Prefilter
No failure report names the prefilter. 11 FAA approvals let 2 companies make a replacement prefilter, Keddeg Company holding the most (8).
Approved replacement parts 11 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a prefilter and sell it as an approved part for the models named. These are the companies holding such approvals for a prefilter:
For these models most: Boeing 767 (8), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Keddeg Company | Prefilter Assembly 21FP604 | Modification Part | Boeing B737-300, B737-400, B737-500 | 2010-05-26 | current |
| Keddeg Company | Prefilter 21FP606 | Donaldson P/N AB0476901 | Boeing 767-300 Series | 2010-05-26 | current |
| Keddeg Company | Prefilter 21FP606 | Donaldson P/N AB0476901 | Boeing 767-300 Series | 2010-04-08 | current |
| Keddeg Company | Prefilter 21FP605 | Donaldson AB0468961 | Boeing 767-200 Series | 2003-03-13 | current |
| Keddeg Company | Prefilter 21FP606 | Donaldson AB0476901 | Boeing 767-300 Series | 2003-03-13 | current |
| Keddeg Company | Prefilter 21FP605 | Donaldson AB0468961 | Boeing 767-200 Series | 2002-06-12 | current |
| Keddeg Company | Prefilter 21FP606 | Donaldson AB0476901 | Boeing 767-300 Series | 2002-06-12 | current |
| Keddeg Company | Prefilter Assembly 21FP604 | Modification Part | Boeing B737-300, 400, 500 | 2002-06-12 | current |
| Donaldson Company INC | Prefilter Assembly AB0476901 | Boeing AB0476901 | Boeing 767-300 | 1999-04-08 | current |
| Donaldson Company INC | Prefilter Assembly AB0468961 | Boeing AB0468961 | Boeing 767-200 | 1999-04-08 | current |
| Donaldson Company INC | Prefilter Assembly AB0484253 | Boeing AB0484253 | Boeing 747-400 | 1999-04-08 | 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.