# SDR ASAA2025091662033

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2025
- Submitted: November 5, 2025
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 35,108 hours, 10,848 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/ASAA2025091662033

## Discrepancy

FCF INDUCTION FLIGHT DISC 12 - AFTER RIGHT SECTION OF EMERGENCY EXIT LIGHTS INOP ROW 17FED THROUGHJ ROW 29FED. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY BATTERY PACK RIGHT SECTIN AT EXIT LIGHTS ROW 17FED THROUGH 29FED IAW B737-900 AMM 33-51-06-960-805. PERFORMED OPS CHECK GOOD. (S/N 412880)

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