What was found
DURING FLIGHT TORQUE MISCOMP LIGHT ILLUMINATED, REDUCED POWER & LIGHT WENT OUT. ACFT RETURN TO BASE & LIGHT CAME ON AGAIN DURING HOVER FOR LANDING. ACFT LANDED & LIGHT REMAINED ON ALONG WITH AN ALTN DATA FAIL LIGHT. TECH REP RECOMMENDED CHECKING THE PLUGS AT THE PRIMARY & SECONDARY TRANSDUCERS. ALSO STATED IT COULD POSSIBLY BE ONE OF THE SIGNAL CONDITIONERS. THE PLUGS AT THE TRANSDUCERS WERE CLEANED & STABILENT 22 WAS APPLIED TO THE PINS. THE ACFT WAS FLOWN FOR ABOUT 20 MIN AT DIFFERENT TORQUE SETTINGS, SPEEDS & ALTITUDES. THE PROBLEM COULD NOT BE DUPLICATED. ACFT WAS RETURNED TO SERVICE.