What was found
FLAPS STUCK AT 20 DEG ON TAKEOFF. WOULD NOT MOVE AND RECYCLE WAS NO HELP. LEFT FLAPS DOWN AFTER LANDING AT 20 DEG. NR 1 SFCC FAULTED HIGH SPEED P SWITCH AND NR 2 SFCC FAULTED FLAP JAM. R & R SCREWJACK IAW AMM 27-54-21-04, 27-54-22-04, & 27-54-24-04. CARRIED OUT EXTENSION AND RETRACTION OF FLAP WITH ACFT SYS IAW AMM 27-50-00-3, PG 1 TO 3 MORE THAN TEN TIMES FOUND SATIS SFCC ALL NO FAULT. ATB CONFERENCE WITH MOCC/ DUTY MGR AND CALL UP ACFT FOR SERVICE.