Sight Hole
No failure report names the sight hole. 2 FAA approvals let 2 companies make a replacement sight hole, St. Louis Helicopter, LLC holding the most (1).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a sight hole and sell it as an approved part for the models named. These are the companies holding such approvals for a sight hole:
For these models most: Piper PA-31 Navajo and Chieftain (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Aerospace Solutions Group, LLC | Sight hole and cover panel and universal mounting plate... SLH-005 Kit | Modification Part | Piper Aircraft Inc. PA-31, PA-31-300, PA-31-325 | 2019-04-09 | current |
| St. Louis Helicopter, LLC | Sight hole and cover panel and universal mounting plate... SLH-005 Kit | Modification Part | Piper Aircraft Inc. PA-31, PA-31-300, PA-31-325 | 2017-03-08 | 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.