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

SA2053WE

An adjustable lateral trim capability through spring bungee control of aileron per Strato Engineering Company. Held by Consulting Aerospace Engineers INC, which holds 5 approved modifications in all. Last revised May 23, 1973. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models
150C, 150B, 150A, 150E, 150D, 150
Type certificates
3A19, 3A19, 3A19, 3A19, 3A19, 3A19
On this site
Cessna 150 7,994 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.