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Modifying the battery box lid to eliminate the possibility of "shorting" the battery terminal wing nuts.
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Correcting interference between the gas gauge tank unit float arm and the cast aluminum adapter in which the gas gauge tank unit is mounted.
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Immediate changes necessary in the bungee installation.
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In order to supply an alternate source of breather air to eliminate the possibility of pressurizing the engine case in the event that icing occurs at the breather tube end, a slot has been added to the lower portion of the breather tube.
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How to correct air leaks, which permit entrance of engine fumes into the cockpit, in the area of the fuselage right main landing gear fittings.
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To ensure that the rubber strips on the top of the rear engine baffles remain in place, it is necessary to staple them in six places.
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The battery box drain tube on the affected airplanes may in some cases be insufficiently long to protrude 1/2 inch below the belly skin of the airplane.
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Recommendations to prevent motor mount failures.
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It has been found that the "Cub" becomes quite noticeably nose heavy with full load and power off condition when the space between the wing and the center section is left uncovered.
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Optional installation of Auxiliary Oil Radiator Kit which will reduce the oil temperature about 20° for engines that are running excessive oil temperatures.