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

SA00165WI

Installation of replacement wing tips. Held by Flight Enhancements, which holds 12 approved modifications in all. Last revised June 10, 1994. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.; Textron Aviation Inc.
Models
177B, 177RG
Type certificates
A13CE, A20CE
On this site
Cessna 177 Cardinal 2,158 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.