# SDR F3LA2024010400000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2024
- Submitted: January 4, 2024
- Operation: Air carrier
- Aircraft: [N329FR](https://openairdocs.org/aircraft/N329FR), registered now
- Make and model: Airbus A320-251N
- Registry model: [Airbus A320-251N](https://openairdocs.org/model/airbus-a320-251n) (OpenAirDocs)
- Aircraft serial: 08135
- Aircraft time: 17,904 hours, 7,912 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 152569
- Condition: Failed
- Location: Zone 200
- Part time: 19,596 hours, 8,318 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/F3LA2024010400000

## Discrepancy

DURING HEAVY CHECK, EPSU TEST YIELDS FAULT "335138 EPSU (10WL) FWD L".  NOTE: THIS DID NOT CAUSE A FLIGHT DELAY.   REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (EPSU) 10WL FOLLOWING AMM 33-51-38-000-001-A AND AMM 33-51-38-400-001-A. BITE TEST, INTERFACE AND POWER-UP TEST OKAY. NO FURTHER MAINTENANCE ACTION REQUIRED.

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