Admission > airport : The speed exceeds vmo/mmo and according to the type of aeroplane the overspeed ?

Question 54-1 : 3 2 1 2 3 1 2

exemple 154 3. — Cqb15 august 2012...the stall protection function and the overspeed protection function apply to both mechanical/conventionnal and fly by wire control systems but other functions e g pitch or bank limitation can only apply to fly by wire control systems. ebbr1000 .i asked the question to a instructor and pilot for his the good reaction is reduce thrust to idle to decrease the speed in the answer if we inhibit the trim in the nose down position the speed will increase maybe is not good written ..this is a protection function when do we want to descend at vmo/mmo limits when we have a loss of cabin pressurization .the protection can not reduce thrust without the pilots decision in some case you need to maintain a certain amount of thrust to run correctly the anti icing system which picks up some air from the compressor .this system will invite the pilot to take decision such as extend the speed brakes decrease thrust or reduce the rate of descent 3.

The yaw damper system sends a motion order to the rudder if the yawing rate of ?

Question 54-2 : Is not constant is constant is > 0 only is > 1 only

exemple 158 is not constant. — is not constant.

The flight envelope protection system prevents the aircraft from exceeding the ?

Question 54-3 : 2 3 4 5 1 2 3 4 5 2 5 1 2 4

The yaw damper system is operative ?

Question 54-4 : During manual or automatic flight only if the flight director is engaged only if the autopilot is engaged only when flying manually

exemple 166 during manual or automatic flight. — during manual or automatic flight.

The flight envelope protection function s consist s in.1 automatically ?

Question 54-5 : 2 1 2 1 3 2 3 4

The flight envelope protection fep can include.1 stall protection.2 the ?

Question 54-6 : 1 2 1 2 3 2 3 1

exemple 174 1, 2. — .the stall protection function and the overspeed protection function of the flight envelope protection fep apply to both mechanical/conventionnal and fly by wire control systems but other functions e g pitch or bank limitation can only apply to fly by wire control systems 1, 2.

At high angles of attack and according to the type of aeroplane the stall ?

Question 54-7 : 1 3 1 2 3 1 2 3

exemple 178 1, 3. — Cqb15 august 2012...a stall protection system is a part of the flight envelope protection fep of an aircraft .on airbus you have the 'alpha floor' protection which is an auto throttle mode that selects full thrust to prevent the aircraft from stalling .the max angle of attack is alpha max and in normal law normal flight mode this can not be exceded 1, 3.

The automatic power control system autothrottle of a transport airplane has the ?

Question 54-8 : 1 2 4 1 2 3 5 2 4 1 4 5

An airplane is cruising at fl 220 the auto throttle maintains a constant cas if ?

Question 54-9 : Remains constant increases decreases decreases if oat is lower than standard temperature increases in the opposite case

exemple 186 remains constant. — .oat outside air temperature.if temperature changes the tas will change but cas and mach number will remain constant.cas = 1/2 rho tas². the auto throttle maintains a constant cas thus if oat decreases = 'rho' will increase .in order to maintains a constant cas tas will decrease cas will not change.the decrease in temperature will also decrease the local speed of sound mach formula is .m = tas/lss..tas must decrease if oat decreases to maintain a constant cas .lss decreases if oat decreases.the mach number remains constant remains constant.

An aeroplane is in steady descent the auto throttle maintains a constant ?

Question 54-10 : Decreases increases if the static temperature is lower than the standard temperature decreases if higher increases remains constant

.for those questions use the very simple 'ertm' diagram. 1037..the cas line is vertical because the question states descent constant calibrated airspeed. ertm for e as/ r as rectified air speed or cas / t as/ m ach.cas = 1/2 rho v².density will increase during descent and in order to maintain constant cas only v tas can be reduced.mach = tas / local speed of sound.local speed of sound varies only with temperature and the question states total temperature remains constant thus if tas decreases and lss remains constant the mach number decreases

An aeroplane is in steady cruise at flight level 270 the auto throttle ?

Question 54-11 : Remains constant decreases if the outside temperature is higher than the standard temperature increases if lower decreases increases

exemple 194 remains constant. — If oat increases density decreases with higher temperature air is expanding density is decreased.cas = 1/2 x density x tas²....cas is constant and density decreases then tas must increase...mach = tas / local speed of sound....local speed of sound varies only with temperature lss varies with the square root of absolute temperature .formula lss = 39 x square root of oat+273 thus if tas increases and lss increases the mach number remains constant remains constant.

