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

SA4139NM

Installation of a Continental O-200-A engine, Cessna 150 baffle system, univair type F19 engine mount, Cessna 150 engine exhaust stack assembly, two 6 gallon wing fuel tanks and associated systems, 60 AMP alternator (Cessna 150 type) and a Hendrickson Model H70A48 wood propeller. Held by Miltner Harry, which holds 3 approved modifications in all. Last revised February 24, 1988. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Taylorcraft 2000 LLC
Models
BC12-D
Type certificate
A-696
On this site
Taylorcraft BC12 BC-12D 1,225 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.