2.
Mark the electrical wires and terminals to facilitate installation. Remove electrical wires from lift detector: Remove lift detector from aircraft.
INSTALLATION OF LIFT DETECTOR.
1.
Attach the electrical leads to the appropriate terminals of the lift detector.
2.
Position the lift detector with its mounting plate on the wing determining that the sensor blade of the unit drops down freely. and secure in position with the four screws previously removed.
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ADJUSTMENT OF LIFT DETECTOR.
The lift detector switch is adjusted at the factory when the airplane is test flown. and should not require any further adjustment during the normal service life of the airplane. Should some type of service on the wing require removing the switch, the following instructions will help in positioning the switch at the proper position.
Loosen the two Philip's head screws: one on either side of the vane. If the stall warning comes on to late move the switch up. If the stall warning comes on to early. move the switch down. Tighten the screws after making any adjustments.
— CAUTION — NEVER TRY TO ADJUST THE SWITCH BY BENDING THE VANE.
The only way to test the accuracy of the setting is to fly the airplane into a stall condition and note the speed at which the stall warning comes on. The stall should be made with the flaps and landing gear up and power off. It may be necessary to make several test flights and alternate adjustments before the desired setting is obtained. The stall warning should come on not less than five or more than ten miles per hour before the actual stall occurs.
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FLAPS.
WING FLAP CONTROLS.
REMOVAL OF WING FLAP CONTROLS. (Refer to Figure 27-25.)
1. To remove the flap torque tube assembly:
A. Remove the access plate located between the underside of the aft section of each wing and the fuselage by removing attaching screws.
B. Remove the floor panel located aft of the main spar by removing the center seats, seat belt attachments and the screws securing the panel. Lift the panel and remove from airplane.
C. Disconnect the left and right flap control tubes (rods) at the flaps by removing the nuts, washers and bolts or at the torque tube cranks (arms) by removing the bolts and washers from the inner side of each crank. It will be necessary to remove bolt through a hole in the side skin of the fuselage located over the torque tube with the flap handle moved to its 40 degree position.
D. Fully extend the flaps with the flap handle. Disconnect the flap tension spring at the spar or the aft end of the control cable, as desired.
E. Grasp the flap handle, release the plunger, and allow the flap to return to the retracted position. Use caution as forward pressure will be on the handle with the tension spring disconnected.
F. Disconnect the flap return spring at the spar or return chain, as desired.
G. Disconnect the control cable from the chain by removing cotter pin, nut, and clevis bolt.
H. Remove the tube support blocks by removing the block attachment bolts.
I. Remove the nuts, washers and bolts securing the right and left cranks and stop fittings on the torque tube.
J. From between each wing and the fuselage, remove the cranks from the torque tube.
K. Disconnect one bearing block from its mounting brackets by removing nuts, washers and bolts.
L. Slide the tube from the bearing block still attached to its brackets, raise the end and lift it from the floor opening.
2. The flap control cable may be removed by the following procedure:
A. If the center seats and floor panel have not been removed, remove the seats and the screws securing the floor panel.
B. Disconnect the flap tension spring from the cable if not previously disconnected, by extending the flaps to relieve spring tension.
C. Retract the flap. Use caution as forward pressure will be on the handle with the spring disconnected.
D. Disconnect the cable from the chain by removing cotter pin, nut, clevis pin and bushing.
E. Remove the flap handle bracket and trim control wheel cover.
F. Remove the aft heat deflectors on each forward floor tunnel by sliding far enough to release the spring fasteners.
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