# SDR AALA2020062549026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2020
- Submitted: June 25, 2020
- Operation: Air carrier
- Aircraft: [N779AN](https://openairdocs.org/aircraft/N779AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29955
- Aircraft time: 84,951 hours, 10,113 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Part serial: 118803
- Condition: Inoperative
- Location: Cabin
- 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/AALA2020062549026

## Discrepancy

AIRCRAFT NOT GROUNDED, EMERGENCY LIGHTS AT L3 & R3 INOPERATIVE DURING INTERIOR CHECK.  REMOVED AND REPLACED EPSU (EMERGENCY POWER SUPPY UNIT) M33406, PER AMM 33-51-06, OPERATIONAL CHECK NORMAL. [SEE SDR# AALA202006249027 FOR ADDITIONAL PARTS REPLACED.]

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