DOC AIRBUS | AMM A320FCOCKPIT SEATS - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The cockpit is equipped with four seats :
The cockpit is equipped with four seats :
- a Captain seat
- a First Officer seat
- a Third Occupant seat located against the right aft panel.
- a folding seat for the Fourth Occupant located in the cockpit left aft section.
A. Captain and First Officer Seats
The Captain and First Officer seats are symmetrical and have the same function.
The Captain and First Officer seats are symmetrical and have the same function.
B. Occupant Seats
- Third Occupant Seat
The Third Occupant seat is a folding seat attached to the right rear panel in the cockpit. - Fourth Occupant Seat
The Fourth Occupant seat is of the folding type and has no adjustment.
2. Component Location
Cockpit Seats - Component Location| FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 3MS | SEAT-CAPTAIN | 211 | 25-11-51 | ||
| 4MS | SEAT-F/O | 212 | 25-11-51 | ||
| 13MM | SEAT-FOURTH OCCUPANT | 211 | 25-11-42 | ||
| 14MM | SEAT-THIRD OCCUPANT | 212 | 25-11-41 | ||
A. Captain and First Officer Seats
The Captain and First Officer seats are equidistant from the aircraft centerline:
Y +/- 530 mm (Y +/- 20.88 in.)
The base of the seats is attached to the floor by means of eight hexagonal head screws.
The Captain and First Officer seats are equidistant from the aircraft centerline:
Y +/- 530 mm (Y +/- 20.88 in.)
The base of the seats is attached to the floor by means of eight hexagonal head screws.
B. Occupant Seats
- Third Occupant Seat
- The Third Occupant seat stands apart from the aircraft centerline:
Y -86 mm (Y -3.39 in.) but can move to Y -35 mm (Y - 1.38 in.). - Fourth Occupant Seat
- The Fourth Occupant seat forms an angle of 22.8 degrees with respect to the cockpit aft partition.
The base of the seat is attached to the floor by means of four hexagonal head screws located inside the life vest compartment.
3. Component Description
A. Captain and First Officer Seats FIN: 3-MS FIN: 4-MS
(1) General
The Captain and First Officer seats are secured to the cockpit floor.
The seat moves longitudinally and vertically. In the rearmost position the seat moves sidewise towards the console, which increases the space between the pedestal and the seat and therefore enables passage of the seat occupant. This is the seat stowed position.
The Captain and First Officer seats are secured to the cockpit floor.
The seat moves longitudinally and vertically. In the rearmost position the seat moves sidewise towards the console, which increases the space between the pedestal and the seat and therefore enables passage of the seat occupant. This is the seat stowed position.
(3) Manual Controls
Manual controls are fitted to the seats. They serve to unlock the seat and allow to position it in different configurations.
Manual controls are fitted to the seats. They serve to unlock the seat and allow to position it in different configurations.
(4) Electrical Controls
Electrical controls are also available. They consist of a motor coupled to two reduction gears. The motor is controlled by two three-position switches. The gear motor assembly is overriden by the manual controls.
Electrical controls are also available. They consist of a motor coupled to two reduction gears. The motor is controlled by two three-position switches. The gear motor assembly is overriden by the manual controls.
(5) Additional Manual Controls
Additional manual controls are used to adjust the backrest and lumbar rest positions. All the controls are of easy access and enable the occupant to select the desired position.
Additional manual controls are used to adjust the backrest and lumbar rest positions. All the controls are of easy access and enable the occupant to select the desired position.
(6) Seat equipment
The backrest incorporates a life vest fitted in a housing closed by means of two magnets.
A lumbar rest adjustable in the vertical and horizontal directions enables adaptation of the seat to the occupant. It is possible to adjust the pedestal side armrest by means of a knurled knob located in the front.
The armrest is hinged to the backrest. It is therefore possible to lift it vertically and stow it behind the backrest.
The sidestick armrest located on the outboard side of the seat is provided with two adjustment knobs. These knobs are used to adjust the height and the tilt angle of the side stick armrest so that the pilot can rest his arm in its optimum position with respect to the side stick controller. Two position indicators show the selected position. The armrest is fixed to the seat pan structure and is not affected by backrest movements. It can be folded back to a vertical position to enable easy access to the crew briefcase or console.
The backrest incorporates a life vest fitted in a housing closed by means of two magnets.
A lumbar rest adjustable in the vertical and horizontal directions enables adaptation of the seat to the occupant. It is possible to adjust the pedestal side armrest by means of a knurled knob located in the front.
