# SDR DALA2024012501138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2024
- Submitted: January 25, 2024
- Operation: Air carrier
- Aircraft: [N398DN](https://openairdocs.org/aircraft/N398DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 9360
- Aircraft time: 12,586 hours, 5,457 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Overserviced
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: W, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2024012501138

## Discrepancy

AIRCRAFT 3098, SMELLED ELECTRICAL BURNING ODOR DESCENDING THROUGH 11,000 AND AGAIN SHORT FINAL THROUGH ROLLOUT. PILOTS, DOORS 1, 2, AND 4. CORRECTIVE ACTION: FOUND OVER SERVICED APU OIL AND EVIDENCE OF OIL CONTAMINATION IN BLEED SYSTEM. DEFERRED APU REPLACEMEMT PER MEL 49-10-01A. (LP4886542, 4886544)

---
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.