Originally Posted by gleaf
On the gust lock. Not an aircraft control in this case.
NTSB stated that the gust lock was a physical external strap left attached and was visible to ground personnel as they were departing.
I suspect he may have misinterpreted something on that report. I didn't read it that way.
From a system description posted by Mutt on the other thread on this subject:
A.Surface Lock System:
(See Figure 26)
A single T-shaped handle, located on the right side of the cockpit center
pedestal and labeled GUST LOCK, controls the gust lock system. A spring
loaded trigger is incorporated in the gust lock handle to prevent the handle
from inadvertently being pulled. Releasing the trigger and then raising and
pulling the GUST LOCK handle aft actuates conventional mechanical
linkage consisting of cables. springs. latches and a bungee rod. Moving the
ailerons and rudder to the neutral position and the elevator to the trailing
edge down position allows the gust lock to engage and lock the flight
controls as their linkages reach the locking position. Releasing the trigger
and then lowering the GUST LOCK handle releases the gust lock.
Safety Features prevent the gust lock from inadvertently engaging or a
failure of the system preventing gust lock release.With the gust look
released, the bungee rod acts as a fixed rod to prevent inadvertent flight
control locking. If the gust lock fails when engaged, the springs will unlock
the gust took
B.Mechanical Power Lever interlock:
A mechanical interlock is incorporated in the GUST LOCK handle
mechanism that restricts simultaneous movement of the power levers to a
maximum of six percent above ground idle with the gust lock engaged.
Force applied to advance both power levers simultaneously cannot
override the interlock. To prevent any hydraulic forces acting upon an
engaged gust lock. the gust lock should be released prior to engine starting
and not engaged until all hydraulic pressures read zero.