APU

Question 1

Max EGT limits for Start

Answer 1

800F for 1 min, then up to 1200 F

Question 2

Max EGT limits for GEN ONLY

Answer 2

decreases from 1200 F to 800 F

Question 3

Max EGT limits for EWO

Answer 3

1300 F

Question 4

APU RPM for normal, GEN ONLY, and EWO modes is approx _____

Answer 4

100 – 103%

Question 5

When checking the FIRE system on the APU you should see the ________ light come on then the ________ light to know that the system check’s good

Answer 5

DSBLD, FIRE

Question 6

The APU DRS OPN light will go out _______ after you select STOP and you should check that it goes out within _____

Answer 6

30 sec; 1 min

Question 7

You cannot restart an APU for ____ or ________ indications but you are allowed ___ restart for transient BITE codes

Answer 7

Fire or overheat; 1

Question 8

T/F Once an ESCU has initiated a shutdown or start, it cannot be manually interrupted by normal controls until the sequence is complete

Answer 8

TRUE

Question 9

To ensure the APU doors are not frozen shut when OAT is below 4C and visible moisture is present, ___________________________ prior to starting the APUs

Answer 9

Open and close the APU doors manually

Question 10

Automatic stopping of the APU may indicate a _______ or

Answer 10

Fire or overheat within the unit

Question 11

APU Start Accumulator Pressure is _________

Answer 11

3,000 +/- 350 PSI

Question 12

EWO mode should only be used ____

Answer 12

When authorized by the proper authority

Question 13

To place both APUs in EWO mode press the ______ switch

Answer 13

EWO

Question 14

If the emergency dictates, the APU’s may be shut down by pressing the ____.

Answer 14

APU DISENG switch

Question 15

Do not operate the air conditioning system with the right alternate pressurization switch in _____ for an extended period of time

Answer 15

Full increase

Question 16

The Ready light will come on if the APU is operating in either the ________ or ________ mode

Answer 16

Normal or EWO

Question 17

You have just arrived at the aircraft and you see the DRS OPEN and RDY light illuminated. This indicates the APUs

Answer 17

Have reached 100% in the Normal mode

Question 18

The APU HYD accumulators are pressurized by

Answer 18

the Right HYD system or the Left after Crossover

Question 19

Check the APU enclosure floor for evidence of fuel or HYD fluid prior to a _____ start

Answer 19

Normal

Question 20

With the APU Generator Switch in the GEN TEST, check the ACTIVE GENERATOR lights to determine______

Answer 20

Which APU has the generator installed

Question 21

If APU surge bleed pulsing occurs after the RDY light comes on___.

Answer 21

Shut down the APUs

Question 22

Bleed air from the APUs cannot reach the air conditioning pack if the ____ is not open

Answer 22

Crossover Valve

Question 23

Be sure the ram air inlet scoop and outlet ducts are open and clear before ________ the airplane with the APUs

Answer 23

Heating

Question 24

The APU fire detector system remains energized for ____ minutes after the APU’s are shut down

Answer 24

5 minutes

Question 25

Manual charging of the APU Start Accumulators requires approximately _____ full pump strokes to complete recharging

Answer 25

500