Mooney M20M, Pilot Operating Handbook

Page: 331 / 377

190-02291-18 Rev. 5 AFMS – GFC 500 Mooney M20M/M20R/M20S Series
Page 4–1
SECTION 4 – NORMAL PROCEDURES
GFC 500 POWER UP
During the preflight test the G5, GI 275, or G3X will display PFT in the autopilot status box. When the
GFC 500 passes preflight test, PFT will be removed from the autopilot status box.
FLIGHT DIRECTOR / AUTOPILOT NORMAL OPERATING
PROCEDURES
Autopilot/Flight Director mode annunciations are displayed at the top of the G5 Electronic Flight
Instrument, at the top of the G3X Electronic Flight Instrument System PFD, or at the bottom of the GI 275
Electronic Flight Instrument ADI. Green text indicates active autopilot/flight director modes. Armed modes
are indicated in white text. Normal mode transitions will flash inverse video for 10 seconds before
becoming steady. Abnormal mode transitions will flash for 10 seconds in amber text before the default
mode is annunciated as the active mode in green text. Default autopilot/flight director modes are Roll
(ROL) and Pitch (PIT) modes.
The autopilot status box displays the autopilot engagement status as well as armed and active flight
director modes.
Autopilot Engagement with Flight Director Off — Upon engagement, the autopilot will be set to hold
the current attitude of the airplane if the flight director was not previously on. In this case, ‘ROL’ and ‘PIT’
will be annunciated.
Autopilot Engagement with Flight Director On — If the flight director is on, the autopilot will smoothly
pitch and roll the airplane to capture the FD command bars. The prior flight director modes remain
unchanged.
Autopilot Disengagement — The most common way to disconnect the autopilot is to press and release
the AP DISC / TRIM INT button located on the control wheel. An autopilot disconnect tone will sound and
an amber AP will be annunciated on the G5, GI 275, or G3X autopilot status box. If the optional yaw
damper is installed, the AP DISC / TRIM INT button will also disconnect the yaw damper, and a
disconnect tone will sound and an amber YD will be annunciated on the G5 autopilot status box.
Other ways to disconnect the autopilot include:
– Pressing the AP Key on the GMC 507 Mode Controller. If the optional yaw damper is installed, it will
remain engaged until the YD Key is pressed, or the red AP DISC / TRIM INT button is pressed.
– Operating the Electric Pitch Trim Switch (located on the control wheel). If the optional yaw damper is
installed, it will remain engaged until the YD Key is pressed, or the red AP DISC / TRIM INT button is
pressed.
– Pulling the autopilot circuit breaker.
In the event of unexpected autopilot behavior, pressing and holding the AP DISC / TRIM INT button will
disconnect the autopilot and remove all power to the servos.
Yaw Damper Engagement with Autopilot On –- Upon engagement of the autopilot, if the yaw damper
is installed, it will automatically engage to provide yaw damping and turn coordination. YD will be
annunciated in the autopilot status box.
Yaw Damper Engagement with Autopilot Off –- The yaw damper, if installed, may be engaged with the
autopilot disengaged. This will provide yaw damping and turn coordination. YD will be annunciated in the
autopilot status box.