Service difficulty report · Power Supply · Boeing 747422

Difficulty date
June 22, 2012
Submitted
August 1, 2012
Operation
Air carrier
Aircraft
N121UA
Make and model
Boeing 747422
Aircraft serial
29167
Aircraft time
55,175 hours, 6,483 cycles
Engine
Pwa PW4056
Part
Power Supply
Part number
20131A
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

EMERGENCY EXIT LIGHTS INOP LEFT EXTERIOR OVERWING 2 EA MOST FWD LIGHT ASSEMBLIES. REPLACED POWER SUPPLY AT DOOR 3L PER MM.