DOC AIRBUS | AMM A320FSERVICE DOORS - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The service doors give access to the systems and equipment for servicing.
** ON A/C NOT FOR ALL The service doors give access to the systems and equipment for servicing.
2. Component Location
** ON A/C NOT FOR ALL | ------------------------------------------------------------------------------- |
| FIN I FUNCTIONAL DESIGNATION I PANELIZONEIACCESS I ATA |
| I I I I DOOR I REF. |
| ------------------------------------------------------------------------------- |
| EXTERNAL POWER RECEPTACLE DOOR 121 121AL 52-42-12 |
| FWD CARGO COMPARTMENT DOOR 134 134AR 52-42-15 |
| CONTROL PANEL DOOR |
| AFT CARGO COMPARTMENT DOOR 154 154AR 52-42-15 |
| CONTROL PANEL DOOR |
| POTABLE WATER SERVICE DOOR 171 171AL |
| LAVATORY SERVICE DOOR 172 172AR |
| GROUND AIR CONDITIONING/ |
| AIR STARTING DOOR 191 191DB 52-42-16 |
| GROUND SERVICE CONDITION AIR 191 191CB 52-42-17 |
| CONNECTION DOOR |
| REFUEL/DEFUEL CONTROL PANEL DOOR 192 192MB 52-42-18 |
| BLUE HYDRAULIC SYSTEM - ACCESS DOOR 195 195BB 52-42-26 |
| YELLOW HYDRAULIC SYSTEM - ACCESS DOOR 196 196BB 52-42-26 |
| HYDRAULIC SYSTEM - SERVICE DOOR 198 198DB 52-42-27 |
| GREEN HYDRAULIC SYSTEM 197 197CB |
| GROUND SERVICE PANEL DOOR |
| BLUE HYDRAULIC SYSTEM GROUND 197 197EB |
| SERVICE PANEL DOOR |
| YELLOW HYDRAULIC SYSTEM 198 198CB |
| GROUND SERVICE PANEL DOOR |
| FWD CARGO COMPARTMENT ACCESS DOOR 825 825AR |
| AFT CARGO COMPARTMENT ACCESS DOOR 826 826AR |
| ------------------------------------------------------------------------------- |
| FIN I FUNCTIONAL DESIGNATION I PANELIZONEIACCESS I ATA |
| I I I I DOOR I REF. |
| ------------------------------------------------------------------------------- |
| EXTERNAL POWER RECEPTACLE DOOR 121 121AL 52-42-12 |
| FWD CARGO COMPARTMENT DOOR 134 134AR 52-42-15 |
| CONTROL PANEL DOOR |
| AFT CARGO COMPARTMENT DOOR 154 154AR 52-42-15 |
| CONTROL PANEL DOOR |
| POTABLE WATER SERVICE DOOR 171 171AL |
| LAVATORY SERVICE DOOR 172 172AR |
| GROUND AIR CONDITIONING/ |
| AIR STARTING DOOR 191 191DB 52-42-16 |
| GROUND SERVICE CONDITION AIR 191 191CB 52-42-17 |
| CONNECTION DOOR |
| REFUEL/DEFUEL CONTROL PANEL DOOR 622 622KB 52-42-18 |
| BLUE HYDRAULIC SYSTEM - ACCESS DOOR 195 195BB 52-42-26 |
| YELLOW HYDRAULIC SYSTEM - ACCESS DOOR 196 196BB 52-42-26 |
| HYDRAULIC SYSTEM - SERVICE DOOR 198 198DB 52-42-27 |
| GREEN HYDRAULIC SYSTEM 197 197CB |
| GROUND SERVICE PANEL DOOR |
| BLUE HYDRAULIC SYSTEM GROUND 197 197EB |
| SERVICE PANEL DOOR |
| YELLOW HYDRAULIC SYSTEM 198 198CB |
| GROUND SERVICE PANEL DOOR |
| FWD CARGO COMPARTMENT ACCESS DOOR 825 825AR |
| AFT CARGO COMPARTMENT ACCESS DOOR 826 826AR |
3. Component Description
A. External Power Receptacle Door
The external power receptacle door 121AL is installed in the lower fuselage between FR7 and FR8. The door is a quick-opening type door and opens outwards towards the front of the aircraft. The door gives access to the ground electrical connector and to the interphone service panel.
