Engines (Powerplant) Flashcards
Mounts
- Uses a three point mounting
system - Two forward mounts which
allow for proper alignment - Aft mount is an adjustable
link - The drag strut provides
forward support and holds
the forward mounting
structure in case of a hard
landing.
FADEC System
- Full Authority Digital
Electronic Control - Automatically controls
engine operation - In the event of a loss of
power from 1 engine, power
from the other automatically increases to maintain rotor RPM (NR)
Gas Producer turbine section
- Mounted on the rear of the compressor rotor shaft and provides the driving force for engine operation self-sustainment
- Shown in blue
Power Turbine
Assembly
- Mounts to the rear of the
power turbine shaft and fits
into the combustor
assembly - Power turbine shaft goes
through the compressor
rotor shaft and provides the
driving force to turn the
rotor system - Shown in red
4 major engine
sections
- Intake
- Compressor
- Combustor
- Exhaust
Oil filler cap
assembly
At the 12 o’clock position just
forward of the starter drive
assembly
Engine Oil Level
indicator
Mounted on the left side of the inlet housing at the 9 o’clock position
Main fuel filter
- Mounts on a bracket on the
left side of the compressor
housing. - Removes contaminants
from fuel prior to the HMA
In line fuel filter
- Mounted at the 2 o’clock
position on each engine - Filters fuel a second time
before it reaches the main
fuel nozzles in the
combustor
Main oil filter
- Mounts on the bottom right
side of the accessory gear
box (AGB) - Filters oil for entire engine
system
NG Indication
System
- NG speed signal provided
by the NG speed Pickup
Assembly mounted on and
driven by the engine oil
pump - Signal only sent to CAAS,
not FADEC - NG over speed of 111% can
cause an over-temp and an
over-torque
Power Turbine
Inlet Temperature
Components
- 5 thermocouple harness
assemblies - Probes insert into, and
mount just prior ti the firs
NP power turbine disk - Average from the 5
thermocouple harness
assemblies sent via the ECU
to cockpit MFDs
(During an engine shutdown) NOTE
— it may be necessary to motor the engines if temperature does not
decrease below 350° C. It may not be possible to lower the temperature to 260° C. If the temperature will not decrease below 260° C, terminate motoring when the
temperature indication stabilizes.
Torquemeter
System
- Torquemeter Junction box
sends signal to the Ratio
Detection Power Supply
(RDPS) - RDPS uses signal to
generate torque indications
in the cockpit.
Power Turbine speed indications (NP)
Signal for indication is provided by the NP speed sensor located at the 8
o’clock position mounted on the accessory gear box
Chip detection
fuzz burnoff
module
Attempts to burn particles in half prior to lighting the caution indicators
