Penalty because of missing seals
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Penalty because of missing seals
Guys,
thanks so much, appreciate your answers.
My question: missing one seal(just an example!!) and in the MEL you got the note:
Takeoff and landing : no penalty
Climb: -635kg
How do you handle this? Any formulas in your head? which tables do you use and is in my example the climb limit weight reduced??
Talking about the 737
Cheers and
Bye
OD
thanks so much, appreciate your answers.
My question: missing one seal(just an example!!) and in the MEL you got the note:
Takeoff and landing : no penalty
Climb: -635kg
How do you handle this? Any formulas in your head? which tables do you use and is in my example the climb limit weight reduced??
Talking about the 737
Cheers and
Bye
OD
Join Date: Dec 2001
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I believe this came about after some tests from Boeing which proved that the lift/stall features of the wing changed significantly with various seals missing/damaged on the slats. I think there was an in flight occurance which triggered this investigation.
Join Date: Oct 2005
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This is a weight penalty. It means that you must calculate the performance as though the airplane weighed that much more. It doesn't perform as well, and will perform as though the airpalne were heavier. This is simply a way of applying a performance penalty in a manner that allows an easy calculation.
If it a standard Boeing-type CDL, it would normally mean that no performance decrements need to be applied for TO and landing but enroute climb performance would suffer. The operating ceiling at a particular instant needs to be calculated using the actual aircraft mass + 635Kg. As I understand it...
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Also, if you were suffering stall characteristics changes, and yet not adjusting speeds to account for stall speed changes ... again, sounds a bit odd.
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Penalty because of missing seals
I have a Lockheed TriStar Service Digest from the 1976 with all 32 pages decated to Fuel Conservation. Here are some of the fuel penalties from the artical, for missing/damaged seals:
Slats - Missing chord wise interslat seal 5,040 to 5,970 gal per year.
Cargo Door - five square inch effective leak 11,750 gal per year.
Passenger Door - five square inch effective leak 11,750 gals per year.
Guys,
thanks so much, appreciate your answers.
thanks so much, appreciate your answers.
Slats - Missing chord wise interslat seal 5,040 to 5,970 gal per year.
Cargo Door - five square inch effective leak 11,750 gal per year.
Passenger Door - five square inch effective leak 11,750 gals per year.
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I have a Lockheed TriStar Service Digest from the 1976 with all 32 pages decated to Fuel Conservation. Here are some of the fuel penalties from the artical, for missing/damaged seals:
Slats - Missing chord wise interslat seal 5,040 to 5,970 gal per year.
Cargo Door - five square inch effective leak 11,750 gal per year.
Passenger Door - five square inch effective leak 11,750 gals per year.
Slats - Missing chord wise interslat seal 5,040 to 5,970 gal per year.
Cargo Door - five square inch effective leak 11,750 gal per year.
Passenger Door - five square inch effective leak 11,750 gals per year.
What's in discussion here is the performance penalty associated with the missing seal.
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That's referencing the economic penalty...or in other words what it cost extra to have the seal missing.
What's in discussion here is the performance penalty associated with the missing seal.
What's in discussion here is the performance penalty associated with the missing seal.
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Regardless of the place where to fing the figure (CDL of course, I guess MEL was a mistake) or the historical remembering, the question was : "How do you handle this? Any formulas in your head? which tables do you use and is in my example the climb limit weight reduced??"