The U.S. aircraft register, updated daily
Parts

Cap Hyd

No failure report names the cap hyd. 4 FAA approvals let 2 companies make a replacement cap hyd, Aerofit INC holding the most (3).

Approved replacement parts 4 parts manufacturer approvals

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

For these models most: Boeing 747 (4), Boeing 737 (4), Boeing 777 (3), Boeing 767 (3), Boeing 757 (3).

MakerPartReplacesFitsGrantedStatus
Aerofit INCCap Assy-Hyd Fitting BACC14AD06LBACC14AD06JLBoeing 737-100, 737-200, 737-3002005-12-15current
Aerofit INCCap Assembly-Hyd Fitting BACC14AD06LBACC14AD06JLBoeing 737-100, 737-200, 747-1002004-05-17current
Faber Enterprises INCCap Assembly-Hyd Fitting BACC14AD06JLBACC14AD06JLBoeing 737-100, -200, -3002000-01-26current
Aerofit INCCap Assembly-Hyd Fitting BACC14AD06JLBoeing BACC14AD06JLBoeing 737-100, 737-200, 737-3001999-05-11current

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.