(2)  
Flight control attach fittings.

 (a)  These are fittings used to attach the flight control surfaces and their actuation mechanisms to the wing (Ref 57-42-00).

 (3)  
Landing gear attach fittings.

 (a)  These are the fittings by means of which the main landing gear is attached to the wing and the fuselage. The fittings connecting the main landing gear doors and the wing are considered part of the landing gear attach fitting (Ref 57-43-00).
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 57-40-00
 ALL  ú ú B01 Page 1 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 WING TERMINAL FITTINGS - DESCRIPTION AND OPERATION
__________________________________________________
 1.  General_______
 A.  The wing terminal fitting is a heavy three-flanged forging (Fig. 1). There are four of these fittings, the two forward ones and the two aft ones. Though the concept of use is the same for the four fittings, the structure differs between the forward and the aft fittings. The flanges of the fitting act as a means of connection between the wing boxes and the center wing box.
 2.  Wing Box to Center Wing Box Connection______________________________________
 A.  The wing box to center wing box connection is accomplished by the use of the three flanges of the wing terminal fitting. The places of connection is at the four corners of the center wing box where three main members join: a wing box spar, a center wing box spar and a wing root rib. At any one corner of the center wing box, the two spars and the wing root rib are attached to the three flanges of the fitting.

WING CENTER SECTION

Wing Terminal Fittings
Figure 1

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 57-41-00
 ALL  ú ú B01 Page 1 ú Oct 20/83
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 FLIGHT CONTROL ATTACH FITTINGS - DESCRIPTION AND OPERATION
__________________________________________________________
 1.  General_______
 A.  The aileron attach fittings consist of hinge and actuation mechanism fittings and these are mounted on the aft side of the rear spar, and to structure mounted on that spar.
 B.  The trailing edge flap attachment fittings on each wing consist primarily of two pairs of flap tracks, one pair for each flap assembly. Each flap track is an H-section forging bolted to the lower edges of the wing rear spar and wing ribs, except the inboard track of the inboard flap which is attached to the inboard end of the landing gear support beam and the aft outboard side of the main landing gear wheel well.
 C.  The leading edge flap attachment fittings consist of hinge fittings mounted along the forward edge of the leading edge structure, and actuator mountings on the forward face of the wing front spar.
 D.  The leading edge slat attachment fittings consist of brackets which support the guide rollers and the actuators, all of which are attached to the forward face of the wing front spar.
 E.  The spoiler attachment fittings consist of hinge fittings and the fittings which support the actuation mechanisms. The fittings associated with the outboard set of spoilers are mounted on the aft face of the wing rear spar, and those for the inboard spoilers are on the aft face of the wing rear spar and landing gear support beam.
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 57-42-00
 ALL  ú ú B01 Page 1 ú Oct 20/83
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 LANDING GEAR ATTACH FITTINGS - DESCRIPTION AND OPERATION
________________________________________________________
 1.  General_______
 A.  The landing gear attachment 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.
　
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