Valve Steering
No failure report names the valve steering. 6 FAA approvals let 3 companies make a replacement valve steering, Sargent Controls & Aerospace holding the most (4).
Approved replacement parts 6 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a valve steering and sell it as an approved part for the models named. These are the companies holding such approvals for a valve steering:
For these models most: Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Parker Hannifin CORP | Valve Assembly – Steering Metering Nose Wheel 2670005M7 | 60B00210-7 | Boeing 747-100 Series, 747-100B Series,... | 2022-10-28 | current |
| Sargent Controls & Aerospace | Valve Assembly steering 40001-005 | LASC 672435-127 | Lockheed L-1011-385-1, L-1011-385-1-14,... | 1995-06-04 | current |
| Sargent Controls & Aerospace | Valve Assembly steering 40001-502 | LASC 672435-119 | Lockheed L-1011-385-1, L-1011-385-1-14,... | 1995-06-04 | current |
| Sargent Controls & Aerospace | Valve Assembly steering 40001-004 | LASC 672435-121 | Lockheed L-1011-385-1, L-1011-385-1-14,... | 1995-06-04 | current |
| Sargent Controls & Aerospace | Valve Assembly steering 40001-503 (part of 40001-005) | LASC 672435-123 | Lockheed L-1011-385-1, L-1011-385-1-14,... | 1995-06-04 | current |
| Sargent Aerospace | Valve Assembly-Steering 40001-503 | LASC 672435-123 | Lockheed L-1011-385-1, -385-1-14, -385-1-15 | 1993-01-18 | 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.