Service difficulty report · Circuit Breaker · Boeing 7572B7

Difficulty date
November 26, 2018
Submitted
November 29, 2018
Operation
Air carrier
Aircraft
N903FD
Make and model
Boeing 7572B7
Aircraft serial
27124
Aircraft time
55,860 hours, 25,436 cycles
Part
Circuit Breaker
Condition
Tripped
Location
Cockpit
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

AFTER TROUBLE SHOOTING FINISHED THE LDG ALT EXT C/B POPPED OUT AGAIN DURING T/S FOUND "ALT GEAR EXTENSION CONT" C/B FAULT , C/B SWAPPED CB C41177 WITH CB C00773, P006-01//H006 CB-BTL 2 CARGO FIRE EXTINGUISHING T/S REF WDM 32-12-12, 32-12-11 & 32-35-11 AND FOUND SHORT CB TO USERS, SHORT CONFIMED FROM PIN 31 OF D42018P. FOUND WIRE SHORTED(W2516-1018-18) AT SPLICE SP1246. NEED TO CUT SHORT AT WIRE(1 INCH) AND RESPLICE ALL WIRES(W2516-2520R-18,

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