The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA715AL

Installation of Schneider Model SWS-4000 main wheel skis and Schneider Model SWS-1000 tail wheel skis. Held by Schneider Richard J, which holds 33 approved modifications in all. Last revised March 9, 1982. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
Models
PA-18 Series, PA-19 Series
Type certificates
1A2, 1A2
On this site
Piper/Cub Crafters PA-18 46 registered
Piper PA-19 15 registered
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 5, 2026.