The armrest is hinged to the backrest. It is therefore possible to lift it vertically and stow it behind the backrest.
The sidestick armrest located on the outboard side of the seat is provided with two adjustment knobs. These knobs are used to adjust the height and the tilt angle of the side stick armrest so that the pilot can rest his arm in its optimum position with respect to the side stick controller. Two position indicators show the selected position. The armrest is fixed to the seat pan structure and is not affected by backrest movements. It can be folded back to a vertical position to enable easy access to the crew briefcase or console.
(7) Safety Harness
The safety harness comprises five straps and an inertia reel. The inertia reel can be locked by a control lever located behind the seat on the right side.
The safety harness comprises five straps and an inertia reel. The inertia reel can be locked by a control lever located behind the seat on the right side.
(8) Indicating
Four lamps which serve to light the floor are located under the Captain and First Officer seats (one under each corner of the seat pan). This lighting is controlled from the instrument panel.
Four lamps which serve to light the floor are located under the Captain and First Officer seats (one under each corner of the seat pan). This lighting is controlled from the instrument panel.
NOTE: The Captain and First Officer seats are symmetrical and their operation is identical.
B. Third Occupant Seat FIN: 14-MM
(1) General
The 3rd Occupant seat is a folding seat attached to the right rear panel in the cockpit.
It can slide along the Y-axis to take up a position on the aircraft centerline. No longitudinal adjustment is provided.
The seat pan unfolds and locks only in the unfolded position, in the aircraft centerline.
The 3rd Occupant seat is a folding seat attached to the right rear panel in the cockpit.
It can slide along the Y-axis to take up a position on the aircraft centerline. No longitudinal adjustment is provided.
The seat pan unfolds and locks only in the unfolded position, in the aircraft centerline.
(3) Controls
A manual control enables the seat to be moved from its stowage position to its utilization position on the aircraft centerline.
A second control serves to unlock the headrest.
A third control serves to lock the inertia reel.
A manual control enables the seat to be moved from its stowage position to its utilization position on the aircraft centerline.
A second control serves to unlock the headrest.
A third control serves to lock the inertia reel.
(4) Seat equipment
The headrest can be folded down so that the circuit breaker panel can be opened while the seat is in its stowed position.
A compartment closed by VELCRO tapes and containing a life vest is provided in the lower part of the seat.
The safety harness includes five straps and an inertia reel controlled by a handle located on the left of the seat. This handle serves to lock and unlock the inertia reel.
The headrest can be folded down so that the circuit breaker panel can be opened while the seat is in its stowed position.
A compartment closed by VELCRO tapes and containing a life vest is provided in the lower part of the seat.
The safety harness includes five straps and an inertia reel controlled by a handle located on the left of the seat. This handle serves to lock and unlock the inertia reel.
(5) Seat equipment.
The non-adjustable armrests pivot on the seat uprights.
The headrest can be folded down so that the circuit breaker panel can be opened while the seat is in its stowed position.
A compartment closed by VELCRO tapes and containing a life vest is provided in the lower part of the seat.
The safety harness includes five straps and an inertia reel controlled by a handle located on the left of the seat. This handle serves to lock and unlock the inertia reel.
The non-adjustable armrests pivot on the seat uprights.
The headrest can be folded down so that the circuit breaker panel can be opened while the seat is in its stowed position.
A compartment closed by VELCRO tapes and containing a life vest is provided in the lower part of the seat.
The safety harness includes five straps and an inertia reel controlled by a handle located on the left of the seat. This handle serves to lock and unlock the inertia reel.
C. Fourth Occupant Seat FIN: 13-MM
(1) General
The Fourth Occupant seat is a folding seat located against the left rear partition in the cockpit. The seat cushion is folded down into place. It is returned to its stowed position by pressing upwards and against the partition.
The lower section of the seat is provided with a compartment containing a life vest and closed by VELCRO tapes.
The straps of the safety harness can be clicked into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or anticlockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
The inertial reel locking control is located in the coat storage compartment.
The Fourth Occupant seat is a folding seat located against the left rear partition in the cockpit. The seat cushion is folded down into place. It is returned to its stowed position by pressing upwards and against the partition.
The lower section of the seat is provided with a compartment containing a life vest and closed by VELCRO tapes.
The straps of the safety harness can be clicked into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or anticlockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
The inertial reel locking control is located in the coat storage compartment.
