Bill Denton ) wrote:

How old was the Cessna?

Two years old.

While somebody operating out of a cornfield might use the PTT a few times a
year, somebody consistently flying in a Class B might be using it a couple
of times a minute.

Or class C. The aircraft was based at a class C airport and,
consequently, the switch was used frequently.

The switches do wear out, I wonder if it might be worth replacing it
periodically, based on how frequently it is used?

This is definitely an item that can be replaced after it fails rather
than preemptively, since there are two other switches in the cockpit
(other yoke and mic switch).

--
Peter