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

SA01606SE

Installation of an electrical/electronics system including contemporary electronic appliances, control devices and interface wiring in accordance with Teufel Nursery, Inc. MDL G21G-00006-01, Revision -1, dated August 12, 2005 or later approved MDL on Aero Planes, LLC, Model G-21G, s/n 1201. Held by Teufel Nursery INC, which holds 4 approved modifications in all. Last revised October 7, 2005. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Atlantic Coast Seaplanes LLC
Models
G-21G
Type certificate
4A24
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.