# SDR AALA202010229006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2020
- Submitted: October 22, 2020
- Operation: Air carrier
- Aircraft: [N913US](https://openairdocs.org/aircraft/N913US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6255
- Aircraft time: 20,645 hours, 8,016 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 146664
- Condition: Inoperative
- Location: Emergency Lights
- Part time: 20,645 hours, 8,016 cycles
- 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/AALA202010229006

## Discrepancy

AIRCRAFT WAS GROUNDED.  EMERGENCY POWER SUPPLY UNIT TEST FAILED UNIT 14WL, 15WL AND DECODER ENCODER UNIT-B 300RHH.  REMOVED AND REPLACED DECODER ENCODER UNIT-B 300RHH (AALA202010229013), PER AMM 213-73-47, NO HELP.   REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT ON 14WL AND 15WL (AALA202010229007).  OPERATIONS CHECK GOOD, PER AMM 33-51-00.

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