The flaps are the devices used during takeoff and approach to give more lift to the aircraft. Each wing has three fowler-type flaps. The flaps are installed on the wing trailing edge between WS47.61 and WS404.00 on four tracks.

The flaps are held on the wing by carriages. The carriages are installed on the flap tracks and flap attachment fittings. The flap tracks are installed on the wing trailing edge. The four flap attachment fittings connect to the ribs in the flap structure.

The leading edges of the flaps are made of molded graphite lamination. The flap leading edges are attached to the flap front spar. An access panel on the leading edge of the flaps give access to the actuator attachment fittings. The access panel is made of aluminum sheet.

The flap tracks, other than the one at WS47.8, have fairings to decrease drag. The flap track on WS47.8 is attached to the center fuselage and does not extend into the airstream.

The inboard flaps are installed on the wing trailing edge between WS47.61 and WS178.00.

The inboard flap structure has the components that follow:

• Front spar, No. 1 and No. 2 mid-spars, and rear spar
• Ribs
• Graphite-laminated skin panels
• Two Graphite-laminated leading edge skins
• Graphite-laminated/Nomex honeycomb sandwich trailing edge

The middle flaps are installed on the wing trailing edge between WS178.00 and WS287.00.

The middle flap structure has the components that follow:

• Front spar, mid-spar, and rear spar
• Ribs
• Graphite-laminated skin panels
• Graphite-laminated leading edge skin
• Graphite-laminated/Nomex honeycomb sandwich trailing edge

The outboard flaps are installed on the wing trailing edge between WS287.00 and WS404.00.

The outboard flap structure has the components that follow:

• Front spar, mid-spar, and rear spar
• Ribs
• Graphite-laminated skin panels
• Graphite-laminated leading edge skin
• Graphite-laminated/Nomex honeycomb sandwich trailing edge

Flap fairings are installed over the flap tracks at WS178.0, WS287.0, and WS404.0. The flap fairings decrease drag. They also provide protection to the flap tracks.

The flap tracks are installed on the wing trailing edge at WS47.8, WS178.0, WS287.0 and WS404.0. The flap tracks have carriages to hold the flaps. The flap track at WS47.8 is attached to the center fuselage and other flap tracks are attached to the rear spar of the outer wing.