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Is the 12 year / 2200 hour rebuild mandate mandatory or just recomended ? For part 91 ? For
part 135 ? Why is there a calendar limitation at all? Thanks for helping out !!!
-- douglas fulton, June 17, 2006
There are a lot of parts, e.g., transmissions that have 2200-hour life limits. So those become mandatory for everyone. The 2200-hour engine TBO is not a limit for Part 91.
Engines older than 12 years have a bad habit of quitting, even if they don't have that many hours on them.
A big part of the genius of Robinson is coming up with a maintenance schedule that normal humans can implement, unlike the individual life limits on every part in a turbine helicopter.
-- Philip Greenspun, June 18, 2006