Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date
July 7, 2026
Submitted
July 29, 2026
Operation
Air carrier
Aircraft
N494WN
Make and model
Boeing 7377H4
Aircraft serial
33868
Aircraft time
70,566 hours, 42,592 cycles
Part
Battery Pack
Condition
Faulted
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 LIGHTS RUN OFF OF BATTERY PACK M1673, DID NOT TURN ON. REMOVED AND REPLACED THE BATTERY PACK IAW AMM 33-51-06-960-805.

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