| B&S |
B737-700/800/900 Flight Controls Overview
The roll control surfaces consist of hydraulically powered ailerons and
flight spoilers, which are controlled by rotating either control wheel.
| A&B |
- Ailerons
| A&B |
The pitch control surfaces consist of hydraulically powered elevators
and an electrically powered stabilizer. The elevators are controlled by
forward or aft movement of the control column. The stabilizer is
controlled by autopilot trim or manual trim.
- Stabilizer
| A&B |
| E |
Yaw control is accomplished by a hydraulically powered rudder and a
digital yaw damper system. The rudder is controlled by displacing the
rudder pedals. The yaw damping functions are controlled through the
stall management/yaw damper (SMYD) computers.
- Rudder
| A B&S |
The flaps and slats are high lift devices that increase wing lift and decrease stall speed during takeoff, low speed maneuvering and landing. LE devices
consist of four flaps and eight slats: two flaps inboard and four slats outboard of each engine. Slats extend to form a sealed or slotted leading edge
depending on the TE flap setting. The TE devices consist of double slotted flaps inboard and outboard of each engine. TE flap positions 1–15 provide
increased lift; positions 15–40 provide increased lift and drag. Flaps 15, 30 and 40 are normal landing flap positions.
| B&S |
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.
| B&E |
- Ground Spoilers
| A |
- Flight Spoilers
- Elevators
Roll Control
Pitch Control
Yaw Control
LE Devices and TE Flaps
Speed Brakes
- Trailing Edge Flaps
- Leading Edge Flaps
- Leading Edge Slats
Flight Controls SGR
A = Hydraulic System A B = Hydraulic System B S = Standby Hydraulic E = Electric
