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

ST02234NY

Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This approval is limited to only the installation made in airplane Serial Number 133 only. Installation of Flap Preset Control System. Held by Insight Instrument Corporation (Canada), which holds 8 approved modifications in all. Last revised February 8, 2006. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
Learjet Inc.
Models
35A (C-21A)
Type certificate
A10CE
On this site
Learjet 35 161 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 8, 2026.