Service difficulty report · Rotor Shaft · Beech 35C33A

Difficulty date
May 28, 2010
Submitted
May 28, 2010
Operation
General aviation
Aircraft
N7AS
Make and model
Beech 35C33A
Aircraft serial
CE169
Engine
Cont IO520*
Part
Rotor Shaft
Condition
Sheared
Location
Alternator
Component
Alternator
Component part number
ALX9524R
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

ALTERNATOR FAILED IN FLIGHT. THIS IS THE 3RD FAILURE IN LESS THAN 100 HRS (18HRS, 17HRS, & 36HRS) THE PREVIOUS (2) WERE REPLACED UNDER WARRANTY. ALL (3) HAVE HAD IDENTICAL ROTOR SHAFT TORSIONAL FAILURE JUST INTERNAL TO THE ALTERNATOR BETWEEN THE FAN AND THE INBD BEARING.

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