2A-27-80: Gust Lock System:
1. General Description:
The gust lock system for the Gulfstream V provides a means for the flight crew to
manually protect the unpowered flight control surfaces from movement by wind
gusts while the aircraft is on the ground.
The gust lock system is a mechanical ground safety system that neither affects
the flight performance of the aircraft nor receives any flight loads. The ailerons,
elevators and rudder are locked against gust loads, by mechanical latches and a
hook operated by the GUST LOCK handle located on the cockpit center pedestal.
2. Description of Subsystems, Units and Components:
A. Surface Lock System:
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 located in the arm of the GUST LOCK handle to prevent
inadvertent actuation. Raising and engaging the GUST LOCK handle
actuates conventional mechanical components (cables, pushrods and
mechanical latches). This locks the ailerons and rudder in the neutral
position and the elevator in the trailing edge down position.
B. Mechanical Power Lever Interlock:
A mechanical interlock is incorporated in the GUST LOCK handle
mechanism which restricts power lever movement to six percent above
ground idle with the gust lock engaged. Force applied to advance one or
both power levers simultaneously cannot override the interlock.
3. Controls and Indications:
(See Figure 15.)
4. Limitations:
A. Flight Manual Limitations:
There are no limitations for the gust lock system at the time of this revision.
B. Additional Limitations:
The gust lock is only effective in protecting the flight controls in wind gusts
up to 60 knots.
CAUTION
ENSURE HYDRAULIC PRESSURE IS DEPLETED
PRIOR TO ENGAGING GUST LOCK. IT IS NOT POS-
SIBLE TO READ HYDRAULIC PRESSURES AS THE
AIRCRAFT IS POWERED DOWN. CYCLE THE
CONTROLS WITH THE CONTROL COLUMN,
CONTROL YOKE AND RUDDER PEDALS TO
DEPLETE THE RESIDUAL PRESSURE.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-27-00
Page 45
May 22/01
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