Concerns about some of the operational conditions which exist with the PA-18A agricultural airplane.
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.
Discussion concerning the useful life of the eight rubber engine support bushings, Lycoming part number 60883.
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.
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.
Reinforcing the bottom longeron on PA-18A airplanes to prevent bends caused by certain load conditions or maneuver types.
The RPM restriction placard is no longer necessary and can be removed from above mentioned airplanes.
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.
Availability of a modification kit to incorporate the latest type carburetor air filter system on the aircraft models listed above.
Proper maintenance and inspection procedures of exhaust systems and heat exchangers for the listed models.
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.
Instructions for applying the recommended fuel valve lubricant in the listed Piper models.
The following listing denotes the location of the Cylinder Head Temperature Probe for Piper aircraft.
Contains the Ceconite Application, Maintenance and Repair Procedures for Piper PA-18 and PA-25 models.
Instructions for replacing the old style Piper Automatic Location Transmitters with newer models.
Materials and instructions for replacing overvoltage relay and starter power relay in the PA-18 electrical system.
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.
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.
Table showing the type of brake fluid used in airplanes manufactured by the Piper Aircraft Corporation.
Shock cord application chart for listed Piper models.