LANDING GEAR ATTACH FITTINGS - DESCRIPTION AND OPERATION
1. General
A. The landing gear attachments consist of fittings to which the gear side strut and reaction link connect, the forward and aft trunnion bearings, the landing gear door hinges and the actuator support beam fitting.
B. The side strut and the reaction link are attached to fuselage fittings at body stations 685 and
695. the aft trunnion bearing is incorporated in the landing gear support beam. The forward trunnion bearing is mounted in a heavy forged fitting on the wing rear spar. The landing gear door is hinged from a short beam between the forward face of the landing gear support beam and the aft face of the wing rear spar. The outboard end of the actuator support beam is supported by a fitting attached between the landing gear support beam and the wing rear spar.
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Apr 15/66 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 57-43-0 Page 1
ENGINE HOIST ATTACH FITTING - DESCRIPTION AND OPERATION
1. General
A. Six engine hoist attach fittings are installed on the front and rear spars and are located behind access panels on the bottom surface of the wing. Four fittings are located on the forward spar, two on each wing. Two fittings are located on the aft spar, one on each wing.
B. These fittings form a receptacle for the attachment of ground support equipment to the wing for removal and installation of engines (Ref 71-00, R/I).
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Feb 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 57-44-0 Page 1
ENGINE HOIST ATTACH FITTING - REMOVAL AND INSTALLATION
1. General
A. The engine hoist attach fitting is located behind access doors 6275, 6376, 8475 on left wing lower surface and 6579, 6476, 8575 on right wing lower surface. One procedure is provided for all six fittings with differences in installation noted.
2. Remove Engine Hoist Attach Fitting (Fig. 401)
A. Open applicable access panel on wing lower surface.
B. On airplanes with alternate fitting installation, remove nut, bolt, washers and shim securing fitting to spar fitting.
NOTE: It will be necessary to cut the bolt head from the bolt on fittings attached to the rear spar.
C. On airplanes with the preferred fitting installation, remove cotterpin, nut and bolt.
D. Remove fitting from spar fitting.
3. Install Engine Hoist Attach Fitting (Fig 401)
A. Install fitting to spar fitting with shoulder bolt nut and cotterpin. Bolt head direction optional for forward spar installation. Bolt head outboard on aft spar installations.
B. Install appropriate access panel on wing lower surface.
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Feb 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 57-44-0 Page 401
Engine Hoist Attach Fitting 500
57-44-0 Figure 401 Feb 20/84
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FLIGHT SURFACES - DESCRIPTION AND OPERATION
1. General
A. The wing flight surfaces consist of ailerons, trailing edge flaps, leading edge flaps, leading edge slats, and spoilers (Fig. 1).
2. Ailerons
A. The ailerons are the major wing flight control surfaces. Each wing has an aileron. Each aileron is hinged from ribs attached to the rear spar, and is provided with a tab along its trailing edge.
3. Trailing Edge Flaps
A. The trailing edge flaps are auxiliary surfaces. Each wing has an inboard and an outboard trailing edge flap assembly. Each of these assemblies are triple slotted, consisting of three component sections: the foreflap, the midflap and the aftflap. Each complete trailing edge flap assembly is supported on the wing by two flap tracks, and is moved along these tracks to assume its various extended positions.
4. Leading Edge Flaps
A. The leading edge flaps are auxiliary surfaces. The inboard section of the leading edge of each wing is provided with two leading edge flaps. These flaps hinge downwards from the forward side of the wing front spar, and are equipped with nose sections which hinge inward when the flaps retract flush with the wing lower surface.
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