4. Operation/Control and Indicating
A. Captain and First Officer Seats
(1) Vertical travel
1 Up travel
To move the seat in the up direction pull the control handle, marked V and located on the inboard side of the seat pan, upwards in order to unlock the seat. Then, by taking your weight off the seat, adjust the seat to required position, then release the handle. A gas cylinder compensates for the weight of the seat (2 grasp handles are located above each pilot seat).
To move the seat in the up direction pull the control handle, marked V and located on the inboard side of the seat pan, upwards in order to unlock the seat. Then, by taking your weight off the seat, adjust the seat to required position, then release the handle. A gas cylinder compensates for the weight of the seat (2 grasp handles are located above each pilot seat).
2 Down travel
To move the seat in the down direction, pull the control handle upwards in order to unlock the seat. The weight of the occupant is sufficient to move the seat downwards. To lock the seat in position, release the handle. The down movement is slowed down by means of a gas cylinder.
To move the seat in the down direction, pull the control handle upwards in order to unlock the seat. The weight of the occupant is sufficient to move the seat downwards. To lock the seat in position, release the handle. The down movement is slowed down by means of a gas cylinder.
NOTE: The control handle V acts on a ball-nut/screw system ensuring vertical movement of the seat.
(b) Vertical electrical control
If the circuit is supplied with power, place the control switch located on the inner side of the seat pan in the up or down position until the seat reaches the required position. Seat movements are obtained by the gear motor associated with the ball-nut/screw system. The movements are limited by stops and an overtorque detector integrated in the gear motor assembly.
If the circuit is supplied with power, place the control switch located on the inner side of the seat pan in the up or down position until the seat reaches the required position. Seat movements are obtained by the gear motor associated with the ball-nut/screw system. The movements are limited by stops and an overtorque detector integrated in the gear motor assembly.
(2) Horizontal travel
(a) Manual control
To move the seat forwards or backwards, pull the control handle marked H, located on the pedestal side of the seat, upwards to unlock the system. When the desired position is reached, release the handle to lock the system,
The seat is held in required position by means of a locking pin which slides into a drilled fitting attached to the seat pan.
To move the seat forwards or backwards, pull the control handle marked H, located on the pedestal side of the seat, upwards to unlock the system. When the desired position is reached, release the handle to lock the system,
The seat is held in required position by means of a locking pin which slides into a drilled fitting attached to the seat pan.
(3) Electrical control
The three-position switch controls the gear motor connected to a rack and pinion system located under the seat pan. When the seat reaches its limit position, overtorque is detected and the motor power supply is cut off. The detector is integrated in the gear motor. The gear motor assembly locks the seat on the rack.
The three-position switch controls the gear motor connected to a rack and pinion system located under the seat pan. When the seat reaches its limit position, overtorque is detected and the motor power supply is cut off. The detector is integrated in the gear motor. The gear motor assembly locks the seat on the rack.
(4) Backrest adjustment
The position of the backrest can be adjusted from 7 deg. to 34 deg. with respect to the vertical by pulling the control handle marked R, located on the pedestal side of the seat. The lever acts on two locks by means of a control and 2 cables. A gas cylinder damps the backwards movement of the backrest and acts as return spring when the backrest is raised to the 7 deg. position.
The position of the backrest can be adjusted from 7 deg. to 34 deg. with respect to the vertical by pulling the control handle marked R, located on the pedestal side of the seat. The lever acts on two locks by means of a control and 2 cables. A gas cylinder damps the backwards movement of the backrest and acts as return spring when the backrest is raised to the 7 deg. position.
(5) Lumbar rest adjustment
Two coaxial knobs, located on the pedestal side of the backrest enable the lumbar rest adjustment in the vertical and horizontal directions.
The round serrated control knob ensures the vertical lumbar rest adjustment by means of a rack and pinion system.
The triangular knob ensures the depth adjustment of the lumbar rest by means of a cam-mounted rack and pinion assembly.
Two coaxial knobs, located on the pedestal side of the backrest enable the lumbar rest adjustment in the vertical and horizontal directions.
The round serrated control knob ensures the vertical lumbar rest adjustment by means of a rack and pinion system.
The triangular knob ensures the depth adjustment of the lumbar rest by means of a cam-mounted rack and pinion assembly.
(a) Inboard armrest
The inboard armrest (pedestal side) can be raised vertically and stowed behind the backrest.
A knob located on the front of the armrest ensures height adjustment by means of a screw-nut system and associated stop (continuous adjustment from 15 deg. downwards to 10 deg. upwards).