The external power receptacle door is made of light alloy and consists of a shaped plate. The door is made stronger on the inner side with a doubler plate. Attached to the door are the hinge assy, the latch assy and the two stop angles. The latch assy and the two stop angles are attached with rivets to the door. The hinge assy is attached with rivets to the door and with screws to the door panel hood.
The spring rod assy is installed between the hinge assy and the push rod fitting. The push rod fitting is attached to the door panel hood. The spring rod assy consists of a spring and a shaft with turns between the hinge assy and the push rod fitting. It forms an over-center device which keeps the door in the fully open position and helps to close the door.
The external power receptacle door 121AL is installed in the lower fuselage between FR7 and FR8. The door is a quick-opening type door and opens outwards towards the front of the aircraft. The door gives access to the ground electrical connector and to the interphone service panel.
The external power receptacle door is made of light alloy and consists of a shaped plate. The door is made stronger on the inner side with a doubler plate. Attached to the door are the hinge assy, the latch assy and the two stop angles. The latch assy and the two stop angles are attached with rivets to the door. The hinge assy is attached with rivets to the door and with screws to the door panel hood.
The spring rod assy is installed between the hinge assy and the push rod fitting. The push rod fitting is attached to the door panel hood. The spring rod assy consists of a spring and a shaft with turns between the hinge assy and the push rod fitting. It forms an over-center device which keeps the door in the fully open position and helps to close the door.
B. FWD and AFT Cargo Compartment Door Control Panel Door 134AR, 154AR
The FWD cargo compartment door control panel door 134AR is installed in the lower fuselage between FR29 and FR30. The AFT cargo compartment door control panel door 154AR is installed in the lower fuselage between FR56 and FR57. The doors are quick-opening type doors and open outward toward the front of the aircraft. The doors give access to the cargo compartment door control panels.
Each control panel door is made of light alloy and consists of a shaped plate to accommodate the hinges and the latch mechanism. The latch mechanism lock the control panel doors in the closed position. Each locking pin of the latch mechanisms engages with a retaining catch, which is installed in the fuselage. The doors are then flush with the fuselage contour.
Two hinges attach the control panel doors to the fuselage. A spring rod assembly is attached to a hinge on each control panel door and to fittings at the fuselage. The spring rod assembly consists of a spring and a shaft which pivots between the hinge and the fitting. It forms an overcenter device which retains the panel door in the fully open position and helps to close the door.
The FWD cargo compartment door control panel door 134AR is installed in the lower fuselage between FR29 and FR30. The AFT cargo compartment door control panel door 154AR is installed in the lower fuselage between FR56 and FR57. The doors are quick-opening type doors and open outward toward the front of the aircraft. The doors give access to the cargo compartment door control panels.
Each control panel door is made of light alloy and consists of a shaped plate to accommodate the hinges and the latch mechanism. The latch mechanism lock the control panel doors in the closed position. Each locking pin of the latch mechanisms engages with a retaining catch, which is installed in the fuselage. The doors are then flush with the fuselage contour.
Two hinges attach the control panel doors to the fuselage. A spring rod assembly is attached to a hinge on each control panel door and to fittings at the fuselage. The spring rod assembly consists of a spring and a shaft which pivots between the hinge and the fitting. It forms an overcenter device which retains the panel door in the fully open position and helps to close the door.
C. Potable Water Service Door 171AL
The potable water service door 171AL is installed in the lower fuselage between FR65 and FR66. The potable water service door is adapted to the fuselage contour and gives access to the potable water service panel. The door is a quick-opening type door and opens outward to the front of the aircraft.
The potable water service door is made of honeycomb core which is bonded between prepreg sheets. A light alloy sheet is bonded to the outer side of the potable water service door. The potable water service door is attached to the fuselage with two support hinges. They are riveted to the door and screwed to the fuselage.
Screwed between the support hinges and the fuselage are the flat springs, which hold the door in the open position. A hood is integrated at the inner side of the door. The hood is equipped with a rubber seal. When the door is closed, the rubber seal blanks off a drain pipe.
Two adjustable latch assemblies lock the potable water service door in the closed position. When the latch assemblies are correctly adjusted, the door is flush with the fuselage contour. The door is sealed by a rubber strip bonded around the inner periphery of the door.
