The U.S. aircraft register, updated daily
Parts

Hydraulic Oil

No failure report names the hydraulic oil. 16 FAA approvals let 4 companies make a replacement hydraulic oil, Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - Vt holding the most (12).

Approved replacement parts 16 parts manufacturer approvals

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

For these models most: Boeing 737 (6), Boeing 727 (6), Mcdonnell Douglas DC-10 (2), Boeing-Vertol 234 (1), Agusta A109 (1), Agusta Spa A109 (1).

MakerPartReplacesFitsGrantedStatus
Parker Hannifin CORPHydraulic Oil, Float Switch FS1507-2109-0760-45-1Agusta A109A II, A109C, A109E2016-02-15current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter Sys B 20220-010110-60554-41Boeing 737-7001998-04-19current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter 20220-010110-60554-41Boeing 737-8001998-04-19current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter 20219-010110-60554-40Boeing 737-800, 737-7001998-04-19current
Litton Systems INC, Litton Special DevicesHydraulic Oil Quanitiy Indicator 9807-47-02MDC 9807-47-02McDonnell Douglas DC-10-10, -10F, -151998-01-05current
Litton Systems INC, Litton Special DevicesHydraulic Oil Quanitiy Indicator 9807-47MDC 9807-47McDonnell Douglas DC-10-10, -10F, -301998-01-05current
Pall Aeropower CorporationHydraulic Oil Filter AD325512Y44Boeing AD325512Y44Boeing Defense 2341997-06-30current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter 20138-1000-0201Boeing 10-60554-37Boeing 737-300, -400, -5001993-12-09current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter 20140-1000-0201Boeing 10-60554-39Boeing 737-300, -400, -5001993-12-09current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Transmitter 20139-1000-0201Boeing 10-60554-38Boeing 737-300, -400, -5001993-12-09current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Indicator Simmonds P/N B711-1,...-Boeing 7271982-01-05current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Indicator Simmonds P/N...-Boeing 7271982-01-05current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil System Control Unit Simmonds P/N B1047-1,...-Boeing 7271982-01-05current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Indicator Simmonds P/N B712-4,...-Boeing 7271982-01-05current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Indicator Simmonds P/N B712-1,...-Boeing 7271982-01-05current
Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - VtHydraulic Oil Indicator Simmonds P/N B712-2,...-Boeing 7271982-01-05current

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.