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

SA5228NM

Installation of two wing strut mounted telemetry antennas. Held by Usda, which holds 11 approved modifications in all. Last revised February 17, 1994. 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
Models
172P, 172N, 182P, 182L, 182N, 182Q, 182M, 182G, 182C, 182B, 182A, 182F, 182H, 182J, 182K, 182D, 182E, 172RG, 180E, 180H, 180G, 180F, 180J, 180K, 180A, 180B, 180C, 180D
Type certificates
3A12, 3A12, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A17, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6
On this site
Cessna 172 Skyhawk 20,675 registered
Cessna 180 Skywagon 2,605 registered
Cessna 182 Skylane 11,832 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.