The U.S. aircraft register, updated daily
Parts

Supplemental Manufacturing

No failure report names the supplemental manufacturing. 2 FAA approvals let 1 company make a replacement supplemental manufacturing, Advanced Flight Systems INC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a supplemental manufacturing and sell it as an approved part for the models named. These are the companies holding such approvals for a supplemental manufacturing:

For these models most: Agusta A109 (2), Agusta Spa A109 (2).

MakerPartReplacesFitsGrantedStatus
Advanced Flight Systems INCSupplemental Manufacturing Drawing List A 109 Freon Air... Manufacturing Dwg List A109STC Modification PartsAgusta A109A11, A109C1997-02-09current
Advanced Flight Systems INCSupplemental Manufacturing Drawing List A109 Freon Air... Manufacturing Dwg List A109STC Modification PartsAgusta A109A11, A109C1997-02-09current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.