"HEATHROW DIRECTOR"... "BURP"...B737 OPERATORS FOR THE PAST COUPLE OF YEARS HAVE BEEN USING A MODIFIED FLAP SPEED SCHEDULE...THIS...TO GIVE CREWS BETTER CONTOL MARGINS IN THE EVENT OF A MISBEHAVING RUDDER...CONTROLLERS CAN PROBABLY TAKE IT AS READ THAT B737 FLYING AT 160 KTS WILL REQUIRE "GEAR DOWN FLAP 15" A HIGH NOISE AND DRAG CONFIGURATION...170 TO 4NMS WOULD WORK BETTER FOR OUR A/C...TR3