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

SA3660NM

Installation of American Aviation intercooled engines. (A56TC Baron). Held by American Aviation INC, which holds 20 approved modifications in all. Last revised November 1, 1998. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Hawker Beechcraft Corporation; Hawker Beechcraft Corporation
Models
56TC, A56TC
Type certificates
3A16, 3A16
On this site
Beechcraft 56 37 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 20, 2026.