General Description
1.5 Audio Entertainment Installation Limitations
The GDL 69A XM Satellite Radio audio entertainment and optional GRT 10/GRC 10 wireless remote
system may be installed to all passenger locations for all aircraft on the STC Approved Model List
(AML). XM audio entertainment to crew locations depends on aircraft installation, which must meet
requirements of 14 CFR §23.1431(e).
For purpose of this STC, 14 CFR §23.1431(e) requires that each pilot station must be able to hear the
aircraft's stall warning horn with the entertainment system audio set to the maximum pilot controllable
setting. This also applies to aircraft with a gear extension warning horn. Aircraft which have electric
stall/gear warning may utilize the GDL 69A audio suppression discrete input to turn off the music during
an event. For these installations, the XM audio may be provided to the crew locations.
For aircraft installations with non-electric stall/gear warning horns, this STC does not provide data for
installation of audio entertainment to crew locations. The GDL 69A audio entertainment may not be
wired to crew locations without a separate evaluation that is beyond the scope of this STC. It is possible
for installers to seek evaluation and approval of an alternate installation by means of the field approval
process. Each installation or aircraft type must be evaluated for compliance with 14 CFR §23.1431(e).
This evaluation may determine that the required horns can be heard satisfactorily without disabling the
GDL 69A audio entertainment to the crew.
The optional GRT 10/GRC 10 wireless remote system has been tested for interference as part of the STC.
Its operation must not interfere with the proper operation of any required aircraft equipment or systems.
STC installation requires that the installer verify that there is no interference using the post-installation
check-out procedure detailed in Section 4. Operators may use the STC qualification of the device as a
basis for showing compliance with 14 CFR Part 91.21.
GDL 69/69A Installation Manual
Page 1-5
190-00355-02
Rev. F
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