Speed Brakes
The speed brakes consist of flight spoilers and ground spoilers. Hydraulic system
A powers all four ground spoilers, two on the upper surface of each wing. The
SPEED BRAKE lever controls the spoilers. When the SPEED BRAKE lever is
actuated all the spoilers extend when the airplane is on the ground and only the
flight spoilers extend when the airplane is in the air.
The SPEEDBRAKES EXTENDED light provides an indication of spoiler
operation in-flight and on the ground. In-flight, the light illuminates to warn the
crew that the speed brakes are extended while in the landing configuration or
below 800 feet AGL. On the ground, the light illuminates when hydraulic pressure
is sensed in the ground spoiler shutoff valve with the speed brake lever in the
DOWN position.
In-Flight Operation
Operating the SPEED BRAKE lever in flight causes all flight spoiler panels to rise
symmetrically to act as speed brakes. Caution should be exercised when
deploying flight spoilers during a turn, as they greatly increase roll rate. When
the speed brakes are in an intermediate position roll rates increase significantly.
Moving the SPEED BRAKE lever beyond the FLIGHT DETENT causes
buffeting and is prohibited in flight.
The speed brakes consist of flight spoilers and ground spoilers. Hydraulic system
A powers all four ground spoilers, two on the upper surface of each wing. The
SPEED BRAKE lever controls the spoilers. When the SPEED BRAKE lever is
actuated all the spoilers extend when the airplane is on the ground and only the
flight spoilers extend when the airplane is in the air.
The SPEEDBRAKES EXTENDED light provides an indication of spoiler
operation in-flight and on the ground. In-flight, the light illuminates to warn the
crew that the speed brakes are extended while in the landing configuration or
below 800 feet AGL. On the ground, the light illuminates when hydraulic pressure
is sensed in the ground spoiler shutoff valve with the speed brake lever in the
DOWN position.
In-Flight Operation
Operating the SPEED BRAKE lever in flight causes all flight spoiler panels to rise
symmetrically to act as speed brakes. Caution should be exercised when
deploying flight spoilers during a turn, as they greatly increase roll rate. When
the speed brakes are in an intermediate position roll rates increase significantly.
Moving the SPEED BRAKE lever beyond the FLIGHT DETENT causes
buffeting and is prohibited in flight.
