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

SA00804CH

Installation of Wipaire Model 2100 amphibian floats. Held by Wipaire INC, which holds 64 approved modifications in all. Last revised January 3, 2000. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company
Models
170B, 170A
Type certificates
A-799, A-799
On this site
Cessna 170 2,084 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 5, 2026.