Systems
This is the primary control parameter for the V2500.
What is Engine Pressure Ratio (EPR)?
This part is designed to prevent buildup of large ice particles without the need for an engine nose anti-icing system.
What is the spinner cone?
These are the three modules that comprise the LPT major module.
What is the LPT rotor and stator, and the Turbine Exhaust Case (TEC)?
The HPC blades are installed in two drums. These are the names of these two drums.
What is the stages 3-8 drum, and the 9-12 drum?
This accessory routes metered fuel to 10 individual fuel lines but also drains fuel away from combustor after shut down.
What is the fuel distribution valve ?
These three components are designed to cool oil :
What are the FCOC, ACOC, and IDG oil cooler?
These parts are positioned between the fan blades and their function is to provide a smooth transition of air flowing into LPC.
What are the Annulus Fillers?
The Turbine Exhaust Case houses two systems for measuring engine parameters. They are :
What is EPR (P4.9) and EGT (T4.9)?
This sensor is installed in the Diffuser case at approximately the 12 o'clock position :
What is the P3/T3 sensor?
This accessory allows continuous oil flow while modulating airflow for thermal management.
What is the fuel distribution valve.
The buffer air is mixed by that.
What is the stage 12 cooled air from the ACAC?
The Forward Bearing Compartment (FBC) is pressurized by air from what location(s)?
Booster discharge for #1 & #3 bearing carbon seals; and Stg 8 air for #2 bearing hydraulic seal.
The #5 roller bearing compartment is sealed on the forward side by a carbon seal supported by this stage air :
What is stage 8 air?
The HPC maintains optimum compressor conditions by utilizing a VSV system. This additional components provides a similar function for the HPC.
What are the stage 7 (x3) and stage 10 (x1) handling valves (or bleed valves)?
This chromel alumel component generates signal voltage that is proportional to the temperature it is exposed to.
What are the EGT probes?
The stage 7 & 10 handling valves, and the high stage valve use 12 stage air for muscle power. The EEC sends a signal to these components which route air to the valves :
What are the solenoids?
There are electronic sensors inside the FBC that measure this :
What is N1 speed (X3), and N1 trim balance sensor (X1)?
This steel component transmits torque from the LPT to the stub shaft:
What is the LPT shaft?
The combustor is centered, aligned, and secured utilizing this many pins:
What are five combustor pins?
The Accessory senses stg. 10 air pressure and will vary the flow of scavenge oil that it receives.
What is the # 4 bearing scavenge valve?
The Fuel Metering Unit (FMU) serves these three purposes:
Fuel Metering, Over-speed Protection & PRSOV
This part not only serves as the mounting location for both the fan module and LPT shaft, but also has a phonic wheel installed for N1 speed and trim balance purposes.
What is the LP stub shaft?
The TEC struts are hollow, and house the following items:
EPR or P4.9
EGT or T4.9
Oil Pressure
Oil Scavenge
The two stage HPT utilizes this unique component to prevent separation of the hubs during removal from the engine:
What is the ladder lock?
The PMA has three separate stator windings inside the unit. These windings provide............................
Electrical supply for EEC A & B N2 derived RPM.