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

SA543SW

Installation of Alcor turbocharger on aircraft modified to Continental IO-470-H engines. Held by Alcor LLC, which holds 13 approved modifications in all. Last revised May 27, 2025. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.
Models
Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G
Type certificates
A-782, A-782, A-782, A-782, A-782, A-782
On this site
Navion NAVION D 5 registered
Navion NAVION F 6 registered
Navion NAVION G 61 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 5, 2026.