MAULE Orion M-7-260C Maintenance Manual page 11

WARNING: Any unrepairable dents or punctures in strut are cause for replacement of the strut.
NOTE: This aircraft was equipped with sealed struts when manufactured, however, if these struts
were replaced in field with unsealed struts, comply with Maule Service Bulletin No. 11 (and AD# 98-
15-18) as required. (New sealed struts are identified by two weld spots located at upper end. Re-
moval of the upper cuff is needed to locate the weld spots).
9. Remove wheels and inspect wheels, tires, brake disc, bearings, brake lines and
brake pad for wear, cuts, chafing, leaks and general condition. Repack wheel
bearings.
10. Remove landing gear top fairings and inspect attaching fittings and bolts for se-
curity, corrosion, and cracks and inspect brake hose for security, chafing and
leaks.
11. Remove inspection hole cover in fuselage bottom inboard main landing gear
(spring gear) attach points. Visually check bolt/nut attachment for security,
both from below and above. Check fuselage square tube truss for cracks or
bending. Carefully inspect both sides of the spring gear itself at the inboard at-
tachment and along its entire length for abrasion, cracking, corrosion, exfolia-
tion, mechanical damage, or any other adverse conditions. Remove any corro-
sion and prime and paint the affected area. Spray entire inboard area of spring
gear, attachment points, and truss with LPS-3 Rust Inhibitor (LPS Laboratories,
Inc.) or equivalent. The torque on the AN inboard attach bolts must be 240-
300 inch pounds and on outboard clamp bolts 160-190 inch pounds.
NOTE: Service Letter 74 that supersedes Service Letter 66, adds high strength
NAS bolts and tension nuts as the preferred option for outboard and inboard at
tach bolts for aluminum spring gears. These bolts require 450-500 inch lbs.
torque on the inboard attach bolts and 160-190 on the outer attach bolts.
These bolts listed on Service Letter 74 are factory installed on M-7-260C S/N
30061C and up, and affects S/N's 30001C-30060C.
CAUTION: Use Steps 9 and 10, above as a guide for inspection after an unusually hard landing or
any time there is concern about the condition of the main landing gears or their attachments.
12. Remove all inspection covers/plates and inspect all visible control cables, pul-
leys, bellcranks, electrical wires and connections, fuel lines and fittings, nuts,
bolts, etc. for security, chafing, leaks, etc.
NOTE: Check top side of rear elevator horn and cable and bottom side of forward elevator horn and
cable if yellow color-coding paint is visible. If missing, paint per Maule Service Bulletin No. 30.
(CAUTION: If a wing has been removed and reinstalled, or a new wing installed, visually inspect the
routing of aileron cables through the inspection hole cover located on underside of wing, aft of rear
spar and outboard of wing strut attach brackets. Ascertain that cables are not over the strut attach
bracket and are properly routed through the fairleads and around the pulleys. Ref. Maule Service Bul-
letin No. 12.)
13. CAUTION: At inspection hole in tail, visually check the pivoting action at the
control cable attachment points over the full range of rudder and elevator
travel. This action should be such that there are no bending loads imparted to
the turnbuckles (which are designed for straight tension load only).
Rev. C
MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
M-7-260C
FOR
11/37
MECH INSP