Eclipse 500 System Manual page 86

Section 4. Landing Gear and Brakes
4.7 Abnormal Procedures
4.7.1 Emergency Gear Extension
In the event of a failure of the normal gear extension system a LANDING GEAR FAIL
caution message appears and the gear can be mechanically extended using the
emergency gear release handle on the cockpit floor aft of the pedestal between the
pilots. Emergency extension of the landing gear is accomplished by gravity, with air
load assisted freefall of the nose gear. The momentum of the freefalling gear and the
back-driving of the gear motors ensure the drag/side braces go into the over-center
locked position.
When the emergency gear cable is fully extended, the gear actuator brakes are
mechanically released. When the emergency gear handle is re-stowed, the actuator
brakes are reapplied. If the emergency gear handle is not stowed following an
emergency gear extension an EMER GEAR HANDLE caution message appears
reminding the pilot to stow the handle.
The Emergency Gear Extension procedure is:
1. Put the gear handle in the DOWN position.
2. Reduce airspeed to between 195 and 200 knots
3. Open the emergency release handle door, and pull the emergency release
handle up and aft. This causes two things to happen:
A proximity switch sends a signal to the ACS to remove electrical power from
the three gear actuator motors.
At full throw, the emergency gear handle cable mechanically releases the
actuator brakes, allowing the gear to freefall.
NOTE:
Pulling the emergency gear handle requires approximately 18 lbs of force to
pull and should be pulled to full extension in one smooth motion.
4. When three green Down and Locked indications are displayed, return the
emergency gear release handle to the stowed position to apply the mechanical
actuator brakes.
NOTE:
Actuator brakes will NOT engage unless the emergency gear release handle
is returned to the fully stowed position
4.7.2 Weight On Wheels Sensor Fault
In the event that there is a disagreement between the two weight on wheels sensors,
a WOW SENSOR FAULT advisory message appears.
CAUTION:
This will cause the aircraft to depressurize when the speed goes below 60 KEAS
and the autopilot, including yaw damper and stick pusher, to be lost.
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Copyright © — Eclipse Aviation Corporation
Eclipse 5OO Systems Manual
Version 2.0 April 2007