Priority Valve
74 failure reports named the priority valve in the last ten years, 388 since 1995, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "failed". 17 FAA approvals let 5 companies make a replacement priority valve, Parker Hannifin CORP holding the most (9). The reports call it "priority valve", "priority valve".
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 4 |
| 1998 | 2 |
| 2000 | 10 |
| 2001 | 6 |
| 2002 | 22 |
| 2003 | 26 |
| 2004 | 26 |
| 2005 | 26 |
| 2006 | 15 |
| 2007 | 34 |
| 2008 | 24 |
| 2009 | 21 |
| 2010 | 29 |
| 2011 | 21 |
| 2012 | 17 |
| 2013 | 14 |
| 2014 | 9 |
| 2015 | 6 |
| 2016 | 11 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 7 |
| 2026 | 8 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Landing gear | 37 |
| Heating, ice protection and utility systems | 33 |
| Engine | 4 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| failed | 22 |
| leaking | 15 |
| malfunctioned | 12 |
| defective | 6 |
| faulted | 6 |
| faulty | 3 |
| bypassing | 1 |
| cracked | 1 |
| no test | 1 |
| none | 1 |
Engines most often reporting it
Approved replacement parts 17 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a priority valve and sell it as an approved part for the models named. These are the companies holding such approvals for a priority valve:
For these models most: Boeing 777 (5), Embraer ERJ 170 E170 and E175 (4), Embraer ERJ 190 E190 and E195 (2), Dassault FALCON 6 (1), Bombardier CL-600 Challenger and CRJ (1), Airbus A300 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Eaton Corporation, Aerospace Group; Fuel & Motion Control Division | Priority Valve 3033112-000 | Dassault Specification Control Drawing 3033112-000 | Dassault Aviation Falcon 6X | 2026-06-18 | current |
| Parker Hannifin CORP | Priority Valve 975239-1 | GX473-0060-1 | Bombardier Inc. Canadair) (BD-700-1A10 | 2011-10-23 | current |
| Parker Hannifin CORP | Priority Valve 975239-1 | GX473-0060-1 | Bombardier Inc. Canadair) (BD-700-1A10 | 2011-10-23 | current |
| Parker Hannifin CORP | Priority Valve 975239-1 | GX473-0060-1 | Bombardier Inc. Canadair) (BD-700-1A10 | 2011-10-17 | current |
| Parker Hannifin CORP | Priority Valve 975288-3 | 975288-3 | Embraer Empresa ERJ 170-100 LR, ERJ 170-100 SDT, ERJ... | 2009-04-28 | current |
| Parker Hannifin CORP | Priority Valve - Hydraulic System 975303-3 | 975303-3 | Embraer Empresa ERJ 170-100 STD, ERJ 170-100 LR, ERJ... | 2009-04-28 | current |
| Parker Hannifin CORP | Priority Valve 975288-3 | 190-03005-401 | Embraer Empresa ERJ 190-100 IGW, ERJ 190-100 LR, ERJ... | 2005-09-22 | current |
| Parker Hannifin CORP | Priority Valve-Hydraulic System 975303-3 | 190-03003-401 | Embraer Empresa ERJ 190-100 IGW, ERJ 190-100 LR, ERJ... | 2005-09-22 | current |
| Parker Hannifin CORP | Priority Valve - Hydraulic System 975303-3 | 170-66984-801 | Embraer ERJ 170-100 STD, ERJ 170-100 LR | 2004-02-19 | current |
| Parker Hannifin CORP | Priority Valve 975288-3 | 170-28266-801 | Embraer ERJ 170-100 STD, ERJ 170-100 LR | 2004-02-19 | current |
| Eaton Aerospace Sterer Engineering | Priority Valve - MLG 71444 | S271W814-1 | Boeing 777-200, 777-300 Series | 2000-11-07 | current |
| Eaton Aerospace Sterer Engineering | Priority valve 71756 | S271W814-21 | Boeing 777-300 SERIES | 2000-11-07 | current |
| Eaton Aerospace Sterer Engineering | Priority valve 45980-1 and 45990-1 | 45980-1 and 45990-1 | Airbus A300B4-1C, A300B4-2C, A300B2K-3C | 2000-11-07 | current |
| Eaton Aerospace Sterer Engineering | Priority Valve - FL 71756 | S271W814-21 | Boeing 777-200 | 2000-11-07 | current |
| Vickers INC, Fluid Control and Actuation Div | Priority Valve - MLG 71444 | Boeing S271W814-1 | Boeing 777-300 Series | 1998-06-09 | current |
| Vickers INC, Fluid Control and Actuation Div | Priority Valve-FL 71756 | Boeing S271W814-21 | Boeing 777-300 Series | 1998-06-09 | current |
| Pneudraulics INC | Priority valve 4619-3, 4622 | Canadair 4619-3 4622 | Bombardier, Inc. CL600-2B19 (Regional Jet Series 100) | 1995-02-27 | current |
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.