Structures Flashcards
Where is o2 botttle and charging
Left aft side of aircraft
Airstairs door, eddy current damper, where is it and what does it do, avionics batt disconnected can freefall
It’s based in door, controlled by ? LGECU i think
Where is door switch and what bus battery
Door switch l/h of door outside and r/h of door inside, powered up only, uses current to motor to slow door on extension,got to be battery bus or external
The actuator uses a brushless DC motor which is connected to a planetary gearbox and slip clutch and to the output shaft. The motor is energized during the door close sequence which takes 18 seconds maximum.
How many times to open/close door in 5 mins
3
Sensor on door for for open closed- does this effect steering
Yes cancels steering,through LGECU
How does door interact with steering
Through sensor to the computer-not sure what, THROUGH LGECU, has 3 prox switches
Ems cdu what is it and what does it do
Pilots heater mats
What is OMS onboard Maint system
It’s the EICAS
What power and charges ELT and buzzer
Has internal battery and buzzer will sound when its selected on
Where is electric actuator for door and how is it powered
Electric motor is sited in door, maybe apu battery powers it ,switch is used to close the passenger door with electrical power, when DC or AC is available.but is a dc brushless motor
How does damper work on door as its opened
When the door is opened and the motor is not energized, an eddy current damper controls the speed. The door opening time is 7.0/8.5 seconds (10 seconds maximum). Before full open, the proximity switch energizes the slowdown circuit, which decreases speed to 12.5 degrees/second maximum. The slip clutch prevents the output shaft from being overdriven. A thermal switch is attached to the motor to remove voltage if the motor becomes too hot.
What is vent flap used for in door
When handle is moved springs help to open flap The flap is held open by four tension springs and is driven shut by a cam face on the aft G-latch via a series of levers during the final locking sequence. The design is such that only two springs are required to retain the vent flap in the open position. In the event of residual cabin pressure or icing conditions, during door deployment, the vent flap is pulled open by a direct link to the torque tube prior to full door lift, via a cable assembly.
How does tensator drum work on door
The tensator assembly comprises a single torque drum mounted to the airstairs middle shaft and four tensator springs each housed in a tensator drum. The springs are made of steel and measure over 15 ft (4.57 m) in length when fully extended. As the door is lowered, the airstairs middle shaft, under action of the two fuselage mounted cables, rotates. It causes the torque drum to draw each of the four tensator springs out of their respective drums and around the larger drum. The uncoiling of the tensator springs creates both a resistance of the falling door and a reserve of potential energy to assist in door closing.
What type of door is overwing exit
There is one emergency exit on the right side of the fuselage. This is a plug-type door that you can open from the inner or outer side of the fuselage.
Are prox sensors on top of emergency exit door
A proximity sensor is installed in the top center of the overwing emergency exit opening. An EICAS caution message R EMER EXIT will be displayed if the exit is open.
28 secs after t/o brakes ,gear symbology in ECAM are removed
Yes is disabled on EICAS
What is fuse skin made out of
The fuselage is a semimonocoque assembly. It has five sections connected together with butt straps, doublers and stringer splices. The fuselage skin is made of chemically milled aluminum alloy with aluminum alloy frames and stringers. The fuselage has attachments for the empennage/tail, the engine support structure and pylons, and the nose landing gear. The wings attach to a wing box at the bottom of the center fuselage. The forward fuselage and the center fuselage have a constant diameter of 106 in. (2.69 m). Aerodynamic fairings for the nose and tail complete the fuselage.
What is press diff
3500 ft at 51000
What station is aft press bulkhead
Sta 861;00
Is fwd press b/h fs; 202;75
Yes
Difference between a door and a panel
Door has handle
Fuselage barrels
Transition barrel with door, constant barrel 5 windows after
What material is nacelle and pylon made from
The primary structure includes the nose, the middle, the rear structure and the engine mount support spars. The nose and middle structures are made from aluminum alloy. All the connections from the aircraft to the engine pass through the firewall. The rear structure is made of a set of Kevlar ribs held together with rivets.
