(2021) Service Bulletin 21122: G1000 NXi STC Audio Wiring Update for C90 Series Aircraft

PRODUCTS AFFECTED:

Textron Aviation Inc. (Beechcraft) King Air model C90A, C90GT, C90GTi aircraft equipped with all of the following:

• G1000 NXi Integrated Flight Deck per STC SA01456WI-D
• G1000 NXi System Software Version 3557.00 or 3557.01
• GMA 1360 Audio Panels
• Aural Tone Generators

CERTIFICATION AUTHORIZATION:

STC SA01456WI-D Rev 20

COMPLIANCE:

Mandatory: This STC Service Bulletin must be accomplished no later than December 31, 2022

PURPOSE:

This service bulletin provides instructions for a wiring update to correct low audio levels for warnings as described in Garmin Service Alert 21121.

WARRANTY INFORMATION:

This Service Bulletin is warranty reimbursable with a deadline of December 31, 2022 after which this upgrade will no longer be reimbursable for labor.