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

SA4-394

Installation of George M. Adams DGA-2000 wheels and Bodell Mfg Model BMI-252 brakes. Held by Skybound Manufacturing INC., which holds 19 approved modifications in all. Last revised June 25, 2003. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; Miscellaneous
Models
172A, 172, 172B, 172C, 172D, 172E, 182, 182A, 182B, 182C, 182D, 182E, 182G, 182F, 305B (Military T0-1D; 0-1D; 0-1F), 150A, 150C, 150D, 150B, 150, 210, 210A, 210B, 210C, 210D, 210-5 (205), 210-5A (205A), 140A, 180C, 180, 180B, 180D, 180E, 180F, 180G, 180A, 120, 140, 170, 170A, 170B, Miscellaneous
Type certificates
3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A14, 3A19, 3A19, 3A19, 3A19, 3A19, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 5A2, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, A-768, A-768, A-799, A-799, A-799, Miscellaneous
On this site
Cessna Ector 305 20 registered
Cessna 120 661 registered
Cessna 140 1,838 registered
Cessna 150 7,994 registered
Cessna 170 2,085 registered
Cessna 172 Skyhawk 20,670 registered
Cessna 180 Skywagon 2,606 registered
Cessna 182 Skylane 11,828 registered
Cessna 210 Centurion 1,526 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 7, 2026.