SDR SWAA2021071580038

Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date: June 4, 2021
Submitted: July 15, 2021
Operation: Air carrier
Aircraft: N489WN
Make and model: Boeing 7377H4
Aircraft serial: 33855
Aircraft time: 54,253 hours, 32,244 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Condition: Failed
Location: Cabin
Stage of operation: IN
How discovered: 9
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 LIGHTING BATTERY M1674 FAILS CAPACITY TEST. / [01] REMOVED AND REPLACED EMERGENCY LIGHTING BATTERY PACK M1674 PER AMM 33-51-06-960-805 STEPS 4. D. (1)-(4); [02] VERIFIED INSTALLATION OF EMERGENCY LIGHTING BATTERY PACK M1674 PER AMM 33-51-06-960-805 STEPS 4. D. (1)-(4; [03] PERFORMED GOOD INSTALLATION TEST OF EMERGENCY LIGHTING BATTERY PACK M1674 PER AMM 33-51-06-960-805 4. D. (5); [04] VERIFIED GOOD INSTALLATION TEST OF EMERGENCY LIGHTING BATTERY PACK M1674 PER AMM 33-51-06-960-805 4. D. (5)

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