Service difficulty report · Module · Boeing 777222

Difficulty date
October 26, 2012
Submitted
November 9, 2012
Operation
Air carrier
Aircraft
N786UA
Make and model
Boeing 777222
Aircraft serial
26938
Aircraft time
68,661 hours, 9,873 cycles
Engine
Pwa PW40903
Part
Module
Part number
ELM58
Part serial
72
Condition
Faulty
Location
Electrical Sys
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

ELMS P110 CHANNEL ONE, BUT NOT BOTH, OF THE ELECTRICAL LOAD MANAGEMENT SYSTEM (ELMS) P110 PANEL CHANNELS ARE FAULT-DUE TO DF564 ON CHA A. SWAPED 629 CARD BETWEEN CHANNEL A AND B WITH FAULT FOLLOWS, RETURNED CARD TO ORIGINAL, REPLACED A3 CARD WITH ROBBED CARD AND ALSO REPLACED POWER SUPPLY CARD A1. STILL SHOWS POWER SUPPLY FAULT. REF FIM 24-09 TASK 804 AND AMM-24-09-00-201. CHASSIS ON STASH (BULK AREA). SECURED A3 CARD IN P110 PANEL DUE TO NOT BEING FULLY SEATED, MESSAGES CLEARED, REF MM 24-09-00. ()ABOVE SHOULD READ A2 SECURED. DUE TO DF564 ON CHA A. SWAPPED A1 AND A15 CARDS PER MM AND TESTED NORMALLY. MSG NOW NOT ACTIVE.