Service difficulty report · Housing

Difficulty date
February 22, 2006
Submitted
March 15, 2006
Operation
General aviation
Part
Housing
Part number
ALU1003
Condition
Worn
Location
Alternator
Component
Alternator
Component part number
ALX9525B
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

THIS ALTERNATOR HAS 0 HRS TIME IN SERVICE. DURING INSPECTION OF THIS UNIT. IT WAS DISCOVERED THAT THE DRIVE-END BEARING BORE WAS .006, OVERSIZE AND THE BEARING WAS VERY LOOSE IN THE BEARING BORE. THIS END FRAME SHOULD HAVE BEEN REJECTED DURING THE OVERHAUL PROCEDED DUE TO THE EXCESSIVE WEAR OF THE BEARING BORE. THIS SAME DEFECT WAS NOTED ON 2 OF THE LAST 3 UNITS RECEIVED. RECOMMENDATION INCLUDE A CLOSER INSPECTION FOR WEAR OF THE DRIVE END BEARING BORE SINCE THIS IS A FREQUENT PROBLEM WITH THIS MODEL. (K)