# SDR CALA2026061617129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2026
- Submitted: June 17, 2026
- Operation: Air carrier
- Aircraft: [N57111](https://openairdocs.org/aircraft/N57111), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27301
- Aircraft time: 117,295 hours, 24,860 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 20121
- Condition: Faulted
- Location: Zone 200
- 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/CALA2026061617129

## Discrepancy

EMERGENCY LIGHTS - OPERATIONAL TEST WITH THE TEST SWITCH PROCEDURE - LT AFT OVERWING LIGHT INOPERATIVE TROUBLESHOT SYS PER WDM 33-51-13, REMOVED AND REPLACED POWER SUPPLY M10954 PER AMM 33-51-07/201 AND PERFORMED OPERATIONAL CHECK OF LEFT AFT OVERWING EMERGENCY LIGHT L562 WITH NO DEFECTS.

---
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.