Service difficulty report · Light · Boeing 777222

Difficulty date
March 4, 2026
Submitted
March 5, 2026
Operation
Air carrier
Aircraft
N213UA
Make and model
Boeing 777222
Aircraft serial
30219
Aircraft time
83,127 hours, 17,718 cycles
Part
Light
Part number
D71702030
Condition
Shorted
Location
Zone 200
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 LIGHTS - OPS TEST WITH TEST SWITCHES PROCEDURE, MULTPLE LIGHTS ASSOCIATED WITH POWER SUPPLY M33094 INOPERATIVE. FOUND POWER SUPPLY M33094 FUSE F3 OPEN, REPLACED POWER SUPPLY AS A PRECAUTION IAW AMM 33-51-06-960-803, ON FOLLOW UP TEST, CONDITION SAME. SLAVED IN KNOWN WORKING BATTERY PACK IAW AMM 33-51-06-960-802, CONDITION SAME. OPENED R1 DOOR OVERHEAD PANEL & FIRST CLASS FWD OTBD RT CEILING PANEL TO ACCESS WIRING, PLUS DISCONNECTED FIRST CLASS SEAT EMERGENCY LIGHT HARNESSES & LIGHTS TO FACILITATE LOCATING POSSIBLE SHORT IN WIRING FROM PIN 14 OF POWER SUPPLY M33094. FOUND SEAT 1CD EMERGENCY LIGHT MODULE. REROUTED & SECURED WIRE W6171-0012-16 AWAY FROM INDUCTANCE CABLE TO PROPER ROUTING. BOTH WIRES AT EMERGENCY LIGHT MODULE ASSY. SHORTED INSIDE MOUNTING BRACKET. REMOVED AND REPLACED SEAT 1CD LEMERGENCY LIGHT MODULE ASSY.