# SDR AALA202409104806

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2024
- Submitted: September 10, 2024
- Operation: Air carrier
- Aircraft: [N161UW](https://openairdocs.org/aircraft/N161UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1403
- Aircraft time: 74,410 hours, 28,718 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 045378
- Condition: No Test
- Location: Zone 200
- Part time: 74,418 hours, 28,720 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/AALA202409104806

## Discrepancy

AIRCRAFT WAS IN BASE MAINTENANCE: DONT WORK CORRECTLY EPSU-EMERGENCY POWER SUPPLY UNIT 14WL INCLUDING BATTERY IN PASSENGER CABIN. REPLACED EPSU-EMERGENCY POWER SUPPLY UNIT 14WL (AALA202409107071) INCLUDING BATTERY (AALA202409104806) IN PASSENGER CABIN IAW AMM 33-51-38-000-001-A AND AMM 33-51-38-400-001-A. PERFORMED BITE TEST, TEST IS OK IAW AMM 33-51-00-710-001-A.

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