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

SA823GL

Installation of ice shields manufactured by Field Aviation Co., Ltd., Calgary, Alta., Canada. Held by Field Aviation Company INC (Canada), which holds 8 approved modifications in all. Last revised November 16, 1984. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Short Brothers PLC
Models
SD3-60
Type certificate
A41EU
On this site
Short Bros SD3 41 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 21, 2026.