COMPLIANCE
Recommended for installations that need the GTN to be qualified to RTCA/DO-160F, Section 8, Category U, Curve G vibration (typically used for helicopters).
Optional for all other installations.
PURPOSE
Mod Level 2 improves Com and Nav isolation for installations with limited room to space antennas, reducing the likelihood of GTN Com transmissions causing the squelch to break or the VOR receiver to flag.
The Mod Level 2 configuration is necessary for GTN Navigation System installations that need the GTN 750 to be qualified to RTCA/DO-160F, Section 8, Category U, Curve G vibration (typically used for helicopters).
PRODUCTS AFFECTED
GTN 635/650 and GTN 750
DESCRIPTION
This service bulletin provides instructions related to the disposition of the GTN 635/650 and GTN 750 as related to Mod Level 2.