What was found
C/W QRH, YOKE TRIM SW STOPPED RUNAWAY BUT WOULD NOT MOVE OPPOSITE. ALT TRIM WORKED AS ADVERTISED. LATER WHILE S+L HEARD TRIM MOTOR HORN, BUT TRIM NOT MOVING. INSPECTED SCREWJACK. NO METAL ON BOTTOM OR TOP OF ACME NUT RESET C/B AND STOP SW. RAN STAB FULL TRAVEL W YOKE SW AND HANDLE. T/S PER M/M 27-40-00 101- CHECKS OK. REPLACED RELAYS R20-18, R20-15, R20-16 PER M/M. REPLACED PRIM AND ALT TRIM MOTORS PER M/M. RAN STP AND RTS CHECKS BOTH 1 AND 2 DFGC OK FOR SERVICE. TRIM MOTOR D1775-1 SN 1050 COND PRECAUTIONARY.