190-02011-11 Rev. 2
GFC 600 Autopilot Installed in Piper PA-46-310P/350P
Page 43 of 46
PREFLIGHT TEST
During the preflight test the GMC 605 will display PFT in the Message Window. LED fault lights on the
GMC 605 autopilot mode panel cycle through a test sequence, three amber lights for one second, followed
by three red lights for one second, then extinguish if the preflight test successfully passes. The autopilot
disconnect tone sounds at the completion of the preflight test. If the GFC 600 passes preflight test, the
display on the GMC 605 will be blank and all LED fault lights extinguished. If GFC 600 fails the PFT, PFT
FAIL is displayed in the message window the AP LED in red illuminates.
If the GI 285 remote autopilot mode display is installed, it will cycle through an annunciator light test during
the GFC 600 preflight test. All lateral mode annunciations will illuminate amber, followed by AP, YD, TRIM
annunciations in amber, all vertical mode annunciations illuminated amber, and finally the AP, YD, and
TRIM annunciations in red. If the preflight test passes, all annunciations on the GI 285 will extinguish.
MESSAGES
GMC 605 Messages
AIL TRM LF
Aileron Trim Left - Autopilot is holding left wing down roll force. Amber AP
LED flashes amber for 5 seconds then remains steady amber. If installed,
the GI 285 TRIM indicator illuminates yellow.
AIL TRM RT
Aileron Trim Right - Autopilot is holding right wing down roll force. Amber
AP LED flashes amber for 5 seconds then remains steady amber. If
installed, the GI 285 TRIM indicator illuminates yellow.
AIRDAT FAIL
Air data input to the GFC 600 has failed. Vertical modes that require air
data input are failed.
ALT KEY STK
ALT key stuck – System has sensed ALT key input for 30 seconds or longer.
AP FAIL
Autopilot Failed – The autopilot is inoperative. Red AP LED will flash until
the pilot presses the AP key. Once AP FAIL acknowledged, the Red AP
LED will be steady. If installed, the GI 285 AP indicator illuminates red.
AP KEY STK
Autopilot key stuck – System has sensed AP key input for 30 seconds or
longer.
APR KEY STK
Approach key stuck – System has sensed APR key input for 30 seconds or
longer.
BC KEY STK
Back Course key stuck – System has sensed BC key input for 30 seconds or
longer.
CWS
System is in Control Wheel Steering mode. If installed, the GI 285 AP
indicator illuminates white.
DISABLD KEY
Disabled Key – The pressed key is inactive; it has no associated mode.
This message will extinguish after 3 seconds.
Summary of Contents for GFC 600
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