# SDR SWAA2021110423986

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2021
- Submitted: November 4, 2021
- Operation: Air carrier
- Aircraft: N557WN
- Make and model: Boeing 737*
- Aircraft serial: 30166
- Aircraft time: 66,485 hours, 32,340 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/SWAA2021110423986

## Discrepancy

M1670 EMERGENCY LIGHT BATTERY FAILED CAPACITY TEST ; / [01] REMOVED AIR RETURN GRILL AT STA 727C+13 LBL 68 PER CMM 25-23-01 PARA. 1.2 AND REMOVED M1670 EMERGENCY BATTERY AND REPLACED WITH SERVICEABLE BATTERY PER AMM 33-51-06-960-805 STEP 4.D.(1)-(5); [02] VERIFIED CORRECTIVE ACTIONS STEP 1.; [03] OK TO CLOSE GIVEN.; [04] REINSTALLED AIR RETURN GRILL AT STA 727C+13 LBL 68 PER CMM 25-23-01 PARA. 1.3 AND PERFORMED GOOD INSTALLATION TEST OF M1670 EMERGENCY BATTERY PER AMM 33-51-06-960-805 STEP 4.D.(6); [05] VERIFIED CORRECTIVE ACTION STATEMENT 4

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