Powerplant

Question 1

The PW 123D series engines comprise, in part:

• 1 axial compressor and one centrifugal compressor.
• 12 cylinders in a V formation.
• 2 centrifugal compressors and a two stage propeller compressor.
• 2 centrifugal compressors, two compressor turbines and a two stage power turbine.

Answer 1

• 2 centrifugal compressors, two compressor turbines and a two stage power turbine.

Question 2

The ECU:

• Provides Np underspeed protection; preventing Np entering the 500 - 780
  prop RPM range.
• Should be selected OFF for normal operations.
• Provides Np overspeed protection; preventing Np entering the restricted
  range, 1200 - 1236 prop RPM.
• Provides automatic torque setting on take off.

Answer 2

• Provides Np underspeed protection; preventing Np entering the 500 - 780
  prop RPM range.

Question 3

Failure of the No. 1 ECU on takeoff prior to setting climb power will be indicated by:

• A significant loss of power on the No 1 engine.
• The “#1 ENG Manual” caution light and no power loss.
• The “#1 ENG Manual” caution light and a significant power loss.
• The “#1 Torque motor” caution light and no power loss.

Answer 3

• The “#1 ENG Manual” caution light and no power loss.

Question 4

If an engine fails to light-off within ten seconds of initiating fuel flow:

• The condition lever should be moved to max.
• The start must be aborted
• The start may be continued.
• A hot start will ensue.

Answer 4

• The start must be aborted

Question 5

The starter engagement limits are:

• Two minutes on, two minutes off (three attempts)
• One minute on, one minute off (three attempts).
• Two minutes on, one minute off (three attempts).
• One minute on, two minutes off (three attempts).

Answer 5

• One minute on, two minutes off (three attempts).

Question 6

The ENGINE INTAKE HTR requires the following conditions to operate:

• Flight in icing conditions with OAT above 15° C.
• OAT above 15°C.
• Flight in icing conditions.
• Engine running, variable AC available, Bypass doors open, OAT 15°C or less.

Answer 6

• Engine running, variable AC available, Bypass doors open, OAT 15°C or less.

Question 7

The power levers, in part:

• Cause the propellers to feather when selected to ‘ discing’.
• Control the propeller blade angle in the ‘beta’ range.
• Must be moved from ‘discing’ to ‘flight idle’ to initiate fuel flow for engine
  starting.
• Are a convenient hand rest for the pilot flying.

Answer 7

• Control the propeller blade angle in the ‘beta’ range.

Question 8

The engine must be shut down if the oil pressure drops below:

• 40 psi
• 30 psi
• 55 psi
• 20 psi

Answer 8

• 40 psi

Question 9

The maximum permissible ITT during an engine start is:

• 600°c
• 1,500°c
• 400°c
• 950°c

Answer 9

• 950°c

Question 10

The recommended Nh rpm range before selecting fuel on is:

• 10% - 19%
• Maximum Nh attainable
• 10% - 25%
• 5% - 19%

Answer 10

• 10% - 19%

Question 11

The engine oil quantity should be:

• Maintained at the full level at all times.
• Checked by a licensed engineer only.
• Checked prior to the first flight of the day.
• Checked within 30 minutes of engine shutdown.

Answer 11

• Checked within 30 minutes of engine shutdown.