A380 Free Fall System and GDO

<p>3 cut-out valves, one for each landing gear group, Five vent valves, one for each landing gear</p> Signup and view all the answers

<p>Timer system</p> Signup and view all the answers

<p>From 0 to 7 sec., the cut-out valve actuators are energized to isolate the hydraulic supply from each Landing Gear hydraulic circuit.</p> Signup and view all the answers

<p>From 7 to 14 sec., the Vent Valve actuators are energized. This causes the Vent Valve for each Landing Gear bay to open and there is free flow between the extend/retract ports of the Gear Actuator and the open/close ports of the Door Actuators. This will let the gears and doors fall by gravity when they are released.</p> Signup and view all the answers

<p>From 14 to23.5 sec., the Emergency Unlock Actuators are energized to open the NLG and WLG Door Uplocks and these Doors can free fall</p> Signup and view all the answers

<p>From 23.5 to 44 sec., the Emergency Unlock Actuators of NLG and WLG Gear Uplocks are energized, and these Gears can free fall.</p> Signup and view all the answers

<p>From 44 to 53.5 sec., the BLG Inner/Outer Door Emergency Unlock Actuators are energized to open the BLG Doors.</p> Signup and view all the answers

<p>From 53.5 to 63.5 sec., BLG Gear Emergency Unlock Actuators are energized to release the BLG.</p> Signup and view all the answers

<p>L/G Up and Locked</p> Signup and view all the answers

<p>L/G neither locked up nor locked down, which means discrepancy between L/G lever position and the related L/G status,</p> Signup and view all the answers

<p>Left - Lower</p> Signup and view all the answers

<p>Intermediate</p> Signup and view all the answers