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B744 Landing: Flap Settings?  
User currently offlineSevenHeavy From United Kingdom, joined Mar 2004, 1126 posts, RR: 10
Posted (8 years 12 months 4 days ago) and read 2242 times:

Hi,

When landing on a B744 last week I noticed just after touchdown that the two more inboard sets of leading edge flaps remained retracted for landing. The outermost set (outboard of engines 1+4) were extended.
Then as we were taxiing off the runway I noticed the previously retracted flaps moving out to their fully extended position, only to be retracted again before pulling on to stand!  Confused.
I have not seen this before in numerous commercial flights.

My question is, what was the reason? Is there an operational motive, or was it a technical malfunction, or even an error by the crew?

Thanks for any input,


Regards,

SevenHeavy



So long 701, it was nice knowing you.
3 replies: All unread, jump to last
 
User currently offlineArmitageShanks From UK - England, joined Dec 2003, 3361 posts, RR: 16
Reply 1, posted (8 years 12 months 3 days 23 hours ago) and read 2197 times:

I believe they retract like that when thrust reverse is selected becase water spray freezing under the slats could pose a problem. Anyone else know for sure?

[Edited 2004-05-22 21:39:36]


Check your bags, check your brain.
User currently offlinePhilsquares From , joined Dec 1969, posts, RR:
Reply 2, posted (8 years 12 months 3 days 23 hours ago) and read 2197 times:

The leading edge devices were designed that way. Sorry no crew error or technical malfunction.

Mr. Boeing designed the devices to retract during reverse thrust to minimize the potential damage from foreign objects being blown into the leading edges.

That's it, plain and simple.

User currently offlineSevenHeavy From United Kingdom, joined Mar 2004, 1126 posts, RR: 10
Reply 3, posted (8 years 12 months 2 days 10 hours ago) and read 1873 times:

And there I was thinking I'd witnessed something extrordinary!!! Smile
Makes perfect sense when you think about it, my respect for aircraft manufacturers survives intact.

Thanks for the input, it's things like this that make this website - I could not have got a faster, more concise response if I had called boeing themselves!

Regards,

SevenHeavy


So long 701, it was nice knowing you.
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