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

ST01141SE

Group aircraft approval for Reduced Vertical Separation Minimum (RVSM). Held by Aeromech Incorporated, which holds 171 approved modifications in all. Last revised January 16, 2009. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Israel Aircraft Industries Ltd.
Models
1125 Westwind Astra
Type certificate
A16NM
On this site
Israel Aircraft Industries 1125 36 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.