# SDR AALA202607200796

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2026
- Submitted: July 20, 2026
- Operation: Air carrier
- Aircraft: [N163US](https://openairdocs.org/aircraft/N163US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1417
- Aircraft time: 79,943 hours, 31,241 cycles
- Engine: Cfmint CFM565B3P
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Oil Cap
- Condition: Leaking
- Location: Nr 1 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607200796

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO ORD DUE TO THE FLIGHT CREW REPORTING THAT #1 ENGINE HAD EXCESSIVE OIL CONSUMPTION. OIL QUANTITY STARTED AT 12.5 AND FELL TO 6.5. THE AIRCRAFT LANDED SAFELY AT ORD WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE #1 ENGINE OIL CAP LEAKING DUE TO DAMAGED O-RINGS AND REPLACED THE O-RINGS PER AMM 79-11-10. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.

---
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.