# SDR QR9R2026031300001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2026
- Submitted: March 13, 2026
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 9401
- Aircraft time: 4,714 hours
- System (JASC): [7712 · Engine BMEP/Torque Indicating](https://openairdocs.org/jasc/7712)
- Part: Torque Box
- Part number: B771M2007101
- Part serial: 410
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: TX
- How discovered: V
- Nature of condition: F
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2026031300001

## Discrepancy

ENGINE PARAMETER MALFUNCTION DURING START RUN-UP. REMOVED AND REPLACED TORQUE ADJUSTMENT BOX IAW AMM 77-12-00, 4-2. T/F MOC COMPLETED; CHECKS GOOD.

---
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.