MAULE AIRCRAFT CORPORATION
MAINTENANCE MANUAL
FOR
M-4/C/S/T
15
Rev. B
4/13/16
SECTION III
MAJOR COMPONENT PARTS
WINGS:
The complete wing is of metal construction employing drag bracing and fabric cover or
stressed skin (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 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. Powder coating is recommended if complete strut is being
refinished.
WARNING: Any unrepairable dents or punctures are cause for replacement of the strut. If
airplane has the original unsealed struts, insure compliance with AD No. 98-15-18 (Maule SB
No. 11) (See also page 7, 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).
If it becomes necessary to replace any fuselage members, sleeve type splices should be
made in accordance with practices outlined in FAA AC 43.13-1B, Aircraft Inspection and Re-
pair.
The forward fuselage section is aluminum covered (5052-H34 or 2024-T3). The firewall
and bottom fuselage just aft of the cooling air egress are made of .018 CRS (1008) and is
cadmium plated or primed with zinc chromate or are made of .018 galvanized sheet steel.
The aft fuselage section is covered with Fiberglass fabric and standard dope and paint
finish. This covering is the Razorback method as per Instruction Manual No. 39-5 by Plant-
ers, Inc. Blytheville, AR. This fabric need not be pulled or punch tested.
