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

SA1058GL

Installation of on-board engine analyzer system. Held by Masten Products INC, which holds 21 approved modifications in all. Last revised July 12, 1990. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models
210E, T210H, 210H, 210-5 (205), 210L, T210G, 210G, 210J, 210F, T210K, 210D, 210C, 210B, 210A, 210, T210F, T210N, 210-5A (205A), 210N, T210M, 210R, 210M, T210R, T210J, 210K, T210L
Type certificates
3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21
On this site
Cessna 210 Centurion 1,528 registered
Cessna T210 Turbo Centurion 1,283 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 22, 2026.