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15 Questions

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A380 Free Fall System and GDO

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Questions and Answers

Free Fall Control Module (FFCM) Channel A is powered by?

28 VDC Bus 2
28 VDC Bus 1 (correct)
DC Essential Bus
DC Emergency Bus

Free Fall Control Module (FFCM) Channel B is powered by?

28 VDC Bus 2
28 VDC Bus 1
DC Essential Bus (correct)
DC Emergency Bus

Ground Door Opening System (GDO) interfaces with what FFCM Channel?

Channel A
Channel B (correct)
Channel A and B
uses NUA for opening

How many Cut-Out Valves and Vent Valves involve in Free Fall?

3 cut-out valves, one for each landing gear group, Five vent valves, one for each landing gear (A) Signup and view all the answers

Free Fall is a what type of system?

Timer system (A) Signup and view all the answers

1st Step in 6 steps Free Fall

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

2nd Step in 6 steps Free Fall

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. (A) Signup and view all the answers

3rd Step in 6 steps Free Fall

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 (B) Signup and view all the answers

4th Step in 6 steps Free Fall

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

5th Step in 6 steps Free Fall

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

Last Step in 6 steps Free Fall

From 53.5 to 63.5 sec., BLG Gear Emergency Unlock Actuators are energized to release the BLG. (D) Signup and view all the answers

What position of Landing Gear if the independent L/G indication panel has no light?

L/G Up and Locked (B) Signup and view all the answers

What position of Landing Gear if the independent L/G indication panel is RED UnlocKeD?

L/G neither locked up nor locked down, which means discrepancy between L/G lever position and the related L/G status, (C) Signup and view all the answers

When all the Landing Gears are downlocked, the status of the L/G is also displayed on what part of PFD?

Left - Lower (C) Signup and view all the answers

This position of Door Bypass Valve Actuator allows restricted flow of fluid and the door slowly close.

Intermediate (A) Signup and view all the answers