MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR M-5-220C
Rev. B 33/38
1. Check all bolts and nuts holding the tail springs to the fuselage. They must be tight so
that there is no play or side movement in the springs or their attachment.
2. Tighten the bracket bolt and back off enough to install the cotter pin. There must be
no looseness or play between the bracket (71B) and the spring.
3.
Install the connector springs, using the
heavier spring on the right
Install the
springs so that the light spring is compressed approximately 1/2 to 3/4 inch.
4. Inflate the tire to approximately 45 psi. 20 psi higher pressure may be used if the
wheel has no tendency to shimmy.
The power plant system consists of the engine, engine mount, propeller, cowl, engine con-
trols, exhaust, air intake system and fuel system.
:
Engine instructions covering the care and operation are covered in the engine manufactur-
er’s Operator’s Manual.
:
The propeller manufacturer’s Installation, Operation and Service manual contains infor-
mation on the proper use and care of the propeller.
The engine mount is a welded structure of chrome molybdenum steel (4130) tubing. The
engine is attached to the mount by means of four point suspension to four (4) mounting pads
on the engine case. Each leg attachment incorporates a shock mount designed to absorb tor-
sional fluctuation and vibrations of the engine. The engine mount assembly is bolted at the
firewall to the fuselage structure by means of four (4) 3/8” attaching bolts, (requiring a torque of
13.3-15.8 ft. lbs.) which should be checked for tightness periodically.
An extremely close visual inspection of the engine mount should be made to periodically
check for cracks, dents, weld failures, etc., of the mount tubular members as well as the gen-
eral condition of the mount. At regular intervals, the attaching bolts at the engine should be
checked for tightness (required torque value of 20 +2 in. lbs.) The rubber engine mounts
should be carefully inspected and replaced if necessary at each 100-hour inspection. Exces-
sive engine vibration at various RPM ranges should also prompt their inspection. Care should
be exercised to prevent the rubber mount’s contact with oil as this may result in their premature
deterioration. When torquing any engine or mount bolts, precaution should be taken against
any over-tightening as this also may cause early failure.
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