Winglets
No failure report names the winglets. 8 FAA approvals let 4 companies make a replacement winglets, Marburger Enterprises INC holding the most (3).
Approved replacement parts 8 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a winglets and sell it as an approved part for the models named. These are the companies holding such approvals for a winglets:
For these models most: Piper PA-31 Navajo and Chieftain (2), Cessna T188 (2), Cessna A188 (2), Cessna 188 (2), Boeing 737 (2), Air Tractor Inc AT-502 (1), Air Tractor Inc AT-301 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Aviation Partners Boeing | Winglets 737-0010-26 | Modification Part | Boeing 737-700 | 2005-11-17 | current |
| Aviation Partners Boeing | Winglets 737-0010-25 | Modification Part | Boeing 737-700 | 2005-11-17 | current |
| Colemill Enterprises INC | Winglets 66000-13 | Modification Part | Piper PA-31, PA-31P, PA-31-325 | 2002-10-28 | current |
| Colemill Enterprises INC | Winglets 66000-12 | Modification Part | Piper PA-31, PA-31P, PA-31-325 | 2002-10-28 | current |
| Marburger Enterprises INC | Winglets 4500-1-2 | N/A | Air Tractor AT-502 | 1997-11-18 | current |
| Marburger Enterprises INC | Winglets 4500-1-2 | N/A | Air Tractor AT-301 | 1997-11-18 | current |
| Marburger Enterprises INC | Winglets 9200M-1-2 | N/A | Cessna 188B, A188B, T188C | 1997-09-16 | current |
| Aerodyne Engineering | Winglets 445-00 | Clark Oberholtzer DBA AG-TIPS 445-00 | Cessna 188B, A188B, T188C | 1996-02-15 | 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.