# SDR GVNA20250528001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2025
- Submitted: May 28, 2025
- Operation: Air carrier
- Aircraft: [N455MH](https://openairdocs.org/aircraft/N455MH), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9161
- Aircraft time: 10,545 hours, 46,527 cycles
- Engine: Tmeca ARRIEL1E2
- Engine time: 9,312 hours, 28,368 cycles
- System (JASC): [7300 · Engine Fuel and Control](https://openairdocs.org/jasc/7300)
- Part: Fuel Control
- Part number: 0164851330
- Part serial: 1364M
- Condition: Inoperative
- Location: Nr 1 Engine
- Stage of operation: TO
- How discovered: V
- Nature of condition: R, J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GVNA20250528001

## Discrepancy

WHEN CLIMBING OUT FROM A HELIPAD TO A HIGH HOVER AT HIGH POWER SETTINGS, THE #1 ENGINE DROPPED OFFLINE CAUSING A LARGE TORQUE SPLIT WITH THE #2 ENGINE GOING UP TO MAX OEI TORQUE FOR ABOUT 10 SECONDS WHILE THE PILOT LANDED.  THE #1 ENGINE DID NOT RESPOND TO TRIM INPUTS ATTEMPTING TO MATCH THE TORQUES DURING THIS EVENT.  THE AIRCRAFT WAS LANDED WITHOUT INCIDENT AND MAINTENANCE WAS CALLED.  THE MECHANIC FOUND A DISPLACED PIN AND ROLLER IN THE P2 CHAMBER OF THE #1 FUEL CONTROL.  THE FUEL CONTROL WAS CHANGED AND THE AIRCRAFT RETURNED TO SERVICE AFTER VARTOMS ADJUSTMENTS TO THE NEW FUEL CONTROL.

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