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Aviation Alerts and Advisories

Service Advisory 1421: G600 Outside Air Temperature (OAT) Display

SYSTEM: G600 systems installed in TBM 700/850 aircraft.

ISSUE:
Garmin has received reports of confusion regarding which of the two temperature values – Indicated Outside Air Temperature (IOAT) or Static Air Temperature (SAT) – listed in the TBM 700/850 Pilot Operating Handbook (POH) correlates to the temperature displayed by the G600. The G600 displays temperature in a field labeled “OAT” and is equivalent to SAT values listed in the TBM 700/850 POH.

PILOT ACTION:
Use the OAT value from the G600 PFD to correspond with SAT values in the TBM 700/850 POH. Refer to the G600 Pilot’s Guide, Section 2.8.2, for more information regarding the G600 temperature display.

RESOLUTION:
The ability to display different types of air temperature values (e.g. SAT, ISA, TAT) is planned in a future GDU 620 software release.

Download 1421A