# SDR ASAA2025022556541

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2025
- Submitted: March 12, 2025
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 38,181 hours, 11,907 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: ADD71701100
- Condition: Inoperative
- 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/ASAA2025022556541

## Discrepancy

EMERGENCY LIGHT BATTERY AT ROW 27 (IN THE CEILING) WILL NOT HOLD A CHARGE. GROUNDED - YES. REMOVED AND INSTALLED SERVICABLE EMERGENCY LIGHTS BATTERIES ROW 22R AND 27R IAW B737-900 AMM 33-51-06-960-805, 25-21-45-000-803-001, 25-21-45-400-801, 21-23-03-000-801, AND 21-23-03-400-802. (S/N 306633)

---
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.