What was found
UPON TAKEOFF, PLANE CONTINUED TO PITCH UP. WHILE AP ON PLANE CONTINUED TO PITCH HIGH WITH AIRSPEED FROZEN TO LOWER NUMBERS. MANUAL SPEED TO RETRACT FLAPS- PLANE CONTINUED TO PITCH HIGH- FOLLOWED MEMORY ITEMS FOR SUSPECTED PITCH TRIM. DISCONNECTED ALL AND HAND FLOWN. AND RETURN TO GATE. ADVISORY- MESSAGE PITCH TRIM SW 1 FAIL FLIGHT 3342 - FILED CLOSED FOUND CAPT YOKE TRIM SWITCH BROKEN, REPLACED SWITCH PER AMM. "PITCH TRIM SW 1FAIL " MESSAGE EXTINGUISHED. REPLACED REF ITEM #416139 FOR ASSOCIATED DISCREPANCY.