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

Microturbo

Named as the FAA publishes it on its approvals.

Approved to make 3 classes of equipment. FAA spelling: Microturbo.

Equipment approvals technical standard order authorisations

2021-04-08TSO-C77a · Gas Turbine Auxiliary Power Units · * · engine
2014-05-23TSO-C77b · GAS TURBINE AUXILIARY POWER UNITS · e-APU60 model Auxiliary Power Unit · engine
TSO-C77 · Gas Turbine Auxiliary Power Units · *, *, * · engine

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.