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

SA1243CE

Installation of Cleveland wheels and brakes and optional wheel fenders per Flanagan Aircraft Co. Drawing List No.5 stamped "FAA Approved" with a date of July 7, 1976, for PA-18, Serial Number 18-8118; May 17, 1977, for all other PA-18 airplanes; and September 29, 1977, for installation of optional 24 x 10 x 6 Muskeg King tires. Held by Cub Crafters INC, which holds 62 approved modifications in all. Last revised January 26, 2012. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
Piper Aircraft Inc.; Piper Aircraft Inc.
Models
PA-18, PA-18A
Type certificates
1A2, 1A2
On this site
Piper PA-18 Super Cub 3,620 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.