# SDR ASAA2023120446510

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2023
- Submitted: December 5, 2023
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 38,042 hours, 11,957 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: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023120446510

## Discrepancy

PER T/C 78233008 EMERGENCY LIGHTS ARE INOP AT ROW 4, 9, AND 13. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY BATTERY POWER SUPPLY M1676 PER WDM 33-51-12-4 OPS TEST GOOD AT ROW 4, 9 AND 13.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.