Service difficulty report · Power Supply · Boeing 747422

Difficulty date
February 24, 2017
Submitted
February 25, 2017
Operation
Air carrier
Aircraft
N116UA
Make and model
Boeing 747422
Aircraft serial
26908
Aircraft time
71,974 hours, 8,054 cycles
Part
Power Supply
Condition
Faulty
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 SIDE UPPER OVERWING EMERGENCY LIGHTS 2EA LIGHTS (L1698 & L813) FAILED TO ILLUMINATE DURING EMERGENCY LIGHTS TEST. "A" CHECK JOB CARD 74-3351-1-7105, SSM 33-51-04 PG 103 SHT 1 & WDM 33 -51-41- PG 1 SH 1. AMM 33-51-03. TS PER WDM 33-51-41 PG 1 SHT 1. NR 6VDC POWER AT PIN 15 CONNECTOR DM7920J AT POWER SUPPLY (M7920). REPLACED POWER SUPPLY AND OPS CHECKED GOOD REF 33-51-04/201.