# SDR ASAA2025052259036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2025
- Submitted: June 30, 2025
- Operation: Air carrier
- Aircraft: [N492AS](https://openairdocs.org/aircraft/N492AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44110
- Aircraft time: 35,515 hours, 11,001 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- 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/ASAA2025052259036

## Discrepancy

4 EMERGENCY LIGHT BATTERIES FAILED 15 MINUTE TIMER CHECK. GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERG LIGHT BATTERIES S/N 420477, 408193, 407875 AND 420479. OP CHECKS GOOD IAW B737-900 AMMM 33-51-06-960-805.

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