The potable water service door 171AL is installed in the lower fuselage between FR65 and FR66. The potable water service door is adapted to the fuselage contour and gives access to the potable water service panel. The door is a quick-opening type door and opens outward to the front of the aircraft.
The potable water service door is made of honeycomb core which is bonded between prepreg sheets. A light alloy sheet is bonded to the outer side of the potable water service door. The potable water service door is attached to the fuselage with two support hinges. They are riveted to the door and screwed to the fuselage.
Screwed between the support hinges and the fuselage are the flat springs, which hold the door in the open position. A hood is integrated at the inner side of the door. The hood is equipped with a rubber seal. When the door is closed, the rubber seal blanks off a drain pipe.
Two adjustable latch assemblies lock the potable water service door in the closed position. When the latch assemblies are correctly adjusted, the door is flush with the fuselage contour. The door is sealed by a rubber strip bonded around the inner periphery of the door.
D. Lavatory Service Door 172AR
The lavatory service door 172AR is installed in the lower fuselage between FR65 and FR66. The lavatory service door is adapted to the fuselage contour and gives access to the lavatory service panel. The door is a quick-opening type door and opens outward to the front of the aircraft.
The lavatory service door is made of honeycomb core which is bonded between prepreg sheets. A light alloy sheet is bonded to the outer side of the door. The lavatory service door is attached to the fuselage with two support hinges. They are riveted to the door and screwed to the fuselage. Screwed between the support hinges and the fuselage are the flat springs, which hold the door in the open position.
Two adjustable latch assemblies lock the lavatory service door in the closed position. When the latch assemblies are correctly adjusted, the door is flush with the fuselage contour. The door is sealed by a rubber strip bonded around the inner periphery of the door.
The lavatory service door 172AR is installed in the lower fuselage between FR65 and FR66. The lavatory service door is adapted to the fuselage contour and gives access to the lavatory service panel. The door is a quick-opening type door and opens outward to the front of the aircraft.
The lavatory service door is made of honeycomb core which is bonded between prepreg sheets. A light alloy sheet is bonded to the outer side of the door. The lavatory service door is attached to the fuselage with two support hinges. They are riveted to the door and screwed to the fuselage. Screwed between the support hinges and the fuselage are the flat springs, which hold the door in the open position.
Two adjustable latch assemblies lock the lavatory service door in the closed position. When the latch assemblies are correctly adjusted, the door is flush with the fuselage contour. The door is sealed by a rubber strip bonded around the inner periphery of the door.
E. Ground Air Conditioning/Air Starting Door
The ground air conditioning/air starting door is located in the belly fairing between FR35 and FR36. The door is a quick-opening-type door and opens outward toward the front of the aircraft.
The door gives access to the high-pressure ground connector for the ground air conditioning/air starting system.
The ground air conditioning/air starting door is located in the belly fairing between FR35 and FR36. The door is a quick-opening-type door and opens outward toward the front of the aircraft.
The door gives access to the high-pressure ground connector for the ground air conditioning/air starting system.
(1) Description
The ground air conditioning/air starting door is made of honeycomb core. The honeycomb core is bonded between several layers of foil.
The door is attached with the door hinge to the belly fairing. The door hinge is riveted to the door and screwed to the belly fairing. Two latch assemblies are riveted to the door to lock the door. The locking pins of the latch assemblies engage with the hooks and the door is then flush with the belly fairing. The hooks are screwed to the catch brackets which are attached at the belly fairing.
A spring rod assy is installed between the push rod door fitting and the push rod fitting. The spring rod assy consists of a spring and a shaft which pivots between these fittings. It forms an overcenter device which retains the door in the fully open position and assists when the door closes.
The ground air conditioning/air starting door is made of honeycomb core. The honeycomb core is bonded between several layers of foil.
The door is attached with the door hinge to the belly fairing. The door hinge is riveted to the door and screwed to the belly fairing. Two latch assemblies are riveted to the door to lock the door. The locking pins of the latch assemblies engage with the hooks and the door is then flush with the belly fairing. The hooks are screwed to the catch brackets which are attached at the belly fairing.
A spring rod assy is installed between the push rod door fitting and the push rod fitting. The spring rod assy consists of a spring and a shaft which pivots between these fittings. It forms an overcenter device which retains the door in the fully open position and assists when the door closes.
