As a precautionary measure, the Civil Aeronautics Authority requests that the bug screen installed inside the carburetor air scoop be removed.
Information about certain features in the electrical wiring system of the Piper J-4 aircraft which the Civil Aviation Authority feels should be corrected.
Failure of strainer/carburetor attaching fittings which may be attributed metal fatigue.
Remedial measures for preventing muffler and engine failures.
Reported failures of the ribstitching both in the wing and control surface covering which may result in the fabric being torn from the structure while in flight.
Reports of the listed model airplanes that the engine will not operate properly with low fuel in the 7 gallon header tank.
Wing aileron bellcrank brackets failing due to parking or staking out the airplane with the tail into the wind without securing the controls.
A noticeable aging of the spar finish occurs in listed airplane models that are continually exposed to adverse atmospheric conditions.
Instructions for repairs of minor cracks, pin holes and failed spot welds in the stainless steel wing tanks.
Testing for secure attachment of flexible hose end fittings.
Inspecting for cracks at or near the weld beads at the attachment of the muffler outer shell to the end plates.
Correction to the rigging procedure found on Page 3, Section 2, of the Piper J-4 Service Manual.
Describes the method to be used in reinforcing the nose structure of the ribs.
Installing a spring on the fuel shut-off to assist opening of the valve.
Due to a number of reported failures of single strand .032" safety wire used on control system turnbuckles, it is considered necessary to replace the safety wire with single strand .040" brass or copper wire.
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.
How to fix difficulties with the fabric where it attaches to the fuselage under the windshield top and/or directly over the rear edge of the windshield top attachment channel.
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.
Compromised structural integrity of the fuselage due to excessive rust and corrosion between steel tubing and preformed sheet steel material.
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.