Aircraft Engine Maintenance Procedures Quiz

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Where is the starter physically located on a turbine engine?

The fan case

The high pressure compressor case

The internal gearbox

The accessory gearbox (correct)

What type of starter does a large aircraft engine most commonly use?

Electric

Hydraulic (correct)

Fuel-powered generator starter

Pneumatic

Identify a common inspection item on a starter-generator.

Impeller condition

Start valve operation (located upstream from the starter)

Igniter plug condition (correct)

Brush wear

What are the consequences of a pneumatic starter not engaging when an engine start is initiated?

A manual override can be selected on the starter itself (A) Signup and view all the answers

You have just selected 'start' on a double-spool turbofan engine and confirmed that the start valve has opened. What is the first engine parameter that you would observe to confirm starter engagement?

$N1$ rotation (C) Signup and view all the answers

Which scenario could cause an engine tailpipe fire to occur during an engine shutdown procedure?

The fuel tank boost pump was not shut off (D) Signup and view all the answers

Which engine parameter is commonly used with a tach generator to provide display information?

N2 speed (D) Signup and view all the answers

What engine parameter is referenced to determine when to select fuel & ignition 'on' during a double-spool engine start?

N1 speed (D) Signup and view all the answers

In an engine oil pressure system, which engine indication would be displayed?

Engine oil system pressure (B) Signup and view all the answers

What is an example of an engine 'condition' indicator?

Exhaust gas temperature (EGT) (A) Signup and view all the answers

Which two parameters are used to determine engine pressure ratio (EPR)?

High pressure (HP) compressor discharge pressure and total inlet pressure (A) Signup and view all the answers

Which system is used as a performance indicator on a turboprop engine?

Torque percentage (A) Signup and view all the answers

What is the purpose of the PT6 compressor turbine (CT disk)?

Drives the compressors and accessory gearbox (A) Signup and view all the answers

Where is Station 2.5 located in the PT6 illustration?

Inter-compressor fan (A) Signup and view all the answers

What type of combustion chamber is installed in the PT6A engine?

Multi-can (B) Signup and view all the answers

Which gear arrangement does the PT6 reduction gearbox have?

Planetary gears (C) Signup and view all the answers

What does positioning the slide valve on the right side of the chamber indicate about the fuel heater status?

Fuel heater is off (D) Signup and view all the answers

What describes the compressor arrangement on the PT6A engine?

2 stage centrifugal combination compressor (A) Signup and view all the answers

What is the purpose of the second stage fuel pump in the diagram?

Sends unmetered high-pressure fuel to the FCU (C) Signup and view all the answers

Apart from scheduling primary and secondary fuel flow, what is another function of the pressurization and dump valve in the diagram?

Boosts the pressure from the engine-driven fuel pumps to ensure a positive fuel supply (A) Signup and view all the answers

What type of fuel nozzle is depicted in the illustration?

Duplex (B) Signup and view all the answers

Which type of seals are used to keep the oil in the bearing compartment according to the diagram?

Labyrinth (A) Signup and view all the answers

Among the options provided, what is a function of a pressurization and dump (P & D) valve as per the diagram?

Provides fuel flow to the combustion chamber during shutdown (B) Signup and view all the answers

What is the purpose of the fuel heater shown in the diagram?

Prevents freezing of the fuel in cold weather conditions (C) Signup and view all the answers