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

SA21NW

Installation of a 70 pound baggage compartment in either or both EDO 89-2000, 89A-2000 or 689-2130 floats. Held by Kenmore Air Harbor INC, which holds 34 approved modifications in all. Last revised April 5, 2019. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
American Champion Aircraft Corp.; American Champion Aircraft Corp.; Arctic Aircraft Company Inc.; Cessna Aircraft Company; Cessna Aircraft Company; FS 2003 Corp.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Rogers Burl A.; Sky International Inc.; Sky International Inc.; Sky International Inc.
Models
7GCBC, 8GCBC, S-1B2, 172, 170, PA-12S, PA-18S, PA-20S, PA-22S-135, PA-22S-150, PA-22S-160, PA-28S-160, PA-28S-180, 15AC, A-1, A-1A, A-1B
Type certificates
A-759, A21CE, A-754, 3A12, A-799, A-780, 1A2, 1A4, 1A6, 1A6, 1A6, 2A13, 2A13, A-802, A22NM, A22NM, A22NM
On this site
American Blimp Corp A-1 5 registered
American Champion Aircraft 7 Citabria and Champ 429 registered
American Champion Aircraft 8 Decathlon and Scout 668 registered
Arctic Aircraft Co Inc S-1 15 registered
Cessna 170 2,084 registered
Cessna 172 Skyhawk 20,669 registered
Piper PA-12 Super Cruiser 1,247 registered
Piper PA-18 Super Cub 3,621 registered
Piper PA-20 Pacer 323 registered
Piper PA-22 Tri-Pacer and Colt 2,940 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,619 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.