# SDR DALA2021052702944

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2021
- Submitted: May 27, 2021
- Operation: Air carrier
- Aircraft: [N314DN](https://openairdocs.org/aircraft/N314DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 7281
- Aircraft time: 12,383 hours, 6,073 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Line
- Condition: Leaking
- Location: Apu Oil Cooler
- Stage of operation: IN
- How discovered: 9
- Nature of condition: K, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021052702944

## Discrepancy

INSPECTED APU. NOTICED HEAVY OIL SMELL ON RIGHT SIDE OF APU COMPARTMENT (WIP299411) FOUND OIL LEAK AT THE OIL COOLER RETURN AND SUPPLY LINE. REMOVED AND REPLACED BOTH LINES PER A321 AMM 49 -91-44 P/N 3881763-2 & 3881764-2. ACCOMPLISHED AMDS CARDS 0550- 200, 4900-2001 AND 4916-2001. REMOVED AND REPLACED BOTH RECIRCULATION FILTERS PER A321 AMM 21-21-41. LEAK CHECK GOOD. NO SMELLS NOTED. OK FOR SERVICE. (LP# 1818802)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.