rendezvous
Posts: 531
Joined: Sun May 20, 2001 9:14 pm

747 On Landing

Sat Jun 23, 2001 12:17 pm

While spotting today I noticed that the leading edge flaps inboard of the outer engines on the 747 retract on landing. I was wondering why this happens.

~Rdz
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: 747 On Landing

Sat Jun 23, 2001 1:00 pm

It's a throw back to when turbine reversers were fitted. It was to prevent FOD damage in that area. I am surprised to hear there are still a/c around with that system still operative.
 
rendezvous
Posts: 531
Joined: Sun May 20, 2001 9:14 pm

RE: 747 On Landing

Sat Jun 23, 2001 1:12 pm

Really? I saw several 747-400 aircraft doing this...
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: 747 On Landing

Sat Jun 23, 2001 1:28 pm

Ah.............we are talking -400, I was talking Classic. The reason for the operation is the same however.
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: 747 On Landing

Mon Jun 25, 2001 4:01 pm

Yeah, I'm suprised any classic still has them. Every airplane we took out of the desert we de-activated that function.

I really thought it was an industry-wide, fleet-wide effort.

 
CX Flyboy
Posts: 6026
Joined: Sun Dec 26, 1999 6:10 pm

RE: 747 On Landing

Mon Jun 25, 2001 5:28 pm

We have that on our 747-400s when the thrust reversers are used. The indication in the cockpit is that the flap position indicator on the screen changes from green to magenta, and a few seconds after the reversers are closed, the indication goes back to green again as the leading edge reconfigures back to whatever the flap lever position is at.

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