# SDR ASAA2023071844122

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2023
- Submitted: July 20, 2023
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 30,098 hours, 9,454 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Inoperative
- Location: Main 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/ASAA2023071844122

## Discrepancy

EMERGENCY EXIT SIGN LIGHT OUT CENTER AISLE. GROUNDED - YES. REPLACED CENTER AISLE EMERGENCY EXIT LIGHT ASSY PER AMM 33-51-01. OPS CHK FAILED BLONG 07/19/2023 REMOVED AND REPLACED POWER SUPPLY M1695 REF AMM 33-51-06-960-806. 1 C/B OPENED, TAGGED, AND RESET. ALL OP TESTS PASS. CENTER AISLE EMERGENCY EXIT SIGN ASSY L1070 OP TEST PASS.

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