E190 - Flight controls Flashcards by Steven Poelmans

How many ACE’s are installed ?

Nine3 P-ACE’s, 2 SF-ACE’s, 1 HS-ACE and 3 S-ACE’s.

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Which FCM’s control the MFS ?

FCM 1, 3 and 4.

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What is the function of the FCM unit ?

They provide software based assistance to theP-ACE, and they are required for normal operation of the flight control system.

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Where are the FCM’s located ?

FCM 1 and 2 in MAU 1 .FCM 3 and 4 in MAU 3.

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What is the primary cause of direct mode operation ?

Loss of data from all FCM (fe. no airspeed input) OR multiple ACE failures.

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What happens if both the CPT and F/O use the pitch trim at the same time ?

Cpt’s trim switch has priority.

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What happens with the stabilizer if you press the AP/trim disconnect button ?

It disables both HS-ACE channels.

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What are the flap positions (in degrees) ?

F1 - 15° - 7°F2- 15° - 10°F3- 15° - 20°F4- 25° - 20° (gated)F5- 25° - 20°FULL- 25° - 37°

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What happens if you push the TRIM SYS 1(2) CUTOUT switch ?

It disables HS-ACE channel 1/2.

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Manual pilot trim commands are always limited to:

3 sec.

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What are the possible indication values for a flaps/slats jam ?

Slats: 0 - 3 - FULLFLAPS: 0 - 1 - 2 - 4 - FULL

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In case of a S/F jam the … value is always indicated.

Lower.

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The 3 S-ACE’s are incorporated in:Each S-ACE controls:

FCM 1, 3 and 4One pair of MF-spoilers.

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The FCM units communicate with the P-ACE’s through the:

CAN BUS.

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The FCM units communicate with each other and other avionics through the:

ASCB.

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If you switch to DIRECT mode:

The normal channel of the P-ACE switches to the direct mode of the standby P-ACE.

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The PBIT consists of a:The PBIT expires after:

Hydraulic and electric PBIT50 hrs.

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The electrical PBIT automatically starts when the airplane is powered by … and takes about … minutes to complete.It will be interrupted if:

Any AC source3min- Any ACMP is turned on, or- AC power is interrupted, or- FCP switches are cycled

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The hydraulic PBIT automatically starts when … and takes about … minutes to complete. ItIt will be interrupted if:It will not be performed if:

All hydraulic systems are pressurized1 minuteAny flight control surface is movedHydraulic temp < 10°, unless the PBIT is expired.

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If the hydraulic PBIT is interrupted:

All three hydraulic systems must be depressurised and then again pressurized.

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In case of complete failure of the normal and emergency electrical system, the FBW system:

has a back-up battery that powers the flight controls for a minimum of 15 min. This battery is charged by DC ESS BUS 3.

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Odd-even day change rule:

For the rudder, aileron and stabilizer, that always have two channels this rule is used to change the active channel depending on the date.Odd days: upper rudder, RH elevator actuators.

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Except for the odd-even rule, the active elevator actuators are also swapped:

Every time the elevator system is powered up.

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True or false ? In case of a hydraulic failure, the standby PCUs for the elevator become active (other hydraulic systems).

True.

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What happens if you have a jammed elevator actuator ?

The elevator remains fixed, the other elevator is still available.

True or false. If you switch the elevator control to DIRECT mode, only the (new) active P-ACE channels are set to DIRECT mode.

False. All P-ACE's are operated in DIRECT mode.

What is elevator thrust compensation (ETC) ?

The FCMs command max 5° of elevator input to correct of increasing/decreasing thrust.

What is ETC off-load ?

The ETC elevator offset is off-loaded to the stabilizer.

The TSA for T/O is enabled < ... ft HAGL. This is estimated by means of the ... The maximum pitch down correction is ... °.

20 ft HAGL vertical speed8°.

The TSA for landing is enabled < ... ft HAGL. This is measured by means of the ... The maximum pitch down correction is ... °.

70 ft HAGLradio altimeters8°.

Is TSA for landing enabled for F1-F4 ?

No. Only for F5 - FULL.

Does the AOA limiter has priority over TSA ?

Yes.

Does TSA offer full protection against tail-strikes ?

How many independent feel units are installed on the elevator control ? Is feel still available in case of column separation ?

Two. Yes, although elevator feel is halved.

