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757 Wing "widget"  
User currently offlineAirBowl From , joined Dec 1969, posts, RR:
Posted (5 years 6 months 1 week 1 day 11 hours ago) and read 6156 times:

Always wondered what the "widget" is on the 757 wing?

In this photo the "widget" in question is yellow and centered on the leading edge of the wing over the engine.

http://www.airliners.net/photo/Conti...Airlines/Boeing-757-224/1199124/M/

It looks like a tie-down, but I can't image why a 757 would need a tie-down. Do all Boeing and Airbus models have these? If so, are there any photos of them being utilized?

Thanks for any information.

AirBowl

P.S. First post for this aviation fanatic. Love the site!

13 replies: All unread, jump to last
 
User currently offlineSmcmac32msn From , joined Dec 1969, posts, RR:
Reply 1, posted (5 years 6 months 1 week 1 day 11 hours ago) and read 6155 times:

They are a tie-down/hook for the evac slides....

EDIT: Welcome to a.net, may the search button work as horribly as it does for the rest of us in the future.  Big grin

[Edited 2009-01-05 21:09:28]

User currently offlineSmcmac32msn From , joined Dec 1969, posts, RR:
Reply 2, posted (5 years 6 months 1 week 1 day 11 hours ago) and read 6093 times:


View Large View Medium
Click here for bigger photo!

Photo © Joe V.

A321

View Large View Medium
Click here for bigger photo!

Photo © Bruno Pereira

B737


User currently offlinePygmalion From , joined Dec 1969, posts, RR:
Reply 3, posted (5 years 6 months 1 week 1 day 10 hours ago) and read 5940 times:

Actually no.... they are attach points for a fall protection safety harness rope for people working out on the wing. Especially over the struts where people on the wing are getting near the edge especially wet and icy ones.

in the 90 seconds you get to evacuate, you don't get time to tie down the slide.

They are clearly shown in the maintenance manuals as fall protection attach points


User currently onlineMD11Engineer From , joined Dec 1969, posts, RR:
Reply 4, posted (5 years 6 months 1 week 1 day 8 hours ago) and read 5912 times:

Actually these fittings have two purposes:
1) As Pygmalion has stated, as attachment points for safety harnesses for people working on the wing and
2) as attachment point for a lifeline, which runs from the upper doorframe of the IIRC forward overwing emergency exit to this point to give people a handhold to get into the life rafts should the plane ditch into the sea.

Jan


User currently offlineMender From , joined Dec 1969, posts, RR:
Reply 5, posted (5 years 6 months 1 week 23 hours ago) and read 5772 times:

As MD11 engineer says they are to attach a life line from the overwing exit door frame to the wing surface when the aircraft ditches. They can be found on 757's and 767's that have overwing exits.

Boeing sold 75's and 76's with or without overwing exits depending on the customers choice and I don't recall seeing them on the 757's and 767's that don't have the overwing exits

They are not to attach safety lines for maintenance but i suppose you could attach yourself to it. The maintenance attachment points are flush with the wing surface. The anchor point needs to be pushed into the hole a bit like a pip pin.


User currently offlineTZTriStar500 From , joined Dec 1969, posts, RR:
Reply 6, posted (5 years 6 months 6 days 12 hours ago) and read 5476 times:

They are for life lines in accordance 14 CFR Part 25.1411 paragragh (g)

(g) Life line stowage provisions. If certification for ditching under §25.801 is requested, there must be provisions to store life lines. These provisions must --

(1) Allow one life line to be attached to each side of the fuselage; and

(2) Be arranged to allow the life lines to be used to enable the occupants to stay on the wing after ditching.


User currently offlineHAWK21M From , joined Dec 1969, posts, RR:
Reply 7, posted (5 years 6 months 6 days 8 hours ago) and read 5455 times:

Primary purpose to serve as an attachment point for the evacuation rope to serve as a support during overwater evacuation of pax into life rafts.But can be used by Mx as a safety hold during work.
Although I'd prefer the Vaccum type safety holding equipment for Mx any day.  Smile
regds
MEL


User currently offlineMender From , joined Dec 1969, posts, RR:
Reply 8, posted (5 years 6 months 5 days 20 hours ago) and read 5413 times:



Quoting Mender (Reply 5):
I don't recall seeing them on the 757's and 767's that don't have the overwing exits

I'm wrong about this. I saw an aircraft without overwing exits today but fitted with the attachment point earlier today.


User currently offlineJetplaner From , joined Dec 1969, posts, RR:
Reply 9, posted (5 years 6 months 3 days 16 hours ago) and read 5246 times:

Here's a close-up of one on a Westjet 737-700



When I saw it I had no idea what it was either!

Hope this helps!
-Jetplaner


User currently offlineHAWK21M From , joined Dec 1969, posts, RR:
Reply 10, posted (5 years 6 months 3 days 12 hours ago) and read 5200 times:



Quoting Mender (Reply 8):
I'm wrong about this. I saw an aircraft without overwing exits today but fitted with the attachment point earlier today.

Interesting.Could that be for Mx purposes then.
regds
MEL


User currently offlineMender From , joined Dec 1969, posts, RR:
Reply 11, posted (5 years 6 months 2 days 23 hours ago) and read 5162 times:



Quoting HAWK21M (Reply 10):
Could that be for Mx purposes then.

It's hard to reply to you without sounding like I'm having a pop at you and that's not my intention.

This anchor point is fitted to the wing for passenger evacuation, not for maintenance. It could be used by maintenance crews but it wasn't fitted to the aircraft with that in mind.

It's the same with the 737 NG overwing exit. It can give you access onto the wing upper surface but it wasn't put on the aircraft for that.

Remember, the wings and fuselage are built as separate items then assembled together so there would have to be a specific design request to remove this fitting on aircraft built without the overwing exits, hence it's fitted to some aircraft that don't need it.

Is it fitted to your freighters?


User currently offlineTdscanuck From , joined Dec 1969, posts, RR:
Reply 12, posted (5 years 6 months 2 days 22 hours ago) and read 5160 times:



Quoting Mender (Reply 11):
Remember, the wings and fuselage are built as separate items then assembled together so there would have to be a specific design request to remove this fitting on aircraft built without the overwing exits, hence it's fitted to some aircraft that don't need it.

Although this may be what's going on in this specific situation, there are lots of examples of changes on the wing related to changes on the fuselage (and vice versa). Wings and fuselages are manufactured as matched sets from day one and there's plenty of support in the production systems for airplane-to-airplane variation.

Tom.


User currently offlineHAWK21M From , joined Dec 1969, posts, RR:
Reply 13, posted (5 years 6 months 2 days 10 hours ago) and read 5102 times:



Quoting Mender (Reply 11):
Remember, the wings and fuselage are built as separate items then assembled together so there would have to be a specific design request to remove this fitting on aircraft built without the overwing exits, hence it's fitted to some aircraft that don't need it.

true.But if not needed for evactuation purposes since there is no overwing exit present,defeats the purpose of the equipment located there.

Quoting Mender (Reply 11):
Is it fitted to your freighters?

post convertons the B752F have deactivated doors [non overwing exit type],except the 1L & 1R.
on the B752PCF there are no doors apart from the small relocated L1.
None of the freighters have the link present.

regds
MEL


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