The inboard armrest (pedestal side) can be raised vertically and stowed behind the backrest.
A knob located on the front of the armrest ensures height adjustment by means of a screw-nut system and associated stop (continuous adjustment from 15 deg. downwards to 10 deg. upwards).
(b) Side stick armrest
The side stick armrest is composed of three main sections. These are the fixed arm, the carrier arm and the side stick table.
The fixed arm supports the carrier arm and side stick table assembly and is attached to the seat pan.
The carrier arm, by a rotation of 18 deg. max. upwards, with respect to the horizontal, around a hinge pin, located on the fixed arm, enables height adjustment of the side stick table. The movement is given by a knob located on the outboard side of the armrest. This knob transfers the rotary movement to a screw-nut system. The nut is connected to a link and 2 rollers which transform the translation movement of the nut into a rotary movement of the carrier arm around the fixed arm. The tilt angle of the armrest table can be adjusted. A knob located on the front of the armrest enables this adjustment. The principle of the adjustment mechanism is the same as the one described above except that the rotation hinge pin is located on the carrier arm. Adjustment is up to 30 deg. downwards with respect to the horizontal. A position indicator including two scales is integrated in the table. The scale on the seat side shows the tilt angle adjustment of the table.
The scale on the outboard side shows the table height.
A wheel, located on the front of the table, serves to avoid interference between the armrest and the lateral console when the seat is moved forwards with the table fully inclined.
The side stick armrest is composed of three main sections. These are the fixed arm, the carrier arm and the side stick table.
The fixed arm supports the carrier arm and side stick table assembly and is attached to the seat pan.
The carrier arm, by a rotation of 18 deg. max. upwards, with respect to the horizontal, around a hinge pin, located on the fixed arm, enables height adjustment of the side stick table. The movement is given by a knob located on the outboard side of the armrest. This knob transfers the rotary movement to a screw-nut system. The nut is connected to a link and 2 rollers which transform the translation movement of the nut into a rotary movement of the carrier arm around the fixed arm. The tilt angle of the armrest table can be adjusted. A knob located on the front of the armrest enables this adjustment. The principle of the adjustment mechanism is the same as the one described above except that the rotation hinge pin is located on the carrier arm. Adjustment is up to 30 deg. downwards with respect to the horizontal. A position indicator including two scales is integrated in the table. The scale on the seat side shows the tilt angle adjustment of the table.
The scale on the outboard side shows the table height.
A wheel, located on the front of the table, serves to avoid interference between the armrest and the lateral console when the seat is moved forwards with the table fully inclined.
(7) Safety harness
The straps can be clicked into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or counterclockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
A control lever, located on the pedestal side of the seat backrest, serves to lock the inertia reel. To lock the mechanism the lever must be in the down position. To unlock the mechanism the lever must be in the up position.
The straps can be clicked into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or counterclockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
A control lever, located on the pedestal side of the seat backrest, serves to lock the inertia reel. To lock the mechanism the lever must be in the down position. To unlock the mechanism the lever must be in the up position.
B. Third Occupant Seat
(1) Deployment from stowage position to utilization position on aircraft centerline.
To move the seat to its utilization position on the aircraft centerline, the handle called SEAT UNLOCK, located on the left of the seat, must be pulled upwards in order to unlock the system and enable the seat to slide sidewise into its utilization position. When utilization position is reached, the system locks.
The translation movement is given by two guide tubes attached to the rear upper and lower sections of the seat. The tubes are guided by ball-sleeves attached to the rear panel. The seat is held in position by a locking pin which engages in the upper guide tube (Part 1).
The seat bottom folds down and locks automatically in the low position. The opening of the seat bottom can be done only when the seat is in utilization position on the aircraft centerline.
Locking is achieved by a hook attached to the right upright of the seat which locks one of the rollers guiding the seat bottom movement.
The headrest is folded up into its extended position where it automatically locks in place. It is held in position by two locking pins which engage in lateral holes.
To move the seat to its utilization position on the aircraft centerline, the handle called SEAT UNLOCK, located on the left of the seat, must be pulled upwards in order to unlock the system and enable the seat to slide sidewise into its utilization position. When utilization position is reached, the system locks.
The translation movement is given by two guide tubes attached to the rear upper and lower sections of the seat. The tubes are guided by ball-sleeves attached to the rear panel. The seat is held in position by a locking pin which engages in the upper guide tube (Part 1).
