SDR CA040720004

Service difficulty report · Alternator · Cessna 172N

Difficulty date: July 10, 2004
Submitted: January 5, 2005
Operation: General aviation
Make and model: Cessna 172N
Aircraft time: 10,328 hours
Engine: Lyc O320D2G
Propeller: Mcauly 1C160DTM
System (JASC): 2421 · AC Generator-Alternator
Part: Alternator
Part number: 10300B
Part serial: 96082898
Condition: Failed
Location: Engine
Stage of operation: CR
How discovered: O
Nature of condition: H, J
Precautionary procedure: A

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

What was found

IN CRUISE, THE PILOT NOTICED THAT THE ALTERNATOR FAILED. DECIDED TO LAND AT THE NEAREST AIRPORT. ON SITE, NOTICED THAT THE ALTERNATOR GROUND WIRE WAS CUT AND WAS CONTACTING THE POSITIVE WIRE, WHICH IN TURN CAUSED THE CONTROL BOX TO FAIL. REPLACED THE ALTERNATOR, THE VOLTAGE REGULATOR AND ALL THE ELECTRICAL CONNECTIONS, AIRCRAFT SERVICEABLE.

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