Piper PA-22

SM-25 Piper PA-20/PA-22 Approximate Materials to Recover

04/12/2022Univair
Approximate amount of materials required to recover PA-20 and PA-22 models using raw fabric and cellulose acetate butyrate dope.

SM-28 Piper Miscellaneous FAA Field Approvals

04/13/2022Univair
The following installations have been FAA approved in the field. The party securing the approval is also listed.

SM-35 Piper PA-20/PA-22 Increase in Gross Weight

04/12/2022Univair
Increase in gross weight 1800 to 1950 pounds (Lycoming 0-290-d engine) (125 hp only).

SM-60 Piper PA-22 Specifications and Performance

09/30/2021Univair
Specifications and performance data for Piper PA-22 "125" and "135" airplanes.

SM-69 Piper Flight Approval for PA-22 with Rear Door Removed

09/30/2021Univair
An approval has been obtained for operating the PA-22 Tri-Pacer with the rear door removed (parachute jumping, photography, etc.).

SM-73 Piper PA-22 Nose Wheel Oleo Boot Assembly

09/30/2021Univair
Installation of this boot will reduce the possibility of moisture accumulating between the oleo assembly and the oleo housing.

VSP-62 Piper Inspection of Impulse Coupling Cam Assemblies

04/13/2022Univair
Addresses a potential for impulse coupling failure, which can result in total loss of engine power.

VSP-100 Piper Defective Diagrams in Master Cylinder

04/13/2022Univair
Information on replacing an existing diaphragm suspected to be defective in master brake cylinders installed in listed Piper aircraft models.