Originally Posted by
Out Of Trim
...The Airfield also appears to have been performance limited for their intended TOW...
Even loaded for BFI-ATH, it's very doubtful that a performance engineering company would have provided a runway analysis (per
AC 120-91 or equivalent) that limited the Bombardier Global 6000 to rwy 32L.
Unfortunately - and for many decades - a majority of the bizjet schoolhouses and training centers have been teaching takeoff performance planning incorrectly... often advocating the application of OEI climb data to (all-engines) SIDs, DVAs and ODPs. Those calculation methods are seriously flawed.
FAA reference:
FAA InFO 18014
Additional FAA resources:
Flight Operations Group - Airport Obstacle Analysis & Aircraft Performance Planning
So it's quite possible -- I'd even go as far as to say "likely" -- that this unfortunate incident began due to faulty performance assumptions/calculations.
With the aid of a professionally provided runway analysis, they could have simply departed from 14R with IFR clearance and been on their merry way.