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

Shell Development CO

Holds 2 approved modifications. FAA spelling: Shell Development Co.

Approved modifications 2 · newest first

1992-10-22SE8465SW · Installation and usage of Aeroshell15W50 oil. · R-985 Series, R-1340 Series, R-1830 Series
1991-03-11SE8023SW · Installation and usage of AEROSHELL · IO-360 Series, IVO-360-A1A, AIO-360 Series

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