DQ-137

Question 1

Is it acceptable to use the gust lock as a “rotor brake” as long as the rotor is only coasting?

Answer 1

NO, the lock shall only be applied when the rotor system is stationary.

para 2.51.2

Question 2

An unsafe main rotor blade pressure condition is indicated how?

Answer 2

The Blade Inspection Method (BIM) will show red bands.

para 2.51.1

Question 3

What is the purpose of the bifilars? The main rotor dampers provide what functions?

Answer 3

The bifilar vibration absorber reduces rotor vibration at the rotor.

The main rotor damper restrain hunting (lead and lag motions) of the main rotor blades during rotation and absorb rotor head starting loads.

para 2.51

Question 4

Explain the function of the tail rotor quadrant springs and the centering springs.

Answer 4

The tail rotor quadrant springs enables the pilot to operate the tail in a normal manner, in case a rotor cable becomes severed.

The centering springs sets the tail rotor at a 10 1/2 degree angle if both cables becomes severed.

Question 5

Given the following cruise conditions what is the Maximum Torque Available Single Engine and explain how is it calculated?

TEMP 40 Degrees
PA 2000’
ACFT GWT 20000 LBS
ETF 1.0/.92
Cruise KIAS 80 KIAS

Answer 5

MAX torque: 54 (from chart) x 2 = 108 %

Chart used 7A-55

Question 6

Use of the terms “P” for the APU or inker-dinker for the speed trim switch is a failure to use correct what?

Answer 6

Standard Crew Terminology

Aircrew coordination

(be explicit)