# SDR ASAA2023101945743

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2023
- Submitted: October 20, 2023
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 32,099 hours, 9,864 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023101945743

## Discrepancy

WHILE ACCOMPLISHING TASK CARD 78233001 LIGHTS AROUND THE L1 DOOR AND LEFT AFT OVERWING EXIT WENT OUT (EMERGENCY EXIT LIGHTS). GROUNDED - YES. REMOVED AND REPLACED BATTERIES FOR EMERGENCY EXIT LIGHT AT M1670 AND M1675 REF AMM 33-51-06-960-805, 2 C/B'S OPENED, TAGGED, AND RESET. ALL OP TESTS PASS.

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