The seat bottom folds down and locks automatically in the low position. The opening of the seat bottom can be done only when the seat is in utilization position on the aircraft centerline.
Locking is achieved by a hook attached to the right upright of the seat which locks one of the rollers guiding the seat bottom movement.
The headrest is folded up into its extended position where it automatically locks in place. It is held in position by two locking pins which engage in lateral holes.
(2) Deployment from stowage position to utilization position on aircraft centerline.
To move the seat to its utilization position on the aircraft centerline, the handle called SEAT UNLOCK, located on the left of the seat, must be pulled upwards in order to unlock the system and enable the seat to slide sidewise into its utilization position. When the utilization position is reached, the system locks.
The translation movement is given by two guide tubes attached to the rear upper and lower sections of the seat. The tubes are guided by ball-sleeves attached to the rear panel. The seat is held in position by a locking pin which engages in the upper guide tube (Part 1).
The seat bottom folds down and locks automatically in the low position. The opening of the seat bottom can be done only when the seat is in utilization position on the aircraft centerline.
Locking is achieved by a hook attached to the right upright of the seat which locks one of the rollers guiding the seat bottom movement.
The armrests are folded down manually.
The headrest is folded up into its extended position where it automatically locks in place. It is held in position by two locking pins which engage in lateral holes.
To move the seat to its utilization position on the aircraft centerline, the handle called SEAT UNLOCK, located on the left of the seat, must be pulled upwards in order to unlock the system and enable the seat to slide sidewise into its utilization position. When the utilization position is reached, the system locks.
The translation movement is given by two guide tubes attached to the rear upper and lower sections of the seat. The tubes are guided by ball-sleeves attached to the rear panel. The seat is held in position by a locking pin which engages in the upper guide tube (Part 1).
The seat bottom folds down and locks automatically in the low position. The opening of the seat bottom can be done only when the seat is in utilization position on the aircraft centerline.
Locking is achieved by a hook attached to the right upright of the seat which locks one of the rollers guiding the seat bottom movement.
The armrests are folded down manually.
The headrest is folded up into its extended position where it automatically locks in place. It is held in position by two locking pins which engage in lateral holes.
(3) Return to stowed position
To fold down the headrest, simultaneously operate the two controls located in the center of bottom section of the headrest. When the system unlocks, fold down the headrest into its stowed position.
To return the assembly to its stowed position:
To fold down the headrest, simultaneously operate the two controls located in the center of bottom section of the headrest. When the system unlocks, fold down the headrest into its stowed position.
To return the assembly to its stowed position:
- move the control handle marked SEAT UNLOCK upwards and move the seat to stowed position. As soon as the seat detects this movement and if the seat is not occupied, the seat bottom will then rise automatically. This prevents any interference with the First Officer seat when it is moved backwards.
or - pull up the seat bottom to override the locking force then the seat bottom will rise automatically. Move the control handle marked SEAT UNLOCK upwards and move the seat to the stowed position.
(4) Return to stowed position
To fold down the headrest, simultaneously act the two controls located in the center of the bottom section of the headrest. When the system unlocks, fold down the headrest into its stowed position.
To return the assembly to its stowed position:
To fold down the headrest, simultaneously act the two controls located in the center of the bottom section of the headrest. When the system unlocks, fold down the headrest into its stowed position.
To return the assembly to its stowed position:
- move the control handle marked SEAT UNLOCK upwards and move the seat to the stowed position. As soon as the seat detects this movement and if the seat is not occupied, the seat bottom and the two armrests will then rise automatically. This prevents any interference with the First Officer seat when it is moved backwards.
or - pull up the seat bottom to override the locking force then the seat bottom and the two armrests will rise automatically. Move the control handle marked SEAT UNLOCK upwards and move the seat to the stowed position.
(5) Safety harness
The straps can be clipped into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or anticlockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
A control lever, located behind the seat on the left side, serves to lock the inertia reel. To lock the mechanism, the lever must be the in up position.
The straps can be clipped into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or anticlockwise, releases the two shoulder straps and the lap belt.
Pressing the control located on the top of the buckle releases the shoulder straps alone.
A control lever, located behind the seat on the left side, serves to lock the inertia reel. To lock the mechanism, the lever must be the in up position.
C. Fourth Occupant Seat
The Fourth Occupant Seat is of the folding type. It is attached to the floor and has no adjustment device.
The Fourth Occupant Seat is of the folding type. It is attached to the floor and has no adjustment device.