09/13/2021Univair
Failures, occurring as cracks in the center section belly skin at the rearmost rivet attachment in the center section belly skin outer stiffeners (415-13056 L/R), have been reported.
09/13/2021Univair
Interference of the baffle with the filter element within the carburetor filter assembly, resulting in a jamming of the throttle and a lack of proper carburetor heat control, has been reported.
09/13/2021Univair
Modification to increase the strength of the aileron balance weight bracket to beam attachment.
09/13/2021Univair
Electrolyte leaking from the battery box will cause corrosion of structural members of the aircraft and deterioration of the baggage compartment. This bulletin provides instructions for modifying the battery box.
09/13/2021Univair
Increasing the strength of the rudder at the control horn attachment.
09/13/2021Univair
Replacement of aluminum fittings between carburetor and gascolator with steel or brass fittings, verification of gascolator braces, and installation of new gascolator.
09/13/2021Univair
Partial or almost complete loss of rudder control of one or both rudders due to partial failure of the rudder horn attachments.
09/13/2021Univair
Procedure for dye penetrant inspection of control column tee for evidence of cracks.
09/13/2021Univair
Procedure for visual inspection of wing tip area for evidence of cracks.
09/13/2021Univair
Procedure for visual inspection of coating on fuel gauge cork floats and inner fuel tanks for deterioration.
09/13/2021Univair
Procedure for visual inspection of outer wing panel structure for evidence of corrosion.
09/13/2021Univair
Procedure for visual inspection of part number 40511 muffler.
09/13/2021Univair
Procedure for inspection of the wing center section to establish the condition of the center section structure.
09/13/2021Univair
Revisions of existing Ercoupe Service Memoranda 19 and 35.
09/14/2021Univair
Required visual or tactile examination of the wing tank fuel shut off valve and the main fuel shut off valve to insure that both valves are open prior to every flight.
09/14/2021Univair
Concern of dissimilar metal corrosion occurring where the steel elevator control horn attaches to the aluminum lateral stiffener located within the elevator assembly.
09/14/2021Univair
Undetected corrosion in the aileron pushrod tube may lead to failure of the tube, loss of control of the aileron and possible loss of control of the aircraft.
09/14/2021Univair
Visual inspection of the throttle cable and housing for fatigue and possible cracking.
09/08/2021Univair
Over-demonstrating the Ercoupe airplane (doing maximum performance maneuvers at minimum altitudes and at minimum speed) can lead to accidents.
09/08/2021Univair
The recurrence of muffler failures has necessitated redesign of the muffler to eliminate the possibility of carbon monoxide being introduced into the cabin.