# SDR CALA2024121901577

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2024
- Submitted: December 19, 2024
- Operation: Air carrier
- Aircraft: [N21723](https://openairdocs.org/aircraft/N21723), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28790FAL
- Aircraft time: 79,214 hours, 27,936 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: No Test
- Location: Zone 200
- 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/CALA2024121901577

## Discrepancy

EMERGENCY LIGHTS AT ISLE 12-21 ARE INOP REPLACED POWER SUPPLY M1669, EMERGENCY LIGHTS OPS CHECKS GOOD. REF WDM 33-51-21 AND AMM 33-51-06

---
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.