# SDR AALA20180121007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2018
- Submitted: February 6, 2018
- Operation: Air carrier
- Aircraft: [N781AN](https://openairdocs.org/aircraft/N781AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29586
- Aircraft time: 71,615 hours, 8,669 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Part serial: 60178
- Condition: Inoperative
- Location: Cabin
- Part time: 71,615 hours, 8,669 cycles
- 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/AALA20180121007

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: MOUNTED EMERGENCY LIGHT ABOVE SEAT 17H AFT WAS INOPERABLE. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-06-906-803 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.