Mixing Valve
15 failure reports named the mixing valve in the last ten years, 52 since 1995, most often on the Learjet 60; the condition most often found was "defective". 14 FAA approvals let 4 companies make a replacement mixing valve, Meggitt Addison INC (Formerly Keith Products LP) holding the most (4).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 3 |
| 1996 | 1 |
| 1999 | 6 |
| 2004 | 3 |
| 2005 | 3 |
| 2006 | 1 |
| 2007 | 5 |
| 2009 | 4 |
| 2010 | 1 |
| 2011 | 3 |
| 2012 | 1 |
| 2013 | 2 |
| 2014 | 3 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 4 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2026 | 1 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Heating, ice protection and utility systems | 12 |
| Landing gear | 2 |
| Engine | 1 |
Models most often reporting it last ten years
Models most reported, as a table
| reports | |
|---|---|
| Learjet 60 | 4 |
| Fairchild SA227 | 3 |
| Swearingen SA227 | 3 |
| Beechcraft 400 Beechjet | 2 |
| Boeing 737 | 1 |
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| defective | 3 |
| intermittent | 3 |
| malfunctioned | 2 |
| stuck | 2 |
| bent | 1 |
| cracked | 1 |
| failed | 1 |
| faulty | 1 |
| worn | 1 |
Engines most often reporting it
Approved replacement parts 14 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a mixing valve and sell it as an approved part for the models named. These are the companies holding such approvals for a mixing valve:
For these models most: Airbus Helicopters EC-135 now H135 (8), Boeing 727 (3), Douglas DC-8 (2), Boeing 707 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Air Comm Corporation | Mixing Valve JBS880-2 | JBS880-2 | Airbus Helicopters... EC135 | 2026-08-31 | current |
| Air Comm Corporation | Mixing Valve JBS880-3 | JBS880-3 | Airbus Helicopters... EC135 | 2026-08-31 | current |
| Air Comm Corporation | Mixing Valve JBS880-3 | JBS880-3 | Airbus Helicopters... EC135 | 2025-02-10 | current |
| Air Comm Corporation | Mixing Valve JBS880-2 | JBS880-2 | Airbus Helicopters... EC135 | 2025-02-10 | current |
| Honeywell International INC. | Mixing Valve 398148-1-1 | 10-61426-10 | The Boeing Company 727 Series, 727-100 Series, 727C Series | 2023-01-31 | current |
| Honeywell International INC. | Mixing Valve 398444-1-1 | 10-61426-21 | The Boeing Company 727 Series, 727-100 Series, 727C Series | 2023-01-31 | current |
| Honeywell International INC. | Mixing Valve 398444-2-1 | 10-61426-22 | The Boeing Company 727 Series, 727-100 Series, 727C Series | 2023-01-31 | current |
| Honeywell International INC. | Mixing Valve 321392-1 | 10-3367-4 | Boeing 707-100 Long Body, 707-200, 707-100B... | 2023-01-09 | current |
| Meggitt Addison INC (Formerly Keith Products LP) | Mixing Valve JBS 880-3 | JBS 880-3 | Eurocopter Deutschland EC135 | 2006-06-19 | current |
| Meggitt Addison INC (Formerly Keith Products LP) | Mixing Valve JBS880-2/ -3 | JBS880-2/-3 | Eurocopter Deutschland EC135 | 2005-07-12 | current |
| Ge Aviation Systems LLC (Formerly Smiths and Barbar Coleman) | Mixing Valve Actuator BYLG-5696-3 | BYLG-5696-3 | McDonnell Douglas DC-8-10 through DC-8-40 series airplanes | 2003-07-16 | current |
| Ge Aviation Systems LLC (Formerly Smiths and Barbar Coleman) | Mixing Valve Actuator BYLG-5696-3 | Modification Part | McDonnell Douglas DC-8-11, DC-8-12, DC-8-21 | 2003-04-16 | current |
| Meggitt Addison INC (Formerly Keith Products LP) | Mixing Valve JBS880-3 | JBS880-3 | Eurocopter Deutschland EC135 | 2002-01-09 | current |
| Meggitt Addison INC (Formerly Keith Products LP) | Mixing Valve JBS880-2 | JBS880-2 | Eurocopter Deutschland EC135 | 2002-01-09 | 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.