# SDR ASAA2023020642032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2023
- Submitted: February 22, 2023
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 44,922 hours, 13,005 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71701100
- Condition: Unknown
- Location: Main Cabin
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023020642032

## Discrepancy

AFT EXTERIOR OVERWING EMERGENCY LIGHT FAILS TO STAY ILLUMINATED FOR 15 MINUTES. GROUNDED - YES. REPLACED AFT EXTERIOR OVERWING EMERGENCY LIGHT BATTERY PACK S/N 474070 WITH SERVICEABLE BATTERY PACK, OPS CHECK GOOD, IAW B737-800 AMM 33-51-06-960-805.

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