# SDR ASAA2024021247841

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2024
- Submitted: February 15, 2024
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 42,013 hours, 13,100 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Malfunctioned
- Location: Emergency Lights
- Stage of operation: TO
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2024021247841

## Discrepancy

AT TAKE OFF AND FOR 1 MINUTE AFTER T/O THEEMERGENCY LIGHTS AT THE R1 DOOR AND A/C RIGHT SIDE FIRST CLASS CABIN CAME ON. NO ABNORMAL FLIGHT DECK INDICATIONS. GROUNDED - YES. REF TSR715602 FOR REPLACEMENT OF PWR SUPPLY AND BATTERY.

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