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Installation of oil shields on Airborne Mechanisms Dry Vacuum Pumps, Models 113A1 and 113A5, to prevent oil or cleaning solvents from entering the vent holes in the face of the mounting flange.
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Corrective measures to prevent failure of the exhaust system.
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It has been discovered, on an undetermined number of Stinson Model 108-1 airplanes that the model designation as stamped on the airplane nameplate is in error.
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A noticeable aging of the spar finish occurs in listed airplane models that are continually exposed to adverse atmospheric conditions.
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Installing tailspring attachment reinforcing units, part numbers 30882 and 30871, to prevent tailspring attachment failure.
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Outlines the repair of Univair STC'd Stamped Ribs in accordance with the original STC and FAA Advisory Circular AC 43.13-1B.
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Approximate list of materials required to cover and finish the various component assemblies of the listed piper planes.
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Incorporating a new style stop on the brake lever to prevent the brake lever from hitting the gas line.
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Changing the stabilizer adjustment cable fiber rub block to a pulley arrangement to prevent cable slippage and possible cable fraying.
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Specifications and performance data for Piper PA-20 "125" and "135" airplanes.