Installation of the header tank kit to prevent possible malfunctioning of the engine due to insufficient fuel flow in prolonged glides or dives with less than five gallons of fuel in the main tank.
Replacing rubber stop discs with leather discs at the next periodic inspection.
Loose end fitting on the flexible fuel line connecting the fuel strainer to the carburetor.
Proper maintenance and inspection of front and rear seat backs to prevent failure due to deformations in seat frames.
Inspection to ascertain that the flattened tube end fitting at each end of the connector tube is riveted in place as shown in sketch.
These inspection notes are issued as a recommended check list to assist owners, operators, and maintenance personnel in keeping their Piper airplanes in an airworthy condition.
The weight and balance forms which were issued with all Model PA-11-90 airplanes, prior to serial number 11-993, are not correct in so far as loading and C. G. limits specified are concerned.
Failures of lift struts caused by abuse, failure to replace lift struts after ground accidents, and the use of damaged parts from scrapped airplanes as service replacement parts.
Replacing aluminum aileron hinge reinforcing bracket with one made of steel, part number 10931-02.
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.
A recent fuel tank collapse was attributed to inadequate venting, caused by obstruction of the cap vent holes installed per Piper Service Bulletin No. 522.
Installing an improved forward fuel header tank with thicker walls and welded seals, which provides greater resistance to impact rupture in the event of an accident.
Steps to preclude failure of the U12694 series throttle cables, which could cause loss of full travel of the throttle control.
Outlines the repair of Univair STC'd Stamped Ribs in accordance with the original STC and FAA Advisory Circular AC 43.13-1B.
Recommended modifications for winter operations of Piper J-3, PA-11 and PA-12 aircraft.
Inspecting the entire muffler assembly and tailpipe for cracks in PA-11 aircraft.
Adding strips of felt to the gas tank cover to improve the clearance between the cover reinforcements and the tank.
This letter is to advise all concerned that as of September 1st, 1962, the Piper Aircraft Corporation considers the following aircraft models obsolete inasmuch as they have been out of production for at least seven years.
This service release announces the field availability of a new current production Forward Fuel Header Tank which provides greater resistance to impact rupture in the event of an accident.