Service difficulty report · Power Supply · Boeing 747422

Difficulty date
May 1, 2014
Submitted
May 2, 2014
Operation
Air carrier
Aircraft
N127UA
Make and model
Boeing 747422
Aircraft serial
28813
Aircraft time
58,478 hours, 6,768 cycles
Engine
Pwa PW4056
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

RIGHT OVERWING EEL LIGHTS OUT, 4 EACH. CHANGED THE PACK WHEN ONLY THE TOP TWO WERE OUT. NOW NONE OF THE FOUR LIGHTS WILL RUN. REPLACED POWER SUPPLY M79 20 IAW SSM 33-51-04.