(2019) Service Bulletin 1919 Rev A: GMA 342/345 System Software Version 2.20

PRODUCTS AFFECTED:

GMA 342 (011-03520-10) and GMA 345 (011-03520-00) units with System Software Version 2.10 (or earlier) are affected.

CERTIFICATION AUTHORIZATION:

TSO Authorization

COMPLIANCE:

Optional: This Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.

PURPOSE:

GMA 342/345 System Software Version 2.20 includes the following enhancements:

• Improves “passengers always get music 2” option. When configured radio and alert audio will not mute passenger music and volume level will be fixed (instead of adjusted by copilot music volume knob).
• Improves audio filtering for wired telephone input.