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

SA01580NY

Replace existing front fuselage strut assemblies with Amtech Aeronautical Ltd strut assembly - front fuselage 302811-1 (LHS) and 302811-2 (RHS). Held by Acorn Welding LTD. (Canada), which holds 6 approved modifications in all. Last revised January 31, 2003. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
de Havilland Inc. (Canada); de Havilland Inc. (Canada); de Havilland Inc. (Canada)
Models
DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III
Type certificates
A-806, A-806, A-806
On this site
Dehavilland DHC-2 255 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.