Service difficulty report · Battery Pack · Boeing 777222

Difficulty date
July 1, 2025
Submitted
July 7, 2025
Operation
Air carrier
Aircraft
N204UA
Make and model
Boeing 777222
Aircraft serial
28713
Aircraft time
107,380 hours, 14,007 cycles
Part
Battery Pack
Part number
285W0955102
Part serial
D02334
Condition
Faulted
Location
Zone 200
Part time
86,669 hours, 8,338 cycles
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

FOUND MED 4R EPAS GREEN LIGHT NOT BLINKING WHEN IN ARMED POSITION. REF. AMM 52-11-00. RESETTED CB AT P11 H 18. 4L EPAS GREEN FLASHING AND 4R NOT FLASHING. REMOVED AND REPLACED EMERGENCY POWER ASSIST SYSTEM (EPAS) BATTERY PACK REFERENCE: TASK 52-11-20-400-813. OPS CHK GOOD. REQUIRES INSPECTION BUY BACK FOR INSTALLATION, REMOVAL OF SLIDE SAFETY PINS, AND OPENING AND CLOSING OPS CHK REFERENCE: TASK 25-66-01-820-801. OK FOR SERVICE. ACP'D RII INSPECTION, VERIFIED DR.4R ESCAPE SLIDE SAFETY PINS REMOVED AND STOWED, SLIDE BUSTLE INSTALLED, OP-CHKD GOOD.