C-9B Power Plant

Front 1

how many stages are in the low compressor section

Back 1

6

Front 2

power to drive the main accessory gearbox is taken from the ______

Back 2

front of the N2 compressor

Front 3

low pressure (N1) compressor receives its rotational force through _____________

Back 3

2nd, 3rd, and 4th stage turbine wheels (front compressor drive)

Front 4

how many stages are in the high compressor section

Back 4

7

Front 5

high pressure (N2) compressor receives its rotational force through _____________

Back 5

1st stage turbine wheel (rear compressor drive)

Front 6

what is pt2

Back 6

total pressure at station 2

Front 7

where is the pt2 located

Back 7

bottom right on the inlet guide vanes and on the nose cone

Front 8

what is tt2

Back 8

total temp at station 2

Front 9

where is the tt2 located

Back 9

bottom left on the inlet guide vanes

Front 10

what is n1

Back 10

front compressor, stage 1-6

Front 11

what is n2

Back 11

rear compressor, stages 7-13

Front 12

how many combustion cans are there

Back 12

9

Front 13

what combustion cans have igniters

Back 13

4 & 7

Front 14

where is the pt7 probes located and how many are there

Back 14

exhaust case, 6

Front 15

what controls cooling air flow

Back 15

tobi duct

Front 16

where are the tt7 probes located and how many are there

Back 16

exhaust case group, 8

Front 17

what is epr stand for and what is it

Back 17

engine pressure ratio, thrust

Front 18

how is epr measured

Back 18

pt7/pt2

Front 19

what drives the n2 tachometer generator

Back 19

accessory gearbox

Front 20

what has a higher pressure pt7 or pt2

Back 20

pt7

Front 21

what is on the rear of the gearbox

Back 21

starter, csd, and hydraulic pump

Front 22

what is on the front of the gearbox

Back 22

fuel pump and oil tank

Front 23

how much pressure is needed to start engines and where is it found

Back 23

36 psi and peanut gage

Front 24

what is duty cycle for engines

Back 24

1 min on/30 sec off
1 min on/1 min off

Front 25

anti icing for the engine inlet (fan case, guide vanes, and bullet nose) is provided by

Back 25

eighth stage air

Front 26

what does ps4 stand for

Back 26

static pressure station 4

Front 27

the fuel impeller (pump) provides pressurized fuel to the

Back 27

fuel heater

Front 28

fuel flow is scheduled by the fuel control as a result of
choose 4

ps4, ps3, n1, n2, tt2, pt2, pla

Back 28

tt2, ps4, pla, n2

Front 29

what does pla stand for

Back 29

power lever angle

Front 30

heat for the fuel deicing heater comes from what stage

Back 30

13th

Front 31

pressurization and dump valve is used to

Back 31

direct fuel to the to the primary and secondary fuel nozzles

Front 32

the only adjustments authorized on the fcu (fuel control unit) are

Back 32

idle and military trim (park)

Front 33

purpose of the eductor

Back 33

change vapor to liquid

Front 34

pneumatic engine starter requires a minimun of_____ psig for operation and where is it read

Back 34

36 psi, peanut gage

Front 35

ignition system operating duty cycle is

Back 35

2 on, 3 off, 2 on, 23 off

Front 36

engine starter duty cycle

Back 36

1 min on, 30 sec off, 1 min on, 1 min off

Front 37

joule and ignition

Back 37

20 at start and ignition override (adverse weather) when it goes to continuous 4 joule on # 7 igniter

Front 38

when the main oil filter becomes contaminated, which occurs first

Back 38

oil strainer clog light will illuminate

Front 39

if engine oil pressure follows the throttle, the probable cause is

Back 39

a defective oil pressure regulating valve

Front 40

the 8th stage antisurge bleed valves are opened and closed by

Back 40

8th stage air and closed by ps4

Front 41

what would cause the bleed valves to close late

Back 41

a leak in the pt2 sense line to the prbc

Front 42

prbc

Back 42

pressure ratio bleed control

Front 43

anti surge bleed valves

Back 43

increase compressor stability when closed