The U.S. aircraft register, updated daily
Parts

Hpt First

No failure report names the hpt first. 2 FAA approvals let 1 company make a replacement hpt first, Precision Component Technologies 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 hpt first and sell it as an approved part for the models named. These are the companies holding such approvals for a hpt first:

MakerPartReplacesFitsGrantedStatus
Precision Component TechnologiesHPT First Stage Vane Assembly PCT1B77011B7701Pratt & Whitney 2037, 2037(M), 20402011-12-08current
Precision Component TechnologiesHPT First Stage Seal Assembly PCT1A88891A8889Pratt & Whitney 2037 and 2040.2011-12-08current

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.