# SDR QR9R20210928001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2021
- Submitted: September 28, 2021
- 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: 18724279813
- Aircraft time: 1,526 hours
- System (JASC): [7712 · Engine BMEP/Torque Indicating](https://openairdocs.org/jasc/7712)
- Part: Torque Box
- Part number: B771M2007101
- Part serial: 965
- Condition: Split
- Stage of operation: HO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20210928001

## Discrepancy

ON HOVER, ENG SPLIT AND ENG PA DIS CAUTION ON CAD RESULTING IN A MISSION ABORT. A T/F EVALUATION REVEALED SYSTEM 1 AND 2 ENG PA DIS DISPLAYED ON CAD WITH BOTH NUMBER 1 AND 2 TQ INDICATIONS IN YELLOW WHEN PICKING THE ACFT UP TO A HOVER. ENGINE SPLIT DISPLAYED INITIALLY AT A HOVER AS WELL WITH NUMBER 2 ENG GREATER THAN 10% N1 DIFFERENE OF ENG 1. TORQUE ADJUST BOX ASSEMBLY WAS REPLACED IAW AMM77-12-00,4-2; TEST FLIGHT SUCCESSFULLY COMPLETED.

*NOT FOUND IN AIRCRAFT INQUIRY

---
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.