Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 579 / 1956

PAGE 1
Feb 28/07 3E11
27-50-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
FLAPS
1. Flap Drive System (Refer to Figure 1)
The flaps are driven by an electric motor-actuator unit. The motor-actuator is mounted below the floor at
fuselage station (F.S.) 167.97. Remove the seat, cabinet (if necessary), and floor boards to gain access
to the motor.
The drive system contains two movable micro-switches on a cam mechanism (one each for up and down
flap movement), warning horn micro-switch on cam bracket, current sensor, relay, and mechanical
linkages. A removable cover on the right forward floor gives access to the switches. The sensor and relay
are located on a plate assembly aft of motor. The cover is secured with velcro tabs for easy removal.
Pushrods are connected to the actuator at both ends. These pushrods extend out through the fuselage
and connect to bellcranks in the wings at wing station (W.S.) 29.00. Additional pushrods extend out
along the wing rear spar to an idler arm at W.S. 64.00 and on to another bellcrank at W.S. 93.00.
Pushrods connected to the bellcranks at W.S. 64.00 and W.S. 93.00 connect the flaps to complete the
drive system.
To ensure a good pressure seal at the fuselage exit points of the flap drive pushrods, a bellows is
connected to the pushrods and tube assemblies which are part of the fuselage structure, thus sealing
the opening and preventing any air loss from the pressurized cabin.
The flap selector provides four positions: Full up (0°), 10°, 20°, and full down (36°). All positions are
preselected by the flap control lever on the instrument panel. A flap position warning system is provided
to warn when the flaps are extended to or beyond the approach position without the landing gear fully
extended and locked.
2. Troubleshooting
See Chart 1.
CHART 1
TROUBLESHOOTING FLAP CONTROL SYSTEM
Trouble Cause Remedy
Flaps fail to extend or Motor-Actuator inoperative. No electrical power to
retract. motor. Check circuit
breaker.
Flaps not synchronized Incorrect rigging of Adjust flaps.
or fail to move evenly system.
when retracted.