Instructions for inspecting the battery box lid for proper clearance between the lid and the battery terminals.
Immediate inspection of clearance between the aileron cable and the master switch wires (from the master switch to the ammeter).
Modifying the battery box lid to eliminate the possibility of "shorting" the battery terminal wing nuts.
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.
Inspection to determine if there is interference between the inboard end of the front spar web and the aileron pulley attachment bolt in the area of the front wing hinge fitting.
Instructions for correcting an incorrectly installed pointer on the fuel selector valve.
Possibility of the fuel valve detent pins in a few valves were improperly centered, thus preventing positive indication of valve position.
Inspection of all PA-20 name plates and those bearing the model designation "PA-20A" be removed and returned to the Factory Service Department for replacement.
To preclude the possibility of in-flight fires, the following inspection and rework is necessary to eliminate combustible material and possible ignition sources from the area aft of the firewall underneath the forward cabin floor.