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Some aircraft are equipped with autospoilers for a rejected takeoff. When the system is armed for takeoff, the spoilers will automatically extend after the thrust reverse levers are moved to actuate the reversers.
On these aircraft, both the Autospoilers and ABS must be armed for takeoff, or neither must be armed for takeoff. If the Autospoilers or ABS is armed for takeoff – without the other – a CAWS warning is activated when the throttles are advanced for takeoff.
Flaps System
The trailing edge flap system consists of inboard and outboard flap segments of each wing. Each flap is powered by an inboard and outboard hydraulic cylinder. The outboard cylinders are supplied by the left hydraulic system; the inboard cylinders are supplied by the right hydraulic system. Although the flaps normally operate on both hydraulic systems, one hydraulic system is capable of operating the flap system at a reduced rate. All flap segments are mechanically bussed together for simultaneous extension and retraction.
Flaps may be positioned in any of six permanent detents of a 0° to 40° range by movement of the cockpit FLAP/SLAT handle. A takeoff flap selector thumbwheel that positions a movable takeoff detent anywhere in the 0° to 13° and 15° to 24° range may also be used to set takeoff flaps. This selector is used for optimum flap takeoffs.
The preferred sequence for takeoff flaps is listed in Section 5. There is a different preferred sequence for normal takeoffs and contaminated runway takeoffs.
Normal landing flaps is 28° or 40°. Flaps 28° may be required for improved go-around performance situations at MEX. See accuload for more information.
The go-around flap setting is normally 15°. If a high performance go-around is required for MEX, the go-around flap setting is 11°. This will be noted on accuload.
A two-speed restrictor valve system restricts flap travel speed during retraction from 20° to 0°; retraction rate from 40° to 20° is at a faster rate.
Flap Position Indicator
The indicator contains dual, superimposed pointers and a dial which is graduated in degrees of flap travel. Each outboard flap is linked to a separate flap position transmitter that operates one of the dual pointers. The pointers respond to actual flap movement rather than flap control handle movement and will normally move in unison.
Takeoff Warning System
The takeoff warning system provides an aural alert if certain parameters are not properly set for takeoff. The system requires normal electrical power.
When the airplane is on the ground, any one of the following conditions will cause the aural warning system to sound: Either throttle is (or, on airplanes with Service Bulletin 31-34 incorporated or production equivalent, both throttles are) advanced for takeoff and the FLAP/SLAT handle (after being positioned to the takeoff flap setting) is not in agreement with the value set in the FLAP window of the TAKEOFF CONDTN computer, or the horizontal stabilizer is not set within the green-band area of the LONG TRIM indicator, or the slats are not extended, or the spoiler handle is not in the retract detent, flaps extended beyond 260, or the parking brake is set.
Some additional parameters (on some aircraft) that will activate the takeoff warning are: Autospoilers armed with ABS not armed, ABS armed with Autospoilers not armed.
Flap / Landing Gear Warning System
Inflight, if the flaps are extended beyond 26° and the landing gear are not down and locked, the aural warning system will sound until the gear are down and locked.
Inflight, if either or both throttles are retracted to idle, the airspeed is less than 210 knots, and the landing gear are not down and locked, the aural warning system will sound. The aural warning may be silenced by pushing the GEAR HORN OFF button if the flaps are set less than 26°.
Continental
Rev. 12/01/00 #29 Flight Manual
Leading Edge Slat System
The leading edge slat system provides wing lift augmentation. The slats are divided into six segments on each wing that are fastened together and operate as a single unit. The slats normally operate by pressure from both hydraulic systems but will continue to operate, at a reduced rate, with pressure from a single hydraulic system. All slat segments are protected by the anti-ice system.
The slats are manually actuated by the FLAP / SLAT handle. Three slat positions may be selected: retracted, mid-sealed, and extended. When the FLAP/SLAT handle is in the UP / RET position, the slats are retracted. When the FLAP/SLAT handle is in the 0° to 13° range, the slats are in the mid-sealed position. The slats will be in the extended position whenever the FLAP/SLAT is in the 15° to 40° range. The range between 13° and 15° is the DO NOT USE range.
When the FLAP T.O. Selector is used to select a detent in the 0° to 13° range and the FLAP/SLAT handle is moved to that selected detent, the slats will be actuated to the mid-sealed position. When the FLAP T.O. Selector is used to select a detent in the 15° to 24° range and the FLAP/SLAT handle is moved to that selected detent, the slats will be actuated to the extended position.
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