Systems Flashcards
Engine
PT6A-67P
Reverse Flow
1200HP
Gas Generator Section
4 Axial turbines
1 Centerfugal turbine
1 compressor turbine
Power Section
2 Power turbines
Reduction Gearbox (RGB)
2 stage planetary
Accessory Gearbox (AGB)
2-Gens
Oil pump
HP Fuel pump
LP Fuel pump
Fuel Control Unit (FCU)
Propellor
4 or 5 blades 104-105”
Contant Speed Unit
Primary prop speed control 1700rpm +/-30
Sends oil into the hub to decrease pitch
Overspeed Unit
Secondary prop speed control 1802rpm. removes oil from hub to increse pitch and lower RPM
Also contains Feathering solenoid
Nf Governor
Tertiary prop speed control 1853rpm
works by bleeding air from Py line to get FCU to reduce fuel flow
During Beta and Reverse Nf is primary speed control
Rudder Trim
ON PCL
Trim tab on rudder
Aileron Trim
Hat Switch
Controls trim tab on RT Aileron
Stabilzer Trim
Two motors adjust Horizontal Stab
Hat Switch controls Primary motor
Autopilot controls Secondary motor
Alt Stab Trim controls Secondary motor
Trim Interrupt
Disables ALL trim motors
Flaps
Controlled by the FCWU
FCWU takes input from flap handle and position sensors, relays position info to MAU.
Sends power thru interupt to Power Drive unit
Generators
2 generators
300A max (450a <2 min)
