MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR
MT-7-420
9/02
21
SECTION III
MAJOR COMPONENT PARTS
WINGS:
The complete wing is of metal construction (2024-T3 aluminum) with a fiberglass wing tip.
Spar root end strut fittings are made of 2024-T4 aluminum.
LIFT STRUTS:
The lift struts are streamlined tubes attached to the wing and fuselage by means of AN
standard steel bolts. When inspecting the struts, check for nicks and dents and see that all
bolts are snug (not tight).
In handling the airplane on the ground, care should be take to prevent damage to the lift
struts by pushing or lifting in the middle of the strut. Frequent inspection of the struts should
be made and any paint loss or minor corrosion should be sanded down to bare metal with
fine sandpaper and metal primer should be applied. After the primer is dried, a finish coat of
the desired color may be added.
WARNING: Any unrepairable dents or punctures are cause for replacement of the strut.
(See also page 8, item 7.)
FUSELAGE:
The fuselage is a welded truss type structure having an integral vertical tail fin. Chrome
molybdenum steel (4130) is used for all tube members, control fittings, floor supports and
seat members. Door frames and other nonstructural parts are made of cold rolled steel
(1008 to 1015) or stainless steel (per customer’s request).
If it becomes necessary to replace any fuselage members, sleeve type splices should be
made in accordance with practices outlined in FAA AC 43.13-1, Aircraft Inspection and Re-
pair.
The forward fuselage section is aluminum covered (2024-T3). The firewall is made of
.018 galvanized sheet steel or stainless steel.
The aft fuselage section is covered with Ceconite fabric and standard dope and paint fin-
ish as per Maule Specification S-17. This fabric need not be pulled or punch tested.
