Considering that FAR91 was written for FAR 23 and FAR 25 aircraft, it stands to reason that they didn't cite climb gradients, however for those of us operating FAR 25 large aircraft, with safety management systems, safety factors, oversight authorities, noise requirements and SAFA, we cannot operate as per the letter of FAR91, it just isn't acceptable. We have takeoff performance issues with SAFA while in full compliance with FAR121
Sully means Captain Chesley `Sully' Sullenberger III, the Captain of U.S. Airways Flight 1549.
Mutt