# SDR CALA2026100520057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2026
- Submitted: October 5, 2026
- Operation: Air carrier
- Aircraft: [N37516](https://openairdocs.org/aircraft/N37516), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43454
- Aircraft time: 19,254 hours, 6,381 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- 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/CALA2026100520057

## Discrepancy

EMERGENCY LIGHTS IN OVERHEAD AT SEATS 29DEF AND 34DEF WILL NOT TEST.   REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY AT M3379 IAW AMM 33-51-06. OPS CHKD 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.