F. FWD and AFT Cargo Compartment Access Doors 825AR, 826AR
The access doors 825AR and 826AR are on the FWD and AFT cargo compartment doors to give access to the door mechanisms.
The access doors are made of light alloy and attached with quick-release fasteners to the cargo compartment doors. A cutout for the door handle is integrated in each access door.
The access doors 825AR and 826AR are on the FWD and AFT cargo compartment doors to give access to the door mechanisms.
The access doors are made of light alloy and attached with quick-release fasteners to the cargo compartment doors. A cutout for the door handle is integrated in each access door.
G. Ground Service Conditioned Air Connection Door 191CB
The ground service conditioned air connection door 191CB is in the belly fairing between FR34 and FR35. The door is a quick-opening type door and opens outwards towards the front of the aircraft.
The door gives access to the low-pressure ground connection for conditioned air.
The door is made of honeycomb core which is bonded between several layers of foil.
The door is attached to the belly fairing with the hinge. The hinge is attached with screws to the door and the belly fairing.
The latch assy is attached with rivets to the door. When the door closes, the locking pin of the latch assy engages with a hook and the door is then flush with the belly fairing. The hook is attached with screws to a bracket which is attached to the belly fairing.
The rod assy is installed between the hinge fitting assy and an attach fitting. The hinge fitting assy is attached with screws to the door. The attach fitting is attached with screws to the belly fairing. The rod assy turns between the hinge fitting and the attach fitting. These components form an overcenter device which keeps the door in the fully open position and helps to close the door.
The ground service conditioned air connection door 191CB is in the belly fairing between FR34 and FR35. The door is a quick-opening type door and opens outwards towards the front of the aircraft.
The door gives access to the low-pressure ground connection for conditioned air.
The door is made of honeycomb core which is bonded between several layers of foil.
The door is attached to the belly fairing with the hinge. The hinge is attached with screws to the door and the belly fairing.
The latch assy is attached with rivets to the door. When the door closes, the locking pin of the latch assy engages with a hook and the door is then flush with the belly fairing. The hook is attached with screws to a bracket which is attached to the belly fairing.
The rod assy is installed between the hinge fitting assy and an attach fitting. The hinge fitting assy is attached with screws to the door. The attach fitting is attached with screws to the belly fairing. The rod assy turns between the hinge fitting and the attach fitting. These components form an overcenter device which keeps the door in the fully open position and helps to close the door.
H. Refuel/Defuel Control-Panel Door
(1) Refuel/Defuel Control-Panel Door 622KB
(2) Refuel/Defuel Control-Panel Door 192MB
The refuel/defuel control-panel door 622KB is installed on the leading edge of the RH wing.
The door is a quick-opening type door and opens outwards, downward of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is made of light alloy and has three pushbutton latches,two hinges and a door stay mechanism. The hinge attaches the door to the wing structure. The hinges are attached with screws to the door and to the wing structure. Three latch assemblies are attached with rivets to the door.
When the door closes, the locking pin of the latch assemblies engages behind a metal sheet which is riveted to the wing structure. When the door is closed it is flush with the wing contour.
The door stay mechanism keeps the door in the open position.
The refuel/defuel control-panel door 622KB is installed on the leading edge of the RH wing.
The door is a quick-opening type door and opens outwards, downward of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is made of light alloy and has three pushbutton latches,two hinges and a door stay mechanism. The hinge attaches the door to the wing structure. The hinges are attached with screws to the door and to the wing structure. Three latch assemblies are attached with rivets to the door.
When the door closes, the locking pin of the latch assemblies engages behind a metal sheet which is riveted to the wing structure. When the door is closed it is flush with the wing contour.
The door stay mechanism keeps the door in the open position.
(3) Refuel/Defuel Control-Panel Door 192MB
The refuel/defuel control-panel door 192MB is installed on the right side of the belly fairing between FR37 and FR39.
The door is a quick-opening type door and opens outwards and in flight direction of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is made of honeycomb core which is bonded between several layers of foil. There are two screwed hinge arms to connect the door with the belly fairing. The lower hinge arm has an adjustable stop which contacts with the related limit switch when the door closes.
