Mach
No failure report names the mach. 5 FAA approvals let 3 companies make a replacement mach, Goodrich Landing Gear holding the most (2).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a mach and sell it as an approved part for the models named. These are the companies holding such approvals for a mach:
For these models most: Douglas DC-8 (2), Boeing 747 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Honeywell International INC. | Mach, Trim 538304-4 | 538304-4 | British Aerospace 1-11 200 series, 1-11 400 series | 2022-07-26 | current |
| Goodrich Landing Gear | MACH ASSY 65B01218-13 | 65B01218-13 | Boeing 747-100 SERIES, 747-100B SERIES,... | 2009-04-09 | current |
| Goodrich Landing Gear | MACH ASSY 65B01218-13 | 65B01218-13 | Boeing 747-100 SERIES, 747-100B SERIES,... | 2009-04-09 | current |
| Gs Rasmussen and Associates INC | Mach/Airspeed Indicator, Type No 109A 10901 through 10907 | Modification Part | McDonnell Douglas DC-8-62, 62F, 63 | 1994-07-17 | current |
| Gs Rasmussen and Associates INC | Mach/Airspeed Indicator, Type No 309A 3091 through 3094 | Modification Part | McDonnell Douglas DC-8-62, 62F, 63 | 1994-07-17 | 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.