Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page C-7
C.7 IRU/AHRS
Other IRU/AHRS sources can provide heading to the GTN via the following ARINC 429 labels:
• 314-True Heading
• 320-Magnetic Heading
IRU/AHRS not listed below can still be approved under the GTN AML STC if all of the following
conditions are met:
• The IRU/AHRS provides ARINC 429 labels 314 and/or 320;
• The installation of the IRU/AHRS was previously FAA-approved;
• The checkout procedure described in Section 5.6.11 must be completed successfully before
approving the aircraft for return to service;
• The connections to the GTN must utilize shielding wiring of the type specified in this manual.
Shields must be terminated on the GTN side to connector shield block ground and on the
IRU/AHRS side in accordance with the IRU/AHRS installation data. If the IRU/AHRS
installation data does not specify a shielding method then terminate the shield at the IRU/AHRS
using the guidelines provided in Section 2.4.11.4 Shield Termination Considerations.
If these conditions are met, the interface can be approved under this GTN AML STC.
Manufacturer Model Data Format Notes/Configuration
Collins AHS-85E ARINC 429 INS/IRU, high speed