# SDR 2026FA0000413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2026
- Submitted: May 20, 2026
- Operation: General aviation
- Aircraft: [N301J](https://openairdocs.org/aircraft/N301J), registered now
- Make and model: Bell 206L-4
- Registry model: [Bell 206L-4](https://openairdocs.org/model/bell-helicopter-textron-canada-206l-4) (OpenAirDocs)
- Aircraft serial: 52341
- Aircraft time: 1,953 hours
- Engine: Allsn 250C30P
- Engine time: 1,953 hours
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Check Valve
- Part number: 23083750
- Condition: Stuck
- Location: Engine Oil
- Part time: 1,953 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000413

## Discrepancy

UPON REMOVAL OF THE OIL CHECK VALVE FOR ROUTINE TESTING, THE AMT NOTICED NO OIL FLOWED OUT OF THE LINE GOING TO THE 6&7 BEARING.  THE CHECK VALVE WAS FOUND TO BE STICKING OPEN ALLOWING OIL TO FLOW BACK INTO THE GEARBOX WHICH COULD DELAY OIL FLOW TO THE BEARING ON STARTUP.   THE AMT WAS A BLT TO UNSTICK THE VALVE BUT IT IMMEDIATELY GOT STUCK OPEN AGAIN WHILE TESTING THE VALVE.  THE PART WAS REPLACED WITH A NEW UNIT.

---
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.