The U.S. aircraft register, updated daily
Parts

Ventilator

No failure report names the ventilator. 6 FAA approvals let 4 companies make a replacement ventilator, Tulsa Heliparts INC holding the most (2).

Approved replacement parts 6 parts manufacturer approvals

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

For these models most: Bell 47 (2).

MakerPartReplacesFitsGrantedStatus
Hartzell Engine Technologies LLCVentilator 1016Modification PartLycoming Continental Franklin All FAA Certificated Lycoming,...2013-02-24current
Kelly Aerospace Energy Systems LLCVentilator 1016Modification PartLycoming All FAA Certificated Lycoming,...2012-11-29current
Hartzell Engine Technologies LLCVentilator 1016Modification PartLycoming Continental Franklin All FAA Certificated Lycoming,...2010-10-21current
Tulsa Heliparts INCVentilator Assembly 90-380-212-3, -13Bell 47-380-212-3 -13Bell 47G-2, 47G-2A, 47G-2A-11996-01-10current
Troll Avionics INCVentilator FN200PZL FN200Panstwowe Zaklady PZL-Koliber 150A1994-07-06current
Tulsa Heliparts INCVentilator Assembly 90-380-212-3, -13Bell 47-380-212-3, -13Bell 47G2, 47G2A, 47G2A11993-01-24current

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.