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SAS used A330 LN-RKH to IAD, Lost its winglet ?

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  • ptbodale
    replied
    Originally posted by Myriad
    Being all technical

    With a missing winglet, other items have to be taken into concideration like Static Discharge, the winglet carries a number (3 i think) of static wicks to discharge static electricity and lightning strikes into the air.

    With a winglet missing, you're now running short on wicks. not a massive problem if all the other wicks are in place, however you could find yourself unstuck if one breaks off down route without a replacement...
    We have had that happen at AC where we had to take a delay to replace a missing static wick. A little thing the Rampies knock off every once in a while, but they have to be replaced.

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  • screaming_emu
    replied
    Would the presence of a yaw damper correct for this automatically? The drag from the wingtip would cause the aircraft to yaw a bit to one side, causing it to fly slightly uncoordinated. In theory, the yaw damper would add whatever rudder needed to keep it coordinated?

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  • AJ
    replied
    It is not many twin engine jets that don't require some rudder trim in flight. Slightly different engine thrusts, differential expansion of metals and damaged skin can all lead to this requirement.

    They all try to fly like a dart, a missing winglet would not cause a massive swing, so a small amount of rudder trim would be all that is required.

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  • screaming_emu
    replied
    Originally posted by MaxPower
    Joe, Would the drag be "large or big" enough to have the captain use slightly more thrust on the other engine ?
    I would say that because the place where the drag is increasing is at the outside edge of the wing you'll have to compensate it somehow. That whole force x arm=moment thing. The longer the arm (size of the wing in this case), the more the drag felt will cause the plane to yaw to one side.

    I'm not entirely sure how they'd compensate for the slight yawing moment. My first inclination would be that they'd use rudder trim, but having the rudder displaced for a long haul flight would probably cause a bit more drag than using differential thrust. But again, it would hardly be noticable how much correction you would need.

    Maybe AJ will be able to shed some light on what they'd do.

    Leave a comment:


  • Myriad
    replied
    Being all technical

    With a missing winglet, other items have to be taken into concideration like Static Discharge, the winglet carries a number (3 i think) of static wicks to discharge static electricity and lightning strikes into the air.

    With a winglet missing, you're now running short on wicks. not a massive problem if all the other wicks are in place, however you could find yourself unstuck if one breaks off down route without a replacement...

    Leave a comment:


  • screaming_emu
    replied
    Originally posted by Myriad
    I Hate to get all technical on you,

    The MEL (Minimum Equipment List) Does not cover items of structure. It also does not cover obvious things like wings or engines.

    For this, you're more likely to find an answer in the CDL (Configuration Deviation List).

    Things like winglets, static wicks, antennaes and panels are covered in this manual.
    bah, what do you think you are, a wrench monkey?

    Leave a comment:


  • Myriad
    replied
    Originally posted by screaming_emu
    not a big deal. Every commercial aircraft has what's called a Minimum Equipment List. This lists all the things on the aircraft that can be broken/missing and the aircraft still be airworthy. The only thing that this aircraft will experience with a missing winglet is a slight increase in drag on the offending wing.
    I Hate to get all technical on you,

    The MEL (Minimum Equipment List) Does not cover items of structure. It also does not cover obvious things like wings or engines.

    For this, you're more likely to find an answer in the Configuration Deviation List. (Its either defect/deviation list cant exactly remember the definition )

    Things like winglets, static wicks, antennaes and panels are covered in this manual.

    Leave a comment:


  • MaxPower
    replied
    Oh okey, so there's not really nothin to worry about. Were expecting a little higher than 1 % though.

    Thanks Dale.

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  • ptbodale
    replied
    AS EMU said, no big deal. There will be a slight increase in fuel consumption (1% if that) because the winglet is missing.

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  • MaxPower
    replied
    Originally posted by screaming_emu
    not a big deal. Every commercial aircraft has what's called a Minimum Equipment List. This lists all the things on the aircraft that can be broken/missing and the aircraft still be airworthy. The only thing that this aircraft will experience with a missing winglet is a slight increase in drag on the offending wing.
    Joe, Would the drag be "large or big" enough to have the captain use slightly more thrust on the other engine ?

    Originally posted by Janni
    We saw it at the CPH meeting this saturday. It lost its winglet a while ago... it doesn't really mean anything, but they'll replace it soon, AFAIK.
    I didnt know that. It didnt said when it actually lost it.

    Leave a comment:


  • janni-chan
    replied
    We saw it at the CPH meeting this saturday. It lost its winglet a while ago... it doesn't really mean anything, but they'll replace it soon, AFAIK.

    Leave a comment:


  • screaming_emu
    replied
    not a big deal. Every commercial aircraft has what's called a Minimum Equipment List. This lists all the things on the aircraft that can be broken/missing and the aircraft still be airworthy. The only thing that this aircraft will experience with a missing winglet is a slight increase in drag on the offending wing.

    Leave a comment:


  • MaxPower
    started a topic SAS used A330 LN-RKH to IAD, Lost its winglet ?

    SAS used A330 LN-RKH to IAD, Lost its winglet ?

    Now that I have caught your attention.

    SAS operated on a SK flight to IAD, using their A333X with the winglet.
    There was a problem with it just before boarding yesterday, So they had to take it off and fly with only the right one.

    Thank g-d they found out about this before the actual flight.

    Sorry about the backlit photo provided by www.cphspotters.dk

    Last edited by MaxPower; 2006-05-22, 10:13.
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