Misc Common Questions

Question 1

functions of the EDECU

Answer 1

• thermo couple harness
• Np sensor
• torque/ overspeed sensor
• opposite engine torque for load sharing
• Ng signal from alternator
• Np signal from turbine speed control unit
• feedback signal from HMU

Question 2

sections of the engine and components

Answer 2

• hot: gas generator, gas generator turbine, combustion chamber
• cold: main frame, particle separator, compressor, output shaft assembly
• power turbine: Np & Ng turbines, thermocouple harness, torque overspeed and Np sensor
• accessory: HMU, fuel boost pump and filter, oil filter and cooling and lube, overspeed and drain valve, air turbine starter

Question 3

Utility hydraulic users

Answer 3

Rotor brake
AWS turret
Ammo handling system
APU starter motor
Tail wheel unlock
External stores elevator actuators
Emergency hydraulic system accumulator

Question 4

IPAS users

Answer 4

fuel boost and transfer pump
utility receptacle
nitrogen inserting unit
ECS
windshield wiper/defog
Hydraulic reservoirs (high side)
air turbine starter
Louver doors
external fuel tanks