Spiral Grid
No failure report names the spiral grid. 3 FAA approvals let 1 company make a replacement spiral grid, Alcore INC holding the most (3).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spiral grid and sell it as an approved part for the models named. These are the companies holding such approvals for a spiral grid:
For these models most: Boeing 727 (3).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Alcore INC | Spiral Grid Dwg No GG205, Rev H, Dated 11/12/70 10-60874-4 | 10-60874-4 | Boeing 727-200 | 1998-06-04 | current |
| Alcore INC | Spiral Grid Dwg No 10-60874-2, Rev H, Dated 11/12/70 GG177D | 10-60874-2 | Boeing 727-100, -200 | 1998-06-04 | current |
| Alcore INC | Spiral Grid Dwg No GG186, Rev H, Dated 11/12/70 10-60874-3 | 10-60874-3 | Boeing 727-200 | 1998-06-04 | 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.