Comments from an experienced pilot on type
“The position of the controls recorded by the FDR was pretty consistent with where the flight controls normally rest during taxiing,” he said. On this basis, the gust lock theory would seem less plausible........He explained that part of the Gulfstream takeoff procedure includes feeling the controls lighten as air moves across the tail surfaces early in the takeoff roll. “If we don’t feel that by 60 knots or so, it’s an automatic abort,” he added, while also questioning the takeoff speeds mentioned in the report. “At a light [takeoff] weight, the V1 speed of the GIV should have been about 118 knots,” he said, “with rotation at about 124.” This prompted him to question why the aircraft reached a speed of 165 knots before the crew aborted the takeoff.
Preliminary GIV Crash Report Focuses on Flaps and Gust Lock | Aviation International News