The intake cowl, upper and lower cowl doors and exhaust unit are mostly carbon fiber composite structures. The fixed cowl is titanium. All of the nacelle outer surface carbon fiber composite parts have a preimpregnated copper mesh outer lamination to shield electronic system against high intensity radiated fields (HIRFs) interference during lightning strike.
What is minimum fuel for tow
5000lbs
What type of hf is it
Shunt type coupler
Do you tow aircraft if window is removed
No-its part of structure
Is the wing primary structure
Yes it carries the load of the aircraft
The outer wing is attached to the center wing box with the attachment fittings at the chords of the root ribs. The wing structure holds the auxiliary structure, the attachment fittings, and the flight control surfaces. The wing is divided into three zones: inboard, midwing, and outboard.
What are window properties
The windows in the aircraft include the flight compartment and passenger compartment windows. The windows are resistant to ambient pressure conditions. These conditions relate to a range of altitudes from 1000 ft below sea level to 51,000 ft above sea level. The windows have pressure seals to keep cabin pressurization, and they also have moisture seals to give protection to the crew compartment and the cabin from weather elements. The moisture seal also protects internal components in the transparent plies. The left and right side windshields and windows in the flight compartment give the crew sufficient forward and side vision. These windows have an anti-ice, defog, and demist system. There are 13 passenger compartment windows on each side of the fuselage. The passenger compartment windows are equal in dimension, shape, and material.
How many bushings does window have
The inboard retainer is a ring with retained nuts. The nuts align with the inner row of holes in the outboard retainer. The bolts that attach the plies to the outboard retainer go into the nuts in the inboard retainer. There are two sets of bushings. One set of 51 bushings go into the attachment holes that include the three sides of the outer frame. Face Ply Main Ply (inner) Interlayer Conductive Coating Windows The other set goes into the attachment holes where there is no outer frame. The bushing assembly is a metal bushing with a rubber insert. The side strap makes the splice between the windshield and the aircraft structure along the aft edge (this strap also attaches to the side window
Flight deck side windows
The side window assembly is a bonded structure which includes an outer frame, outer and inner main plies, an interlayer, an edge attachment set, an inboard retainer, bushing assemblies, and a side strap.
Why are winglets fitted
The winglets are installed at each wingtip. They are used to decrease wingtip vortices.
What type of spoilers are fitted
There are ground spoilers and multifunction spoilers on the upper trailing edge of the wings. The multifunction spoilers are used to remove lift when the aircraft is in flight. The ground spoilers are used to remove lift when the aircraft is on the ground.
How many flaps on each wing
Each wing has three fowler type flaps. The flaps are installed on the wing trailing edge and travel on four tracks.
How is the wing Center box made
The center wing box structure is made of a primary frame with skin panels on the top and bottom. The center wing box structure is sealed between the front and rear bulkheads and the root rib at BL47.610. This compartment is sealed for the integral fuel tank of the center wing box. The front bulkhead is a one-piece assembly. The rear bulkhead is made from aluminum alloy and made stronger with stiffeners and caps. The rear bulkhead is a support for the attachment fittings for the main landing gear (MLG) side brace. The keel beam assembly transmits the forward and aft wing loads to the fuselage structure. This assembly is installed at the centerline of the center wing box. The top and bottom skin panels are made from aluminum alloy plate. These skin panels have two access panels for the servicing of the fuel and hydraulic systems. These access panels are made from laminated graphite. The MLG side stay attachment fittings are made from aluminum alloy. They are installed on the rear bulkhead of the center wing box.
Where are root wing ribs sealed
Ribs are installed between the front and rear spars. These ribs are made from aluminum alloy. The root rib and the ribs at WS178.00 and WS287.00 in each outer wing are sealed to divide the fuel tanks into three compartments.
How many passenger windows
Each side of the fuselage has 13 passenger compartment windows. One of the 13 windows on the right side of the fuselage is in the overwing emergency door. Because the other windows have equal dimensions and the same shape they are interchangeable.
