Cylinder Base
No failure report names the cylinder base. 3 FAA approvals let 2 companies make a replacement cylinder base, Yesteryear Aviation INC holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a cylinder base and sell it as an approved part for the models named. These are the companies holding such approvals for a cylinder base:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Air Repair INC | Cylinder Base Nut 2557 | 2557 | Air Repair, Inc. W670 Series | 2014-02-06 | current |
| Yesteryear Aviation INC | Cylinder Base Packing YASTD-499 | STD-499 | Lycoming R-680- E1, E2, E3 | 2010-05-13 | current |
| Yesteryear Aviation INC | Cylinder Base Seal YA2845-1 | 2845 | Teledyne Continental W670-6A, W670-6N, W670-16 | 2009-03-16 | 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.