Service difficulty report · Stud · Cessna 172S

Difficulty date
January 2, 2004
Submitted
January 2, 2004
Operation
General aviation
Aircraft
N5169F
Make and model
Cessna 172S
Aircraft serial
172S9152
Engine
Lyc IO360L2A
Propeller
Mcauly 1A103TCM
Part
Stud
Condition
Melted
Location
Alternator
Component
Alternator
Component part number
991059111RX
Stage of operation
CR
How discovered
O
Nature of condition
H, J
Precautionary procedure
O

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

What was found

POSITIVE TERMINAL ON ALTERNATOR MELTED. INSPECTED ALTERNATOR WIRING HARNESS FOR CORRECT ROUTING AND DAMAGE. PROBABLE CAUSE FOR THIS MALFUNCTION OCCURRED IN THE ALTERNATOR ITSELF, AS THE POSITIVE STUD AND NUT WERE RECOVERED WITH THE NUT IN THE TORQUED POSITION. ALSO THERE WAS NO EVIDENCE OF ARCING BETWEEN THE ALTERNATOR AND ADJACENT GROUNDS, (BAFFLES,ENGINE CASE, ECT.) REPAIRED POSITIVE WIRE, INSTALLED OVERHAULED ALTERNATOR PN 9910591-11RX, SN A-174533, AND NEW NOISE FILTER PN S1915-3. RUNUP AND OPERATIONAL CHECK OK.

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