Hyd SYS - 2

Question 1

where is the pedal adj handle?

Answer 1

on side of instrument panel

Question 2

outputs from the cockpit controls are carried by mechanical linkage through the pilot assist servos

Answer 2

MMU

Question 3

which panel has the tail servo and backup hyd switches

Answer 3

misc sw. panel

Question 4

The MMU is designed to reduce

Answer 4

INHERENT CONTROL COUPLING

Question 5

Name the four mechanical mixes provided by the MMU

Answer 5

Collective to: Pitch/roll/yaw
AND
Yaw to Pitch

Question 6

Describe collective to pitch

Answer 6

MMU put fwd input to rotor disk to prevent nose-high attitude

Question 7

Collective to yaw

Answer 7

MMU inputs left pedal to compensate for torque effect

Question 8

Yaw to pitch

Answer 8

Aft input to M/R system as T/R pitch is increased. It compensates for vertical thrust

Question 9

Collective/Airspeed to yaw

Answer 9

As collective and A/S increase, T/R pitch is decreased and vise versa

Question 10

Collective to roll

Answer 10

MMU makes left rotor disk to compensate for translating tendency.

Question 11

The SERVO OFF switch has an __ ___ to prevent both servo stages from being turned off

Answer 11

electrical interlock

Question 12

5 lights that have to come on for backup pump to come on?

Answer 12

"ROY HAS TO HURRY AWAY "
#1 Reservoir
#1 Hyd pump
#1 T/R Servo
#2 Hyd pump
Accum low

Question 13

With a leak, it takes how many seconds to lose both systems?

Answer 13

11-13

Question 14

Servos are the only thing that can ___

Answer 14

jam or hardover

Question 15

How long does the MMU minimize inherent control coupling?

Answer 15

by combining, summing and coupling collective pitch, roll and yaw inputs

Question 16

What is the only trim actuator that receives hydraulic power from the number 2 hyd system

Answer 16

Pitch control

Question 17

why is collective/airspeed to yaw mixing completely phased out when the airspeed is above 100kts

Answer 17

efficiency of the T/R and the cambered fin

Question 18

Moving servo off SW from norm to 1st stg or 2nd stg will

Answer 18

turn off that stage of servos

Question 19

What is the reason for the depressurization valve to only connect to the backup pump?

Answer 19

to reduce output pressure of the pump upon startup of the electric motor

Question 20

the #1 hyd system supplies hyd fluid through its xfer module to what servos?

Answer 20

1st stage primary servos and first stage tail rotor servo

Question 21

Hyd leak test sw. allows testing of the _?

Answer 21

LDI

Question 22

What hyd pump is the depressurized valve on?

Answer 22

Backup hyd pump

Question 23

the rsvr 1/2backup low caution illuminates when?

Answer 23

when there is 60% fluid remaining in the reservoir (leak in the system)

Question 24

if a tail rotor cable breaks, what caution and/or advisory would appear?

Answer 24

T/R quad fail caution

Question 25

the #2 hyd system supplies pressure through the transfer mod to what servos?

Answer 25

2nd stage primary servos and the pilot-assist servos

Question 26

appearance of the boost servo off caution indicates?

Answer 26

loss of hyd pressure to the collective and/or yaw boost servo

Question 27

what is the purpose of the APU accumulator?

Answer 27

provide hydraulic charge to the APU starter motor

Question 28

in flight the backup pump mode automatically sets to ?

Answer 28

the auto mode is even on if the switch is in the off or on position

Question 29

what does the backup pump supply pressure to?

Answer 29

1 and/or #2 hyd system, 2nd stage tail rotor servo and APU accumulator.

Question 30

Name the trim actuators

Answer 30

yaw, roll, collective, pitch

Question 31

what FCC drives the trim actuator

Answer 31

FCC #2

Question 32

utility module

Answer 32

directs flow of pressure from the backup pump to the number 1/2 transfer module second stage tail rotor and apu accumulator.

Question 33

what piece isolates the primary servos?

located on the?

Answer 33

primary shutoff valve
transfer mods - after moving servo off sw.
(think primary servos primary shutoff valve)