An aeroplane is in steady climb the auto throttle maintains a constant ?

Question 54-12 : Increases decreases decreases if the static temperature is lower than the standard temperature remains constant

exemple 198 increases. — .for those questions use the very simple 'ertm' diagram . 1037.cas = 1/2 rho tas².rho is decreasing when altitude increases to maintain a constant cas tas must increases.mach = tas / local speed of sound.local speed of sound varies only with temperature and the question states 'total temperature remains constant' thus lss remains constant.since tas increases mach number will increase increases.

An aircraft is equipped with an autopilot and an auto throttle when the ?

Question 54-13 : The indicated airspeed ias is maintained constant by the auto throttle system the true airspeed tas is maintained constant by the autopilot by means of elevator the true airspeed tas is maintained constant by the auto throttle system the indicated airspeed ias is maintained constant by the autopilot by means of elevator

exemple 202 the indicated airspeed (ias) is maintained constant by the auto-throttle system. — .basically the auto throttle will maintain speed in most cases but in a climb or the take off the auto throttle might be asked to maintain n1 or an epr but the usual situation in the cruise where we are likey to have alt hold engaged is that the altitude will be held by the pitch channel and speed maintained by the auto throttle setting .obviously maintaining altitude and airspeed with just the pitch channel is not an option one would have to have auto throttle to be able to do two things at once .what the question is trying to get over is that unlike straight and level flight of a light aircraft power is speed and pitch is altitude the indicated airspeed (ias) is maintained constant by the auto-throttle system.

During the ground run take off phase the auto throttles allow to ?

Question 54-14 : Hold n1 hold ias maintain v2 under 1 500 ft hold and maintain the mach number

exemple 206 hold n1. — During take off autothrottle will hold constant thrust and allow the aircraft to accelerate hold n1.

The auto throttles enables to hold .1 a true airspeed. 2 a mach number. 3 an ?

Question 54-15 : 2 3 4 1 2 3 4 1 2 3 1 2 4

exemple 210 2, 3, 4. — .there are two parameters that an a/t autothrottle can maintain or try to attain speed and thrust.in speed mode the throttle is positioned to attain a set target speed tas or mach this mode controls aircraft speed within safe operating margins .for example if the pilot selects a target speed which is slower than stall speed or a speed faster than maximum speed a/t will maintain a speed closest to the target speed that is within the range of safe speeds.in thrust mode the engine is maintained at a fixed power setting n1 according to the different flight phases for example during takeoff a/t maintains a constant takeoff power until takeoff mode is finished .during climb a/t maintains a constant climb power in descent a/t retards the throttle to idle position and so on when a/t is working in thrust mode speed is controlled by pitch or the control column and not protected by a/t 2, 3, 4.

The purpose of auto throttle is ?

Question 54-16 : To maintain constant engine power or aeroplane speed to automatically shut down an engine if it is at too high temperature to deactivate manual throttles and transfer engine control to auto pilot to synchronize engines to avoid 'yawing'

exemple 214 to maintain constant engine power or aeroplane speed. — to maintain constant engine power or aeroplane speed.

The auto throttle system of a transport aeroplane has the following mode s .1 ?

Question 54-17 : 1 2 4 1 2 3 5 2 4 1 4 5

The auto throttle . 1 can capture and maintain the n1 rpm. 2 can capture and ?

Question 54-18 : 1 3 2 3 1 4 1 3 4

When cruising the autothrottle system can be engaged in the following mode s ?

Question 54-19 : 2 3 2 1 2 1 2 3

The autothrottle system ?

Question 54-20 : Can be used for take off can be engaged in the tas mode holding of constant tas during a final approach can be engaged in the gs mode holding of constant ground speed during a final approach is automatically disconnected when the aircraft is on the ground

exemple 230 can be used for take-off. — can be used for take-off.

During a manual ils final approach the auto throttle ?

Question 54-21 : Can be operated in the speed mode holding of ias can be operated in the n1 epr mode holding of n1 or epr can not be engaged because autopilot is not engaged is not available

exemple 234 can be operated in the speed mode (holding of ias). — can be operated in the speed mode (holding of ias).

During an automatic ils final approach the auto throttle ?

