Service difficulty report · Battery · Boeing 777222

Difficulty date
December 7, 2025
Submitted
December 12, 2025
Operation
Air carrier
Aircraft
N779UA
Make and model
Boeing 777222
Aircraft serial
26941
Aircraft time
102,921 hours, 19,298 cycles
Part
Battery
Condition
Inoperative
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

L1 DOOR NEEDS EPAS BATTERY PACK REINSTALLED REF 52-11-20-400-813. INSTALLED EPAS BATTERY PACK ON DOOR 1L UP TO STEP 5 G(3)(E), AMM 52-11-20-400-814. EPAS BATTERY OPS TEST FAILED IAW AMM 52-11-20-700-812. AMBER SQUIB CONTINUITY TEST LIGHT WOULD NOT ILLUMINATE AT STEP F.1.F. PERFORMED EPAS TEST AMM 52-11-20-700-81. AMBER SQUIB CONTINUITY TEST LIGHT WOULD COME ON WITH SPL-2000 SHORTED. PREFORMED OPS CHECK & AMBER LIGHT DOES NOT ILLUMINATE IAW AMM 52-11-20-700-812. GMM 09-25-05. INSTALLED SQUIB IAW AMM: 52-11-22-400-803. INSTALLED SLIDE SAFTEY PINS & PERFORMED EMERGENCY EPAS BATTERY OPS TEST AND IAW AMM 52-11-20-700-812. REMOVED & STOWED SLIDE SAFTEY PINS & RETURNED DOOR TO ITS USUAL CONDITION IAW AMM 52-11-20-700-812 VERIFIED SLIDE SAFETY PINS REMOVED AND STOWED IN SLIDE POUCH AND REINSTALLATION OF DOOR 1L SLIDE BUSTLE. GMM 09-25-05.