Spiral Ring
No failure report names the spiral ring. 6 FAA approvals let 1 company make a replacement spiral ring, True Lock LLC holding the most (6).
Approved replacement parts 6 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spiral ring and sell it as an approved part for the models named. These are the companies holding such approvals for a spiral ring:
For these models most: Rockwell International 112 (1), Gulfstream American Corp G-1159 (1), Dehavilland DHC-2 (1), Cub Crafters CC18 (1), Commander Aircraft Co 114 (1), Cirrus SR22 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| True Lock LLC | 1.25-12 Spiral Ring APV-1.25-12-4 | Modification Part | Cub Crafters CC18-180, CC18-180A | 2016-08-04 | current |
| True Lock LLC | 1.00-16-4 Spiral Ring APV-1.00-16-4 | Modification Part | Viking Air Limited DHC-2 Mk. I, DHC-2 Mk. II, DHC-2 Mk. III | 2016-08-04 | current |
| True Lock LLC | Spiral Ring LG-2.437-16-5 | Modification Part | Gulfstream Aerospace... G-1159, G-1159A, G-1159B | 2010-06-14 | current |
| True Lock LLC | Spiral Ring APV-1.375-18-4 | Modification Part | Commander Aircraft Company 112, 114, 112TC | 2010-06-14 | current |
| True Lock LLC | Spiral Ring APV-1.50-16-4 | Modification Part | Raytheon Beech) (G36) Cirrus Design... | 2010-06-14 | current |
| True Lock LLC | Spiral Ring APV-1.25-12-4 | Modification Part | Raytheon Beech) (G36 | 2010-06-14 | 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.