# SDR QR9R2026092200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2026
- Submitted: September 22, 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: 9802
- Aircraft time: 4,662 hours
- System (JASC): [7322 · Fuel Control/Reciprocating Engines](https://openairdocs.org/jasc/7322)
- Part: Fuel Control
- Part number: 0164851840
- Part serial: 17065
- Condition: Fluctuates
- Location: Engine
- Stage of operation: HO
- 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/QR9R2026092200001

## Discrepancy

CONTINUAL NEEDLE SPLIT GREATER THAN 15% CAUSING VAR NR CAUTION TO COME ON DURING HOVERING FLIGHT. A TEST FLIGHT EVAL FOUND THAT WHILE MAKING ADJUSTMENTS TO VARTOMS, AMM 05-60-00, 6-10, 1.1 (SYMMETRY OF ENGINE GOVERNORS) TQ NUMBERS WERE INCONSISTENT. FIRST PULL TO 60% TQ ON #1 SHOWED A 5% SPLIT WITH #1 HIGH, SECOND PULL TO 60% ON #1 SHOWED 9% SPLIT WITH ONE HIGH, THIRD PULL TO 60% ON #1 SHOWED 8% SPLIT WITH #2 HIGH. #2 SYSTEM WAS CONSISTENTLY SLOW TO REACT AND FOLLOW #1. REMOVED AND REPLACED #2 ENGINE FUEL CONTROL UNIT IAW ARRIEL EMM 73-21-00-900-801-B01.

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