Aircraft Engine Components & Systems

Posted on Mar 13, 2025 in Technology

Aircraft Engine Components and Systems

Bearings and Supports

  • 1: Thrust bearing for low-pressure rotor (LPR)
  • 2: Radial support for the front of the low-pressure compressor (LPC) drive shaft
  • 3: Thrust bearing for high-pressure rotor (HPR)
  • 4: Radial support for the high-pressure compressor (HPC)
  • 5: Radial support for the low-pressure turbine (LPT)
  • Oil-damped bearings: 1, 3, 5
  • Carbon seals (dry-faced): 1, 2, 3, 5
  • Roller bearings: 2,4,5
  • Bearings: 3 (LP rotor), 2 (HP rotor)

Stages and Stations

  • 117 STA #1 & #5
  • 10th, 14th, 17th stages
  • AP1, AP2, AP6, AP8 (Air Ports)
  • 2.5 (14th stage)
  • V 12.5 Fan bypass air
  • 2.5 Exit of LP compressor/booster
  • A1, 1.5, 2, 2.5
  • V LPC (4 stages)
  • HPC (10 stages)

Airflow and Pressures

  • P com burner P4
  • Internal cooling: 2HP, 3LP
  • Inter P2, P2.5, T2.5
  • A1 LPC 3, 1.5, 2, 2.5
  • HPC COM DIFF NGV
  • P3 air
  • P4.0/P2
  • Fan delivery air
  • P2

Engine Components

  • Supply thrust management
  • Control selected components & systems
  • Supply limits for selected engine parameters
  • Supply interface with A/C systems
  • Non-oil parts
  • HPC to gearbox
  • Transmission: LPT to fan disk
  • Sub-assembly rotor HPC: 5
  • Rubber strips
  • Variable stator vanes: 4
  • 10 cool 1st & 2nd stage vanes
  • Aluminum coatings: 3rd stage
  • Turning port: starter & alternator
  • Fan exit guide vanes
  • Arrow #
  • No. 2 bearing support
  • Hose from the upper ignition unit
  • P3T3 differential case
  • Front/rear engine mounts, starter air
  • Core ENGZ1: 1, 2

Fuel System

  • Fuel pump: 2 stages
  • Fuel metering torque motor
  • Fuel flow divider: 10
  • Fuel distribution valve
  • FDRV, FCOC, fuel filter, HP/LP fuel pump, FMU, BSBV actuator, fuel injectors (20), VSV actuator
  • Fuel injectors:20

Electrical and Ignition

  • PMA (Permanent Magnet Alternator): Single
  • Loss of PMA power
  • EEC (Engine Electronic Control) works with N2
  • N1 phonic wheel: 3
  • Ignition exciter unit, ignition lead, electrical connector, air inlet hose, cooling shroud (inner, outer)
  • Electro Charge C, ESD A

Bleed Air System

  • HP compressor
  • 2.5
  • Continuous ring type
  • Linear variable
  • HP air
  • Fully retracted
  • 3 Stage 7, 1 Stage 10
  • 10th stage bleed

Turbine Components

  • HPT (High-Pressure Turbine), LPT (Low-Pressure Turbine)
  • HPT 2nd stage disk & blades
  • Connecting rods
  • High power
  • 4

Other

  • Pressure
  • Oil pump
  • Normal condition
  • Scavenge valve
  • 7 oil chips
  • Integral lube
  • Voluntary international standards