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

SH406AL

Installation of L2700 SA 318 skis. Held by Airglas INC., which holds 51 approved modifications in all. Last revised August 14, 2012. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Airbus Helicopters
Models
SA 318C-Alouette Astazou
Type certificate
7H1
On this site
Sud Aviation SA 318 6 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 5, 2026.