Question 54-22 : Can be operated in the speed mode holding of ias can be operated in the n1 / epr mode holding of n1 or epr can be operated in the speed holding of ias or n1 holding of n1 modes is not available

exemple 238 can be operated in the speed mode (holding of ias). — .your approach speed must be stabilized during an automatic ils final approach speed is maintained by the speed mode you select a speed on the mcp mode control panel and you push the spd button .you are not looking for a specific thrust during the approach can be operated in the speed mode (holding of ias).

During a climb with the autopilot engaged in the v/s mode holding of vertical ?

Question 54-23 : Can be operated in the speed mode holding of ias can be operated in the n1 / epr mode holding of n1 or epr can be operated in the speed holding of ias or n1 holding of n1 modes is not available

.the v/s mode commands pitch to hold selected vertical speed and engages a/t in speed mode to hold selected airspeed on the boeing 737 'speed mode' engages automatically when v/s engages

Considering a modern thrust computer during a steady climb ?

Question 54-24 : N1 is automatically adjusted as aircraft climbs n1 is automatically adjusted as aircraft climbs and n2 remains constant n1 and n2 remain constant n2 is automatically adjusted as aircraft climbs and n1 remains constant

exemple 246 n1 is automatically adjusted as aircraft climbs. — n1 is automatically adjusted as aircraft climbs.

When an auto throttle system a/thr is engaged in speed mode a/thr is ?

Question 54-25 : Active armed disarmed disconnected

exemple 250 active. — .speed mode autothrottle holds speed in ias/mach display or a performance or limit speed active.

When an automatic thrust control system is in the thrust mode ?

Question 54-26 : Thrust is set to a computed thrust according to a performance database thrust is adjusted to maintain a selected speed auto throttle or auto thrust is disconnected thrust is adjusted to maintain a selected vertical speed

exemple 254 thrust is set to a computed thrust according to a performance database. — .there are two parameters that an a/t autothrottle can maintain or try to attain speed and thrust.in speed mode the throttle is positioned to attain a set target speed tas or mach this mode controls aircraft speed within safe operating margins .for example if the pilot selects a target speed which is slower than stall speed or a speed faster than maximum speed a/t will maintain a speed closest to the target speed that is within the range of safe speeds.in thrust mode the engine is maintained at a fixed power setting n1 according to the different flight phases for example during takeoff a/t maintains a constant takeoff power until takeoff mode is finished .during climb a/t maintains a constant climb power in descent a/t retards the throttle to idle position and so on when a/t is working in thrust mode speed is controlled by pitch or the control column and not protected by a/t thrust is set to a computed thrust according to a performance database.

An automatic thrust control system can be .1 armed.2 active.3 ?

Question 54-27 : 1 2 3 1 3 1 3 1 2

exemple 258 1, 2, 3. — Revised ecqb03 july 2016 1, 2, 3.

When an automatic thrust control system is in the speed mode ?

Question 54-28 : It maintains the selected airspeed it maintains the selected vertical speed thrust is constant and the autopilot adjusts the pitch to maintain the selected airspeed thrust is constant and the pilot manually adjusts the pitch to maintain the selected airspeed

exemple 262 it maintains the selected airspeed. — Revised ecqb03 july 2016..speed mode autothrottle holds speed in ias/mach display or a performance or limit speed.there are two parameters that an a/t autothrottle can maintain or try to attain speed and thrust.in speed mode the throttle is positioned to attain a set target speed tas or mach this mode controls aircraft speed within safe operating margins .for example if the pilot selects a target speed which is slower than stall speed or a speed faster than maximum speed a/t will maintain a speed closest to the target speed that is within the range of safe speeds.in thrust mode the engine is maintained at a fixed power setting n1 according to the different flight phases for example during takeoff a/t maintains a constant takeoff power until takeoff mode is finished .during climb a/t maintains a constant climb power in descent a/t retards the throttle to idle position and so on when a/t is working in thrust mode speed is controlled by pitch or the control column and not protected by a/t it maintains the selected airspeed.

Landing shall be considered as having been carried out automatically when the ?

Question 54-29 : During ground roll during the flare 100 ft above the threshold 200 ft above the threshold

exemple 266 during ground roll. — during ground roll.

A landing is performed automatically when the autopilot and auto throttle ?

Question 54-30 : During the landing roll and sometimes until the aircraft comes to a complete stop until reaching decision height until reaching 100 ft height at which point the autopilot is automatically disconnected until the flare

exemple 270 during the landing roll and sometimes until the aircraft comes to a complete stop. — during the landing roll and sometimes until the aircraft comes to a complete stop.

