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M1 and M2 Maintenance > Bombardier CRJ200 Flight Controls > Flashcards

Bombardier CRJ200 Flight Controls Flashcards

1
Q

ATA Subsection for Ailerons

A

27-10-00

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2
Q

ATA Subsection for Rudder

A

27-20-00

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3
Q

ATA Subsection for Elevator

A

27-30-00

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4
Q

ATA Subsection for Stall Protection System

A

27-35-00

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5
Q

ATA Subsection for Hor Stab

A

27-40-00

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6
Q

ATA Subsection for Flaps

A

27-50-00

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7
Q

ATA Subsection for Spoilers

A

27-60-00

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8
Q

How are Ailerons, Rudder, Elevators controlled and actuated on the CRJ200?

A

PCU (Mechanically controlled cables), Hydraulically actuated

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9
Q

How many Hyd. systems are on the crj?

A

Three independent hydraulic systems, (Hyd system 3 can run all systems)

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10
Q

How are Spoilers, Flight spoilers, and Ground Spoilers controlled and actuated?

A

Electrically Controlled, Hydraulically actuated

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11
Q

How are flaps and horizontal stabilizer controlled and actuated?

A

Electrically controlled and electrically actuated

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12
Q

What are the failsafe parameters of the primary flight control surfaces?

A

Control of aircraft can be kept if:

1) A component does not move freely or is disconnected
2) Loss of electrical power
3) Loss of hyd sys press in up to 2/3 systems
4) Shutdown of engine

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13
Q

Can control of the aircraft be kept if any or all of the secondary flight control surfaces do not operate?

A

Yes

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14
Q

Will Hyd. Power will be available in the event of engine failure and electrical failure?

A

Yes

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15
Q

How does the CRJ incorporate artificial feel?

A

Uses artificial feel and centering units incorporated into each primary flight control system.

The artificial feel and centering units are cam follower spring devices which increase the control feel resistance.

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16
Q

Where are the positions of the primary and secondary flight control surfaces shown in terms of displays?

A

EICAS (both prim and sec displays)

17
Q

How is Aileron Roll Control achieved on the crj?

A

Controlled by 2 Hyd Operated ailerons

2 PCU’s per aileron connected to a common interconnecting input linkage

An aileron position transmitter (RVDT) will send an electrical signal to the EICAS

18
Q

How are the handwheels connected together?

A

Linked by a cable system and an interconnecting torque tube that incoroporates a roll disconnect mechanism in case of a jammed circuit

19
Q

How is aileron trim achieved?

A

Using an electronically driven actuator linked to the aft quadrants by a push/pull-Rod/Bellcrank system

20
Q

How is control surface flutter prevented?

A

A flutter dampener is installed on each aileron in the event of a loss of hyd power to the aileron PCU’s during flight. Acts like a gust lock on the ground.

21
Q

What does a Tension Regulator do?

A

Transmits mechanical input from the wing cable circuit to the PCU connecting arm assembly. The regulator adjusts to maintain a constant tension on the wing control cable circuit to allow for wing flexing and temperature changes.

22
Q

What is the purpose of Spoilers?

A

Roll assist, ground lift dumping, speedbraking

23
Q

How are spoilers powered?

A

By PCU’s through the SECU

24
Q

Where does the SECU receive input signals from for Roll assist?

A

Roll Control Input Models (RCIM’s) in the aileron control cable when the pilot rotates its handwheel. (In this case the RCIM is an RVDT (Rotary Variable Differential Transducer)

25
Q

Where is the flight spoiler control level located?

A

Located on the center instrument panel in the flight deck

26
Q

How do the spoilers deploy on landing?

A

SECU recieves a signal from the spoiler/thrust reverser panel AND a WOW signal AND if the main wheels are spinning fast enough AND the thrust reversers are retracted, all spoilers deploy

27
Q

How is the rudder powered?

A

Physically moved by three PCU’s. Each PCU is powered by One of Three independent Hydraulic Systems. For failsafe redundancy.

28
Q
A

M1 and M2 Maintenance (22 decks)

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