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(2024) Service Bulletin 2139 Rev A: GTR 225/GNC 255 Display Software Version 3.02
PRODUCTS AFFECTED:
GTR 225 and GNC 255 products listed below with Display Software 3.01 are affected.
NOTE
GTR 225 and GNC 255 products with part numbers ending in -00 or -20 should not install Display Software Version 3.02.
| Model | Appliance P/N | Serial Numbers |
|---|---|---|
| GTR 225 | 011-02718-40 | 6MJ0xxxxx |
| GTR 225A | 011-02807-40 | 6MK0xxxxx |
| GTR 225B | 011-02808-40 011-02808-60 | 6ML0xxxxx 6ML2xxxxx |
| GNC 255A | 011-02806-40 | 6MM0xxxxx |
| GNC 255B | 011-02719-40 011-02719-60 | 6MN0xxxxx 6MN2xxxxx |
CERTIFICATION AUTHORIZATION:
TSO Authorization
TSO authorization does not provide installation airworthiness approval. Separate installation airworthiness approval is required for type certified aircraft. Notification of revision to any Garmin STC(s) will be provided under a separate service bulletin.
COMPLIANCE:
Optional: This Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.
DOCUMENTATION CONSIDERATIONS:
No changes were made to the Pilot’s Guide for GTR 225/GNC 255 Display Software Version 3.02.
NOTE
The Pilot’s Guides for Display Software Version 3.01 are applicable to Display Software Version 3.02.
- GTR 225/225A/225B Pilot's Guide (Garmin P/N 190-01182-00) Rev D or later
- GNC 255A/255B Pilot's Guide (Garmin P/N 190-01182-01) Rev E or later
PURPOSE:
Display Software Version 3.02 contains the following changes:
- Fixes the System ID to allow the frequency database to be updated
- Corrects the Glideslope flag on NMEA serial interface
- Prevents loading of software versions prior to 3.xx
WARRANTY INFORMATION:
This modification is not warranty reimbursable.