Are you guys reading what viperdoc wrote? The mechanic replaced a belt
with a new one and it came off. I thinks it's perfectly reasonable to
look at the obvious. The belt simply may not have been installed
correctly.
Dave
M35

nrp wrote:
Viperdoc - What type aircraft? Is your alternator driven from the
prop end, or the back end of the engine? If it is driven from the
back end, you have serious internal damper problems in your engine.