POWERPLANT

Question 1

What are the four major assemblies of the AE 1107C-Liberty turboshaft engines?

Answer 1

Torquemeter assembly, gas generator assembly, power turbine assembly, and the accessory drive gearbox.

Question 2

The torquemeter assembly transmits __________, measures engine _____, is the front engine mount, and provides a secondary __________ measurement.

Answer 2

Engine output power, Qe, and secondary power turbine shaft speed (Np).

Question 3

The gas generator assembly consists of what?

Answer 3

Compressor assembly, combustor assembly, and the gas generator turbine.

Question 4

The compressor is a __ stage, axial flow compressor with the first 5 rows of compressor vanes are __________, and the last 8 rows are __________.

Answer 4

14, variable geometry, stationary.

Question 5

The power turbine assembly, converts gas into __________ to drive the __________.

How many thermocouples are mounted?

Answer 5

Shaft power, PRGB

14

Question 6

The accessory drive gearbox drives the _____, __________ and __________. A hydraulic engine start motor is also mounted on the gearbox.

Answer 6

FPMU, engine oil pump and regulator assembly, and a PMA (permanent magnetic alternator).

Question 7

Engine sensors provide what eight things to the FADEC?

Answer 7

T2
P2
MGT
Ng
Np
Qe
Wf
CVG position

Question 8

What five requirements must be met for the COANDA Exhaust Deflector System to activate?

Answer 8

Engine torque less than 28%
Ng greater than 67%
Nacelle angle greater than 52°
MGT less than 593°C
NIU receives WOW indication.

Question 9

When engine Ng speed is above 40% what provides power to the FADECs?

Answer 9

Permanent Magnetic Alternator