Flying north from Florida last week, overnighted in Va.
WX not too good next day so waited 1 day to continue north.
A/C was tied down & covered but forgot to install cowl plugs
Rest of flight normal but.... Decided to start my annual so removed
the cowls and quickly noticed bird dirt on top of cooling fins!
Closer look revealed nice little handful of straw in behind # 3 cylinder
.... It's nesting season... Plug those holes.