Service difficulty report · Battery Pack · Boeing 777300ER

Difficulty date
October 22, 2025
Submitted
October 23, 2025
Operation
Air carrier
Aircraft
N2331U
Make and model
Boeing 777300ER
Aircraft serial
62642
Aircraft time
37,121 hours, 4,033 cycles
Part
Battery Pack
Part number
ADD71701100
Condition
No Test
Location
Zone 200
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

EMERGENCY EXIT LIGHTS TURNED ON IN THE AIR. FLASHING INTERMITTANTLY. REPLACED FWD EMERGENCY BATTERY M33093 ABOVE DOOR L1. REPLACED AFT EMERGENCY BATTERY M33098 ABOVE DOOR R2 ALL EMERGENCY LIGHTS GROUND TEST PASSED.

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