# SDR ASAA2020072212922

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2020
- Submitted: July 22, 2020
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 27,729 hours, 8,919 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020072212922

## Discrepancy

EMERGENCY LIGHTS COMMON TO POWER SUPPLY M1672 WERE INOPERATIVE.  GROUNDED - YES.  REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY M1672 IAW AMM 33-51-06-960-806. INSTALLATION TEST GOOD.

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