DA42 Specific Flashcards
Max. load in nose baggage compartment in the fuselage nose
30 kg
How is ambient air provided to the cabin?
NACA inlet on the lower side of the RH center wing stub
What power and speed setting is used on final approach?
30% for 82kts
What are the gear limitation speeds?
VLOE: 194 kts | VLOR: 156 kts
At Va what are the manoeuvring load factors?
+3.8, -1.52
How long does gear extension / retraction take?
6-10 seconds
Your flaps fail to lower on approach, what is the speed for final?
≥ 85 kts
How much oil does the DA42 consume per hour?
0.1l /hr
Oil is required as a part of the propeller pitch control. Which system is this oil taken from?
Gearbox
What is the main battery connected to?
HOT BUS and BATTERY BUS
What is the structure of the DA42?
Semi-monocoque
Minimum speed in icing conditions
121kts
What assists the hydraulic system in locking the gear in the down position?
Springs
With the emergency switch set to ON, power is provided to:
The attitude gyro (artificial horizon) & the flood light for 1.5 hours
In a flapless circuit, what power setting is used on the base leg?
25%
At what height do you transition from the initial climb to the normal climb?
500ft AGL
The alternator are connected to:
Both alternators are connected to the BATTERY BUS via a 90 Amp circuit breaker.
What are the engine RPM limitations?
2300 with a max overspeed of 2500 for 20 seconds
What speed is VMCA
68kts
The lack of locking varnish on the flight controls is an indication of what?
Twisting and control adjustment
An alternator control unit controls load balancing across each alternator. How does this system function?
Loading is shifted to the alternator with the lowest internal temperature first.
Which is the correct combination for the initial climb?
82 kts, Power: 100%, Pitch: 8
How many fuel injection nozzles are there per engine?
4
Max. load in cabin baggage compartment behind rear seats
45 kg
Where are the static ports located in the DA42’s pitot-static system?
Lower and rear edges of the pitot tube
DA42 control surfaces make use of roll pins. Their absence can result in:
Loss of the hinge pin(s) and flight safety
To unfeather the propeller, the associated ENGINE MASTER switch must be set to ON.
What does this action cause?
Propeller control valve electrically opens, accumulator oil pressure released into the propeller hub.
What is the maximum fuel imbalance?
5 USG
Once engaged, the variable elevator backstop reduces:
2.5° to 13°
Best glide speed
82kts
What is the Standard Stall Recovery?
Nose Down then Power Up until symptoms cease, Wings Level, Gear Up, Flap Up, Speed Increasing? - Select Vy
What is the maximum take off mass for the DA42 - presuming modification?fitted?
1785kg
What is the MZFM?
1650kg
What is the IAS and pitch angle for rotation?
IAS: 70 kts, Load: 100%, Pitch: 5°
To prevent engaging propeller pitch locks engaging, pilots must ensure RPM remains ____ during shutdown?
≥ 1500
Speed range during icing conditions
121-160kts
What is the VFE for landing flaps?
111kts
Which fuel does the L3 Twinstar use?
Jet A-1
What nose attitude is typical for Vy or Vx
13°
What is the minimum RPM required to achieve feathering?
1300
When will the Variable Elevator Backstop engage?
When landing flap is selected and both engines have exceeded 20% load.
Which of the following is correct with regard to the ECUs (multiple choice of 4)
The LH engine uses ECU A and the RH engine uses ECU B.
Either ECU can run both engines
There is an ECU A and ECU B for each engine and both engines normally operate using their ECU A
In the event of an ECU failure an automatic changeover to the other engine’s ECU A occurs
In the event of an ECU failure an automatic changeover to the other engine’s ECU B occurs
Answer (A)
What is the minimum height for engine shutdown?
3000ft
A circuit breaker sits in the distribution line between engine alternators and each respective bus. What Amperage is this
70A
The DA42 power system is best described as what?
28V DC System
The ailerons, elevator and wing flaps are operated by
Control rods
What type of battery does the DA42 have and where is it stored?
24V 10 Amp lead-acid, in the forward baggage compartment.
Speed/Power setting when flying an asymmetric instrument approach
105 kts, 75% power
Maximum demonstrated crosswind limit of the DA42
20kts
The elevator is operated by
Push/pull control rods
Anti-Ice Normal mode
System pumps 1 and 2 operate alternately, each cycling 30 seconds “on” and 90 seconds “off”
Maximum fuel uplift, including unusable
52USG
You experience a fuel issue with the right engine, this will require cross-feeding fuel. What is the correct selection?
Switch the right fuel lever to cross-feed
Approach flap VFE
137
According to L3 SOPs, airspeed must be attained before attempting an engine restart in the air?
> 90kts
What is the material construction of the DA42?
Carbon-fibre Reinforced plastic (CFRP) with Glassfibre Reinforced Plastic (GFRP) bulkheads and stiffeners
What is the maximum operating altitude?
18000ft
Why is the emergency battery for the standby attitude indicator/gyro wirelocked?
To indicate that it has not been used since last checked.
What IAS is required for a Vy/Vx climb?
77kts
Prior to configuring for a landing, what speed is the downwind section of the visual circuit flown at?
55%, 120kts
What are the minimum and maximum oil levels, according to L3 SOPs?
5.0 - 6.0lts
Name the speeds for VNO, VNE and VMCA
VNO 155 KIAS, VNE 194 KIAS, VMCA 68 KIAS
Which engines does the DA42 Twinstar use?
Thielert TAE 125-01 Centurion 1.7
What is the power setting for the base leg in an asymmetric circuit
45%
During engine trouble shooting drill following loss of power of an engine, the engine power was restored by selecting ECU B.
What course of action should you take?
Land at an airfield as soon as possible
What power/speed setting is required for an instrument approach?
105 kts, Power: 55%
The gear warning horn sounds when
Power in any of the two levers is set below 20% load, and the gear is up
The cabin heat and ventilation is supplied
RH engine for seats and floor, LH engine for canopy, fresh air from underside right wing
What type of landing gear is fitted on the DA42?
Fully retractable, tricycle landing gear with gravity assisted extension and hydraulically operated retraction
What is the maximum engine restart pressure altitude?
8000ft
In the event of a total power failure, how long can it be expected that critical services will last for once disconnected?
30 minutes.
The speeds for VMCA, VA, VLE and VNE are?
68kts, 126kts, 155kts, 194kts
During cruise checks you notice a degradation of performance in one of your engines. Fuel is OK, Ts & Ps indicate normal and the temperature outside is -3°C. You have been in and out of moisture but can not see a build up of ice on your wings. Your action is:
Switch to alternate air, the manifold is likely blocked with ice. Remain clear of icing.
Which engine oil is used?
SHELL Helix Ultra 5W-40
Power generation is provided by two
60 Amp alternators (generators)
Maximum prop overspeed
2500
