09/21/2021Univair
As a precautionary measure, the Civil Aeronautics Authority requests that the bug screen installed inside the carburetor air scoop be removed.
09/21/2021Univair
Information about certain features in the electrical wiring system of the Piper J-4 aircraft which the Civil Aviation Authority feels should be corrected.
04/11/2022Univair
Failure of strainer/carburetor attaching fittings which may be attributed metal fatigue.
09/21/2021Univair
Remedial measures for preventing muffler and engine failures.
04/11/2022Univair
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.
09/21/2021Univair
Reports of the listed model airplanes that the engine will not operate properly with low fuel in the 7 gallon header tank.
09/21/2021Univair
Wing aileron bellcrank brackets failing due to parking or staking out the airplane with the tail into the wind without securing the controls.
04/12/2022Univair
A noticeable aging of the spar finish occurs in listed airplane models that are continually exposed to adverse atmospheric conditions.
09/21/2021Univair
Instructions for repairs of minor cracks, pin holes and failed spot welds in the stainless steel wing tanks.
04/12/2022Univair
Testing for secure attachment of flexible hose end fittings.
04/11/2022Univair
Inspecting for cracks at or near the weld beads at the attachment of the muffler outer shell to the end plates.
09/21/2021Univair
Correction to the rigging procedure found on Page 3, Section 2, of the Piper J-4 Service Manual.
09/21/2021Univair
Describes the method to be used in reinforcing the nose structure of the ribs.
04/11/2022Univair
Installing a spring on the fuel shut-off to assist opening of the valve.
04/12/2022Univair
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.
04/11/2022Univair
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.
09/21/2021Univair
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.
04/13/2022Univair
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.
09/16/2021Univair
Compromised structural integrity of the fuselage due to excessive rust and corrosion between steel tubing and preformed sheet steel material.
04/12/2022Univair
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.