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

SA16NW

Installation of Continental O-470-J Engine and McCauley 90M-8 Propeller blades and 2A36C1 Hub. Held by Strever, Carl W.. Last revised November 7, 1972. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Regal Air Inc.
Models
305A
Type certificate
5A5
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.