What was found
AFTER DEPARTURE FROM IAH-TOL, THE INBOARD FLAPS FROZE AT 2 DEGREES. AIRCRAFT RETURNED TO IAH. AFTER 10 MINUTES FLAPS WENT TO 30 DEGREES, BUT ON TAXI IN FLAPS FROZE AT 2 DEGREES AGAIN. THE FLT CREW DECLARED AN EMERGENCY INTO IAH AND MADE AN UNEVENTFUL LANDING. CLEANED AND RE-SEATED CANNON PLUG ON FLAP GAUGE, OPS AND GROUND CHECKED OK PER B727 MM 27-50. AIRCRAFT WAS RETURNED TO SERVICE. (M)