# SDR QR9R20211116003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2021
- Submitted: November 16, 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: 15723989780
- Aircraft time: 1,948 hours
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Fuel Control
- Part number: 0164851980
- Part serial: 1712
- Condition: Split
- Part time: 1,585 hours
- 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/QR9R20211116003

## Discrepancy

VARTOMS FLUCTUATIONS OF +/- 3 FLI DIFFERENCE BETWEEN #1 AND #2 WITH VARNR KICKING OFF. COULDN'T MANUALLY TO MATCH ,BUT ONCE VARNR RESET IT WOULD KICK OFF AGAIN WITH SPLIT IN FLI. IT HAPPENED 3 TIMES IN A ROW AND EITHER FLI NEEDLE WOULD GO HIGH (NOT JUST #1 OR #2). COMPLETED MTF TO TROUBLESHOOT VARTOMS/TQ FLUCTUATIONS: IN NORMAL VARTOMS MODE, BOTH FLI NEEDLES FLUCTUATED EXCESSIVELY DURING FLIGHT AND REPEATEDLY CAUSED THE SYSTEM TO QUICKLY REVERT TO MANUAL MODE. IN MANUAL VARTOMS MODE, #2 ENGINE SIGNIFICANTLY LAGGED BEHIND #1 ENGINE DURING POWER APPLICATIONS. SUSPECT FAULTY #2 FUEL CONTROL. REPLACED #2 ENGINE FCU IAW ARRIEL 1 E2 73-21-00-900-801.

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