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Saab 2000 > Systems/Oral Questions > Flashcards

Systems/Oral Questions Flashcards

1
Q

What are the ac generators rated at

A

115/200 VAC 400 HZ APU

115/200 VAC 404-577 HZ ENG

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2
Q

What type of battery and voltage

A

Ni-Cad, 24 volt 27 amp hour

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3
Q

What do the inverters power

A

GPWS, FDR, CVR,

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4
Q

If you lose the L TRU what do you lose

A

Left utility bus

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5
Q

What happens in the DC system if a single AC gen

A

nothing, dc system can be supplied completely by one gen

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6
Q

“Batt mode only”

A

Loss of all TRU’s, only the batteries are powering the airplane

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7
Q

What powers the emergency lights

A

28 VDC emergency bus, if that’s also offline its powered by 3 batteries and will last for 10 min

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8
Q

What triggers the emergency lights to come on

A

Loss of the left main bus

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9
Q

What temp will the CRT’s be lost

A

110C you get a waring 115C they shutdown

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10
Q

When do the fuel boost pumps come on automatically

A

Condition lever moved to start, LH pump can be activated by the APU being started with the left engine not running, opposite engine running with crossed open.

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11
Q

Will losing the boost pump cause the engine to shutdown

A

No, the FPMU is capable of supplying the engine with sufficient fuel supply

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12
Q

What closes the firewall fuel valve

A

Condition lever to off or pulling the T handle

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13
Q

APU auto shut down in the air (3)

A

-Overspeed (108%)
-ESU Failure (electronic sequence unit)
-Failure of the speed signal

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14
Q

Auto Shutdown on the ground (8)

A

-ESU failure (electronic sequence unit)
-Loss of the speed signal
-APU fire
-Overspeed (108%)
-Over temp (712 degrees C)
-Low oil pressure
High oil temp

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15
Q

APU Autostart in flight

A

-Loss of an engine
-Powerloss -56%

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16
Q

Autostart on the ground (APU)

A

-Faulty WOW switch
-Landing gear circuit breakers being pulled
-Jacking the airplane

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17
Q

What type of engine is in the Saab

A

AE2100A

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18
Q

Shaft horsepower in MTOP and NTOP

A

MTOP: 4152
NTOP: 3738

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19
Q

What is APR

A

Automatic Power Reserve (APR), when armed will automatically increase the engine power output by approximately 11%

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20
Q

What is on the PMAD

FLAP

A

Powerplant mounted accessory drive (PMAD)

Fuel Pump Metering Unit
Lubrication pump
Air turbine starter
PMA (Permanent Magnet Alternator)

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21
Q

What’s on the GMAD

PEAPP

A

Prop high press oil pump/ovr speed
Engine driven hydraulic pump
AC Gen
PGB oil pump
PCU:(pitch control unit) non moving

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22
Q

Three parts of the engine

A

Power unit
Torque meter
PGB

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23
Q

Ignition System

A

Two igniters
PMA: powers FADEC and Exciter
Auto Relight
Shuts off engine if no light off in 8 sec
NG<56% no auto relight

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24
Q

Low Fuel temp

A

Comes on at <4 degrees at the engine

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25
Q

What powers FADEC

A

Primarily PMA, secondary 28 VDC

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26
Q

What does FADEC control

A

Fuel flow
Pitch of prop
Auto relight
ITT limiting
Overspeed protection (shutdown at 110 NG/111 NP
Communicates with opposite engine
Only one FADEC being used (A/B system)

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27
Q

How many FADECs

A

One system per engine, system has two separate boxes, dual channel

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28
Q

Override Switch for FADEC does what

A

“dumbs it down” only looks at fuel flow and NG. You would use this function if you were getting erratic uncommanded power changes

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29
Q

Palm Switches do what (5)

A

-GA/GA
-Sequences missed approach
-7-8 nose up
-Initiates TOGA (PWR mode)
-disconnects autopilot

30
Q

In TOGA what probe does FADEC get temp from? Normally?

A

Normally TAT, in TOGA T2

31
Q

Manually switching FADEC channel causes what

A

6% power change for 5 seconds

32
Q

Autofeather

A

Commanded by FADEC:
-Engine speed sensor at low power
-Engine torque at high power
Tells other engine not to feather
-sends APR signal to operating engine (if apr is on)

33
Q

What are the two methods of defueling

A

With boost pumps and suction
Just suction

34
Q

At what cabin altitude do the masks auto drop

A

13,500

35
Q

What type of hydro fluid

A

5606

36
Q

How long can you run the landing lights without the engines running on the ground

A

30 seconds

37
Q

How long must you leave power to the system after IRS power down to ensure they receive adequate position information

