# SDR SWAA2020070797644

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2020
- Submitted: July 7, 2020
- Operation: Air carrier
- Aircraft: N741SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29277
- Aircraft time: 74,277 hours, 44,107 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulty
- Location: Emergency Lights
- Stage of operation: IN
- 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/SWAA2020070797644

## Discrepancy

EMERGENCY LIGHTS ASSOCIATED WITH M1674 BATTERY CHARGER GO OUT 20 SECONDS AFTER EMERGENCY LIGHT SWITCH IS TURNED ON.   REMOVED, REPLACED, AND PERFORMED A GOOD FUNCTIONAL TEST OF M1674 POWER SUPPLY IAW AMM 33-51-06-960-806, STEP 5.E. 1, 2A, 3, 4A, B, 1C,  AND 5A.

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