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

SA2665NM

Removal of existing inverted oil system and installation of Christen Industries Model 801 Series Inverted Oil System,. Held by Roy G. Kogle. Last revised October 4, 1984. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Cessna Aircraft Company
Models
A150K
Type certificate
3A19
On this site
Cessna A150 232 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.