Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date
June 16, 2024
Submitted
June 19, 2024
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
66,413 hours, 39,649 cycles
Part
Battery Pack
Part number
UNKNOWN
Condition
Inoperative
Location
Emergency Lights
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

DURING EMERGENCY LIGHTS TEST; FOUND INOP ALL EMERGENCY LIGHTS COMMON TO BATTERY PACK M1670.<[01] REMOVED AND REPLACED EMERGENCY BATTERY PACK (M1670) AND TESTED GOOD PER AMM 33-51-06-960-805.;[02] VERIFIED REMOVAL / REPLACEMENT AND PERFORMED GOOD FUNCTIONAL TEST OF EMERGENCY BATTERY PACK (M1670) PER AMM 33-51-06-960-805.;[03] UPDATED MEASUREMENTS TABLE.;[04] VERIFIED;[05] VERIFIED CORRECTIVE ACTION STEPS 1-3. TASK CARD COMPLETE.

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