Shared Flashcard Set

Details

DA42 TAE2.0 Engine, Gearbox, & Propeller
Details and procedures for engine, gearbox, and propeller
52
Aviation
Professional
05/18/2014

Additional Aviation Flashcards

 


 

Cards

Term
Wingspan
Definition
44 feet 5 inches
Term
Height of vertical stabilizer/elevator
Definition
8 feet 2 inches
Term
Fuselage and wing are constructed of what material?
Definition
Carbon Fiber Reinforced Plastic and Glass Fiber Reinforced Plastic
Term
What hazards are associated with the DA42's airframe construction?
Definition
Dents and damage can compromise the structural integrity.

Fires can be very serious since the airframe will readily burn.
Term
What is the Maximum Gross Takeoff Weight?
Definition
3935 pounds
Term
What is the Maximum Landing Weight (MLW) ?
Definition
3748 pounds
Term
Describe the procedure for landing above the MLW.
Definition
Land as normal. No maintenance is required unless there is a hard landing.
Term
Describe the engines.
Definition
Theilert TAE 125-02-99
Turbo Diesel
135 HP at 2300 RPM
Term
Describe the fuel used with the engines.
Definition
Jet A
Term
What is the average fuel burn?
Definition
70% power = 5.5 GPH per engine, 11 GPH total
Term
Where are the engine air inlet and air filter located?
Definition
Lower aft section of the engine cowling
Term
Describe the alternate air system?
Definition
One level activates alternate air for both engines simultaneously.
Term
Describe the turbo-charging system.
Definition
Engine exhaust turns a turbine that turns a compressor to boost the manifold pressure on the intake side. The compressed air is routed through an intercooler to cool the air and make it more dense. The turbo waste gate is controlled by the ECU to adult the amount of compression.
Term
How many fuel pumps are there per engine?
Definition
One engine-driven fuel pump that delivers fuel from the tank to the high pressure fuel pump. The high pressure fuel pump boots pressure to 18,500 PSI in the common rail.
Term
How much fuel does each engine draw?
Definition
20 GPH, but only about 7 GPH is actually burned. Tthat means 13 gallons per hour are returned to the fuel tank.
Term
Why is this plane equipped with a fuel cooler?
Definition
The fuel that is returned is hot because it has been compressed.
Term
What should you do if the L/R Fuel Temp warnings appear?
Definition
Reduce power on affected engine, increase airspeed, transfer fuel from the aux tank. If these are unsuccessful, land ASAP.
Term
How is the engine cooled?
Definition
Liquid cooled through a radiator located in the lower cowling air intake.
Term
Describe the engine cooling system thermostat.
Definition
The thermostat controls whether or not coolant circulates through the radiator to help the engine maintain a consistent temperature above 88˚C.
Term
What coolant is used?
Definition
Distilled water and anti-freeze.
Term
If the L/R Engine Coolant Temp High message appears, what should you do?
Definition
Reduce power on the affected engine(s).
Increase airspeed.
Land if the coolant temperate is not returned to the green range.
Term
What is the significance of the L/R Low Cool LVL message?
Definition
The engine(s) are running out of coolant. Be prepared for an engine failure and land as soon as possible.
Term
How is the oil cooled?
Definition
By an oil cooler, located on underneath the engine
Term
What is the minimum oil quantity for flight?
Definition
4.8 quarts (6.3 quarts max)
Term
What is the gear ration on the engines?
Definition
1 to 16
Term
How is the gear box lubricated?
Definition
Using a separate oil system and combi-pump.
Term
What is the source of oil used to control the propeller blade pitch?
Definition
Gear box oil.
Term
If you get a gear box temperate high message, what should you do.
Definition
Reduce power on the affected engine.
Increase airspeed.
Be prepared for an engine failure
Land as soon as possible.
Term
What function do the ECUs perform?
Definition
ECUs monitor and control important engine parameters.
Term
Name the three main parameters the ECU controls.
Definition
Manifold pressure
Fuel injection quantity and timing
Propeller RPM
Term
What are the possible ECU switch positions?
Definition
AUTO or SWAP (ECU B)
Term
What is the normal ECU switch position?
Definition
AUTO
Term
If you select ECU B and then select AUTO, which ECU will be active?
Definition
ECU B
Term
How can you attempt to clear an L/L ECU A/B FAIL message?
Definition
Power lever to idle
Hold the ECU test button
Term
Where do the ECU get their electric power?
Definition
The left and right alternators power the left and right main buses which are connected to the ECU buses via a diode. Should both alternators and the main battery fail, dedicated ECU standby batteries will power each ECU for approximately 30 minutes.
Term
What are glow plugs and what do they do?
Definition
Glow plugs in each cylinder heat the engine when it is cold to aid in engine starting.
Term
Describe the engine fire detection system.
Definition
A bi-metallic switch in located inside the engine cowling and will close (fuse) if the temperate exceeds 250˚C.
Term
How does the fire detection system alert you to an engine fire?
Definition
Audible alarm and a G1000 CAS message: L/R ENGINE FIRE
Term
What should you do if you receive an engine fire warning?
Definition
Affected engine power lever to IDLE
Affected engine master switch OFF
Last as soon as possible.
Term
Describe the propellers.
Definition
3-blade mt propellers, constant speed/full-feathering
Wood/composite construction with stainless steel edges
Term
Describe the gearbox.
Definition
Reduces engine RPM (3800 RPM) to a lower prop RPM of 2300 RPM.
A clutch decouples the propeller from the engine during engine start and shutdown.
Term
Do the engine and gearbox share the same oil system?
Definition
No, the gearbox has its own oil system, separate from the engine oil system, powered by a combo-pump.
Term
What is the maximum propeller overspeed allowed?
Definition
2500 RPM for 20 seconds
Term
Describe the procedure for handling a propeller overspeed.
Definition
Power lever reduce
ECU SWAP B
If overspeed continues, consider engine shutdown
Last as soon as possible
Term
How is the propeller RPM controlled?
Definition
The ECU controls the prop through a Constant Speed Unit using gearbox oil supplied by the gearbox combo-pump.
Term
What opposing force acts against the gearbox oil pressure inside the prop hub?
Definition
A feathering spring.
Term
What causes the propeller to feather?
Definition
Loss of oil pressure
Term
Do the propeller auto feather?
Definition
No, the engine master must be turned OFF which will cause the CSU to allow oil to flow out of the hub and the feathering spring to feather the propeller.
Term
Why don't the prop blades move to the feather position when you shutdown the engine on the ground?
Definition
Coarse pitch stop pins prevent feathering if the RPM is below 1300 RPM.
Term
What are the memory items for engine failure and shutdown in flight?
Definition
Fly the plane - maintain directional control

Identify the failed engine - dead foot = dead engine

Verify - move the dead engine's power lever to idle and observe no change in aircraft performance.

Affected engine master switch OFF
Term
What is the unfeathering accumulator and how does it function?
Definition
A nitrogen charged cylinder that stores gearbox oil under pressure after engine start.

When the engine master switch is turned on in flight during a re-start, a solenoid opens, allowing the pressurized oil inside the accumulator to flow into the prop hub and move the prop blades out of the feather position.
Term
Describe the engine air start procedure.
Definition
Alternator ON
ECU AUTO
Alternate Air ON if in icing conditions
Airspeed 110 to 120 KIAS (do not exceed 120 KIAS)
Engine master ON
If the prop does not begin windmilling, activate the engine starter.
Supporting users have an ad free experience!