Piper PA-22

Reported cases of failure of a tail brace wire (10074-02 or 10074-03) on the above listed airplanes.

Reports that the front seat center safety belts are showing evidence of deterioration due to heat from the rear seat heater outlet.

The tail brace clevises and bushings on the aircraft indicated by the above serial numbers are to be replaced.

Modification of the cabin heat box plate to prevent interference with the movement of the safety belt attaching link.

Reports of the vacuum pump splined coupling on Airborne Mechanisms Vacuum Pumps Models 113A5 and 113A8 may fail prematurely as a result of over-curing.

Aircraft equipped with either a single or dual fuel quantity gauge installation must have the placard installed.

The flight manual supplement titled "Supplement No. 2 to aircraft flight manual dated October 23, 1952" concerning the installation of the optional auxiliary fuel tank on affected model aircraft may contain erroneous information.

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.

Checking fuel selector valve for ease of rotation and instructions for lubricating.

Reports of collapsed wing mounted fuel tanks due to inadequate venting of the tank.

Revises compliance time, purpose, and instructions for inspection and/or replacement of wing lift strut assembly. Also announces the availability of new sealed lift struts.

Installation of a placard on the Pilot's instrument panel warning against using improper procedures in applying the parking brake.

Compromised structural integrity of the fuselage due to excessive rust and corrosion between steel tubing and preformed sheet steel material.

Replacing the shimmy dampener currently installed in the affected model aircraft with new shimmy dampener, part number 13086-00, and instructions for continuing maintenance at regular intervals.

A condition exists where the flexible coupling connecting the vacuum pump may fail prematurely, causing a loss of vacuum/pressure with the resultant loss of vacuum/pressure instruments and other appliances.

The possibility exists where the airplane's gyro vacuum/pressure system may become contaminated by loose particles originating from the air filter element.

Outlines the repair of Univair STC'd Stamped Ribs in accordance with the original STC and FAA Advisory Circular AC 43.13-1B.

Inspection of the aluminum fuel lines forward of the fuel valve.

Inquiries relative to the new "Duraclad" finish on our 1951 Model airplanes.

The installation of a spacer plate will in most cases completely eliminate any thumping which the nose wheel now makes at full extension.