C130J Apu Study Guide

Front 1

The apu provides what functions for ground operation?

Back 1

Air to pressurize bleed air system, engine starting, air conditioning and other pneumatic systems, also drives a 40/50 KVA generator

Front 2

All APU controls and indications are processed by?

Back 2

One of the two mission computers

Front 3

What fuel tank gravity feeds the APU and what is the minimum fuel required to start?

Back 3

The #2 main tank requires a minimum of 2000 lbs for APU operation

Front 4

What is the APU oil tank capacity?

Back 4

4 qts or 1 gallon

Front 5

The cargo ramp manual control knob will be placed in which position?

Back 5

3N or 6N

Front 6

Inspect the area around the APU inlet and door for?

Back 6

Ice and foreign objects

Front 7

Which ecb's must be closed for APU operation?

Back 7

123 APU start relay, 124 APU run relay, 455 F/ODS chan b, 626 F/ODS chan a

Front 8

What position must the APU alarm switch be placed in prior to start?

Back 8

On

Front 9

What two forms of communication can be used for APU start?

Back 9

Visual with battery and comm cord with external power

Front 10

When battery switch is on, what is the minimum DC volts

Back 10

22 VDC (24 in-flight)

Front 11

What system in inoperative during battery start of APU?

Back 11

No fire warning protection during APU battery start until AC power is up and online

Front 12

The APU start light goes off at what RPM?

Back 12

APU start light goes off at 50% or within 90 seconds

Front 13

After the APU reaches 50% RPM, what it the minimum time to reach 98-105%?

Back 13

35 seconds

Front 14

After the APU reaches operating speed, what rpm should be maintained?

Back 14

Between 98-105% rpm

Front 15

What is the maximum allowed EGT for the APU?

Back 15

680 degrees C

Front 16

Placing AC power switch to APU will result in?

Back 16

Aircraft electrical system self contained and external power can be removed

Front 17

What position is the floor switch placed during an APU run?

Back 17

To fan

Front 18

What is the minimum warm up and stabilization time before applying a bleed air load?

Back 18

1 minute, if the outside temp is below freezing, wait an additional 3

Front 19

What happens when the APU control switch is switched to run?

Back 19

The inlet door opens to 35 degrees

Front 20

During APU emergency start, how far does the inlet door open?

Back 20

15 degrees

Front 21

What action can be taken in the event the APU door will not open upon startup?

Back 21

Operation of APU with failed door actuator (1-1-2)

Front 22

How many seconds must the APU control switch be held to start?

Back 22

1 second and confirm start light

Front 23

On first start attempt- if APU start light does not go off within 90 sec or RPM reaches 50%, what action must be taken?

Back 23

APU control switch to stop, wait until turbine stops until second start attempt

Front 24

With a second failed APU start, what is the minimum time allowed before a third attempt?

Back 24

5 minutes

Front 25

Third start fail, what is the minimum time allowed before initiating subsequent start attempts?

Back 25

60 minutes

Front 26

If an ESS DC BUS OVERLOAD message appears on the ACAWS, what mx action is required?

Back 26

No mx action required unless the ACAWS with an RTRU and/or another bus fail

Front 27

When the APU oil pressure reaches approx 3 psi or 10% RPM what is activated?

Back 27

APU fuel shutoff solenoid valve

Front 28

What must be performed prior to pressing the APU bleed air valve switch to open?

Back 28

clear personnel and equipment from all 4 engines

Front 29

APU bleed air pressure should stabilize at what pressure?

Back 29

30 psi minimum

Front 30

What is the minimum APU bleed down time?

Back 30

30 psi to 15 psi in 22 seconds or greater

Front 31

What happens if the isolated DC power is interrupted while the APU is operating?

Back 31

The APU will stop. If that happens, place the control switch to stop, wait 4 minutes, then repeat starting procedure

Front 32

If the bleed air press indicator drops during APU operation, what action should you take?

Back 32

Perform a normal APU shutdown to prevent a bleed air leak and a possible fire

Front 33

During APU operation, an ACAWS displays an anti-icing system over temp; what action must be taken?

Back 33

APU must be shut down to prevent damage to the wing structure

Front 34

After pressing the APU bleed air valve switch to closed, how many minutes before the APU control switch can be placed to stop?

Back 34

1 minute for the APU to stabilize

Front 35

What is the result when the APU speed decreases to approx 18% RPM or low oil pressure switch actuates at approx 20 psi?

Back 35

The APU door closes

Front 36

When the APU fire control handle is pulled, what is de-energized?

Back 36

All APU circuits are de-energized. APU door closes and the fire extinguishing system is energized

Front 37

If APU FIRE WARNING message comes on or a situation requiring immediate shutdown occurs, what action must be taken?

Back 37

Pull the APU Fire Handle

Front 38

If APU fire occurs, what action must be taken?

Back 38

Discharge. If the fire persists, discharge the other bottle

Front 39

After the ground observer is notified and ground control is requested, what other mx is required in case of an apu emergency?

Back 39

APU control switch to stop, AC power switch to off, BTRY switch to off, and evacuate the aircraft