njxc500
Posts: 197
Joined: Mon Dec 24, 2007 6:47 pm

747-400 Independent Gear Retract/extend

Wed Feb 03, 2010 10:55 pm

I have run into a video which shows the gear retracting separately from the other 3.

http://www.youtube.com/watch?v=0KUPDr4Wr1U

Why and how does this happen?

Nick
 
User avatar
CCA
Posts: 773
Joined: Wed Oct 02, 2002 7:29 pm

RE: 747-400 Independent Gear Retract/extend

Wed Feb 03, 2010 11:08 pm

They have left the gear pins in to stop the left body gear and nose gear retracting, you can just barely see the left body gear door still opens and closes during the cycling of the gear lever.

The wing gear (sys #4) definitely wasn't pressurised however the pins would still have been in for safety sake as any residual pressure may have allowed the gear and doors to move, and seeing that the wing gear doors didn't open means there wasn't any pressure applied to them.
P1 in A330, A340, A346, B742, B744, B748.
 
User avatar
HAWK21M
Posts: 29929
Joined: Fri Jan 05, 2001 10:05 pm

RE: 747-400 Independent Gear Retract/extend

Thu Feb 04, 2010 7:33 am

Retraction checks with Landing gear downlock pins will def cause a weakening of the pins over time.

Is there any life of these pins that they need to be replaced after fixed intervals or a check to confirm its material strength is satisfactory for the intended purpose.

regds
MEL.
I may not win often, but I damn well never lose!!! ;)

Who is online

Users browsing this forum: ThomasWarloe and 20 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos