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钻石42飞机飞行手册 DA 42 Airplane Flight Manual(97)

时间:2011-10-28 13:17来源:蓝天飞行翻译 作者:admin
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NOTE
The figure on the previous page shows the typical DA 42 installation position for the equipment. The actual installation may vary due to the approved equipment version.
Page 7 - 12  Rev. 5  15-Nov-2007  Doc. No. 7.01.05-E 


Cockpit ventilation
Ventilation in the front is provided by spherical ventilation nozzles (16) in the instrument panel. Furthermore there are spherical nozzles in the roll bar on the left and right side next to the front seats as well as on the central console above the passengers* heads. The spherical nozzles are opened and closed by twisting.


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 above 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. If installed
'  a CHECK GEAR caution is indicated on the PFD additionally. The same warning appears if the flaps move into position LDG (fully extended) while the gear is retracted.
Page 7 - 14  Rev. 5  15-Nov-2007  Doc. No. 7.01.05-E 


To test the gear warning system (refer to 4A.6.1 - PRE-FLIGHT INSPECTION) push the test button close by the gear selector switch. The aural gear alert should appear.
CAUTION
If the aural alert does not appear, an unscheduled maintenance is necessary.
 
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