MEP Class Rating Exam
In asymmetric flight of a conventionally configured twin engine aircraft the effective force
obtained from the use of the rudder?
Reduced with rearward movement of CofG
A typical constant speed unit (CSU) fitted to light twin-engined aeroplanes controls the blade
angle of the variable-pitch propellers and...?
Movement of the rpm lever to increase rpm compresses the control spring, allowing
the governor weights to change the position of the control valve to allow oil from the
CSU oil pump to be directed through the hollow piston rod and turn the propeller
blades to a fine pitch setting
When an engine is stopped on the ground?
The propeller blades remain in the fully fine position
What does climb performance depend on?
Excess of engine power over what is required for level flight
Geometric pitch is a theoretical measurement of propeller efficiency. What reduces the
effective pitch?
Sum of aerodynamic losses
With normally aspirated engines, Vmca...?
Decreases with increasing altitude
To synchorinse propellers you shoukd?
Set MAP & RPM, adjust RPM levers to achieve constant note
Immediately after closing the throttle during a single-engine landing?
There will be a yaw towards operating engine
On a multi engined aeroplane, Vmca...?
May be above or below the stalling speed clean
To increase power on aircraft fitted with constant speed propellers:
RPM first, throttle after
Assuming auxiliary fuel tanks are fitted then how many fuel drains
are there on the DA42 Twin Star?
3 (2 without aux tanks)
On the DA42 Twin Star what is the pressure, (unfeathering) accumulator designed to do after an
engine, which has been deliberately shutdown in flight, is to be restarted?
To allow the propeller blades to move from the fully feathered position towards a low pitch
position to enable airflow to rotate the propeller
The trim system on the DA42 Twin Star comprises?
From within the cockpit, pilot operated elevator and rudder trims
How does the undercarriage system operate on the DA42 Twin Star?
Electrically driven hydraulic pump for raising and lowering the gear with the system pressurised
when the gear is up
What sequence of buttons do you have to press to access the fuel pages on the MFD?
Engine soft key then Fuel soft key
For the DA42 Twin Star the primary electrical system comprises of?
28V AC system with one 24V 10Ah battery and two 60A alternators
Where is the external ground power pin located on the DA42 Twin Star?
Underside of front fuselage on the right
If the Attitude Heading Reference System (AHRS) on the Garmin 1000 system fails, by what
means will this be indicated?
The affected areas on the PFD will be marked with a red cross
With reference to the Garmin 1000 system if a repeating aural tone is heard what does this
mean and what action must the pilot initially take?
It indicates that a Warning Message has been received and a Warning annunciator
will flash on the PFD and must be acknowledged in order to cancel the flashing light
and provide a text description of the message to appear
By what means does the Garmin 1000 system indicate that a given COMM frequency has
been selected for use?
Frequency highlighted green
As part of the pre-flight checks the KAP 140 Autopilot has to be tested after the Avionics
Master Switch has been turned on. What action does the pilot have to take in the first
instance thereafter?
Check that the self checking sequence is completed by observing that all the
display segments are illuminated then press the AP button and then carry out the
“AUTOPILOT TEST” as per the checklist
What is the total capacity of each main fuel tank in the DA42 Twin Star and how much is
useable?
26USG, 25 Useable
On the DA42 Twin Star should both alternators fail in flight what is the likely outcome?
A major problem will arise because as when the main battery eventually fails,
after approximately 30 minutes, both engines will stop
On the DA42 Twin Star why must the engine(s) never be stopped by turning the Fuel OFF or
an attempt made to restart with the Fuel OFF?
May damage high pressure fuel pump
For what form of icing conditions is the DA42 Twin Star cleared to operate in when a fluid de-
icing system in installed and operational?
known icing with certain limitations
What is the maximum permitted fuel imbalance between the main fuel tanks in the DA42
Twin Star?
5USG
What is the maximum speed (Vfe) at which APP Flap can be lowered on the DA42 Twin Star?
137
For an engine fire in flight what is the correct order of the emergency drill INITIAL ACTIONS
according to the Checklist for the DA42 Twin Star?
PWR MAX
Airspeed 82kts
Gear/Flaps UP
Failed engine power lever to idle
ENG MSTR/ALT/FUEL SELEC OFF
When should pulsating boot deicing system be used
After waitijg for formation of ice
Why does fuel injection reduce engine icing?
Carb icing will not occur, only manifold icing
Why is minimum RPM stated for selection of prop feathering system?
Anti featheing latches or high pitch stop may prevent feathering action
Which phenomenon does handing of propellers prevent?
Critical engine
Control sequence for increasing power on propeller is?
Mixture rich, then increase RPM, then increase manifold pressure (Mixture, propeller, throttle)
Va is?
Design manoeuvering speed
Vlor is?
Max speed to raise gear
What is affect in TODR when pressure altitude increases?
TODR to reach screen height is increased
How does moving CofG forward affect critical speed?
Critical speed is reduced as the longer moment arm of the rudder provides more control authority for a given speed
How does CSU keep prop speed comstant?
Opposition of centorfugal and spring forces within CSU
What is immediate action following turn to the left which results in spiral dive?
slip ball to middle using rudder, then level wings using ailerons
How is directional control achieved in asymmetric flight?
5 degree bank to live engine, rudder use towards live engine which will result in balance ball displaced out towards live (think of it as full rudder still not being enough to fully balance)
What causes asymmetric blade effect, particularly dueing asymmetric flight?
Higher AoA leading to descending blades travelling further than ascending blade of live engine
DA42 Gear extension takes how long?
6-10s
G1000 "L/R FUEL TEMP" warning indicates?
fuel temperature above +75C
What are the correct Vy, Vx and Vyse for DA42
Vy and Vx = 79kts, Vyse = 82kts
How is full range of rudder tested on DA42
Pressing rudder fully each way during taxi
What are the correct Vref speeds at MTOM for various flap settings?
UP = 86kts, APP = 82kts, LDG = 82kts
What are the gearbox temperature limits?
No minimum, max = +120C
How does CofG move as fuel is burnt in DA42 main tanks?
Forward
What controls DA42 alternator load balancing?
Alternator control unit, by measuring internal temperature
How is altermatir output displayed on DA42?
Voltmeter and ammeter
Where are DA42 main tank fuel draisn located?
One to underside of each engine nacelle, and one under each wing outboard of engien nacelle
How lomg does deicing system function in NORM mode
2hrs 30mins
What are weight limits of nose and cockpit baggage compartments?
Nose 30kg, cockpit 45kg
What is DA42 crosswind limit?
20kts (LDG Flap), 25kts if flapless
How would you rebalance a fuel imbalance where starboard tank has greatest fuel contents?
Left Engine to CROSSFEED, right engine to ON (fuller tank remains ON, port is left and starboard is right)
How many bearing pointers can HSI display?
2 plus CDI