# SDR SWAA2019040331295

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2019
- Submitted: April 3, 2019
- Operation: Air carrier
- Aircraft: N7839A
- Make and model: Boeing 737-73V
- Registry model: [Boeing 737-73V](https://openairdocs.org/model/boeing-737-73v) (OpenAirDocs)
- Aircraft serial: 30243
- Aircraft time: 52,255 hours, 32,042 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Control Unit
- Part number: 762187F
- Part serial: AAA70030008
- Condition: Failed
- Location: Cabin
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2019040331295

## Discrepancy

EMERGENCY EXIT LIGHTS FAILED TO ILLUMINATE WHEN TESTED.  R&R BUS POWER CONTROL UNIT PER AMM.

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