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

SA4073NM

MSN 25-014 Installation of emergency medical system. Held by Air Methods Corporation, which holds 138 approved modifications in all. Last revised March 14, 1990. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Learjet Inc.
Models
25
Type certificate
A10CE
On this site
Learjet 25 23 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 20, 2026.