PS-28 Cruiser
PS-28N Cruiser
CR-MM-1-0-00
CHAPTER 4 – WING
Revision No.: 22
Date of issue: 2018-09-27
4 - 6
(d) Remove cover (11, Fig. 4-7) on the bottom wing root.
(e) Disconnect rear attachment bolts on rear spar.
(f) Secure the flap in closed position by means of the cable ties (on flap hinges).
(g) The first person will hold the wing on the wing tip,
(h) One person hold the wing on the winglet side, the second person by the root on the leading
edge side remove first bottom attachment bolt from the main spar, the third person by the
root on the trailing edge.
(h) Release the wing by slight lifting the wing tip upwards.
(i) By pulling the wing in direction from the fuselage, disconnect the outer wing from the
fuselage.
(j) Move the wing about 300 mm (
12 in
) out from the fuselage and disconnect fuel lines, cable
plugs, aileron rod sealing, sockets of electrical systems and on left wing also pitot-static
tubes.
(k) Position the disconnected wing in such a way that its damaging cannot occur.
4.3.2 Wing installation
Type of maintenance: heavy
Authorization to perform:
See point 2.5.3.
Tools needed:
-
wrench size 7/16 in, 1/2 in
-
Phillips PH2 screwdriver
-
pliers
-
hammer
Install the wing according to the following procedure:
(a) Before installation clean the attachments and bolts of the outer and center wing from dirt.
Preserve bolts and attachments by means of lubricating grease.
(b) Set the wing about 300 mm (
12 in
) to the fuselage side. The first person will hold the wing
on the wing tip, the second person near the root on the leading edge and the third person
near the root on the trailing edge.
(c) Connect wiring.
(d) Connect fuel hoses and pitot-static hoses on the left wing; attach the aileron rod sealing.
(e) Set the outer wing carefully with the wing attachments on the center wing so that the
attachments on the wing and on the fuselage are concentric and flap control pin placed in
the flap guiding plate.
(f) The person keeping the wing on the leading edge will insert the first bolt into the upper main
attachment (the bolt head is in flight direction) and shift it by means of slight hammering to
the stop (shifting can be facilitated by slight moving the wing tip up and down). Then insert
the bolts into the lower main attachment and shift them by slight hammering to the stop.