# SDR 2026FA0000095

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2025
- Submitted: February 10, 2026
- Operation: General aviation
- Aircraft: [N723SF](https://openairdocs.org/aircraft/N723SF), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53264
- Aircraft time: 19,804 hours, 13,409 cycles
- Engine: Allsn 250C47B
- Engine time: 9,409 hours, 13,409 cycles
- System (JASC): [1220 · Oil Servicing](https://openairdocs.org/jasc/1220)
- Part: Filter
- Part number: WF338110
- Condition: Mismanufactured
- Location: Zone 200
- Component: Transmission, Bell
- Component part number: 407040006107FM1
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000095

## Discrepancy

PERFORMING TRANSMISSION OIL AND FILTER CHANGE, MECHANIC NOTED THAT NEW OIL FILTER WOULD NOT INSTALL ON THE FILTER BOSS. WENT THROUGH INVENTORY AND FOUND THAT A TOTAL OF 10 FILTERS FROM OUR STOCK WOULD NOT FIT ON THE FILTER BOSS.

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