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

SA00942AT

Installation of Vernier propeller control cable with ground adjustable friction lock. Held by Mod Works INC, which holds 34 approved modifications in all. Last revised February 24, 1999. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation
Models
M20K, M20J, M20C, M20D, M20E, M20G, M20F
Type certificates
2A3, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3
On this site
Mooney M-20 6,247 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.