Hydraulics & Flight Controls

Question 1

Output from the cockpit controls is carried by ____, through Pilot assist servos, to the mixing unit.

Answer 1

Mechanical Linkage and Bell Cranks

Question 2

Cyclic stick position is maintained by the ____.

Answer 2

Roll Trim Actuator

Question 3

There are 2 tail rotor cables that connect the controls to the ____.

Answer 3

Aft Quadrant.

Question 4

If both tail rotor cables fail, a centering spring will position the tail rotor servo linkage to provide enough pitch to allow trimmed flight at about __ KIAS and __ KIAS

Answer 4

25 KIAS and 145 KIAS

Question 5

On the primary servos there are 2 pressure switches, 1 for each stage, located on top of each servo to illuminate first or second stage primary servo pressure caution light if pressure drops below ____ or a Pilot valve jams

Answer 5

2,000 ±50 psi

Question 6

Mixing unit automatically provides ____ mechanical control mixing functions which reduce Pilot workload.

Answer 6

4

Question 7

The TAIL SERVO switch is located on the ____.

Answer 7

miscellaneous switch (MISC SW) panel

Question 8

The Pilot Assist Module has a pressure reducer with relief valve that reduces pressure to ____ psi for pitch trim actuator.

Answer 8

1,000 PSI

Question 9

The Pilot Assist Module has a red indicator button on the trim pressure reducer that will pop up if trim pressure exceeds ____ psi.

Answer 9

1,500 PSI

Question 10

Each hydraulic system is designed to provide ___ ±50 psi of pressure under no load conditions.

Answer 10

3,000 +/- 50

Question 11

During normal operations, the Pilot Assist Module directs hydraulic pressure to the Pilot Assist Servos from which pump?

Answer 11

No. 2 Hydraulic Pump

Question 12

In the event yaw boost servo jams or has a hardover, a force of ____ lbs would be necessary to move the flight controls with only a mechanical linkage.

Answer 12

250 Lbs

Question 13

The ____ switch on the AFCS control panel only affects collective and yaw boost.

Answer 13

BOOST

Question 14

Red indicator button on each filter on the No. 1 and No.2 hydraulic pump pops out when pressure goes to ____.

Answer 14

70 PSID ±10.

Question 15

The delay on the depressurizing valve is 0.5 sec if main generators are on, or ___ if APU generator or external power is source of power.

Answer 15

3–5 sec

Question 16

What 5 lights bring on the Back-up Hydraulic Pump?

Answer 16

#1 HYD PUMP
#1 RSVR LOW
#1 TAIL RTR SERVO
#2 HYD PUMP
APU ACCUM LOW

Question 17

The utility module contains a velocity fuse that shuts off flow to APU accumulator if flow rate exceeds ____ gpm.

Answer 17

1.5 GPM (Gallons Per Minute)