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

SA3247NM

Installation of an air to air intercooler in the engine induction system downstream of the turbocharger. (TU206G S/N U20603522 thru U20606921 and up). Held by Western Skyways Aircraft Modifications INC., which holds 12 approved modifications in all. Last revised February 20, 2024. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
Models
TU206A, TU206D, TU206E, TU206F, TU206G
Type certificates
A4CE, A4CE, A4CE, A4CE, A4CE
On this site
Cessna TU206 343 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.