Lycoming O-290-D options

Richard Lamb wrote:


If I'm not mistaken, the O-290 has a solid crank.
Not hollow like the O-320?

Richard

I'm pretty sure that all Lyc O-235, O-290, and O-320 engines have
hollow crankshafts. Some Lyc O-360 engines have solid cranks. The
original "corrosion pits" AD proposal included all O-235, O-290, and
O-320 engines plus the O-360 engines with hollow cranks. After
lobbying by AOPA and others, the scope of the AD was reduced to
include fewer engine models. Lycoming's crankshaft inspection SB
(505, 505A, 505B) never included O-235 or O-290 engines. Lycoming's
protective coating SB (530, 530A) includes all O-235, O-290, and O-320
engines plus the O-360 engines with hollow cranks.

David O -- http://www.AirplaneZone.com