# SDR SWAA2021112346004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2021
- Submitted: November 23, 2021
- Operation: Air carrier
- Aircraft: N780SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27885
- Aircraft time: 68,861 hours, 40,837 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Failed
- Location: Cabin
- Stage of operation: UK
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021112346004

## Discrepancy

M1674 BATTERY PACK FAILS CAPACITY TEST ; / [01] REMOVED AND REPLACED M1674 BATTERY PACK PER AMM 33-51-06-960-805 STEP 4.A. THROUGH 4.D.(6)(A); [02] REMOVED AND REPLACED M1674 POWER SUPPLY AS PER AMM. TASK 33-51-06-960-806 5.E.(1-4); [03] M1674 REQUIRES CHARGING TIME OF 180 MINUTES. POWER ON AND CHARGING START AT 13:15 HRS AS PER AMM. 33-51-06-960-805 D.6.B.2; [04] VERIFIED CORRECTIVE ACTION ENTRIES 2. AND 3.; [05] VERIFIED INSTALLATION OF M1674 POWER SUPPLY PER AMM 33-51-06-960-806 AND REPLACED M1674 BATTERY AND; CHARGED BATTERIES FOR 180 MINUTES; AND PERFORMED SATISFACTORY INSTALLATION TEST PER AMM 33-51-06-960-805; NO DEFECTS NOTED.; [06] VERIFIED CORRECTIVE ACTION ITEM 5.

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