Costly, probably, but if the information acquired prevents a descent to warmer air and a tech stop due to the increased fuel burn at that lower level, then worth it. Time consuming, no, done whist refueling is taking place, one sample at the beginning, one in the middle and one at the end. Results available almost immediately. No problem getting it done at LAX, JFK, EWR or BOS.
Last edited by Fly3; 29th November 2012 at 09:49.