# SDR ASAA2023042142978

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2023
- Submitted: April 24, 2023
- Operation: Air carrier
- Aircraft: [N290AK](https://openairdocs.org/aircraft/N290AK), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 64300
- Aircraft time: 16,676 hours, 5,264 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Discharged
- Location: Main Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023042142978

## Discrepancy

DURING EMERGENCY BATTERY PACK FUNCTIONAL CK AFT COVE EMERGENCY LIGHTS WOULD NOT ILLUMINATE (L1521). GROUNDED - YES. REMOVED & REPLACED BATTERY PACK & POWER SUPPLY M1672 REF B737-900 AMM 33-51-06. OPS CK 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.