The U.S. aircraft register, updated daily
Parts

Cabin Vent

No failure report names the cabin vent. 7 FAA approvals let 4 companies make a replacement cabin vent, Aerometals holding the most (3).

Approved replacement parts 7 parts manufacturer approvals

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

For these models most: Md Helicopters Llc 369 (3), Md Helicopters Inc 600 (3), Hughes 369 500 series helicopters (3), Md Helicopters Inc 369 (2), Sikorsky S-92 (1), Md Helicopters Inc 500 (1).

MakerPartReplacesFitsGrantedStatus
Custom Aircraft InteriorsCabin Vent Duct CAI-8654369H8065-7MD 369C, D, E2022-12-08current
Custom Aircraft InteriorsCabin Vent Duct CAI-8654369H8065-7MDHC/MD 369E, FF, 55N2022-12-08current
AerometalsCabin Vent Valve Housing Assy MDL-AMC-011Modification PartMDHI Hughes) (369HM, 369HS, 369HE2015-01-21current
Ametek RotronCabin Vent Fan 035908500035908500Sikorsky S92A2007-04-16current
AerometalsCabin Vent Valve Housing assembly AM369H8064Modification PartMD Helicopters, Inc. MDHI) (369HM, 369HS, 369HE2005-03-09current
AerometalsCabin Vent Valve Housing Assembly AM369H8064-21Modification PartMD Helicopters, Inc. MDHI) (369HM, 369HS, 369HE2003-02-24current
Custom Aircraft InteriorsCabin Vent Duct CAI-8654369H8065-7MD Helicopters, Inc. MDHI) (369E, FF, 55N2003-01-01current

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.