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

ST01651CH

Install air ambulance conversion. Held by Spectrum Aeromed LLC DBA Spectrum Aeromed, which holds 56 approved modifications in all. Last revised September 15, 2023. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Learjet Inc.
Models
45
Type certificate
T00008WI
On this site
Learjet 45 433 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 7, 2026.