What was found
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.
- Difficulty date
- June 23, 2021
- Submitted
- July 1, 2021
- Operation
- Air carrier
- Aircraft
- N447DB
- Make and model
- Beech C90A
- 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
- 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
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.