Service difficulty report · Control Unit · Boeing 777222

Difficulty date
December 28, 2010
Submitted
December 30, 2010
Operation
Air carrier
Aircraft
N228UA
Make and model
Boeing 777222
Aircraft serial
30556
Aircraft time
37,594 hours, 4,590 cycles
Engine
Pwa PW4090
Part
Control Unit
Condition
Faulty
Location
Elec Load
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

WHILE TS LOG ITEM ELMS P110 PANEL CMC AND STATUS MESSAGE FOUND MSG 24-11061 IN EXISTING FAULT AND FAULT HISTORY, ALSO LATCH ON. UNABLE TO RESET IAW FIM, CYCLE CB NO HELP. IT DOES NOT SEEM THE CB HAS ANY EFFECT ON L-UTILITY BUSS IAW FIM NEED ELCU M24111. SWAPPED SAME FOR T/S FAULT CLEARED & OPS CHECK OK, RETURNED ELCU & SYS TO NORMAL & ORIGINAL POSITIONS FAULT RETURNS, REPLACED "ELCU-M24111" IN P100 IAW MM, MESSAGE CLEARED OK ON UNDER MAT "EXT EXISTING FAULTS".