What was found
ENGINE HAD A LOSS OF POWER, THE FIRST DROP IN POWER WAS FROM 2400 RPM TO 2100 RPM. THEN A SLIGHT RISE IN POWER THEN BACK DOWN TO 2100 RPM. AFTER ADJUSTING THE MIX, CHECKING THE MAGNETOS WHERE ON BOTH, TURNING FUEL PUMP ON, AND VERIFYING FUEL SELECTOR WAS IN THE ON POSITION, THE RPMS DROPPED TO 1800. DUE TO LOSS OF POWER AIRCRAFT MADE AN EMERGENCY LANDING.