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Reported cases of failure of a tail brace wire (10074-02 or 10074-03) on the above listed airplanes.
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Checking fuel selector valve for ease of rotation and instructions for lubricating.
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A recent survey of PA-20 and PA-22 aircraft has revealed that a certain number of these airplanes are operating with the strainer to carburetor flexible fuel line in a deteriorated condition.
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Adding strips of felt to the gas tank cover to improve the clearance between the cover reinforcements and the tank.
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Material list and instructions to reinforce the area where the fabric attaches to the fuselage under the windshield top and/or directly over the rear edge of the windshield top attachment channel.
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Information on replacing an existing diaphragm suspected to be defective in master brake cylinders installed in listed Piper aircraft models.
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Actual labor breakdown, in hours, of factory time required to cover and finish 100 each of the Piper PA-18, PA-18A and PA-22 models.
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Acceptable handling methods for returning malfunctioning or warrantied instruments to Alon, Inc.
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To prevent excessive wear of the primer line, resulting in fuel leakage and possible cabin fire, it is recommended that primer lines be clamped and/or re-routed per the sketch included with this letter.
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Table showing the type of brake fluid used in airplanes manufactured by the Piper Aircraft Corporation.