Disc Stud
No failure report names the disc stud. 10 FAA approvals let 4 companies make a replacement disc stud, Western Filter Corporation holding the most (5).
Approved replacement parts 10 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a disc stud and sell it as an approved part for the models named. These are the companies holding such approvals for a disc stud:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Western Filter A Division of Donalson Company INC | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2013-03-11 | current |
| Western Filter A Division of Donaldson Company INC | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2009-08-20 | current |
| Western Filter A Division of Donaldson Company INC | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2009-05-28 | current |
| Western Filter Corporation | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2008-04-16 | current |
| Western Filter Corporation | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2007-09-18 | current |
| Western Filter Corporation | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2006-10-29 | current |
| Western Filter Corporation | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2005-05-15 | current |
| Western Filter Corporation | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2004-01-04 | current |
| Puroflow INC | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | 6827960 | Rolls-Royce 501-D13, D13A, D13D | 2002-03-03 | current |
| Puroflow INC | Disc & Stud Assembly Fuel Filter 17 Packs 3157 | Allison 6827960 | Allison Engine 501-D13, D13A, D13D | 1995-09-17 | 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.