# SDR USAA2013061300001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 12, 2013
- Submitted: June 13, 2013
- Operation: Air carrier
- Aircraft: N936UW
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27244
- Aircraft time: 61,991 hours, 24,583 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 20121
- Part serial: 3183
- Condition: Failed
- Location: Cabin
- 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/USAA2013061300001

## Discrepancy

C4 CHECK - THE FOLLOWING EMERGENCY LIGHTS FAILED THE OPS CHECK: AISLE LIGHTS AT ROW 1 RT, ROW 3 RT, ROW 4 LT, ROW 11 RT, ROW 13 LT, 17 LT, ROW 8 RT & ROW 25 RT, R1 DOOR SLIDE LIGHT & R2 & L2 DOOR SLIDE LIGHT.  COMPLETED TROUBLESHOOTING OF EMERGENCY LIGHTS & FOUND DEFECTIVE BATTERY POWER SUPPLY M730.  REPLACED BATTERY POWER SUPPLY M730 IAW WDM 33-51-21 & 33-51-07.  OPS CHECK GOOD.

---
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.