SA268GL

Installation of wheel and ski adapters on Models 150F, G, H, J, K, L, M, 152 aircraft modified per STCSA175GL. Installation of adapter extension-landing gear, landing-gear extended-assembly of Models 150, 150A - H, J - M, A150K - A150M, 152, A152 aircraft modified per STC SA175GL. Held by Williams Robert Or Barbara, which holds 21 approved modifications in all. Last revised April 13, 1982. System: landing gear.

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; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; 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: 150F, 150E, 150D, 150B, 150J, 150A, 150, 150C, 152, A150M, 150G, 150M, 150H, A150L, 150L, 150K, A152, A150K
Type certificates: 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19
On this site: Cessna 150 7,995 registered
Cessna 152 1,637 registered
Cessna A150 232 registered
Cessna A152 48 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.