Service difficulty report · Wire · Cessna 402C

Difficulty date
May 12, 2025
Submitted
May 15, 2025
Operation
Air carrier
Aircraft
N494BC
Make and model
Cessna 402C
Aircraft serial
402C0308
Aircraft time
39,395 hours, 26,339 cycles
Engine
Cont TSIO520VB
Engine time
9,264 hours, 3,811 cycles
Part
Wire
Condition
Shorted
Location
Alternator
Stage of operation
TX
How discovered
O
Nature of condition
Z
Precautionary procedure
D

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

What was found

PILOT REPORTED LEFT ENGINE CYLINDER TEMP INDICATIONS WERE IN THE RED ON TAXI OUT. MAINTENANCE INSPECTED AND FOUND THE POSITIVE WIRE TO THE ALTERNATOR SHORTED INTO THE ADEL CLAMP AT THE CROSSOVER BEAM. THIS CAUSED DAMAGE TO THE SURROUNDING WIRE HARNESS AND HOSES. REPAIRS ARE IN PROCESS.

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