Weight On
No failure report names the weight on. 6 FAA approvals let 3 companies make a replacement weight on, Honeywell International INC holding the most (3).
Approved replacement parts 6 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a weight on and sell it as an approved part for the models named. These are the companies holding such approvals for a weight on:
For these models most: Boeing 777 (3), Short Bros SD3 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Honeywell International INC | Weight on wheels operational program software (WOW CARD OPS) PS4083292-901 | Boeing 326D-HNY-002-01 | Boeing 777-200 | 1997-06-22 | current |
| Honeywell International INC | Weight on Wheels (WOW) Card 4076777-901 | Boeing S283W301-2 | Boeing 777-200 | 1995-05-10 | current |
| Honeywell International INC | Weight on Wheels Operational Program Software (WOW OPS) Card PS4077943-901 | Boeing S243W001-6000 | Boeing 777-200 | 1995-05-10 | current |
| Aviation Technologies INC | Weight on Wheels Switch 404HE99-6 | Modification Part | British Aerospace 3101 and 3201, 3101 and 3201 | 1995-02-26 | current |
| Aviation Technologies INC | Weight-On Wheels Switch 21HE29-12 | Short Brothers 21EN9-12, Modification Part | Short Brothers SD3-30, SD3-60 | 1994-02-13 | current |
| Aviation Technologies Group | Weight-On Wheels Switch 21HE29-12 | Micro Switch 21EN9-12 | Short Brothers SD3-30 | 1992-02-20 | 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.