cbern the answer will be in your Co ops manual. Many outfits
vary the Airboos procedure to suit the type of operation e.g.
the capt can vary the transit check (such as that in between
a short hop and a next sector ETOPS leg) as he sees fit. In
my case I'll check EVERY thing (again if need be) before I
barrell off for 6 hrs over a shark-infested sea 800nm from
the nearest craphole airport, SOP notwithstanding.
Our Co SOP insists on a full check -
After a change of cockpit crew (even partial)
After the aircraft has been vacated by pilots in excess of 2 hours
After the thing has been hauled off to the hangar for any duration whatsoever
If the captain deems it for any reason