GFC 600 systems installed under the GFC 600 Part 23 AML STC SA01844WI are affected.
Optional: This Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.
GMC 605 software version 2.21 includes support for Descent Vertical Navigation (VNAV).
GMC 605 software version 2.21 is approved for all aircraft models currently on the GFC 600 Part 23 AML, however VNAV functionality is currently approved only for the Textron Aviation 58/58A aircraft and the Textron Aviation 36/A36/A36TC aircraft.
VNAV functionality requires the following:
- Interface to a Garmin GTN 6XX/7XX with software version 6.50 or later
- Interface to one of the following:
o Garmin GDU 620 with software version 7.30 or later
o Garmin GDU 7XX/1060 with software version 2.20 or later
o Garmin G5 Electronic Flight Instrument with software version 5.50 or later
GMC 605 software version 2.21 is not compatible with GDU 620, GDU 7XX/1060, or GTN 6XX/7XX software versions prior to those listed above. When updating GMC 605 software to version 2.21 it is also required to update GDU 620, GDU 7XX/1060, or GTN 6XX/7XX software (if installed) to the versions listed above prior to operation.