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

Cook William H

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Piper PA-18 Super Cub. FAA spelling: Cook William H.

Approved modifications 2 · newest first

Piper PA-18 Super Cub 2
1988-03-17SA4160NM · Modification to delete EDO P/N 088A2119 ventral fin assembly. · PA-18-125 (Army L-21A)
1972-06-30SA2561WE · Installation of modifications · PA-18-125 (Army L-21A)

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.