Two latch assemblies are attached with rivets to the door. When the door is closed, the locking pin of the latch assemblies engage with the locking hooks of the belly fairing.
The locking device is installed between the door and the belly fairing to keep the door in the fully open position.
The refuel/defuel control-panel door 192MB is installed on the right side of the belly fairing between FR37 and FR39.
The door is a quick-opening type door and opens outwards and in flight direction of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is made of honeycomb core which is bonded between several layers of foil. There are two screwed hinge arms to connect the door with the belly fairing. The lower hinge arm has an adjustable stop which contacts with the related limit switch when the door closes.
Two latch assemblies are attached with rivets to the door. When the door is closed, the locking pin of the latch assemblies engage with the locking hooks of the belly fairing.
The locking device is installed between the door and the belly fairing to keep the door in the fully open position.
(4) Refuel/Defuel Control-Panel Door 192MB
The refuel/defuel control-panel door 192MB is installed on the right side of the belly fairing between FR37 and FR39.
The door is a quick-opening type that opens outwards and in the flight direction of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is a one piece machined aluminum structure with reinforcement plates. Two screwed hinge arms connect the door with the belly fairing. The lower hinge arm has an adjustable stop that touches the related limit switch when the door closes.
Two latch assemblies are attached with blind rivets to the door. When the door is closed, the latch assemblies engage with the foliated plate of the fitting assembly on the belly fairing.
The locking device is installed between the door and the belly fairing to keep the door in the fully open position.
The refuel/defuel control-panel door 192MB is installed on the right side of the belly fairing between FR37 and FR39.
The door is a quick-opening type that opens outwards and in the flight direction of the aircraft. The door gives access to the refuel/defuel control panel 800VU.
The door is a one piece machined aluminum structure with reinforcement plates. Two screwed hinge arms connect the door with the belly fairing. The lower hinge arm has an adjustable stop that touches the related limit switch when the door closes.
Two latch assemblies are attached with blind rivets to the door. When the door is closed, the latch assemblies engage with the foliated plate of the fitting assembly on the belly fairing.
The locking device is installed between the door and the belly fairing to keep the door in the fully open position.
I. Green, Blue and Yellow Hydraulic System Ground-Service Panel Doors 197CB, 197EB, 198CB (referred to as access door)
Green, Blue and Yellow Hydraulic System Ground-Service Panel Doors 197CB, 197EB, 198CB ** ON A/C NOT FOR ALL
Green, Blue and Yellow Hydraulic System Ground-Service Panel Doors 197CB, 197EB, 198CB ** ON A/C NOT FOR ALL
The access door 197CB is installed on the left side of the belly fairing between FR47 and FR48. It gives access to the ground service panel of the green hydraulic system.
The access door 198CB is installed on the right side of the belly fairing between FR47 and FR48. It gives access to the ground service panel of the yellow hydraulic system and to the hand pump of the cargo doors.
The access door 197EB is installed on the left side of the belly fairing between FR49 and FR50. It gives access to the ground service panel of the blue hydraulic system and to the RAT control panel.
The access doors are quick-opening type and open outboard in the front of the aircraft. They are made of honeycomb core which is bonded between several layers of glass cloth.
Each access door has two hinge assemblies mounted with screws to the the panel boxes of the belly fairing. The hinge assemblies have a mechanism which is spring-loaded when:
The green hydraulic system ground-service panel door 197CB is installed on the left side of the belly fairing between FR47/51 and FR52. The door gives access to the ground connection for the green hydraulic system.
The yellow hydraulic system ground-service panel door 198CB is installed on the right side of the belly fairing between FR47/51 and FR52. The door gives access to the ground connection for the yellow hydraulic system and to the cargo door hand pump.
The blue hydraulic system ground-service panel door 197EB is installed on the left side of the belly fairing between FR53 and FR54. The door gives access to the ground connection for the blue hydraulic system and to the RAT control panel.
The doors are quick-opening type doors and open outwards towards the front of the aircraft.
The doors are made of honeycomb core. The honeycomb core is bonded between several layers of glass cloth.
Each door is attached with two hinge assemblies to the belly fairing. The hinge assemblies are attached with screws to the doors and with pins to the support fitting assemblies. The support fitting assemblies are attached with screws to the panel box assemblies.
