Service difficulty report · Power Supply · Boeing 747451

Difficulty date
December 11, 2011
Submitted
December 12, 2011
Operation
Air carrier
Aircraft
N669US
Make and model
Boeing 747451
Aircraft serial
24224
Aircraft time
919,661 hours, 11,270 cycles
Engine time
1,270 hours
Part
Power Supply
Condition
Inoperative
Location
Cabin
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

DURING A MAINTENANCE VISIT, TWO OVERWING EMERGENCY LIGHTS ON THE RIGHT SIDE WERE FOUND TO BE INOPERATIVE. MAINTENANCE REPLACED THE POWER SUPPLY, F4 FUSE AND THE RIGHT FORWARD EMERGENCY EXIT LIGHT ASSEMBLY. SYSTEM OPERATION WAS NORMAL AFTER THE POWER SUPPLY, FUSE AND LIGHT ASSEMBLY WERE REPLACED.