Technical data

13773-001
57-50
Page 6 30 Nov 2000
B. Flap Assembly
(1) Removal - Flap Assembly
(a) Cut safety wire securing rod end mounting bolt to the actuation fitting on the flap.
CAUTION: When removing the rod end mounting bolt, exercise caution to prevent the
flap from swinging downward and making contact with the landing gear.
(b) Remove the rod end mounting bolt and washer to allow the flap to swing down to the
underside of the wing.
(c) Remove the cotter pins from each of the flap mounting bolts.
(d) Remove the center hinge bolt, thin washer, four thick washers, (two from each side of the
flap hinge) thin washer, and castellated nut.
(e) Remove the two remaining hinge mounting bolts and remove the flap.
(2) Installation - Flap Assembly
CAUTION: The flap hinge bolts must be installed with the castellated nuts facing
inboard.
(a) Acquire necessary tools, equipment, and supplies.
(b) Place the flap into position and secure with a hinge bolt, thin washer, four thick washers,
(two from each side of the flap hinge) thin washer, and castellated nut at each of the three
hinge mounts.
(c) Secure the three hinge bolts and castellated nuts with cotter pins.
CAUTION: The flap must pivot freely on each of the three hinge bolts. If the flap doesn’t
pivot freely, the problem must be corrected before securing the rod end
mounting bolt and washer.
(d) Gently rotate the flap through its normal range of motion on the hinges and inspect for
smooth operation of the flap.
(e) Secure the rod end to the flap with a mounting bolt and washer.
(f) Safety wire the rod end mounting bolt to the flat actuation fitting on the flap.
Description P/N or Spec. Supplier Purpose
Cotter pin MS24665-134 Any Source Retain part
Safety wire MS20995C32 Any Source Retain part