Term
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Definition
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Term
| Height of vertical stabilizer/elevator |
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Definition
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Term
| Fuselage and wing are constructed of what material? |
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Definition
| Carbon Fiber Reinforced Plastic and Glass Fiber Reinforced Plastic |
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Term
| What hazards are associated with the DA42's airframe construction? |
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Definition
Dents and damage can compromise the structural integrity.
Fires can be very serious since the airframe will readily burn. |
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Term
| What is the Maximum Gross Takeoff Weight? |
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Definition
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Term
| What is the Maximum Landing Weight (MLW) ? |
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Definition
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Term
| Describe the procedure for landing above the MLW. |
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Definition
| Land as normal. No maintenance is required unless there is a hard landing. |
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Term
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Definition
Theilert TAE 125-02-99
Turbo Diesel
135 HP at 2300 RPM |
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Term
| Describe the fuel used with the engines. |
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Definition
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Term
| What is the average fuel burn? |
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Definition
| 70% power = 5.5 GPH per engine, 11 GPH total |
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Term
| Where are the engine air inlet and air filter located? |
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Definition
| Lower aft section of the engine cowling |
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Term
| Describe the alternate air system? |
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Definition
| One level activates alternate air for both engines simultaneously. |
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Term
| Describe the turbo-charging system. |
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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. |
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Term
| How many fuel pumps are there per engine? |
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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. |
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Term
| How much fuel does each engine draw? |
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Definition
| 20 GPH, but only about 7 GPH is actually burned. Tthat means 13 gallons per hour are returned to the fuel tank. |
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Term
| Why is this plane equipped with a fuel cooler? |
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Definition
| The fuel that is returned is hot because it has been compressed. |
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Term
| What should you do if the L/R Fuel Temp warnings appear? |
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Definition
| Reduce power on affected engine, increase airspeed, transfer fuel from the aux tank. If these are unsuccessful, land ASAP. |
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Term
| How is the engine cooled? |
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Definition
| Liquid cooled through a radiator located in the lower cowling air intake. |
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Term
| Describe the engine cooling system thermostat. |
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Definition
| The thermostat controls whether or not coolant circulates through the radiator to help the engine maintain a consistent temperature above 88˚C. |
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Term
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Definition
| Distilled water and anti-freeze. |
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Term
| If the L/R Engine Coolant Temp High message appears, what should you do? |
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Definition
Reduce power on the affected engine(s).
Increase airspeed.
Land if the coolant temperate is not returned to the green range. |
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Term
| What is the significance of the L/R Low Cool LVL message? |
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Definition
| The engine(s) are running out of coolant. Be prepared for an engine failure and land as soon as possible. |
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Term
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Definition
| By an oil cooler, located on underneath the engine |
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Term
| What is the minimum oil quantity for flight? |
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Definition
| 4.8 quarts (6.3 quarts max) |
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Term
| What is the gear ration on the engines? |
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Definition
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Term
| How is the gear box lubricated? |
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Definition
| Using a separate oil system and combi-pump. |
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Term
| What is the source of oil used to control the propeller blade pitch? |
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Definition
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Term
| If you get a gear box temperate high message, what should you do. |
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Definition
Reduce power on the affected engine.
Increase airspeed.
Be prepared for an engine failure
Land as soon as possible. |
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Term
| What function do the ECUs perform? |
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Definition
| ECUs monitor and control important engine parameters. |
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Term
| Name the three main parameters the ECU controls. |
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Definition
Manifold pressure
Fuel injection quantity and timing
Propeller RPM |
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Term
| What are the possible ECU switch positions? |
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Definition
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Term
| What is the normal ECU switch position? |
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Definition
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Term
| If you select ECU B and then select AUTO, which ECU will be active? |
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Definition
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Term
| How can you attempt to clear an L/L ECU A/B FAIL message? |
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Definition
Power lever to idle
Hold the ECU test button |
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Term
| Where do the ECU get their electric power? |
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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. |
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Term
| What are glow plugs and what do they do? |
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Definition
| Glow plugs in each cylinder heat the engine when it is cold to aid in engine starting. |
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Term
| Describe the engine fire detection system. |
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Definition
| A bi-metallic switch in located inside the engine cowling and will close (fuse) if the temperate exceeds 250˚C. |
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Term
| How does the fire detection system alert you to an engine fire? |
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Definition
| Audible alarm and a G1000 CAS message: L/R ENGINE FIRE |
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Term
| What should you do if you receive an engine fire warning? |
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Definition
Affected engine power lever to IDLE
Affected engine master switch OFF
Last as soon as possible. |
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Term
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Definition
3-blade mt propellers, constant speed/full-feathering
Wood/composite construction with stainless steel edges |
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Term
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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. |
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Term
| Do the engine and gearbox share the same oil system? |
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Definition
| No, the gearbox has its own oil system, separate from the engine oil system, powered by a combo-pump. |
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Term
| What is the maximum propeller overspeed allowed? |
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Definition
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Term
| Describe the procedure for handling a propeller overspeed. |
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Definition
Power lever reduce
ECU SWAP B
If overspeed continues, consider engine shutdown
Last as soon as possible |
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Term
| How is the propeller RPM controlled? |
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Definition
| The ECU controls the prop through a Constant Speed Unit using gearbox oil supplied by the gearbox combo-pump. |
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Term
| What opposing force acts against the gearbox oil pressure inside the prop hub? |
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Definition
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Term
| What causes the propeller to feather? |
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Definition
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Term
| Do the propeller auto feather? |
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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. |
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Term
| Why don't the prop blades move to the feather position when you shutdown the engine on the ground? |
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Definition
| Coarse pitch stop pins prevent feathering if the RPM is below 1300 RPM. |
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Term
| What are the memory items for engine failure and shutdown in flight? |
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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 |
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Term
| What is the unfeathering accumulator and how does it function? |
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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. |
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Term
| Describe the engine air start procedure. |
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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. |
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