Day 2 Progress Check Flashcards
What are the two general types of electric starting systems for gas turbine aircraft?
Direct cranking electrical systems and starter generator systems
What is the purpose of an air impingement starting system?
To direct compressed air onto the turbine blades
Which of the following starting systems is also utilized to provide electrical current to the aircraft?
Starter-generator
How is a cartridge starter activated during a cartridge start?
By electrically igniting the cartridge
Typical maintenance of a starter-generator includes which of the following?
Checking gearbox oil level
How is a turbine engine started?
By engaging the starter system
Why are hydraulic pumps and motors not often used for starting large turbofan engines?
Because of high power demands
What is the source of air used to operate an air turbine starter?
From a ground-operated air cart, the APU, or a cross-bleed start
Why is a starter-generator unit considered desirable?
All of the above
Correct answer
It saves weight and space on the engine
It performs both starter and generator functions
It requires fewer spare parts
What happens if the starter is cut off below the self-accelerating speed during the starting cycle?
Engine deceleration
What is the function of the sprag clutch assembly in an air turbine starter?
To disengage when the engine reaches sufficient speed
Why is it important for the starter to remain engaged after ignition until the engine reaches a self-sustaining speed?
To prevent a hot or hung false start
Which types of starters are commonly found on turbine aircraft?
Air turbine, electric motor, and starter/generators
What is the role of the pressure-regulating valve in the air turbine starter system?
To regulate the pressure of the air going into the starter
Which of the following best describe a typical starting sequence for a turbine engine?
Starter engaged, ignition system ON, fuel system ON, light up, starter disengaged
