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

SA00443SE

Installation of vortex generators on wings, installation of fuselage strakes, and removal of stall strips. Held by Micro Aerodynamics INC, which holds 77 approved modifications in all. Last revised May 28, 1997. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
Polskie Zaklady Lotnieze Spolka zo.o; Polskie Zaklady Lotnieze Spolka zo.o; Polskie Zaklady Lotnieze Spolka zo.o
Models
PZL M18A, PZL M18, PZL M18B
Type certificates
A47EU, A47EU, A47EU
On this site
Wsk-Pzl Meilec PZL M18B 8 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 7, 2026.