Service difficulty report · Cotter Pin · Cessna 401

Difficulty date
May 23, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Cessna 401
Aircraft time
12,817 hours
Engine
Cont TSIO520E
Propeller
Mcauly 3AF32C87
System (JASC)
2422 · AC Inverter
Part
Cotter Pin
Part number
MS24665302
Condition
Missing
Location
Alternator
Component
Alternator · Kelly
Component part number
ALT9522
Stage of operation
CR
How discovered
9
Nature of condition
W
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) IN LEVEL CRUISE FLGHT THE LT ALTERNATOR STOPPED PRODUCING POWER. AFTER LANDING OIL WAS DISCOVERED UNDER THE LT ENGINE. THE ALTERNATOR WAS REMOVED. THE ALTERNATOR ARMATURE WAS FOUND BROKEN OFF. THE COTTER PIN HOLDING THE DRIVE GEAR NUT WAS FOUND MISSING. THE OIL FILTER WAS REMOVED AND INSPECTED, NO CONTAMINATION WAS FOUND AT THIS TIME.

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