Individual Operators can request relief as you have described. This then becomes a part of their OpsSpecs. Obviously going from KLAX to EGLL and carrying the 10% is a significant penalty if applied for the whole, say eleven hours as opposed to the coast out, coast in segment.
Keep in mind that we are talking about 10% of the time in minutes and not 10% of the fuel in LBS/KGS.
Last edited by Spooky 2; 14th Jan 2013 at 14:41.