Service difficulty report · Battery Pack · Boeing 777323ER

Difficulty date
February 1, 2026
Submitted
February 2, 2026
Operation
Air carrier
Aircraft
N721AN
Make and model
Boeing 777323ER
Aircraft serial
31546
Aircraft time
51,994 hours, 5,995 cycles
Part
Battery Pack
Part number
BPAS105
Part serial
2046
Condition
No Test
Location
Zone 200
Part time
12,401 hours, 1,437 cycles
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

AIRCRAFT WAS NOT GROUNDED: 3L DOOR RED BATTERY PACK TEST INDICATOR LIGHT DID NOT COME ON. REMOVED AND REPLACED 3L DOOR RED BATTERY PACK. PER AMM 52-12-19.