Turbines 4

Where is the PT6 engine "split" when performing a Hot Section Inspection

• The "A" flange

• between the reduction gearbox and the power turbine

• The "C" flange

• After the second stage compresser

The Shroud Grinder is used to

• Grind the tips of the turbine blades to decrease the tip clearance

• Grind the tips of the turbine blades to remove small imperfections

• grind the shroud segments to increase the turbine blade tip clearance

• grind the shroud segments to decrease the blade tip clearance.

If a turbine blade is removed from the turbine wheel

• It must be reinstalled 180 degrees from its original position

• it must be installed 90 degrees for its original position

• it must be installed in its original position

• it must be replaced with a new blade

On a PT6 engine, Care must be taken to avoid damaging the

• power turbine when separating the sections during a HSI

• T5 ITT harness and connections

• the fuel nozzels

• the Bleed Off Valve

When removing the PT6 fuel nozzles for replacement or inspection

• the ignighters must be removed first

• the T5 harness must be disconnected

• The ignighters must not be removed

• The ignighters must be replaced with new units

When performing a Hot Section Inspection

• The power section must be removed with the propeller installed

• The propeller must be removed first

• The power section may be removed with or without the propeller installed

• The power section must not be removed

A Hot Section Inspection is performed

• At each 100 hr inspection

• At least annually

• at a specified time interval or when a problem with the engine operation is suspected

• when required by Transport Canada

What type of oil is used in the PT6 engine

• Mineral oil with not additives

• Hi viscosity oil only

• Fully synthetic oil

• depends upon the season and operating temperature

How are the shaft bearings lubricated on a PT6 engine

• Splash

• Pressure/spray

• oil bath

• gravity

Compressor bleed air is used by the airframe for

• pressurization

• deicing

• heating

• all of the above