The spring bolt assemblies are installed and turn between the hinge assemblies and the bearing flange assemblies. They form an overcenter device which keeps the door in the fully open position and helps to close the doors.
The doors have latch assemblies to lock the doors in closed position. The latch assemblies are attached with rivets to the doors. The locking pin of each latch assy engage with the latch hooks; the doors are then aligned with the belly fairing. The latch hooks are attached with screws to the panel box assemblies of the belly fairing.
The access door 197CB is installed on the left side of the belly fairing between FR47/51 and FR52. It gives access to the ground service panel of the green hydraulic system.
The access door 198CB is installed on the right side of the belly fairing between FR47/51 and FR52. It gives access to the ground service panel of the yellow hydraulic system and to the hand pump of the cargo doors.
The access door 197EB is installed on the left side of the belly fairing between FR53 and FR54. It gives access to the ground service panel of the blue hydraulic system and to the RAT control panel.
The access doors are quick-opening type doors and open outboard in the front of the aircraft. They are made of honeycomb core which is bonded between several layers of glass cloth.
Each access door has two hinge assemblies mounted with screws to the panel boxes of the belly fairing. The hinge assemblies have a mechanism which is spring-loaded when:
Green, Blue and Yellow Hydraulic System Ground-Service Panel Doors 197CB, 197EB, 198CB ** ON A/C NOT FOR ALL Green, Blue and Yellow Hydraulic System Ground-Service Panel Doors 197CB, 197EB, 198CB ** ON A/C NOT FOR ALL The access door 198CB is installed on the right side of the belly fairing between FR47 and FR48. It gives access to the ground service panel of the yellow hydraulic system and to the hand pump of the cargo doors.
The access door 197EB is installed on the left side of the belly fairing between FR49 and FR50. It gives access to the ground service panel of the blue hydraulic system and to the RAT control panel.
The access doors are quick-opening type and open outboard in the front of the aircraft. They are made of honeycomb core which is bonded between several layers of glass cloth.
Each access door has two hinge assemblies mounted with screws to the the panel boxes of the belly fairing. The hinge assemblies have a mechanism which is spring-loaded when:
- the door opening angle is more than 50 degrees. In this case the hinge assemblies move the access door automatically to the fully open position
- the door opening angle is less than 50 degrees. In this case the hinge assemblies move the access door automatically to the fully closed position.
The green hydraulic system ground-service panel door 197CB is installed on the left side of the belly fairing between FR47/51 and FR52. The door gives access to the ground connection for the green hydraulic system.
The yellow hydraulic system ground-service panel door 198CB is installed on the right side of the belly fairing between FR47/51 and FR52. The door gives access to the ground connection for the yellow hydraulic system and to the cargo door hand pump.
The blue hydraulic system ground-service panel door 197EB is installed on the left side of the belly fairing between FR53 and FR54. The door gives access to the ground connection for the blue hydraulic system and to the RAT control panel.
The doors are quick-opening type doors and open outwards towards the front of the aircraft.
The doors are made of honeycomb core. The honeycomb core is bonded between several layers of glass cloth.
Each door is attached with two hinge assemblies to the belly fairing. The hinge assemblies are attached with screws to the doors and with pins to the support fitting assemblies. The support fitting assemblies are attached with screws to the panel box assemblies.
The spring bolt assemblies are installed and turn between the hinge assemblies and the bearing flange assemblies. They form an overcenter device which keeps the door in the fully open position and helps to close the doors.
The doors have latch assemblies to lock the doors in closed position. The latch assemblies are attached with rivets to the doors. The locking pin of each latch assy engage with the latch hooks; the doors are then aligned with the belly fairing. The latch hooks are attached with screws to the panel box assemblies of the belly fairing.
The access door 197CB is installed on the left side of the belly fairing between FR47/51 and FR52. It gives access to the ground service panel of the green hydraulic system.
The access door 198CB is installed on the right side of the belly fairing between FR47/51 and FR52. It gives access to the ground service panel of the yellow hydraulic system and to the hand pump of the cargo doors.
The access door 197EB is installed on the left side of the belly fairing between FR53 and FR54. It gives access to the ground service panel of the blue hydraulic system and to the RAT control panel.
The access doors are quick-opening type doors and open outboard in the front of the aircraft. They are made of honeycomb core which is bonded between several layers of glass cloth.
