The U.S. aircraft register, updated daily
Who holds what · as the FAA records the name

Zee Systems INC.

Holds 2 approved modifications, most of them for the Air Tractor Inc AT-502. FAA spelling: ZEE Systems Inc..

Approved modifications 2 · newest first

Air Tractor Inc AT-502 2Air Tractor Inc AT-401 1Air Tractor Inc AT-402 1
2026-06-18SA09719AC · Installation electrostatic spray equipment and controls · AT-401, AT-401A, AT-401B
2012-02-14SA8121SW · Installation of freon air conditioner · AT-502, AT-502A, AT-502B

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.