The cpdlc messages may concerne.1 route modifications.2 speed changes.3 ?

Question 54-31 : 1 2 3 4 1 2 4 1 2 3 4

exemple 274 1, 2, 3, 4. — .cpdlc controller pilot data link communications 1, 2, 3, 4.

The cpdlc function consists in exchanging messages relative to.1 route ?

Question 54-32 : 1 2 3 4 1 3 4 3 2 4

exemple 278 1, 2, 3, 4. — .cpdlc controller pilot data link communications 1, 2, 3, 4.

The systems that can be connected to the communication management unit cmu are ?

Question 54-33 : 2 3 4 5 1 3 4 2 4 5 1 3

The systems that can be connected to the communication management unit cmu are ?

Question 54-34 : 2 3 4 1 3 4 2 3 2 4

The basic on board datalink communication system is typically composed by the ?

Question 54-35 : 1 2 3 1 3 1 2 2 3

The different types of ads contracts can be.1 periodic at periodic time ?

Question 54-36 : 1 2 3 1 3 2 3 1 2

exemple 294 1, 2, 3. — Ads automatic dependant surveillance is what we call a fans future air navigation systems it refers to the icao cns/atm concept communication navigation surveillance/ air traffic management .ads afn ats facility notification and cpdlc controller pilot data link communications are parts of the fans a applications.the different types of ads contracts are. periodic.. on demand.. on event.. emergency mode..the controller can modify the 'periodic' 'on demand' and 'on event' contracts or the parameters of these contracts optional data groups and that these modifications do not require crew notification .the ads contracts the basic concept of the ads application is that the ground system will set up a contract with the aircraft such that the aircraft will automatically provide information obtained from its own on board sensors and pass this information to the ground system under specific circumstances dictated by the ground system except in emergencies.contracts are initiated by the ground and can not be modified by the pilot.note that the contract is a 'dynamic agreement' between the ground system and the aircraft it is not as one could think a piece of paper that has some legal value. 1010. 1, 2, 3.

The on board communication devices to transmit and receive datalink ?

Question 54-37 : 1 2 3 1 3 1 2

exemple 298 1, 2, 3. — .this question also exists at the exam under the following form .the acars digital datalink communications system can use the following means for the data transmission .sat com hf vhf' 1, 2, 3.

The datalink communications between the aircraft and the ground can be ?

Question 54-38 : Acars cvr egpws fws

exemple 302 acars. — .the acars system is used to transmit non vocal messages between an aircraft and the ground by vhf or satellite communication it can be used in particular by operators to transmit information in real time meteorological data flight progress information etc.there are three major categories of message that can be transmitted . non vocal atc communication messages with an air traffic control centre cpdlc in particular . operational communication messages aoc with the operator's operations centre. maintenance messages exclusively from the aircraft to the maintenance centre.acars messages are transmitted as a priority by vhf or by satellite if vhf is unavailable they pass through an acars service provider's server arinc or sita before arriving at the operator's centre acars.

A mayday datalink message can be sent to the atc via the ?

Question 54-39 : Cpdlc application ads application afn application acas aircraft collision avoidance system application

exemple 306 cpdlc application. — .data links are used for year for tower and en route applications based on the dating acars protocols the european union has mandated the use of cpdlc in its upper airspace by 2013.cpdlc stands for controller pilot data link communication .cpdlc application consists for the controller and the pilot the exchange atc requests and instructions over datalink rather than the vhf or hf radio .therefore a mayday datalink message can be sent to the atc via the cpdlc application cpdlc application.

The acars allows air/ground datalink communications for ?

Question 54-40 : Airline operational and air traffic communications aoc and atc airline operational communication only aoc air traffic control communication only atc airline operational and public communications aoc and pc

exemple 310 airline operational and air traffic communications (aoc and atc). — .the acars system is used to transmit non vocal messages between an aircraft and the ground by vhf or satellite communication it can be used in particular by operators to transmit information in real time meteorological data flight progress information etc.there are three major categories of message that can be transmitted . non vocal atc communication messages with an air traffic control centre cpdlc in particular . operational communication messages aoc with the operator's operations centre. maintenance messages exclusively from the aircraft to the maintenance centre.acars messages are transmitted as a priority by vhf or by satellite if vhf is unavailable they pass through an acars service provider's server arinc or sita before arriving at the operator's centre airline operational and air traffic communications (aoc and atc).

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