MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR M-5-220C
Rev. B 19/38
:
Adjust the ailerons to streamline position by placing a straight edge on the bottom of the
wing chordwise at the inboard end of the aileron. Then adjust the turnbuckles in the aileron
system so the control wheels are centered and there is a gap of zero to ¼ inch between the
straight edge and the trailing edge of the aileron.
Check the aileron travel for 20° ±1° up and 20° ±1° down. Adjust turnbuckles to stay within
these limits. Proper cable tension is 15 to 25 lbs.
Correct flap operation is dependent upon correct cable tension which is controlled by the
spring on the bellcrank in the wing. If the spring tension has diminished due to use or over
extension, this will reduce the degree of flap extension due to air loads on the flaps. If springs
appear weak, remove and check the spring tension. One inch of travel should yield a force of
twelve (12) to fifteen (15) pounds. If the tension is less than above, replace both springs with
new springs.
After verifying acceptable spring tension, check cable adjustment. Changes can be made
to the flap retract cable via the turnbuckle located behind the rear cabin bulkhead cover. Ad-
just retract cable as tight as possible without disengaging the flap lock mechanism located in
the wing at the bellcrank, if equipped. On airplanes that incorporate the flap lock mechanism,
adjustment can be checked by pushing down lightly on the trailing edge of the flap (left then
right). The flap should travel down one (1) inch ±1/4 then have a positive stop. Flap lock ad-
justment can be made at the two screws in slots on the flap lock in the wing. Without the cor-
rect travel, the lock may not be able to swing free of the stop, which will cause the flaps to not
be able to be extended.
If flap cable tension is too tight or if it does not incorporate the flap lock mechanism, the
flap will drop over three (3) inches with light downward pressure. On models that do not in-
corporate the flap lock mechanism, a limit cable is installed at the inboard flap hinge, which
should be adjusted so that the flaps will not hit the rear windows. The cable must allow the
correct full flap angle (35° or *40° depending on the ratchet).
The bellcrank in each wing should rest against the cork pad glued to the rear wing spar
while in the retracted position. While the bellcrank is in the retracted position the flaps should
be set to 0° plus or minus one half (1/2) degree using the push rod located on each flap.
To adjust the balance cable turnbuckle located above the headliner above the aileron
turnbuckles, slowly extend the flaps while watching both left and right flaps. They should ini-
tially extend evenly and together. If on the initial extension, the flaps do not extend symmetri-
cally, tighten or loosen the turnbuckle as required.
After the above adjustments have been made you should check for proper deflections: 15°
first notch and 35° second notch ± 3° or *20° first notch and *40° second notch ± 3°.
20° and 40° Flap Setting is applicable if Maule Service Letter No. 48 is complied with.
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