Sun Gear
3 failure reports named the sun gear in the last ten years, 44 since 1995, most often on the Boeing-Vertol 234; the condition most often found was "damaged". 2 FAA approvals let 2 companies make a replacement sun gear, Rotair Industries INC holding the most (1). The reports call it "sun gear", "sun gear tooth".
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 4 |
| 1996 | 8 |
| 1997 | 2 |
| 1998 | 5 |
| 1999 | 1 |
| 2000 | 3 |
| 2001 | 1 |
| 2002 | 2 |
| 2004 | 2 |
| 2005 | 2 |
| 2009 | 1 |
| 2011 | 5 |
| 2012 | 2 |
| 2013 | 1 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 2 |
| 2019 | 1 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Engine | 1 |
| Rotorcraft systems | 1 |
| Airframe structure | 1 |
Models most often reporting it last ten years
Models most reported, as a table
| reports | |
|---|---|
| Boeing-Vertol 234 | 2 |
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| damaged | 1 |
| distressed | 1 |
| spalled | 1 |
Engines most often reporting it
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a sun gear and sell it as an approved part for the models named. These are the companies holding such approvals for a sun gear:
For these models most: Sikorsky S-61 (1), Boeing 767 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Aviation Facilities INC | Sun Gear 3501688-1 AFI | Boeing/Honeywell (Allied Signal Aerospace) 3501688-1 | Boeing 767 where Honeywell (Allied Signal... | 2001-04-10 | current |
| Rotair Industries INC | Sun Gear, Main Gear Box R6137-23055-1 | S6137-23055-1 | Sikorsky S61A/D/L/N/NM/R | 1997-02-22 | 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.