# SDR G1IA2021070163014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2021
- Submitted: July 1, 2021
- Operation: Air carrier
- Aircraft: [N447DB](https://openairdocs.org/aircraft/N447DB), registered now
- Make and model: Beech C90A
- Registry model: [Beech C90A](https://openairdocs.org/model/beech-c90a) (OpenAirDocs)
- Aircraft serial: LJ1656
- Aircraft time: 5,982 hours, 6,742 cycles
- Engine: Pwa PT6A21
- Engine time: 7,702 hours, 4,200 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Fcu
- Part number: 32447454
- Part serial: C17636
- Condition: Binding
- Location: Lt Engine
- Part time: 1,575 hours, 2,246 cycles
- Stage of operation: CR
- How discovered: 9
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/G1IA2021070163014

## Discrepancy

UNCOMMANDED VARIATIONS IN #1 ENGINE POWER WITHOUT MOVEMENT OF THE POWER LEVER.    REMOVED FUEL CONTROL UNIT AND BENCH CHECKED. FOUND FCU DRIVESHAFT TO BE BINDING INTERNALLY. REPLACED FUEL CONTROL UNIT, NO FURTHER DISCREPANCIES NOTED.

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