# SDR 2022F00353

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 7, 2022
- Submitted: September 7, 2022
- Operation: General aviation
- Aircraft: [N412CF](https://openairdocs.org/aircraft/N412CF), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54665
- Aircraft time: 2,294 hours, 9,319 cycles
- Engine: Allsn 250C47B
- Engine time: 2,102 hours, 6,131 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: None
- Condition: None
- 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/2022F00353

## Discrepancy

PILOT REPORTED DURING HIS PRE-FLIGHT CHECK THAT THE ENGINE OIL DIFFERENTIAL BYPASS INDICATOR WAS EXTENDED ON THE COMBINED ENGINE FILTER ASSEMBLY (CEFA)

---
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.