# SDR QMLA2026091320064

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2026
- Submitted: September 13, 2026
- Operation: Air carrier
- Aircraft: [N293AM](https://openairdocs.org/aircraft/N293AM), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54617
- Aircraft time: 6,490 hours, 10,346 cycles
- Engine: Allsn 250C47B
- Engine time: 3,583 hours, 12,059 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Bypass Valve
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: LD
- How discovered: V
- Nature of condition: B
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2026091320064

## Discrepancy

UPON LANDING NOTICED COPIOUS AMOUNTS OF SMOKE BILLOWING FROM THE EXHAUST. SHUTDOWN AND NOTED THAT THE ENGINE OIL SITE GLASS WAS EMPTY.  REPLACED ENGINE TURBINE ASSEMBLY, COMPETED AAIP INSPECTIONS, RII CHECKLIST, OPERATIONAL CHECKS, AIRCRAFT RETURNED TO REVENUE SERVICE, REF MEC-64099

---
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.