Hydraulic

Question 1

Pressure to Pitch and roll trim actuators in pilot assist

Answer 1

1000 psi

Question 2

Pressure of system

Answer 2

3000 psi

Question 3

LDI

Answer 3

leak detection/isolation system

Question 4

No.1 Hydraulic powers?

Answer 4

First stage of the primary servos and first stage of the tail rotor servo

Question 5

What drives No 1/2 pumps

Answer 5

accessory modules

Question 6

Pump components

Answer 6

Pressure relief valve
Bleed valve
Pressure filter
Return filter
Automatic low level sensing
Both pressure and return filters have PDI

Question 7

Filter with bypass

Answer 7

Return filter, Pressure filter has no bypass

Question 8

Transfer module

Answer 8

Routes fluid
Automatically routes fluid from backup pump if pressure lost through transfer / shuttle valve
Shutoff valves for primary servos and tail rotor servo/pilot assist

Question 9

No.2 Hyd pump powers what?

Answer 9

Second stage primary servos and pilot assist servo assembly

Question 10

How to secure pitch and roll trim actuators

Answer 10

Pressing TRIM cube on AFCS

Question 11

How to secure boost servos and SAS actuators

Answer 11

SAS/BOOST pushbutton

Question 12

Electrical interlock between first and second stage of primary servos

Answer 12

Prevents securing hydraulic power to both, if malfuntioning stage it precludes inadvertent securing of the good stage

Question 13

What powers Backup hyd pump

Answer 13

AC electrical motor

Question 14

Backup hyd pump purpose prior to rotor engagement

Answer 14

Provides pressure to #1/2 hyd systems

Question 15

Other functions of Backup hyd pump

Answer 15

Pressure to rescue hoist system

Recharges the APU accumulator

Question 16

What is secured when Backup is supplying pressure to #2 tail rotor servo

Answer 16

Priority valve secures pressure to the rescue hoist

Question 17

Time to energize the Backup pump

Answer 17

4 seconds with APU, 0.5 seconds with either main generator

Question 18

Backup pump internal depressurizing valve

Answer 18

reduces the output pressure to aid startup of the electric motor

Question 19

WOW backup switch functions

Answer 19

OFF- off
ON- recirculates fluid to and from each transfer module, maintains pressure to apu accumulator and rescue hoist
AUTO- Automatically maintains pressure to #1/2 systems and second stage of tail rotor servo as detected by LDI

Question 20

Weight off wheels

Answer 20

OFF or AUTO - same as WOW auto and pressure to second stage tail rotor if tail servo switch placed to BKUP

Question 21

Run time if backup hyd pump switch is cycled

Answer 21

90 seconds, 180 seconds with winterization kit

Question 22

When will Backup pump automatically turn on

Answer 22

#1 HYD PUMP (Loss of pressure)
#2 HYD PUMP (Loss of pressure)
#1 RSVR LOW
#1 TAIL RTR SERVO (Loss of pressure)

Question 23

Utility module function

Answer 23

Acts as transfer module for Backup pump
Has velocity fuse to secure fluid flow to APU accumulator if flow rate is excessive

Question 24

Requirements for HYD leak test

Answer 24

WOW
AC power
Rotors engaged
All reservoirs full
Backup Hyd pump switch in AUTO

Question 25

What could fail if ON when Backup pump is turned on

Answer 25

FLIR

Question 26

Backup pump CB popped and you need to trun the backup pump on

Answer 26

Caution make sure the aircraft is configured so the backup pump will not come back on when CB is reset

Question 27

Indications of HYD leak test

Answer 27

#1 / 2 RSVR LOW
BACKUP RSVR LOW
SAS
BOOST SERVO OFF
AFCS DEGRADED
#1 / 2 TAIL RTR SERVO
BACKUP PUMP ON
MASTER CAUTION

Question 28

Hydraulic fill system

Answer 28

Hand pump and manual selector valve used to fill and service reservoirs
Also serves as rotor brake reservoir

Question 29

Utility Hyd system

Answer 29

Independently operates the sonar reeling machine
Right rear quarter of the main transmission
Circulates at 1000 PSI when not on
Increases to 3000 PSI when turned on

Question 30

Three boost servos

Answer 30

Collective, Yaw, and Pitch

Question 31

All boost servos and roll channel incorporate a SAS actuator which provides rate damping

Answer 31

Roll channel is not boosted, just SAS