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(2019) Service Bulletin 1888 Rev B: Approval of G500/G600 TXi Main Software Version 2.30 and GSU 75/75B AHRS Software Version 2.06 for AML STC SA02571SE


REVISION B:

Added GSU 75/75B Reset Information

PRODUCTS AFFECTED:

G500/G600 TXi PFD/MFD/EIS display systems installed using Approved Model List (AML) Supplemental Type Certificate (STC) SA02571SE are affected.

CERTIFICATION APPROVAL:

STC SA02571SE

COMPLIANCE:

Recommended: GSU 75/75B AHRS Software Version 2.06 is recommended at the next scheduled maintenance interval. All other software versions are optional.

PURPOSE:

STC SA02571SE, Master Drawing List revision 5 includes G500/G600 TXi Main Software Version 2.30.

G500/G600 TXi Main Software Version 2.30 expands the TXi interface. The TXi can now be interfaced to a certified standalone G5 (via GAD 29/29B) without a GFC 500 autopilot system.

NOTE
Previously, the TXi could only interface with a G5 when a GFC 500 autopilot system was also installed.

GSU 75/75B AHRS Software Version 2.06 fixes a problem that causes the GSU 75/75B unit to reset during flight.  Under extremely rare conditions, when the GSU 75/75B is operating in Reversionary Mode, the GSU 75/75B units may simultaneously reset during significant accelerations/decelerations such as those experienced during takeoff and landing.  This issue does not occur when the AHRS is operating in Primary Mode and does not result in misleading data.


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