Diamond DA 62, Flight Manual

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DA 62 AFM Airplane Description
7.5 LANDING GEAR
The landing gear is a fully retractable, hydraulically operated, tricycle landing gear. Struts
for the landing gear are air oil assemblies.
The hydraulic pressure for the landing gear operation is provided by an electrically
powered hydraulic pump, which is activated by a pressure switch, when the required
pressure is too low. Electrically actuated hydraulic valves, which are operated with the
gear selector switch, provide the required hydraulic pressure for the movement of the
landing gear. The gear selector switch is located on the instrument panel. The switch
must be pulled out before it is moved to UP or DOWN position. Gear extension normally
takes 6-10 seconds.
When the landing gear is retracted, the main wheels retract inboard into the center wing
and the nose wheel retracts forward into the nose section. Hydraulic pressure on the
actuators keeps the landing gear in the retracted position. A pressurized gas container
acts as an accumulator which keeps the system pressure constant by replacing the volume
lost due to the normal actuator leakages. This prevents a permanent starting of the
hydraulic pump in flight.
Springs assist the hydraulic system in gear extension and locking the gear in the down
position. After the gears are down and the downlock hooks engage, springs maintain
force on each hook to keep it locked until it is released by hydraulic pressure.
The three green lights directly next to the landing gear operating switch illuminate to
indicate that each gear is in the correct position and locked. If the gear is in neither the
full up nor the full down position, a red warning light on the instrument panel illuminates.
Should one power lever be placed in a position below 25% while the landing gear is
retracted, a warning horn sounds to alert the pilot that the gear is retracted. Additionally,
a CHECK GEAR caution is indicated on the PFD. The same warning appears if the flaps
move into LDG position (fully extended) while the gear is retracted.
Doc. No. 11.01.05-E Rev. 0 11-Jan-2019 Page 7 - 13