Engine Pylon Description
Figure 001
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Engine Pylon Stations - Description
Figure 002
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B. Systems The pylon supports all the following systems related to the engine :
(1)
Electrical and hydraulic
(Ref. Fig. 003)
(2)
Fire extinguishing/detection and air system
(Ref. Fig. 004)
(3)
Fuel (Ref. Fig. 005) All pylon bottom surfaces adjacent to the nacelle are fire walls.
C. Compartment (Ref. Fig. 005) For safety purposes the engine pylon is divided into 7 compartments, each houses a particular type of equipment
-------------------------------------------------------------------------------| DESIGNATION | ZONE | SYSTEMS | |--------------------------------- |----------|-------------------------------| |Forward | A | Flammable Fluids (Fuel, | |Fairing | | Hydraulics) | | | B1 | Bleed Air (High And Low | | | | Temperatures) | | | B2 | Electrics | |----------------------------------|----------|-------------------------------| |Pylon Box | C | Hydraulics Without Couplings | | | | Extinguishers | |----------------------------------|----------|-------------------------------| |Rearward Secondary | D | Hydraulics | |Structure | | Limited electrics | |----------------------------------|----------|-------------------------------| |Lower Fairing | E | None | |----------------------------------|----------|-------------------------------| |Pylon to Wing | F | Fuel (No Couplings) | |Center Fillets | | Electrics | | | | Bleed Air (Low Temperature) | -------------------------------------------------------------------------------
Electrical and Hydraulic Installation
Figure 003
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Fire Extinguishing/Detection and Air System Installation
Figure 004
R Fuel System and System Segregation through Compartments Figure 005
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D. Ventilation and Drainage (Ref. Fig. 006) Each compartment is separately ventilated, separately drained overboard. The air of each zone is renewed
(1)
Compartment A Air inlet through the edges of the removable panels (not sealed). Air exit and overboard drain at the trailing edge.
(2)
Compartment B1 Air bleed from precooler supply ducting. Air exit through louvers fitted with an overtemperature detector. Drain : unsealed structure.
(3)
Compartment B2
Vent and drain : unsealed structure.
(4)
Compartment C Air intake incorporated in the access door located on the side of the pylon between RIBs 2 and 3.
(5)
Compartment D
Vent and drain : unsealed structure.
(6)
Compartment E
Vent and drain : unsealed structure.
(7)
Compartment F Vented with the wing vent system. Air exits through a hole in the secondary structure on the side of the pylon panel between RIBs 5 and 7. Air exit and overboard drain at the trailing edge.
Ventilation and Drainage
Figure 006
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PYLONS - REMOVAL/INSTALLATION
_____________________________
TASK 54-50-00-000-001
Removal of the Pylons
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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