The U.S. aircraft register, updated daily
Parts

Jt Oil

No failure report names the jt oil. 5 FAA approvals let 2 companies make a replacement jt oil, Ptm International INC holding the most (3).

Approved replacement parts 5 parts manufacturer approvals

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

MakerPartReplacesFitsGrantedStatus
Jet Avion Corporation A Heico Aerospace CompanyJT9D Oil Tank Cap Safety Adapter Assembly PT020001Modification PartPratt & Whitney JT9D-7, -7A, -7F2006-11-20current
Jet Avion Corporation A Heico Aerospace CompanyJT9D Oil Tank Cap Safety Adapter Assembly PT020001A01Modification PartPratt & Whitney JT9D-7, -7A, -7F2006-11-20current
Ptm International INCJT9D Oil Tank Cap Safety Adapter Assembly PT020001A01Modification partPratt & Whitney JT9D-7, -7A, -7F2004-06-30current
Ptm International INCJT9D Oil Tank Cap Safety Adapter Assembly PT020001Modification partPratt & Whitney JT9D-7, -7A, -7F2004-06-30current
Ptm International INCJT9D Oil Tank Cap Safety Adapter Assembly PT020001Modification PartPratt & Whitney JT9D-59A1999-10-19current

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.