Service difficulty report · Wire · Cessna 182S

Difficulty date
November 11, 2008
Submitted
April 9, 2009
Operation
General aviation
Make and model
Cessna 182S
Aircraft time
1,412 hours
Engine
Lyc IO540AB1A5
Propeller
Mcauly B3D36C431
Part
Wire
Condition
Damaged
Stage of operation
TX
How discovered
O
Nature of condition
H
Precautionary procedure
O

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

What was found

(CAN) DURING MASTER SWITCH SELECTION TO ON, NO POWER WAS OBSERVED ANYWHERE IN ACFT. TROUBLESHOT A FEW TIMES, EVERY TIME, WHEN MX TRIED TO DUPLICATE SNAG, UNABLE TO FAULT. FINALLY, WAS ABLE TO FAULT, FOUND THAT BUSS (BUS) TIE STRAP FROM ALTERNATOR CONTACTOR (SOLENOID) TO THE TOP START OF BOTH CIRCUIT BREAKERS WERE PRE-LOADED TO APPLY A PRESSURE TO PULL THE STUDS AWAY FROM THE BREAKERS. THIS ALLOWED THE CIRCUIT BREAKERS TO SEPARATE AT THE DESIGNED SPLIT IN THE BREAKER WHICH STOPPED THE BREAKER FROM FUNCTIONING PROPERLY AND THUS NOT ALLOWING CURRENT TO FLOW THROUGH THE BREAKER TO THE ACFT BUSES.

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