A

10 seconds

38
Q

How much oxygen must be on board for two crew and or 3 crew

A

-2 is 1050
-3 is 1450

39
Q

How many AOA’s to activate shaker/pusher

A

Shaker: 1 AOA
Pusher: 2 AOA

40
Q

Tailstrike will occur at approx what nose up attitude

A

10 degrees nose up

41
Q

Wheel sweep in turn (min pavement width

A

83 feet

42
Q

At 31,000 feet and max dp what is the approximate cabin alt

A

7500 feet

43
Q

Normal DP

A

7

44
Q

How long do the Flight data recorder and voice recorders record

A

Flight: 25 Hours
Voice: 30 min

45
Q

Prop Ground Clearance

A

18 inches

46
Q

What are the two levels of overspeed

A

Overspeed: 1144 (riding the gov)
H Overspeed: 1166

47
Q

What triggers the emergency lights, how are they powered, and what charges them

A

Emergency lights are triggered by loss of the L main DC bus, they are powered by the emergency bus (if powered) or their own batt packs. The batt packs are charged by the emergency bus.

48
Q

What are some hot battery bus items

A

-Flight deck dome lights
-Clocks 1/2
-T handle items
-Fueling pannel
-External power control
-Extinguishing L/R shots 1/2 (squibs)
-Cargo extinguishing
-APU extinguishing
-ELT transmit indicator
-EICAS L/R DCU STBY power
-Potable water control/indication
-ACARS
-Emergency Pitch Trim
-APU starting motor
-Stair lights
-Cabin lights
-Cargo/service comp lights

49
Q

What are the users of the hydraulic system

A

Brakes, Flaps, Nose wheel steering, Gear, Elevator, Rudder, Emergency Pitch trim

50
Q

How many accumulators in the hydro system

A

5 total: 2 on the left, 3 on the right

51
Q

What’s on the left hydro system

A

Outboard brakes, Emergency gear extension, left outboard elevator, right inboard elevator, Left rudder (actuator 1)

52
Q

What’s on the right hydro system

A

Flaps, Inboard brakes, nose wheel steering, nose gear, mains, right elevator outboard, right rudder (2)

53
Q

What’s the only user of the center system

A

Left inboard elevator

54
Q

What’s a velocity fuse/SOV

A

Activated by a massive or rapid fluid loss, the valve closes trying to prevent total loss of fluid

55
Q

If the Left SOV (velocity fuse) closed what would you lose

A

Potentially the emergency gear extension and outboard brakes (if the accumulator was loosing pressure

56
Q

If the Right SOV (velocity fuse) closed what would you lose

A

Nose gear extension/ retractions, Nose wheel steering, Inboard brakes (potentially), and the flaps.

57
Q

Tell me about the C/R Hydro Pump

A

DC powered, one motor driving two pumps Integrated hydraulic package (IHP), one pump runs the center system one pump on standby to support the right system

58
Q

What kind of flaps

A

single slotted

59
Q

What’s the blowback feature of the flaps

A

In an overspeed condition the flaps automatically retract to a safe setting
(Uses pressure sensor)

60
Q

What is AFR

A

Auto flap retract (AFR) automatically retracts the flaps to 15 to help get the weight on the tires and reduce ground roll. They retract at 2x the normal rate signaled by antiskid reaching 25 kts wheel speed

61
Q

What are the 5 PECU input modifications (feelings)

A

-Stick to gearing vs KIAS: reduces elevator travel with increase in speed
-Downspring: Elevator down command for a speed decrease and an up command for speed increase
-Bob weight: Increased stick force with increased g load
-Trim weight vs KIAS
-Flap Movement

62
Q

What are the required conditions for PBIT

A

-<40 KIAS (if over defaults to CBIT)
-L/R gen online
-Weight on wheels

63
Q

Where are the TRU’s located

A

Left and center are on the left side, right is on the right side

64
Q

How is Wild ac converted to dc

A

TRUs

65
Q

Battery low level waring

A

<16 volts

66
Q

How is the landing gear retracted/extended if the right SOV is activated

A

The nose gear cannot be extended or retracted under this condition (emergency extension). The mains are retracted/ extended normally by a signal from the landing gear selector telling a transfer valve to open allowing normal extension and retraction of mains only

67
Q

How many full brake actuations are provided by the brake accumulator

A

6

68
Q

When will the white gear arrows change to amber

A

takes longer than 20 seconds for the gears to reach up and locked

69
Q

What is the purpose of the nose wheel brake

A

nose steering brake is activated by an uncomanded deflection of the nose wheel and limits it to 20 degrees

70
Q

How does antiskid work

A

Compares wheel speeds within the pairs, if it detects slipping it will release the brakes on the skidding tire and its counterpart (left outboard, right outboard) its inoperative below 10 kts and active at 50 kts wheel speed in 3 seconds

71
Q

What supplies pax oxygen

A

oxygen generators (chemical reaction). pulling down the hose activates the flow, and will run for approx 30 min.

Saab 2000 (7 decks)

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