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

National Aircraft Service INC. (Nasi)

Holds 1 approved modification, most of them for the Sikorsky S-58. FAA spelling: National Aircraft Service Inc. (NASI).

Approved modifications 1 · newest first

Sikorsky S-58 1Sikorsky S-61 1
2020-11-03SR04483CH · Installation of NASI NREM18M Air Conditioning Module · S-58A, S-58B, S-58BT

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.