The U.S. aircraft register, updated daily
Parts

Quiet Turbofan

No failure report names the quiet turbofan. 5 FAA approvals let 1 company make a replacement quiet turbofan, Raisbeck Commercial Air Group holding the most (5).

Approved replacement parts 5 parts manufacturer approvals

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

For these models most: Dehavilland DHC-6 (1), Beechcraft E-90 King Air E90 (1), Beechcraft C90 King Air C90 (1), Beechcraft 65 (1).

MakerPartReplacesFitsGrantedStatus
Raisbeck Commercial Air GroupQuiet Turbofan Propellers 91-2500Modification PartBeech Raytheon) (100/A100 Series1995-12-04current
Raisbeck Commercial Air GroupQuiet Turbofan Propellers All Parts Listed On...Modification PartBeech Raytheon) (200 Series1995-12-04current
Raisbeck Commercial Air GroupQuiet Turbofan Propeller All Parts Listed On...Modification PartdeHavilland DHC-6-3001995-12-04current
Raisbeck Commercial Air GroupQuiet Turbofan Propellers All Parts Listed On...Modification PartBeech Raytheon) (B90, C90, C90A1995-12-04current
Raisbeck Commercial Air GroupQuiet Turbofan Propeller All Parts Listed On...Modification PartBeech Raytheon) (F901995-12-04current

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.