Correcting a condition that could cause loss of security of one or more screws which attach the aileron and flap hinge brackets.
Tightening engine mounting bolts to obtain a torque of (40) inch pounds.
Servicing instructions for the carburetor air filter with paper cartridge.
Misalignment of the oil radiator lines on the Lycoming 0-290-D2 135 horsepower engines at the point where they pass through the rear engine baffle.
Correction to the fuel grade specification in flight manuals and fuel tank placards for the Lycoming O-290-D2 engines.
Possibility of the fuel valve detent pins in a few valves were improperly centered, thus preventing positive indication of valve position.
A recent design change to the fuel tank caps has created a possible hazard to the venting system and it is therefore requested that the caps be reworked in the following manner.
Mandatory replacement of 1/8 - 7 x 19 flexible stainless steel control cables to prevent cracked nicopress sleeves.
Inspecting for weld separation where the rudder pedal cable attachment fitting is welded to the rudder pedal.
Reports of the vacuum pump splined coupling on Airborne Mechanisms Vacuum Pumps Models 113A5 and 113A8 may fail prematurely as a result of over-curing.
Instructions for compliance with Marvel-Schebler Division Bulletin No. A1-69.
Instructions for an inspection of the vacuum pump adapter drive assembly.
Checking fuel selector valve for ease of rotation and instructions for lubricating.
Instructions to inspect the fuel tank filler caps for presence of a vent hole in the cap dome.
Instructions and material to reroute the rudder control cables to prevent cable contact with the adjacent fuselage frame tubes.
Reports of collapsed wing mounted fuel tanks due to inadequate venting of the tank.
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.
Instructions for the installation of an additional support plate to strengthen the attachment mechanism.
Exhaust muffler inspection and modification, Piper Part Number 12433-00, 12433-14, 12232-00.
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.