4 Aircraft Assembly Manual
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Three people again are needed to disassemble the
wings.
First block all three wheels for the fuselage to stay
in position. Empty both fuel tanks by opening both
fuel valves inside the cockpit and the drain valve
beneath the bottom of the firewall. Place a canister
under the drain valve to collect fuel.
While you wait for the tanks to empty, disassemble
the horizontal tail surfaces, disconnect all electrical
cables and pitot-static lines. Don’t forget to unscrew
the pitot tube on the bottom side of the right wing.
Then, inside the cockpit, unscrew the middle main
spar bolt first, then unscrew and remove both spar
pin locking bolts.
WARNING!
Do not remove spar pins yet!
Once the fuel tanks are empty, disconnect the fuel
hoses inside the cockpit.
Make sure you tape the end attached to the wing
not to spill any eventual leftover fuel over the fuse-
lage or glass surfaces as substantial damage may
occur.
Two people must now lift the wingtips (one wing-
tip each) and the person in the cockpit remove the
main spar pins, one by one, smoothly.
Forcing pins out of their position may result in struc-
tural damage, therefore the wingtip holders must
hold the wing precisely at certain height!
Using slight circular movement at the wingtip, the
wing-halfs must now be pulled out slowly one at a
time. On pulling, each wing must be held by two,
one at the wingtip and one near the spar.
When the wings have been pulled out, place them
onto a soft surface to prevent damage or store the
wings in dedicated wing racks.
Schematic of wing (dis)assembly
Disassembling the wings
