09/29/2021Univair
Concerns about some of the operational conditions which exist with the PA-18A agricultural airplane.
09/29/2021Univair
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.
04/12/2022Univair
Discussion concerning the useful life of the eight rubber engine support bushings, Lycoming part number 60883.
09/29/2021Univair
The new Fuel Selector Valve, part number 11383-04, should be used for all service replacements and all new installations on Piper PA-18, PA-20 and PA-22 airplanes equipped with two wing fuel tanks.
09/29/2021Univair
Incorporating a new air filter installation which takes carburetor air from the top of the engine cowl instead of the bottom, thereby reducing the amount of sand and dirt that can enter the engine.
09/29/2021Univair
Reinforcing the bottom longeron on PA-18A airplanes to prevent bends caused by certain load conditions or maneuver types.
09/29/2021Univair
The RPM restriction placard is no longer necessary and can be removed from above mentioned airplanes.
09/29/2021Univair
To facilitate the inspection of Piper airplanes in the field, the Service Department has made up 100, 500 and 1000 hour inspection forms for Piper PA-18, PA-18A, PA-22, PA-23 and PA-24 models.
09/29/2021Univair
Availability of a modification kit to incorporate the latest type carburetor air filter system on the aircraft models listed above.
09/29/2021Univair
Proper maintenance and inspection procedures of exhaust systems and heat exchangers for the listed models.
09/29/2021Univair
Per Lycoming Division of Avco Corporation, it is permissible to use a torque value of 40 inch pounds to provide adequate tightness to maintain proper engine support in lieu of the linear dimension as previously specified.
09/29/2021Univair
Instructions for applying the recommended fuel valve lubricant in the listed Piper models.
09/29/2021Univair
The following listing denotes the location of the Cylinder Head Temperature Probe for Piper aircraft.
09/29/2021Univair
Contains the Ceconite Application, Maintenance and Repair Procedures for Piper PA-18 and PA-25 models.
09/29/2021Univair
Instructions for replacing the old style Piper Automatic Location Transmitters with newer models.
09/29/2021Univair
Materials and instructions for replacing overvoltage relay and starter power relay in the PA-18 electrical system.
09/29/2021Univair
An improperly maintained three-position fuel selector valve could become difficult to rotate; this could result in damage to the selector lever mechanism and/or inability to switch tanks.
04/12/2022Univair
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.
04/13/2022Univair
Table showing the type of brake fluid used in airplanes manufactured by the Piper Aircraft Corporation.
04/13/2022Univair
Shock cord application chart for listed Piper models.