# SDR ASAA2025020355751

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 3, 2025
- Submitted: February 6, 2025
- Operation: Air carrier
- Aircraft: [N479AS](https://openairdocs.org/aircraft/N479AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60576
- Aircraft time: 34,119 hours, 10,521 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71702001
- 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/ASAA2025020355751

## Discrepancy

EMERGENCY LIGHT SYSTEM BATTERY PACK M2335 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT SYSTEM BATTERY PACK M2335 S/N 124366 IAW B737-900 AMM 33-51-06-960-806. OPS CK GOOD.

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