What was found
AN INFLIGHT OUT OF TRIM SITUATION WHICH WAS DESCRIBED AS, AN EXCESSIVE NOSE UP PITCH, ON TAKEOFF REQUIRING AN IMMEDIATE ACTION. FOUND THE BRASS DRIVE GEAR LOOSE ON THE ELEVATOR TRIM WHEEL. THIS RESULTED IN THE TRIM POSITION INDICATING DIAL SLIPPING DURING TRIM WHEEL OPERATION & GIVING A FALSE INDICATION OF THE ELEVATOR TRIM TAB POSITION. MX SHOULD BE AWARE OF THE POSSIBILITY OF SLIPPAGE, BETWEEN THE ELEVATOR TRIM WHEEL & THE DIAL ASSEMBLY. A MX ADVISORY CONTAINING INSTRUCTIONS ON HOW TO CHECK FOR & CORRECT THIS HAS BEEN ISSUED.