Gfc 500 Return To Service Procedure - Garmin GFC 500 Maintenance Manual

9. GFC 500 Return to Service Procedure

The following sections will verify the proper operation of the GFC 500 Autopilot after
maintenance has been performed on the system. Operational information regarding the GFC
500 Autopilot can be found in the G5 Electronic Flight Instrument Pilot's Guide for Certified
Aircraft, p/n 190-01112-12.
9.1 Yaw Offset and Pitch/Roll Offset Calibration
Perform the following procedures if the GMC 507 is replaced or when the GMC 507 rack is
removed or loosened.
NOTE: If the G5 ADI has been replaced, perform the G5 pitch/roll offset procedures outlined in
Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual including ICA,
p/n 190-01112-11 before completing this section.
1. Start the G5 ADI in configuration mode by pressing and holding the knob while applying
power to the system.
2. If the GMC 507 is installed in a panel that is perpendicular to the aircraft forward motion,
skip to step 6. If the GMC 507 is installed in a panel which is not perpendicular to the
aircraft forward motion (i.e. in a canted panel), Navigate to the Flight Controls -> Mode
Control Panel -> Calibrate Yaw Offset page and press the knob.
3. Scroll through the yaw offset calibration pages, following the instructions on each page
to ensure that the system is ready for calibration.
4. Select the appropriate value of yaw offset and press the knob.
5. When the test is complete, select Done to return to the Flight Controls -> Mode Control
Panel page.
6. Navigate to the Flight Controls -> Mode Control Panel -> Calibrate Pitch/Roll page and
press the knob.
7. Scroll through the pitch/roll calibration pages, following the instructions on each page to
ensure that the system is ready for calibration.
8. Select Calibrate to start the calibration process.
9. When the test is complete, select Done to return to the Flight Controls -> Mode Control
Panel page.
9.2 Pre-Flight Test (PFT)
Pre-Flight Test (PFT) is accomplished automatically by the GFC 500 Autopilot after the system
is powered up in normal mode.
1. Apply electrical power to the aircraft.
2. Verify that the G5 displays PFT on the display during PFT.
3. Verify that at the conclusion of PFT, the PFT annunciation is removed from the G5.
4. Disable the GPS navigator providing signal to the G5 by pulling its circuit breaker.
5. Using an air data test set, apply 35-40 knots of airspeed.
GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual
190-02291-01
Page 26
Revision 1