DQ-141

Question 1

What are the indications of a SAS Failure with No Failure Advisory? Give a reason SAS 1 would be turned off first and why is FPS turned off?

Answer 1

Moderate tip path oscillations often accompanied with pounding sounds or “knocking” which may be felt in the cyclic or pedal controls.

SAS 1 is turned off because it does not contain diagnostic capabilities, FPS is turned off because it needs both SAS and trim to funciton.

(Fredrik: FPS needs SAS 1 and/or 2, BOOST & TRIM - Martin)

Question 2

FLT PATH STAB and Trim Fail cautions illuminate in level flight, when POWER ON RESET switches are pressed the cyclic moves approximately 1⁄2 inch left, and the FPS and TRIM fail cautions reappear, what was the malfunction?

Answer 2

Pitch FPS/trim hardover

Question 3

While conducting shipboard operations the Master Caution illuminates followed by an uncommanded nose down movement, what may have occurred?

Answer 3

Stabilator or FPS/SAS failure

Question 4

In addition to providing the “muscle” for FPS, TRIM provides what other functions?

Answer 4

Trim provides pitch, roll and yaw flight control position reference, and control gradient to maintain cyclic stick and pedals at a desired position.

Question 5

IAW TC 3-04.33 explain how the cyclic and pedals are used in ground taxi. Explain the indications of excessive use of either.

Answer 5

Cyclic is used to maintain a level fuselage attitude during turning, slight forward cyclic is used to regulate speed. Excessive cyclic input may result in droop stop pounding.

Pedals are used to turn the aircraft.

Question 6

Minimum single engine airspeed (departure) is the slowest the aircraft can fly:
At what PA/Temp?
At what altitude?
At what power setting?
Using which engine?
Decelerating below minimum SE airspeed will result in the aircraft descending and the rotor decreasing. T/F?

Answer 6

1. MAX PA/TEMP
2. T/O ALT
3. Below 2.5 min power setting
4. “Weakest” low ETF engine
5. True