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(2023) Service Advisory 21124 Rev D: ILS Approaches
REVISION D:
Added GTN Resolution
PRODUCTS AFFECTED:
GTN Xi (with software versions 20.01 and later) and GTN (with software versions 6.60 and later) navigators interfaced to both a G5 and a GFC 500 are affected.
ISSUE:
When selecting the following ILS approaches on the GTN/GTN Xi navigator, the GFC 500 is not able to capture the glideslope.
| Airport | ILS/Runway | Airport | ILS/Runway | Airport | ILS/Runway | Airport | ILS/Runway | |||
| BIKF | 19 | KDFW | 17R | KLTS | 18L | KTCM | 16 | |||
| CYYC | 17L | KEDE | 19 | KLTS | 18R | KTIK | 18 | |||
| DAOR | 18 | KEND | 17C | KMTJ | 17 | KVAD | 18L | |||
| KADW | 19R | KEWK | 17 | KOKC | 17L | LEMD | 18L | |||
| KBYH | 18 | KFAR | 18 | KOKM | 18 | LEMD | 18R | |||
| KCEV | 18 | KGLH | 18L | KOLV | 18 | MMIO | 17 | |||
| KCOS | 17L | KHDC | 18 | KOMA | 18 | RCKU | 18 | |||
| KCVG | 18L | KHRL | 17R | KPBF | 18 | SANU | 18 | |||
| KDEN | 17L | KHUM | 18 | KPNC | 17 | SARP | 19 | |||
| KDEN | 17R | KIAD | 19L | KRNO | 16R | ZSJN | 19 | |||
| KDFW | 17C | KJVY | 18 | KSEA | 16R | |||||
| KDFW | 17L | KLNK | 18 |
ACTION:
Disconnect the autopilot and hand-fly the approach at the glideslope intercept point.
RESOLUTION:
This issue has been fixed in GTN Xi Main Software Version 20.30. Refer to Garmin TSO Service Bulletin 22108.
This issue has been fixed in GTN Main Software Version 6.73. Refer to Garmin TSO Service Bulletin 23065.