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Aviation History
1987
1987 - 2234.PDF
M JTJ 1 Aerodynamic spinner cone (Kevlar) 2 93in-diameter fan: 38 titanium fan blades 3 Mid-span shroud 4 Fan-blade titanium support disc 5 Fan-to-booster attachment botts 6 Abradable Nomex tip shroud 7 Forward steel fan-blade containment case 8 Aft fan case, aluminium with integrally machined stiffeners 9 Acoustically lined air intake (4.85:1 bypass ratio) 10 Ground handling pads 11 Fan case to nacelle inlet duct attachment flange 12 Detachable innerfairing 13 Outlet guide vanes (carbonfibre composite) 14 Composite-structure radial support struts 15 Four-stage low-pressure (LP) compressor spool 16 LP stator blades. Stages two to five are orthogonal to airflow (all blades are titanium) 17 Cast steel intermediate casing 18 Forged and welded thrust brackets 19 Engine mounting attachment pad 20 Fan thrust bearing and oil siinger ring 21 Fan bearing support cone 22 LP compressor-turbine coupling (titanium) 23 LP compressor stability bleed valve 24 Air exit from bleed valve into fan stream 25 LP compressor rotor support roller bearing 26 N, speed sensor 27 HP compressor spool thrust bearing (oil damped) 28 Pressure oil jets to bearing 29 Inlet guide vanes (titanium) 30 Titanium rotor blades 31 Nickel steel stators 32 Eleven-stage HP compressor (welded, three sections) 33 Electron-beam-welded titanium first and second sections 34 Nickel steel rear section 35 Nickel steel HP turbine/HP compressor coupling shaft 36 HorizontaNy split steel case 37 Variable stator actuating rings 38 Eighth-stage air for customer services 39 Ninth-stage air for engine compressor clearance control and turbine cooling 40 Twelfth-stageairforNo.3bearing compartment cooling and turbine cooling 41 Fifteenth-stage air in for No. 2 bearing thrust balance load "muscle" pressure and airflow sensing 42 Compressor discharge pressure and vent seals 43 HP compressor and HP turbine spool roller bearing supported by diffuser case 44 Bearing lubrication oil jets 45 Pressure balance seals 46 Compressor spool controlled air cooling tubes 47 Steel LP shaft 48 No. 3 bearing sump and breather zone 49 Nickel steel diffuser case 50 Outletguidevanesand swirl straighteners 51 Double bypass annular combustion chamber 52 Combustor inner and outer air- insulation blankets 53 Fuel injectors (24) with fuel atomizers 54 Air-cooled stage one cobalt nozzle blades 55 Stage one and two HP turbine rotor discs (nickel steel) 56 Stage one, single-crystal turbine blades, multipass air cooling 5Z Thermal pressure shield and seal 58 Stage two turbine nozzle blade assembly 59 Nickel steel LP turbine case 60 Four-stage LP turbtne rotor assembly (nickel steel) 61 Nickel steel rotor blades and stators, laminar flow aerofoils 62 LP turbine/LP compressor drive coupling flange 63 No. 4 bearing, supported by turbine exhaust case, oil damped 64 Sump and breather zone 65 Steel turbine exhaust case and struts 66 Engine mounting points (both sides) 67 Ground handling points (both sides) 68 Pressure oil to No. 4 bearing 69 Scavenge oil 70 Exhaust nozzle mounting flange 71 Exhaust plug mounting flange 72 Automatic turbine rotor clearance control system actuator 73 Control cable with external heat shield 74 LP turbine and HP turbine air shuft-off valves 75 Air collectors 76 Cooling air inlet duct (air "in" from fan stream) 77 HP turbine air manifolds 78 LP turbine air manifolds 79 Compressor airflow control system bleed valve (two) 80 Variable stator vane (VSV) actuator assembly 81 Bellcrank and adjustable links 82 VSV fuel-actuated actuator 83 Turbine vane and blade cooling air valve, both sides 84 Air valve position switch and indicator 85 Air manifolds to turbine case 86 Compressor rotor heating air-valve thrust balance vent (both sides) 87 No. 3 bearing buffer air-cooler 88 Integrated drive generator system air/oil heat exchangeri both sides) 89 Gearbox drive bevel gear to tower shaft 90 Horizontal layshaft drive to gearbox via angle gearbox 91 Main engine accessory gearbox (aluminium) 92 Mounting lugs and expansion links 93 Mounting frames attached to engine HP compressor case 94 Anti-sway bracket pad 95 Driveshaft torque links 96 Rear hydraulic pump drive-pad 97 Starter drive-pad 98 Electronic engine control alternator housing pad 99 integrated drive generator pad 100 Breather air discharge port 101 Oil tank mounting pad 102 Lubrication and scavenge oil pump drive-pad 103 Scavenge oil connections 104 Pressure oil to filter (left side) 105 Oiltank(SUSgal) 106 Gearbox oil storage cavity 107 Oil filter 108 Fuel/oil cooler and bypass valve 109 Fuel pump and combined filter 110 Fuel inlet pointfrom aircraft 111 Fuel distribution valve 112 Fuel flow to metering unit via fuel-flow transmitter 113 Fuel injector supply manifold (total eight) 114 Fuel and oil drains collector box 115 Overboard pipes and inspection ports 116 Electronic engine control box 117 Ignition exciters (two) mounted on vibration isolators 118 Igniter plug cables (fan-air cooled) to igniter plugs 119 Thermocouple 32 FLIGHT INTERNATIONAL, 31 October 1987
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