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5.  Leading Edge Slats
A.  The outboard section of the leading edge of each wing, from the change in leading edge taper to the wing tip, is provided with three leading edge slats. These slats are auxiliary flight surfaces. The slats are supported on tracks attached to the wing front spar.
6.  Spoilers
A.  The remaining auxiliary flight surfaces are four spoilers along the upper surface of the trailing edge of each wing. Each spoiler hinges upwards from its leading edge. The inboard spoiler is hinged from the aft side of the wing rear spar and the landing gear support beam, and the three outboard spoilers are hinged from the aft side of the wing rear spar. The ground spoilers are located furthest outboard on the wings and inboard of the engines. The flight spoilers are located immediately outboard of the engines. All spoilers lie flush with the wing when faired and can be raised to various angles when in use.
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Wing Flight Control Surfaces  500 
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AILERONS - DESCRIPTION AND OPERATION
1.  General
A.  The ailerons are hinged from the wing rear spars and include balance tabs.
2.  Ailerons
A.  Each aileron is a frame structure consisting of leading and trailing edge spars and ribs, all fabricated from aluminum alloy. A clad aluminum or graphite/epoxy skin is flush-riveted to this structure. An aileron balance tab is attached to the rear spar of the aileron by four hinge bearings. Outboard of the balance tab, the aileron trailing edge is of honeycomb construction. The aileron is provided with four hinge bearings attached to the front spar. Access panels are provided for each hinge bearing. The aluminum nose of the aileron extends forward between the hinge bearings and is connected to one balance panel.
3.  Aileron Balance Tabs
A.  The aileron balance tab is a thin tapered light weight control surface with an aluminum spar, fiberglass honeycomb core, fiberglass or graphite/epoxy skin, and an aluminum alloy nose. It is attached to the aileron rear spar by four hinge bearings.
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TRAILING EDGE FLAPS - DESCRIPTION AND OPERATION
1. General
A.  Each trailing edge flap consists of a midflap, a foreflap and an aftflap. The three flap segments are mechanically separated during flap extension. Each trailing edge flap is supported by two flap carriages which travel on tracks mounted under the wing.
2.  Midflap
A.  The inboard midflap consists of ribs, three spars, a honeycomb trailing edge and clad aluminum skins. A hinged flap segment is attached to the outboard trailing edge of the midflap. Four tracks mounted on the rear spar of the midflap support the aftflap.
B.  The outboard midflap consists of ribs, two spars, a trailing edge beam, two honeycomb trailing edge panels and clad aluminum skins. Four tracks mounted on the rear spar protrude through the trailing edge beam to support the aftflap.
3.  Foreflap
A.  The foreflap is a monospar structure with a honeycomb trailing edge panel and clad aluminum skins. Three curved support beams extend through the lower surface and connect to three foreflap tracks.
4.  Aftflap
A.  The aftflap is also a monospar structure with a honeycomb trailing edge panel and clad aluminum skins. Four carriages are installed on the leading edge of the aftflap.
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LEADING EDGE FLAPS - DESCRIPTION AND OPERATION
1.  General
A.  Two Krueger-type leading edge flaps are installed on each wing. The flaps are numbered 1 through 4 from left to right. Each flap is a machined aluminum casting containing integral ribs and stiffeners. Each flap has four gooseneck hinges which attach to fittings in the leading edge of the wing. A centrally located fitting is also provided on each flap for connecting the flap to a hydraulic actuator. A hinged fairing is installed on the trailing edge of each flap. The fairing extends the full length of the flap on leading edge flaps 2 and 3 and approximately the inboard 70 percent on flaps 1 and 4.
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LEADING EDGE SLATS - DESCRIPTION AND OPERATION
1.  General
A.  Three leading edge slats are installed on each wing outboard of the engine. The slats are numbered 1 through 6 from left to right. The slats consist of ribs attached to a beam, inner and outer clad aluminum skins, and a honeycomb trailing edge. A void between the inner and outer skins provides a path for thermal anti-icing. Anti-icing ducts installed in the slat leading edge connects with hot air supply lines through a telescoping tube. A three-position hydraulic actuator is attached at the center o f the slat. Each slat has two main tracks and two auxiliary tracks which ride on rollers in the wing leading edge.
　
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