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

SA268SW

Installation of Mitchell automatic pilot model AK116. Held by Mitchell Industries, INC, which holds 31 approved modifications in all. Last revised August 7, 1963. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
American Navion Society Ltd.; American Navion Society Ltd.; Sierra Hotel Aero Inc.; 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
D-16, D-16A, Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G
Type certificates
2A1, 2A1, A-782, A-782, A-782, A-782, A-782, A-782, A-782
On this site
Navion NAVION B 42 registered
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 20, 2026.