Service difficulty report · Relay · Boeing 767322

Difficulty date
August 4, 2023
Submitted
August 7, 2023
Operation
Air carrier
Aircraft
N649UA
Make and model
Boeing 767322
Aircraft serial
25286
Aircraft time
122,443 hours, 18,948 cycles
Part
Relay
Part number
KAD9F005
Condition
Damaged
Location
P19 Panel
Stage of operation
CL
How discovered
V
Nature of condition
B
Precautionary procedure
A

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

What was found

ELETRICAL BURNING ODOR FROM FWD GALLEY/FWD PORTION OF FIRST CLASS 10 MINUTES INTO FLIGHT. PERFORMED CONDITIONAL INSPECTION IAW AMM 05-51-56-940-801-C1. FOUND SIDEWALL LIGHT BALLAST AT SEAT 1A TO BE SOURCE OF ELEC ODOR. NEEDS BALLAST 76-3321-3-0013. R+R BALLAST M745, NO HELP. T/S FURTHER, FOUND PIN 7 AT CONNECTOR D5110P BURNED, SUSPECT RELAY K365 FAILURE, RESULTING IN BURNED PIN, REF WDM 33-21-31 SHEET 2B. R+R RELAY S365. ALSO FOUND HIGH RESISTANCE ACROSS TERMINALS OF SWITCH S9102. RETERMINATED WIRES, LIGHTS NOW OPS CHECK GOOD. STILL NEED CONNECTOR D5110P. UPDATING FOR ''SDR'' RPL CONNECTOR D5110P, NO DEFECTS FOUND ON PINS. REF WD 33-21-32-1A, 33-21-31 AND SWPM 20-61-11. FIRST CLASS LIGHTS OP NORMAL AND 1A SIDEWALL LIGHT OVERHEAD TOGGLE SWITCH OPS NORMAL. NO ABMORMAL SMELLS ABOVE FIRST CLASS CEILING AREA. CLOSED CEILING PANELS.