Service difficulty report · Unknown · Boeing 777222

Difficulty date
March 7, 2012
Submitted
March 29, 2012
Operation
Air carrier
Aircraft
N228UA
Make and model
Boeing 777222
Aircraft serial
30556
Aircraft time
42,980 hours, 5,240 cycles
Engine
Pwa PW40903
Part
Unknown
Condition
Malfunctioned
Location
Electrical Sys
Stage of operation
IN
How discovered
O
Nature of condition
J
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 PANEL THE ELECTRICAL LOAD MANAGEMENT SYSTEM (ELMS) P110 PANEL IS FAULTED SUCH THAT IT CANNOT SUPPORT AIRPLANE DISPATCH. AIMS HAS LOST ARINC 629 COMMUNICATION WITH THE P110 PANEL. ONE P110 PANEL CHANNEL IS INOP AND THE OTHER IS FAULTED AND IS OPERATING IN A DEGRADED MODE. BOTH P110 PANEL CHANNELS ARE FAULTED AN STATUS MSG01- ACTIVE DESCENT HARD; ELMS P110 - POWER MANAGEMENT PANEL - (LEFT) HAS NO OUTPUT ON ANY BUS. MSG-2418801 ACTIVE DC HARD. MAT MSG 18801 FOUND ACTIVE. ACCOMPLISHED MAINT TIP MT24-023 R3 AND CYCLED BREAKERS J24 AND P15 AT P110 AND J3 AND J6 AT P210, MSG NOT ACTIVE AND ALL STATUS MSG ERASED.