What was found
FLAPS WOULD NOT RETRACT AFTER TAKE OFF. FLAPS STUCK AT 20 DEGREES. RECYCLE, NO HELP. RETRACTED NORMAL AFTER LANDING. AFTER BLOCK IN, NOTED FLAPS WERE FULLY RETRACTED. INTERROGATED MTP, NO FAULTS. INSPECTED BOTH NR 1 & NR 2 SFCC'S. BOTH SFCC'S REGISTERED A "FLAP JAM" FAULT. RESET BOTH SFCC'S & PERFORMED BITE TEST IAW TSM 27-50-00. ALL TESTS PASSED NO FAULTS NOTED WITH BOTH SYSTEM TORQUE LIMITER INDICATORS. VISUALLY INSPECTED ALL SCREWJACKS ON BOTH LT & RT FLAP ASSY. ALL INSPECTIONS SATISFACTORY. RAN BOTH ENGINES IAW JRH. OPERATED FLAPS IAW AMM 27-50-00-03 AT ALL FLAP SETTINGS SEVERAL TIMES. NO ABNORMALITIES NOTED. NO FURTHER ABNORMALITIES NOTED ON MTP & OVERHEAD FLAP SYSTEM FAULT INDICATORS. ACFT OK FOR SERVICE.