Service difficulty report · Battery · Boeing 777224

Difficulty date
March 20, 2025
Submitted
March 21, 2025
Operation
Air carrier
Aircraft
N78002
Make and model
Boeing 777224
Aircraft serial
27578
Aircraft time
119,151 hours, 12,502 cycles
Part
Battery
Condition
Discharged
Location
Epas
Stage of operation
IN
How discovered
V
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

EMERGENCY POWER ASSIST SYSTEM (EPAS) 9 VOLT BACK-UP BATTERY INSTALLATION BACKUP 9-VOLT BATTERY INSTALLATION - FOUND RED WIRE BROKEN DURING EPAS OPERATIONAL CHECK. AMBER LIGHT WILL NOT ILLUMINATE. REPLACED SPLICE CONNECTION REF AMM 20-30-12 PG 546.