7 failure reports named the drive gear in the last ten years, 115 since 1995, most often on the Cirrus SR22; the condition most often found was "spalled". 7 FAA approvals let 4 companies make a replacement drive gear, Aerometals holding the most (4).
Reports by year
Reports by year, as a table
reports
1995
3
1996
12
1997
5
1998
6
1999
2
2000
9
2001
6
2002
8
2003
9
2004
1
2005
11
2006
4
2007
8
2008
2
2009
7
2010
6
2011
2
2012
1
2013
1
2014
2
2015
3
2016
1
2017
2
2018
1
2020
1
2022
1
2026
1
Which system the reports file it under last ten years
Approved replacement parts 7 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a drive gear and sell it as an approved part for the models named. These are the companies holding such approvals for a drive gear:
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.
