Select your product to confirm this information applies to you
(2024) Service Advisory 24062 Rev A: VNAV in GFC™ 500 Automatic Flight Control Systems
PRODUCTS AFFECTED:
GI 275 Multi-function Instruments interfaced to GFC 500 systems are affected.
ISSUE:
The GFC 500 will not activate VNAV when in a holding pattern and the TOD (Top of Descent) is on the outbound leg.
ACTION:
Make sure the TOD is on the inbound leg of the holding pattern after arming VNAV.
RESOLUTION:
This will be fixed in a future GI 275 software release.