Propeller Operation

Question 1

What are the symptoms of a failed primary propeller governor?

Answer 1

1. prop overspeed warning
2. RPM will exceed 2000 and go to 2120.

See page 7-19 of FlightSafety B200 PTM

Question 2

What are the symptoms of a failed overspeed governor?

Answer 2

RPMs could got to 106% of 2120 (2247) (overspeed governor) as limited by the fuel topping governor.

p. 7-19 of FlightSafety King Air B200 PTM

Question 3

What is the normal governed RPM of the PT-6 overspeed governor?

Answer 3

2000 RPM at full FWD

Question 4

Describe the preflight test of the overspeed governor?

Answer 4

1. Hold the prop gov test switch up.
2. Attempt to advance power lever beyond 2000 RPM and expect the overspeed governor “test” mechanism arrest / stop the increase in RPM at 1830-1910 RPM.

Question 5

Is the auto-feather system required to be operational for the B200? Can it be MEL’d?

Answer 5

Yes, it is required.
No, it may not be MEL’d.