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

SA3-339

Installation of Wipaire Skis Inc. Model C-3000 (Aircraft Skis) (FluiDyne) (Federal) Main Wheel (either manually or hydraulically actuated) ski having a cross-wind wheel utilizing a 6.00-6 tire. Held by F.Atlee Dodge Aircraft Services, which holds 45 approved modifications in all. Last revised February 9, 2023. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
Models
170, 170A, 170B
Type certificates
A-799, A-799, A-799
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.