Salem, OR 97302
Part #: 560-0255-00 Rev A
©
Copyright 2005 Garmin AT All Rights Reserved
Page 4 of 13
1
Introduction
This document contains Instructions for Continued Airworthiness (ICA) compliant with 14 CFR
27.1529 and Part 27 Appendix A requirements. The ICA includes information required by the
operator to adequately maintain the GDL 90 system. This system has built-in-self test features
and fault annunciation that notify the pilot in the event of system component failure. This
document refers to other documents for specific information that is either part of the installation
package or an existing part of the aircraft’s permanent record.
1.1
Document Revision & Distribution Process
ICA revisions must be submitted for ACO approval. The ACO will obtain AEG acceptance, and
issue evidence of approval. After ACO approval, Garmin AT will release the revised ICA for
customer use, and provide any required notification of the revision.
The latest revision of this document is distributed on the GDL 90 UAT Sensor Product CD
(Garmin AT P/N 140-0063-xxx), shipped with each new GDL 90 or GSL 71 unit. The latest
revision is also available on the Garmin website (Garmin.com). A Garmin Service Letter,
describing ICA revision, will be sent to dealers and/or GDL 90 or GSL 71 owners of record if
revision is determined to be significant.
1.2
Airworthiness Limitations Section (ALS)
The airworthiness limitations section is FAA approved and specifies inspections and other
maintenance required under §43.16 and §91.403 of the Federal Aviation Regulations (FAR)
unless an alternative program has been FAA approved.
There are no mandatory replacement times for the GDL 90 or GSL 71 in this STC installation.
There are no mandatory structural inspections associated with this STC.
See Rotorcraft Flight Manual Supplement (as detailed in the Master Drawing List listed in
Section 2.1) for system limitations.
1.3
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. If
desired, the data within this document may be reformatted and used by the installing agency of
the Garmin GDL 90 or GSL 71 in a comprehensive ICA for the rotorcraft.
1.4
Assistance
Flight Standards Inspectors or the certificate holder’s PMI have the required resources to
respond to questions regarding this ICA. In addition, the customer may refer questions regarding
this equipment and it’s installation to the manufacturer, Garmin AT. Garmin AT customer
assistance may be contacted during normal business hours via telephone or email.
