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

Page: 1344 / 1956

PAGE 2
Feb 28/07
7C18
61-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
B. Installation
(1) Clean the mounting pad and the governor drive shaft thoroughly.
(2) Coat the mounting gasket with Dow Corning release agent or equivalent.
(3) Lubricate the drive shaft with engine oil and install the governor, with control mounting bracket.
on the mounting pad.
(4) Tighten the mounting bolts evenly and tighten to a final torque as shown in Figure 1.
(5) Connect the control cable to the control arm. Check to be sure the attachment bolt and
hardware are installed properly and do not contact the governor body while moving the control
arm through its full travel.
C. Rigging and Adjustment
(PIR-FTP2001-8, Rev. E., -8-1, Rev. A.)
(1) Start the engine; park the airplane 90° to the wind direction and warm in a normal manner until
the oil temperature reaches 180°F.
(2) To check the high rpm, low pitch setting, move the propeller control all the way forward. At this
position the governor speed control arm should be against the high rpm fine adjusting screw.
With the throttle full forward, observe engine rpm, which should stabilize between 2,460 and
2,500 rpm. A takeoff must be conducted during which the engine rpm should reach 2,460 -
2,500 rpm and remain steady.
(3) If the engine rpm does not read 2,460 - 2,500 rpm in flight, the high rpm setting must be
adjusted as follows:
(a) Land and shut down the engine.
(b) Adjust the governor by means of the fine adjustment screw for 2,460 - 2,500 rpm. To do
this, loosen the high rpm fine adjustment screw locknut and turn the screw in a clockwise
direction to decrease engine speed or in a counterclockwise direction to increase engine
speed.
NOTE: One revolution of the fine adjustment screw will increase or decrease the engine
speed approximately 20 rpm.
(c) Repeat step (b), above, as required to obtain proper rpm setting.
(d) After setting the proper high rpm adjustment, run the self-locking nut on the fine
adjustment screw against the base projection to lock.
(4) With the high rpm adjustment complete, the control system should be adjusted so that the
governor control arm will contact the high rpm stop when the cockpit control knob is 0.032 to
0.047 of an inch from its full stop forward. Reconnect the cable end and tighten the jamnut.
(Upper cowl must be removed to accomplish this adjustment.)
(5) It is usually only necessary to adjust the high rpm (low pitch) setting of the governor control
system, as the action automatically takes care of the positive low rpm (high pitch) setting.