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

SA820CE

Install Aero Model M1500, M1800 or M2000 main skis. Held by Aero Ski Manufacturing CO INC, which holds 19 approved modifications in all. Last revised December 12, 2003. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
Models
J3C-65, J3C-40, J3C-50, PA-11
Type certificates
A-691, A-691, A-691, A-691
On this site
Piper J-3 Cub 3,805 registered
Piper PA-11 Cub Special 443 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 21, 2026.