We had a Mooney shop that figured out that Mooney gear actuator gears
are actually the same as some Cessna flap gears (the manufactor shipped
some to Cessna and some to Mooney). For about 3 years you couldn't get
Mooney gears so this shop grabbed a bunch of the Cessna ones. A friend
of mine bought some and about a month later got a call from the FAA in
Sacramento. They knew that Mooney gears could not be found and wanted
to know how he got his. The FAA was hoping most Mooneys would just be
grounded. Grounding the GA fleet would improve the aviation safety
record.

-Robert