SPOILERS - DESCRIPTION AND OPERATION
1.  General
A.  The spoilers consist of four ground spoilers and four flight spoilers.
2.  Ground Spoilers
A.  A ground spoiler panel is located inboard of the engine and furthest outboard on each wing. The ground spoiler panels are of bonded honeycomb construction. They are constructed with upper and lower skins of clad aluminum alloy and with a nonperforated aluminum alloy honeycomb core. A continuous phenolic rub strip is bonded to the lower surface at the trailing edge. Dacron covered silicone rubber seals are installed at each end and at the forward edge. The seals at each end are adjustable.
B.  The ground spoilers are attached to wing structure by four hinge fittings equipped with self-aligning bearings. The ground spoilers are attached to wing structure aft of the rear spar. A ground spoiler actuator linkage is attached between wing structure and two arms on the leading edge of the inboard ground spoiler. Bonding jumpers provide an electrical bond between the ground spoiler panels and wing structure.
3.  Flight Spoilers
A.  Spoiler panels raise to provide spoiler action. The panels are of bonded honeycomb construction with upper and lower skins of clad aluminum alloy and a nonperforated aluminum honeycomb core. A continuous phenolic rub strip is bonded to the lower surface at the trailing edge. Dacron covered silicone rubber seals are installed at each end and at the forward edge. The seals at each end are adjustable.
B.  Spoilers are attached to the wing structure by four hinge fittings equipped with self-aligning bearings. The flight spoilers are located forward of the outboard flaps and are attached to wing structure aft of the rear spar. The four flight spoiler actuators are attached between the spoiler panels and wing structure at the spanwise center of each spoiler panel. Bonding jumpers provide an electrical bond between spoiler panels and wing structure.
NOTE:  Some airplanes have graphite/epoxy skinned spoilers in place of clad aluminum alloy spoilers.
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Jun 20/85  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  57-55-0 Page 1