Service difficulty report · Battery Pack · Boeing 7378H4

Difficulty date
November 9, 2025
Submitted
November 12, 2025
Operation
Air carrier
Aircraft
N8577Z
Make and model
Boeing 7378H4
Aircraft serial
64350
Aircraft time
24,255 hours, 12,589 cycles
Part
Battery Pack
Condition
Inoperative
Location
Zone 200
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 BATTEY PACKS M1670; M1672; M1673; AND M1675 DO NOT OPERATE. REMOVED AND REPLACED EMERGENCY BATTERY PACKS AND PERFORMED A GOOD EMERGENCY EXIT LIGHT TEST IAW AMM 33-51-06-960-805.

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