Originally Posted by
spamcanner
Perhaps it harks back to the days of the cavalry?
Probably correct. Cavalry=horses - Royal Flying Corps=still horsey era - then RAF. Easier for a right handed chap to swing his right leg over the side to get in. Old habits die hard.
Just a thought. Don't the brown jobs clamber into their Apaches from the Starboard side? Must be an American affectation.