MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR
MX-7-420
8
Rev. A
2. Examine all front cockpit electrical connections and wires, fuel lines and fittings,
control cables attachments and pulleys for security, leaks, chafing, etc.
3. Remove rear seat, rear floorboard and panel behind baggage compartment.
4. Inspect all structure, all control cables, pulleys, fairings and electrical connections
and wires for security, chafing and corrosion.
5. Open zippers in headliner and inspect all control cables, pulleys, fairleads and elec-
trical connections and wires for security and chafing.
6. Remove wing root fairings and inspect control cables, fairleads, fuel lines and con-
nections, and electrical wires and connections for security, chafing and leaks. In-
spect wing attach points for security and corrosion.
7. 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 ab-
rasion, corrosion, pin holes 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 add-
ed. Powder coating is recommended if complete strut is being refinished.
WARNING: Any unrepairable dents or punctures in strut are cause for replacement of
the strut.
CAUTION: 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 (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).
CAUTION: Item (a)(4) of AD# 98-15-18 is very misleading as Maule never drills holes
in struts to attach 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 modifica-
tion added requiring a drilled hole in strut under a #337, refer to AD for inspection re-
quirements at the 24-month intervals. Also, inspect the area around the holes(s) fre-
quently for corrosion or cracking (ref. SL#58).
8. Remove wheels and inspect wheels, tires, brake disc, bearings, brake lines and
brake pad for wear, cuts, chafing, leaks and general condition. Repack wheel bear-
ings.
9. Remove landing gear top fairings and inspect attaching fittings and bolts for securi-
ty, corrosion and cracks and inspect brake hose for security, chafing and leaks.
10. Remove all inspection covers/plates and inspect all visible control cables, pulleys,
bellcranks, electrical wires and connections, fuel lines and fittings, nuts, bolts, etc.
for security, chafing, leaks, etc.
