Select your product to confirm this information applies to you
(2024) Service Bulletin 23099 Rev B: Approval of GMC 605 Software Version 2.85
PRODUCTS AFFECTED:
GFC 600 autopilots installed per STC SA01844WI using Master Drawing List (MDL) 005-01009-01 Revisions 1 through 60 are affected.
CERTIFICATION AUTHORIZATION:
STC SA01844WI Rev 61
COMPLIANCE:
Recommended: Compliance with this service bulletin is recommended at the next maintenance interval.
DOCUMENTATION CONSIDERATIONS:
Applicable AFMS and ICA documents listed in Table 1, are required to be issued to the aircraft owner/operator before the aircraft is returned to service, if not already provided.
Table 1
| Document Title | Part Number | Revision |
| GFC 600 Automatic Flight Control System Part 23 AML STC Maintenance Manual Includes Instructions for Continued Airworthiness for STC SA01844WI | 190-01938-00 | 13 |
| Airplane Flight Manual Supplement, GFC 600 Autopilot Installed in Beechcraft King Air C90 (S/N LJ-502 through LJ-1062) | 190-02011-12 | 1 |
PURPOSE:
Updated GFC 600 loader images to support the Enhanced Aspen EFD 1000 Max interface.
Updated GMC 605 to Software Version 2.85 to fix an issue where an autopilot disconnect may occur when a flight plan or procedure containing waypoints with specific position data are loaded, as described in Garmin Service Advisory 23080.
WARRANTY INFORMATION:
This modification is warranty reimbursable with a deadline of March 29, 2024.