Each access door has two hinge assemblies mounted with screws to the panel boxes of the belly fairing. The hinge assemblies have a mechanism which is spring-loaded when:
- the door opening angle is more than 50 degrees. In this case the hinge assemblies move the access door automatically to the fully opened position
- the door opening angle is less than 50 degrees. In this case the hinge assemblies move the access door automatically to the fully closed position.
J. Blue and Yellow Hydraulic-Systems Access-Doors 195BB and 196BB
Access door 195BB is installed on the left side of the belly fairing, between FR40 and FR42, on quick-release access panel 195AB. It gives access to the Blue hydraulic system for maintenance procedures.
Access door 196BB is installed on the right side of the belly fairing, between FR40 and FR42, on quick-release access panel 196AB. It gives access to the Yellow hydraulic system for maintenance procedures.
The access doors are quick-opening type doors which open to the outside and the front of the aircraft.
The structure of the access doors is made of honeycomb core. The honeycomb core is bonded between many layers of glass cloth.
Each access door is attached with two hinge assemblies and a lanyard to the belly fairing. The hinge assemblies are attached to the access doors with screws and to the support fitting assemblies with pins. The support fitting assemblies are attached to the panel box assemblies with screws. The lanyard is attached to each access door with a screw and to a bracket with a screw, a washer and a nut. The bracket is installed on the related quick-release access panel.
The spring bolt assemblies are installed between the hinge assemblies and the bearing flange assemblies. They turn around them. They are used as an overcenter device which keeps the access doors in the fully open position and helps to close the access doors.
The access doors have two latch assemblies to lock the doors in the closed position. The latch assemblies are attached to the structure of the doors with rivets. The locking pin of each latch assembly engages in the related latch hook. The access doors are then aligned with the belly fairing. The latch hooks are attached to the panel box assemblies of the belly fairing with screws.
The lanyard holds each access door in the vertical position.
Access door 195BB is installed on the left side of the belly fairing, between FR40 and FR42, on quick-release access panel 195AB. It gives access to the Blue hydraulic system for maintenance procedures.
Access door 196BB is installed on the right side of the belly fairing, between FR40 and FR42, on quick-release access panel 196AB. It gives access to the Yellow hydraulic system for maintenance procedures.
The access doors are quick-opening type doors which open to the outside and the front of the aircraft.
The structure of the access doors is made of honeycomb core. The honeycomb core is bonded between many layers of glass cloth.
Each access door is attached with two hinge assemblies and a lanyard to the belly fairing. The hinge assemblies are attached to the access doors with screws and to the support fitting assemblies with pins. The support fitting assemblies are attached to the panel box assemblies with screws. The lanyard is attached to each access door with a screw and to a bracket with a screw, a washer and a nut. The bracket is installed on the related quick-release access panel.
The spring bolt assemblies are installed between the hinge assemblies and the bearing flange assemblies. They turn around them. They are used as an overcenter device which keeps the access doors in the fully open position and helps to close the access doors.
The access doors have two latch assemblies to lock the doors in the closed position. The latch assemblies are attached to the structure of the doors with rivets. The locking pin of each latch assembly engages in the related latch hook. The access doors are then aligned with the belly fairing. The latch hooks are attached to the panel box assemblies of the belly fairing with screws.
The lanyard holds each access door in the vertical position.
K. Yellow Hydraulic-System Service-Panel 198DB
Service panel 198DB is installed on the right side of the belly fairing, between FR48 and FR49, on access door 198CB. It gives access to the Yellow hydraulic system for maintenance procedures.
The panel structure is made of honeycomb core. The honeycomb core is bonded between many layers of glass cloth. A bracket for the lanyard is installed on the service panel with two screws.
The service panel is attached with quick-release fasteners and the lanyard of access door 198CB.
The lanyard holds the service panel in the vertical position.
Service panel 198DB is installed on the right side of the belly fairing, between FR48 and FR49, on access door 198CB. It gives access to the Yellow hydraulic system for maintenance procedures.
The panel structure is made of honeycomb core. The honeycomb core is bonded between many layers of glass cloth. A bracket for the lanyard is installed on the service panel with two screws.
The service panel is attached with quick-release fasteners and the lanyard of access door 198CB.
The lanyard holds the service panel in the vertical position.