57-Cont./Effec. Page 57-4 Issued: April 1, 1997
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GENERAL.
This chapter explains the removal and installation procedures for the wings and related components from the aircraft.
DESCRIPTION.
Each wing panel is an all metal, full cantilever, semi-monocoque type structure with removable tips and access panels. Attached to each wing are the aileron, flap, main landing gear and powerplant. Installed in each engine nacelle is a bladder type fuel tank with a capacity of 54 U.S. gallons each or a total capacity of 108
U.S. gallons. The wings are attached to each side of the fuselage by inserting the butt ends of the main spars into a spar box carry through. The spar box is an integral part of the fuselage structure which provides, in effect, a continuous main spar with splices at each side of the fuselage. There are also fore and aft attachments at the front and rear spars.
— Note —
The major subassemblies of the wing may be removed individually or the wing may be removed as a unit. To remove a wing, a fuselage and wing supporting cradle is required
AUXILIARY STRUCTURE.
WING TIP.
REMOVAL OF WING TIP.
1.
Remove the screws holding the wing tip to the wing being careful not to damage the wing or wing tip.
2.
Pull off the wing tip far enough to disconnect the navigation light wire assembly. The ground lead may be disconnected at the point of connection on the wing rib and the positive lead may be disconnected at the wire terminal or unscrewed from the light assembly.
3.
Inspect the fiberglass wing tip to ascertain that it is free of cracks, severe nicks and minor damage.
REPAIR OF WING TIP.
Fiberglass wing tips may be repaired in accordance with fiberglass repair procedures in the structural repairs portion of Chapter 51. Badly damaged thermoplastic tips should be replaced.
INSTALLATION OF WING TIP.
1.
Place the wing tip in a position that the navigation light leads may be connected. Connect the ground lead to the wing rib by use of a screw and nut and the positive lead to the navigation light by connecting the wire terminals or screwing the connectors together. Insulate the wire terminals and be certain that the ground lead is free of dirt and film to insure a good connection.
2.
Insert the wing tip into position and install the screws around the tip. Use caution to refrain from damaging the wing tip or wing. Check operation of the navigation light.
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ATTACH FITTINGS.
WING ATTACHMENT.
REMOVAL OF WING. (Refer to Figure 57-1.)
1.
Close the fuel valve and drain the fuel from the wing to be removed. (Refer to Draining Fuel System, Chapter 12.)
2.
Drain the brake lines and reservoir. (Refer to Draining Brake System, Chapter 12.)
3.
Remove the engine from the wing to be removed. (Refer to Removal of Engine, Chapter 71.)
4.
Drain the hydraulic lines of the landing gear of the wing to be removed by separating the lines and elbows at the actuating cylinder.
5.
Remove the access plate at the wing butt rib and wing inspection panels.
6.
Remove the front and back seats from the airplane.
7.
Expose the spar box and remove the side trim cockpit panel assembly that corresponds with the wing being removed.
8.
Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
— Note —
To help facilitate reinstallation of control cables, power plant controls, and fuel and hydraulic lines, mark cable and line ends in some identifying manner and attach a line where applicable to cables before drawing them through the fuselage or wing.
9.
Disconnect the aileron balance and control cables at the turnbuckles that are located within the fuselage aft of the spar.
10.
If the left wing is being removed, remove the cotter pin from the pulley bracket assembly to allow the left aileron balance cable end to pass between the pulley and bracket.
11.
Disconnect the flap from the torque tube by extending the flap to its fullest degree and removing the bolt and bushing from the bearing at the aft end of the control rod.
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