What material is the rudder made of
The rudder is installed on the rear of the vertical stabilizer at four hinge points. The rudder is made of composite material. The structure of the rudder includes a spar assembly, rib assemblies (installed aft of the spar assembly), nose ribs (installed forward of the spar assembly), and skins with doublers. Drain openings are installed.
Where is elevator pcu installed
Two attachment fittings for the power control unit (PCU) are installed in the inboard end of each elevator between hinge 1 and hinge 2. An attachment bracket for the elevator position transmitter is installed on the front spar of each elevator inboard of hinge 1.
What material are the elevator skin panels made from
The skin panels are made of laminations of graphite.
What fs is vertical stab
The vertical stabilizer holds the horizontal stabilizer and the rudder. The vertical stabilizer is installed on the empennage/tail, which connects with the aft fuselage at FS861.00.
What is primary structure on horizontal stab
The primary structure of the horizontal stabilizer is a torque box which has a center box structure and left and right stabilizer structures. This box is attached to the vertical stabilizer at its rear end by a hinge and at its forward end by an electric screw jack, which rotates the horizontal stabilizer to provide pitch trim.
What structure is pylon made of
The primary structure includes the nose, the middle, the rear structure, and the engine mount support spars. The nose and middle structures are made from aluminum alloy. All the connections from the aircraft to the engine pass through the firewall. The rear structure is made of a set of Kevlar ribs held together with rivets.
How is fuselage constructed
The forward fuselage is designed and manufactured by Shorts Brothers of Belfast, Northern Ireland. It is transported to Bombardier in Montreal for mating with the cockpit section before being transported to deHavilland in Toronto for final assembly. The forward fuselage is manufactured in two sections, the transition barrel from station FS281.00 to FS381.00, and the constant barrel from station FS381.00 to FS557.00. The skins, stringers, and frames of the fuselage are manufactured from aluminum.
Is the fuselage semi monocoque
The fuselage is a semimonocoque assembly. It has five sections connected together with butt straps, doublers and stringer splices. The fuselage skin is made of chemically milled aluminum alloy with aluminum alloy frames and stringers.
Where is the overwing exit
There is one overwing emergency exit. The overwing emergency exit is found on the right side of the passenger compartment over the wing. The overwing emergency exit gives the passengers and the crew one more exit during an emergency.
Where is the cargo door
Access to the cargo area is by the baggage compartment door. The baggage compartment door is found on the left side of the rear fuselage forward of the rear pressure bulkhead.
How many doors
The following components make up the doors and exits of the aircraft:
Passenger door
Overwing emergency exit • Baggage door •
Aft equipment bay door • Service doors and access panels
Does the pax door have a switch
Passenger Door Internal Switch Figure A2 The internal switch (identified DOOR) is installed at the passenger door opening in the passenger compartment. The switch is used to close the passenger door with electrical power.
Does door have external switch
Passenger Door External Switch Figure A2 The external switch is installed in the fuselage, aft of the passenger door, behind an access panel. The switch is used to close the passenger door with electrical power, when DC or AC is available.
Where is the door actuator fitted and powered
Passenger Door Actuator Figures A2 and A3 The actuator is installed adjacent to the middle shaft in the airstairs. The actuator turns the middle shaft with a single row chain and sprockets, to close the passenger door. The passenger door actuator is operated by a switch in the passenger compartment or an external switch, aft of the passenger door. The actuator uses a brushless DC motor which is connected to a planetary gearbox and slip clutch and to the output shaft. The motor is energized during the door close sequence, which takes 18 seconds maximum.
How is the door motor controlled
The proximity switch (internal of the actuator circuit card) energizes a slowdown circuit. This decreases shaft rotation to approximately 1 RPM (6°/seconds) before the door reaches the close position. When the door is opened and the motor is not energized, an eddy current damper controls the speed. The door opening time is 7.0/8.5 seconds (10 seconds maximum). Before full open, the proximity switch energizes the slowdown circuit, which decreases speed to 12.5°/second maximum. The slip clutch prevents the output shaft from being overdriven. A thermal switch is attached to the motor to remove voltage if the motor becomes too hot.
