Valve Trim
No failure report names the valve trim. 11 FAA approvals let 5 companies make a replacement valve trim, Honeywell International INC. holding the most (5).
Approved replacement parts 11 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a valve trim and sell it as an approved part for the models named. These are the companies holding such approvals for a valve trim:
For these models most: Airbus A350 (5), Boeing 747 (4), Mcdonnell Douglas DC-10 (2), Douglas DC-10 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Honeywell International INC. | Valve Trim 3291996-00 | 3291996-00 | Airbus SAS A350-941 | 2023-03-31 | current |
| Honeywell International INC. | Valve Trim Air 398396-3 | 398396-3 | The Boeing Company DC-10-10, DC-10-10F, DC-10-30 | 2023-02-21 | current |
| Honeywell International INC. | Valve Trim Air 398398-2 | 398398-2 | The Boeing Company DC-10-10, DC-10-10F, DC-10-30 | 2023-02-21 | current |
| Honeywell International INC. | Valve-Trim Air 3291978-01 | 3291978-01 | Airbus A350-941 | 2017-06-11 | current |
| Honeywell International INC. | Valve-Trim 3291996-01 | 3291996-01 | Airbus A350-941 | 2017-05-30 | current |
| Honeywell International INC. Honeywell Aerospace | Valve-Trim 3291996-00 | 3291996-00 | Airbus A350-941 | 2014-12-08 | current |
| Honeywell International INC. Honeywell Aerospace | VALVE-TRIM AIR 3291978-00 | 3291978-00 | Airbus A350-941 | 2014-12-04 | current |
| Aero Fluid Products | Valve Trim Air Check 7000-559043 | Boeing Co. P/N 5590-4-3 | Boeing Co. Models 747-100 Series, -200B, -200C | 2013-07-23 | current |
| Aerocontrolex Group, Transdigm INC | Valve Trim Air Check 7000-559043 | Boeing 5590-4-3 | Boeing 747-100 Series, -200B, -200C | 1993-12-28 | current |
| Imo Industries INC | Valve Trim Air Check 7000-559043 | boeing 5590-4-3 | Boeing 747-100 series, -200B, -200C | 1989-07-09 | current |
| Imo Industries INC | Valve Trim Air Check 7000-559043 | boeing 5590-4-3 | Boeing 747-100 series, -200B, -200C | 1989-07-09 | 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.