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

Page: 1515 / 1956

PAGE 1
Feb 28/07 7J21
80-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
CRANKING
1. Cranking Limitations
Starter manufacturers recommend limiting cranking to no more than ten (10) second periods. Allow two
(2) minutes for cool-down between cranking attempts. Lengthy cranking will shorten the starter’s life.
Repeat no more than five (5) times. If start not achieved in the fifth attempt, let starter cool for thirty (30)
minutes before reattempt.
2. Kelly Aerospace Starter (aka Electrosystems, Prestolite)
WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING
OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY
RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY
PUBLICATIONS.)
S/N’s 4636001 thru 4636402.
A. Description
When the starting circuit is energized, battery current is applied to the starting motor terminal.
Current flows through the field coils creating a strong magnetic field. At the same time, current also
flows through the brushes and commutator, and finally through the armature to ground. The result is
a high cranking torque, for a limited period of time, with a high current flow at a minimum loss of
voltage.
The drive end gear of the armature mates with the reduction gear which drives the Bendix shaft.
The Bendix drive is held in position on the shaft by a spiral pin. As the armature turns the reduction
gear, the Bendix drive pinon meshes with the starter drive gear by inertia and action of the spiral
grooves within the Bendix unit. A detent pin engages in a notch in the screw threads which prevents
demeshing if the engine fails to start. When the engine does start and reaches a predetermined
speed, centrifugal action forces the detent pin to release and allows the pinion to demesh from the
starter drive gear.
B. Troubleshooting
See Chart 1.
NOTE: In Chart 1, for any remedy which requires disassembly and cleaning or repair of the starter;
replacement with a new, or known good, unit is always an alternative solution.
NOTE: NEVER USE JUMPER CABLES to test voltage to the starter. The "toothed" jaws of jumper
cables are meant to "bite" into soft, leaded terminals on car batteries, and simply WILL
NOT provide enough contact with the starter terminal to supply the needed amperage to
engage the starter properly.
NOTE: Use an analog voltage meter if you can. Digital meters take intermittent 'snap shots' of
voltage. In situations where voltage is being supplied intermittently (even in rapid cycles),
the digital meter will simply not provide the correct 'picture' of the aircraft's voltage
situation.
C. Removal
CAUTION: TO PREVENT SHORT CIRCUITING, DISCONNECT THE GROUND CABLE FROM
THE BATTERY BEFORE REMOVING THE STARTER FROM THE ENGINE.
(1) Disconnect starter cable from starter terminal post.
(2) Remove one (1) each mounting bolt, internal tooth “star” lock washer, and flat washer; and
three (3) each mounting nuts, internal tooth “star” lock washers, and flat washers.
(3) Lift off starter motor.