Is it possible to re-engage elevator disconnection (by actuating the disconnect mechanism) ?

No.

The HSA is driven by two.... that are powered by the HS-ACE through two ... in a ... / ... configuration.

AC motorschannelsactive / standby.

The HS-ACE can receive signals from:

- Trim switches- Backup trim switches- FCM

What happens if only one of the two trim switches on the control wheel give a signal for > 7 sec ?

The trim switch is disabled.

True or false: In case of stick shaker activation, the HS-ACE is prevented from responding to any pitch trim command by a stick shaker signal from the AFCS.

True.

What is the priority logic for the HS-ACE ?

Backup switchesCPT F/OFCM (autopilot) trim

The autopilot trim works through the:

FCM.

Is it possible to engage the AP if autopilot trim is inop ?

No.

In an electrical emergency, the HS-ACE:

Works at a low speed (both manual and autopilot trim) , and only through HS-ACE channel 2.

The elevators are hydraulically powered by:

Systems 1 - 2 - 2 - 3 (from L to R actuators).

The ailerons are hydraulically powered by:

System 3 - outboard actuatorsSystem 2 - inboard actuators

If the L aileron (CPT side) is jammed (what happens with artificial feel ? Roll trim ? MFS ?):

R aileron remains available, artificial feel and roll trim are lost, MFS #4 still available.

If the R aileron (F/O side) is jammed (what happens with artificial feel ? Roll trim ? MFS ?):

L aileron remains available, artificial feel and roll trim remain available, MFS #5 still available.

What happens in case of a disconnected aileron PCU ?

The aileron is still available, but force authority is halved.

True or false ? In normal mode, the MFS-deployment is reduced at high airspeed.

True.

What happens with the MFS in case of an FCM failure ?

The associated MFS (#3,#4 or #5) are in direct mode (no high altitude/speed functions,..)

The CPT's yoke controls which PCU's for the aileron, elevator and rudder ?

Aileron - L PCU'sElevator - L PCU'sRudder - Upper PCU.

Which P-ACE's are used for rudder control ?

P-ACE 1 and 3.

The rudder system in DIRECT mode has two modes of operating:

- low speed gain (F/S extended)- high speed gain (less authority).

What happens if the rudder pedal is blocked ?

Use of rudder is inop, FCM inputs are still available (high-level functions, yaw damper,...)

What happens if a rudder PCU is blocked ?

Rudder is blocked at the current position.

Two ... control the slats & flaps, each through two ... (one for the slats, one for the flaps) that controls the flaps and slat by operating a flaps and a slats ... .

SF-ACEschannelsPDU (power driver unit).

Each wing has ... slats and ... flaps.

4 slats (3 outboard, 1 inboard)2 flaps (1 outboard, 1 inboard).

If a new S/F position is selected, which moves first? Which retracts first?

Slats extend first,flaps retract first.

Every slat and every flap has ... actuators for operation.

two.

What happens if a skew is detected for the flaps / slaps ?

The FLAPS or SLATS FAIL msg appears, and that system is completely inop for the remainer of the flight.

What happens if an excessive load is detected on the PDU ?

The FLAPS or SLATS FAIL msg appears. Recycling the flaps or slats is possible for two times, than the affected system is de-energized as a protection.

Is it possible to extend flaps/slats in an electrical emergency, with the RAT deployed ? Is every S/F selection possible ?

Yes, although only one SF-ACE will be available, and flaps/slats will extend only at half speed. No, only up to S/F 3 (to maintain enough speed for the RAT).

True or false ? In the case of SLATS/FLAPS fail, some combinations of slats and flaps are not possible.

True.

All spoilers will deploy on the ground (WOW) when:They will retract again when:

- speed > 60 kts or ws > 45 kts, and- TLA < 26°- ws < 45 kts for more than 5 sec, or- TL's advanced.

The MFS deploy to ... degrees while the GS deploy to ... degrees of deployment.In flight the MFS deploy up to... degrees.

40 degrees60 degrees.30 degrees.

Are ground spoilers available in the DIRECTmode ? Are speed brakes available in the DIRECT mode ?

No.No.

Speedbrakes automatically retract when:

-S/F 2 or higher selected (config)- speed decreases below < 180 kts (speed)- TLA > 70 deg (G/A)

It is not to extend the speedbrakes when speed is 180 kts or below ?

No.