What was found
FLAPS STUCK AT 20 DEG WOULD NOT RETRACT. FOLLOWED RED TABS FLAPS DID EXTEND TO 30/40 ON LANDING FLAPS RETRACTED AFTER LANDING. BOTH SYS 1 AND SYS 2 FLAP FAULT LIGHT ON IN FLIGHT. PERFORMED SERVICING OF RT WING JACKSCREWS AND TORQUE LIMITER PER AMM 12-13-27-0. ALL FLUIDS CLEAN WITH MINIMAL SERVICING REQUIRED. REMOVED AND REPLACED FLAP TORQUE LIMITER IAW MM 27-54-12-4. PERFORMED OPERATIONAL TEST OF FLAP SYSTEM AND NO DEFECTS FOUND. REINSTALLED INBD NR 1 JACKSCREW ACCESS PANEL. PER VERBAL, MTSI STEP 4 FLAP SYSTEM LUBE ACCOMPLISHED BY EMP NR 175004. PER STEP 1 PERFORMED VISUAL INSPECTION OF ALL CARRIAGES, BEARINGS, ROLLERS, JACKSCREWS, TRACKS, NO DEFECTS FOUND.