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Old 21st Jan 2014, 15:19
  #268 (permalink)  
tdracer
 
Join Date: Jul 2013
Location: Everett, WA
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Also heard that the "flapper door" fix for core icing is a no go for the FAA as it raises the EGT substantially. An electric powered heating solution is now apparently in the works - any comments tdracer?
We're still proceeding with the logic to cycle the VBV doors - yes it raises EGT substantially but we've got lots of margin until you get up real close to max con/max climb, where the VBV logic is turned off. Flight testing of the final FADEC logic has already occurred for the -1B on the 787, planned for late this month for the -2B for the 747. A better question is, does cycling the VBV doors really solve the problem? More testing is required to validate that part .
There is a big meeting later today with the FAA to discuss the plans for lifting the AFM ICI limitation after the software is available
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