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

SA01801SE

Installation of a Kawak Aviation Technologies auxiliary system, and optional ancillary equipment. Held by Air Repair INC., which holds 4 approved modifications in all. Last revised December 15, 2022. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.; Thrush Aircraft Inc.
Models
AT-502, AT-502A, AT-502B, AT-602, AT-802, AT-802A, S2R-G1, S2R-G10, S2R-G5, S2R-G6, S2R-H80, S2R-T11, S2R-T15, S2R-T34, S2R-T45, S2R-T65, S2R-T660, S2RHG-T34, S2RHG-T65
Type certificates
A17SW, A17SW, A17SW, A19SW, A19SW, A19SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW, A4SW
On this site
Air Tractor Inc AT-502 502 registered
Air Tractor Inc AT-602 246 registered
Air Tractor Inc AT-802 683 registered
Ayres Corporation S-2 244 registered
Thrush Aircraft Inc S-2 102 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.