MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR
M-8-235
Rev. B
11/41
MECH INSP
4. Remove front seats and front and center floorboards.
5. Inspect all control cables, pulleys, fairings and electrical connections and wires
for security and chafing.
6. Open zippers in headliner and inspect all control cables, pulleys, fairleads and
electrical connections and wires for security and chafing.
7. Remove wing root fairings and inspect control cables, fairleads, fuel lines and
connections, and electrical wires and connections for security, chafing, and
leaks.
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 that they are properly routed through the fairleads and around the pulleys.
8. Remove wing strut fairings, top and bottom, and inspect attaching fittings and
bolts for security, corrosion, and cracks. Carefully inspect both sides of lift
struts for abrasion, corrosion, pinholes, and punctures. 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.
If powder coating exterior of sealed strut assembly, remove plug from lower end before painting. Oil-
coat internal walls of strut as follows (to be done after painting only): Inject into strut approximately
one quart of Valoil or Lionoil Multi-purpose L-1, Linseed Oil, Paralketone, LPS-3, Randolph Tube Oil
No. 315, Tubeseal (Lineoil) or any other preservative oil conforming to Federal Spec. TT-S-176D, Mil-
C-82309E, Type II or Mil-C-6708, Type I. Reinstall plug and slosh oil until interior of strut is thor-
oughly coated. Remove plug and drain oil from strut. Reinstall plug. Optional: pressure test to 4 psi
+/-1 for leaks using soap solution.
WARNING: Any unrepairable dents or punctures in strut are cause for replacement of the strut.
CAUTION: If aircraft has *original 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.
Removal of the upper cuff is needed to locate the weld spots). Also, do not replace lift struts with
older M-4 struts with the 7/16” dia. lower fork thread. 1/2” dia. is required for later models.
*S/n 15006C may have sealed struts when delivered.
CAUTION: Item (a)(4) of AD# 98-15-18 is very misleading as Maule never drills holes in struts to at-
tach cuffs, door clips or any hardware and it is illegal to do so since there are no approved holes
in the wing struts under the TC data. If aircraft has a modification added requiring a drilled hole
in strut under a #337, refer to AD for inspection requirements at the 24-month intervals. Also,
inspect the area around the holes(s) frequently for corrosion or cracking (ref. SL#58).
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.