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

SA04440CH

Installation of Hartzell propeller model 4C1-F650A1/76C04-0.6 or 4C1-F650A1/76C04B-0.6. Held by Hartzell Propeller INC, which holds 90 approved modifications in all. Last revised January 6, 2020. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Cirrus Design Corporation
Models
SR22T
Type certificate
A00009CH
On this site
Cirrus SR22 7,081 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.