Service difficulty report · Circuit Breaker · Cessna 172M

Difficulty date
July 1, 2007
Submitted
August 3, 2007
Operation
General aviation
Aircraft
N80213
Make and model
Cessna 172M
Aircraft serial
17266449
Engine
Lyc O320*
Part
Circuit Breaker
Part number
S159660L
Condition
Failed
Location
Cockpit
Stage of operation
IN
How discovered
9
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

PILOT STATED SMOKE IN COCKPIT. INSPECTION REVEALED ALTERNATOR OUTPUT C/B FAILED, ALTERNATOR HAD BROKEN AND LOOSE PARTS INTERNALLY, AND VOLTAGE REGULATOR FAILED. OPENED C/B AND FOUND INTERNAL PARTS HAD MELTED CAUSING SMOKE. NO SIGNS OF WIRE OVERHEATING, OR SECONDARY DAMAGE WAS FOUND. (K)

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