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Missing Flap Track Fairing

Thu Oct 07, 2010 12:12 am

Today I flew on a Delta 757, N625DL. During the flight, I leaned forward so I could see out the window and noticed the middle flap track fairing was missing. You could see the screw that turns as flaps are lowered or raised. I pointed this out to the flight attendant, and he said if it was anything to worry about, the cockpit crew would already know about it. A man two rows in front of me said it was missing before we took off. Since I was in seat 38F, the post between two windows blocked my view of that part of the wing. That's why I didn't notice it until I leaned forward later in the flight. Was this anything to be concerned about?

Bob Bradley
Richmond, VA
Fly Eastern's Golden Falcon DC-7B
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RE: Missing Flap Track Fairing

Thu Oct 07, 2010 12:37 am

It was ok. Sometimes when the Fairing has issues we can remove them for maintance and fly the aircraft with them off. We then place a placard in the log book so the flight crew knows its removed. There's a book in the Flight Deck called a MEL / CDL that covers the items we can remove from the Aircraft and tells the flight crew what kind of issues they can expect from the missing part. Hope this has helped  
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RE: Missing Flap Track Fairing

Thu Oct 07, 2010 12:56 am

Straight out of the MEL/CDL manual for the 757, The item falls under CDL 27-51-1 which states there are 6 installed on the aircraft and up to one per side may be missing. No fuel burn penality but there are a few small weight penalities, no speed penality. Our A-300's with the same CDL item does have a 1% fuel burn penality and only one can be missing out of the 10 installed. I see this item come up 3 or 4 times a year, no biggie.

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RE: Missing Flap Track Fairing

Mon Mar 21, 2011 4:49 pm

Any body have any pictures of what is under the fairing?
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RE: Missing Flap Track Fairing

Wed Mar 23, 2011 4:28 am

Quoting ctempleton3 (Reply 3):
Any body have any pictures of what is under the fairing?

See reply 14:
Why Don't Flaps Fly Off? (by Faro Oct 20 2009 in Tech Ops)#14

This isn't a 757, but it's basically the same hardware.

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RE: Missing Flap Track Fairing

Wed Mar 23, 2011 5:49 pm

A CDL Deffered item.with a fuel penalty due to the added drag.
Nothing serious.
I may not win often, but I damn well never lose!!! ;)
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RE: Missing Flap Track Fairing

Thu Mar 24, 2011 12:25 am

Quoting ctempleton3 (Reply 3):
Any body have any pictures of what is under the fairing?

Funny you should ask...B757 inboard flap track...the forward segment is removed yielding the jackscrew motor, continued aft, carefully you can follow it aft and see the very long screw shaft (only part of it visible)...all this is attached to the larger machined flap track bolted to the wing. It is all beefed up metal and the absence of the fairing during flight is no problem unless it is as you see it in this image. The entire fairing grouping would have to be removed for flight.
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RE: Missing Flap Track Fairing

Thu Mar 24, 2011 1:16 am

Fairings double as anti-shock bodies. They soften up the sudden decrease in aircraft cross-section at the trailing edge.

The engines serve as anti-shock bodies in front of the wings, usually.

So losing a fairing isn't going to make the plane fly out of control, but there will be a fuel penalty.
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