Does the door have a tensator assy
The Tensator assembly comprises a single torque drum mounted to the airstairs middle shaft and four Tensator springs each housed in a Tensator drum. The springs are made of steel and measure over 15 ft (4.57 m) in length when fully extended. As the door is lowered, the airstairs middle shaft, under action of the two fuselage mounted cables, rotates. It causes the torque drum to draw each of the four Tensator springs out of their respective drums and around the larger drum. The uncoiling of the Tensator springs creates both a resistance of the falling door and a reserve of potential energy to assist in door closing.
Does the pax door have a vent flap
On door closure, pressurization of the aircraft is prevented by the installation of a vent flap in the door structure unless the door is correctly closed and locked. The flap is held open by four tension springs and is driven shut by a cam face on the aft G-latch via a series of levers during the final locking sequence. The design is such that only two springs are required to retain the vent flap in the open position. In the event of residual cabin pressure or icing conditions, during door deployment, the vent flap is pulled open by a direct link to the torque tube prior to full door lift, via a cable assembly.
Does the pax door have prox sensors
There are three proximity sensors installed in the passenger door. Two are located inside the airstairs and sense G lock position. The third senses the outer handle position. The proximity sensors provide indication to the crew via EICAS displaying a caution Passenger Door (amber) when the door is not properly locked. The sensors confirm that the G-latches have fully engaged on the airstairs pin when the door is fully locked and the external handle is closed. This electrical indication system defaults to failsafe (i.e. caution Passenger Door) when a sensor or interface electronics fails. The proximity sensors are monitored by the (landing gear electronic control unit) LGECU. There is also a mechanical indication pointer to indicate that the door is locked.
How is door closed manually
A rope wound around a pulley on the aft end of the middle shaft must be unwound sufficiently to be brought up into the cabin. The rope can be pulled, rotating the middle shaft and raising the door via the normal cables. The rope pulley is much larger than the cable pulleys, thereby reducing the pulling force necessary. Once the door is raised, it may be lowered into the frame and locked by the normal method with the lock handle.
Does the door latch need resetting
If the door handle is unlocked, and the operator wishes to lock it again without fully opening the door, the torque tube latch release mechanism must be reset. It can be reset by moving the door partly out and then pulling it back in and then moving the handle to the locked position.
Does the emergency exit door have sensor
A single proximity sensor installed at the top center of the overwing emergency exit door opening. This sensor is monitored by the LGECU (Landing Gear Electronic Control Unit) to give an EICAS caution message, R EMER EXIT, once the door is open.
Can emergency exit be locked out
Overwing Exit Lockpin For added security, a GSE (Ground Support Equipment) lockpin can be installed from the inside to prevent unwanted entry from the outside. This pin must be removed before flight.
Does cargo door have a latching mechanism
Baggage Door Latch Mechanism The baggage door latch mechanism holds the baggage door in the closed position. Two bolt assemblies extend from the forward and aft edges of the door structure into fittings on the adjacent fuselage frames. Pushrods connect the shoot bolt assemblies to the handles. A pushrod opens and closes the vent door assembly as the handle operates.
Does cargo door have balance springs
There are two balance springs, which attach to the fuselage structure above the baggage door. Each balance spring has a spring wound to help lift the baggage door. A cable from each balance spring is attached to the door at a lower roller assembly. The cables wind on pulleys when the door opens and lifts.
Does cargo door have prox sensors
Baggage Door Proximity Sensors There are two proximity sensors. They monitor door closed and locked condition, and provide through the LGECU a visual caution on EICAS (cargo door) to the flight crew, if the door is not fully closed and locked.
Does aft equipment bay door have prox sensor
The aft equipment bay door has a single proximity sensor on the door frame to provide warning when the door is open. A caution message LARGE SERV DOORS will be displayed on the EICAS page.
Does hyd service access panel have a prox switch
There is one proximity sensor at the hydraulic system no. 3 servicing access panel. A LARGE SERV DOORS CAS message is displayed when the door is open.
