What was found
PILOT REPORTED FLICKERS AND INTERMITTENT SOLID, ROTOR RPM LIGHT ON CWP. PILOT VERIFIED NR ON TRIPLE TACH AND VEMD FOR N2 MATCHED AND WERE STABLE. ABORTED CALL & RETURNED TO BASE TO INITIATE DISCREPANCY, CONTACT MECHANIC, MCAS. UPON ARRIVAL, INSPECTED MGB COMPARTMENT COMPONENTS OF SYSTEM, SAW NO OBVIOUS DEFECTS. ALL HEAT SHRINK WERE CLEAN & DRY IN APPEARANCE. CUT AWAY HEAT SHRINK AT NEW CONNECTION PROVIDED BY MEANS OF SB-EC-135-63-008-2C1; DISCOVERED IMPROPERLY CRIMPED CONNECTIONS BY APPLYING LIGHT TENSION TO CONNECTORS. REMOVED FAULTY CRIMPS AND INSTALLED NEW CRIMPED CONTACTS IAW SB LISTED ABOVE. RESTORED ACFT COWLINGS TO FLIGHT CONFIGURATION AND PERFORMED MAINTENANCE CHECK FLIGHT, NO DEFECTS NOTED.