I have a 1975 P337G. The POH states gear can come down at 160 MPH and below. 1st degree of flap at 160 MPH, 2nd degree of flaps at or below 140 MPH and full flap at or below 120 MPH. Been doing it this way for years.
My plane is equipped with spoilers and thus I am not too concerned about shock cooling since I generally leave engine setting the same as I descend.
Jerry
