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

SA4375WP

Installation of saddle blocks as replacement for landing gear attachment U-bolts (P/N 1-9805). Held by Able Air Corporation, which holds 2 approved modifications in all. Last revised October 29, 1981. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.
Models
7ECA, 7KCAB, 7GCAA, 7GCBC
Type certificates
A-759, A-759, A-759, A-759
On this site
American Champion Aircraft 7 Citabria and Champ 429 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.