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APU > General > Flashcards

General Flashcards

1
Q

Is electrical power required for wing sweep operations?

A

No, they are hydraulically controlled

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2
Q

Pressure reading for APU accumulators

A

3600 to 4250 psi

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3
Q

Which component must be serviced prior to APU run what component must be checked

A

Service: ADG
Check: APU IDG

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4
Q

What position must UHF 1 and UHF 2 switches be set to

A

Upper

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5
Q

What position must the EMUX overtemp switch be set to?

A

On

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6
Q

On FUEL MGT Panel, ensure CLG SCOOP is set to what position?

A

Auto

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7
Q

What system is activated by the ENG BLEED AIR switches?

A

Bleed air Leak Detection System

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8
Q

What are my limits for operating the parking brake switch

A

Don’t hold for more than 30 seconds. Allow for 5 minute cool down.

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9
Q

What is load management 1 used for? How many APU’s are in use in this LM?

A

Refuel/Defuel. L APU only

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10
Q

What is the nominal start time for starting the APU?

A

15 Seconds

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11
Q

What percentage RPM will the APU RUN light illuminate?

A

95% RPM

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12
Q

What shall be closed prior to APU operation

A

Lower engine bay doors

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13
Q

What must personnel and equipment be clear off before applying hydraulic system pressure

A

Flight surfaces flight controls

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14
Q

During an APU run, what must your hydraulic system pressure be between?

A

3900-4150 PSI

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15
Q

What moves when you set the ENG INST TEST switch to HIGH?

A

APU Exhaust Doors

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16
Q

How long is the SCDU powered up for when you press ENG INST TEST to HIGH? What LM must you be in momentarily?

A

2 minutes. LM 4

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17
Q

To prevent APU oil from overheating, the APU shall not be operated without electrical power for how long?

A

5 minutes

18
Q

What must you do if you get an illuminated ENG switchlight on your Fire Warning & EXTGH panel when no engines are running? Why?

A

Shut down as if there were a fire. Engine comp loops may be detecting a fire

19
Q

What three things will occur immediately when a fire occurs in an APU compartment

A
  1. APU will shut down
  2. Light will illuminate
  3. Aural tone will sound
20
Q

What load management do you have to monitor ACL and fuel inlet temperatures? How many PMCS are required to monitor?

A

LM 4 w/o External Cooling
ACL = 1 PMC
Fuel Inlet Temp = 2 PMC’s

21
Q

Minimum time to run APU before coupling?

A

30 seconds or 5 minutes if cold or not run in the last 4 hours

22
Q

How long should the ADG take to couple?

A

6 seconds

23
Q

How long should ADG couple below 30 degrees?

A

20 seconds

24
Q

What should I do if air is not coming out of one or more of my fuel cool scoops

A

Terminate APU run and troubleshoot

25
Q

ACL coolant supply temperature, during LM 4 (external power, no external cooling) operations should not exceed?

A

90 F

26
Q

Stop operations if fuel inlet temperatures exceed?

A

165 F

27
Q

What must you do if you turn on the battery switch and a fire switch light is depressed?

A

Reset switch between Engine switches

28
Q

What are the three modes for starting APU’s?

A

Alert, Normal, Manual

29
Q

How many fire bottles are there on the B-1 and where are they located?

A

There are 8
L OWF = 2
R OWF = 2
L Nacelle = 2
R Nacelle = 2

30
Q

What must be done prior to running APU’s if the Engine Instrument SCDU is removed?

A

Parking Brakes

31
Q

On Elec Panel, after BATT switch is set to AUTO/ON, what should my voltage read?

A

25 (+/-5) VDC

32
Q

What position on the FLT CONTR PWR panel must be the ALRER WG SWP switch be in prior to coupling & decoupling APU’s?

A

Hold

33
Q

What is the power source for the FIRE WARNING & EXTINGUISHING panel and the OWF/FIRE DETR panel?

A

Aft & fwd DC BATTERY

34
Q

How long can you run with hot lights?

A

4 minutes

35
Q

What are your main fuel tank limitations?

A

6100 - 10500 lbs per tank

36
Q

What should the main fuel tank valves be set to?

A

Closed

37
Q

What do you do if you get a MLG aural unsafe tone?

A

Shut down

38
Q

At what oil temperatures will the ECA shut down the APU?

A

Over 290 F

39
Q

The CRSVR Air switch should be in what position?

A

OFF

40
Q

Prior to APU start, what position do you set the TRANS pumps to on the Fuel Management Panel?

A

OFF

APU (1 decks)

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