Modulating Valve
391 failure reports named the modulating valve in the last ten years, 483 since 1998, most often on the Boeing 737; the condition most often found was "faulty". 14 FAA approvals let 3 companies make a replacement modulating valve, Honeywell International INC. holding the most (11).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1998 | 1 |
| 1999 | 1 |
| 2004 | 1 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 11 |
| 2009 | 12 |
| 2010 | 12 |
| 2011 | 4 |
| 2012 | 23 |
| 2013 | 12 |
| 2014 | 6 |
| 2015 | 7 |
| 2016 | 12 |
| 2017 | 6 |
| 2018 | 18 |
| 2019 | 23 |
| 2020 | 43 |
| 2021 | 72 |
| 2022 | 98 |
| 2023 | 98 |
| 2024 | 12 |
| 2025 | 8 |
| 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 | 379 |
| Engine | 10 |
| Emergency equipment | 1 |
| Landing gear | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| faulty | 131 |
| faulted | 87 |
| failed | 63 |
| inoperative | 45 |
| malfunctioned | 23 |
| warning light | 8 |
| defective | 5 |
| fault message | 4 |
| intermittent | 4 |
| out of range | 3 |
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 modulating valve and sell it as an approved part for the models named. These are the companies holding such approvals for a modulating valve:
For these models most: Boeing 747 (4), Piper PA-46 Malibu, Mirage, Matrix and M-Class (1), Mcdonnell Douglas MD-11 (1), Israel Aircraft Industries GALAXY (1), Fairchild SA227 (1), Boeing 767 (1), Boeing 757 (1), Boeing 727 (1), Atr-Gie Avions De Trnsp Rgnl ATR 72 (1), Airbus A300 (1), Aerospatiale ATR 72 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Honeywell International INC. | Modulating Valve 979788-1 | 979788-1 | Lockheed Martin Corporation L-1011-385-1, L-1011-385-1-14,... | 2023-05-02 | current |
| Honeywell International INC. | Modulating Valve 396416-2 | 396416-2 | Airbus SAS A300 B2-1A, A300 B2-1C, A300 B2-203 | 2023-04-10 | current |
| Honeywell International INC. | Modulating Valve 3291250-1 | V25W781301-001 | Israel Aircraft... Galaxy | 2023-04-05 | current |
| Honeywell International INC. | Modulating Valve 398786-5 | S210T130-74 | The Boeing Company 757-200 Series | 2023-02-17 | current |
| Honeywell International INC. | Modulating Valve 398786-5 | S210T130-74 | The Boeing Company 767-200 Series, 767-300 Series | 2023-02-17 | current |
| Honeywell International INC. | Modulating Valve 979088-7 | 60B89006-102 | The Boeing Company 747-400 Series, 747-400F Series | 2023-02-16 | current |
| Honeywell International INC. | Modulating Valve 398396-5 | 398396-5 | The Boeing Company MD-11F | 2023-02-14 | current |
| Honeywell International INC. | Modulating Valve 898356-2-1 | 898356-2-1 | The Boeing Company 747-100 Series, 747-200B Series,... | 2023-02-09 | current |
| Honeywell International INC. | Modulating Valve 392220-1-1 | 10-60492-2 | The Boeing Company 727 Series, 727-100 Series, 727C Series | 2023-01-31 | current |
| Honeywell International INC. | Modulating Valve 979458-5 | 979458-5 | Ontic Engineering... SA226-T, SA226-AT, SA226-T(B) | 2023-01-07 | current |
| Honeywell International INC. | Modulating Valve 979990-1 | 979990-1 | ATR ATR72-101, ATR72-201, ATR72-211 | 2023-01-04 | current |
| Enviro Systems INC. | Modulating Valve 1300330 | 1300330 | Piper PA-46-500TP | 2004-02-17 | current |
| Honeywell International INC | Modulating Valve 979088-7 | Boeing Commercial Airplane Group 60B89006-102 | Boeing 747-400 series, 747-400F series | 1998-05-06 | current |
| Honeywell International INC | Modulating Valve 868356-2-1 | Boeing 898356-2-1 | Boeing 747-100, -SP, -200 | 1993-08-05 | 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.