N911KD

ATA 6320

Part: SEAL — WORN (M/R GEARBOX) · airframe 11,860 hrs · 52,110 cycles

DURING DAILY AIRWORTHINESS CHECK, NOTICED EXCESSIVE NOISE & HORIZONTAL PLAY IN M/R MAST AT TRANSMISSION UPPER BEARING AREA WHEN SHAKING M/R BLADES. DURING INVESTIGATION OF THE MAST AFTER REMOVAL, EXCESSIVE WEAR WAS EVIDENT AT THE UPPER SEAL RUNNER & WEAR INDICATIONS IN THE UPPER TRANSMISSION BEARING ASSEMBLY. THIS ACFT REMAINS OUT OF SERVICE AT THE TIME OF THIS SUBMISSION AWAITING PARTS TO CORRECT THIS DISCREPANCY.

ATA 6520

Part: GEARBOX — MAKING METAL (TAIL ROTOR) · airframe 11,212 hrs · 49,108 cycles

ACFT RECEIVED A TAIL ROTOR GEARBOX CHIP LIGHT UPON DESCENT THAT COULD NOT BE CLEARED USING CHIP PULSE. A NORMAL LANDING WAS COMPLETED WITHOUT INCIDENT. UPON INSPECTION, FOUND TAIL ROTOR GREARBOX CHIP DETECTOR TO HAVE TWO LARGE OBJECTS OF DEBRIS ATTATCHED. AFTER REFERRING MM, FOUND DEBRIS SIZE AND SHAPE CATEGORY TO WARRANT GEARBOX REPLACEMENT DUE TO LIKELY GEAR WEAR. REPLACED GEARBOX ASSY ON ACFT WITH SERVICEABLE ASSY.

ATA 3397

Part: WIRE — SHORTED (SEARCH LIGHT)

PRIOR TO LIFTOFF WITH TRANSPORT TEAM THE PILOT DETECTED AN ACRID ODOR IN COCKPIT. THE PILOT THOUGHT THIS WAS ENVIRONMENTAL IN NATURE AND ODOR DISSIPATED WITHIN 10 SECONDS. THE PILOT COMPLETED THE FLIGHT WITHOUT INCIDENT. THE PILOT NOTICED THE SEARCHLIGHT INOPERATIVE. UPON TROUBLESHOOTING, I REALIZED THE ODOR MAY HAVE COME FROM RECENT WORK ON COLLECTIVE HEAD/SEARCH LIGHT SWITCH. MX WAS ABLE TO IDENTIFY BURNED WIRES ON THE SEARCHLIGHT WIRING BUNDLE AS THE SOURCE OF THE ODOR. THE WIRES ON THE SEARCHLIGHT SHORTED ON A CLAMP HOLDING PITOT TUBE ACCUMULATOR IN PLACE. WIRES WERE BURNED AND INSULATION MELTED. A SERVICEABLE SEARCHLIGHT FROM ANOTHER ACFT WAS USED AND THE ORIGINAL WIRE HARNESS WAS REPAIRED AND REUSED. N990SL HARNESS WAS DIFFERENT SIZE CONNECTOR. ACFT HAS BEEN TEST FLOWN AFTER REPAIR, NO SMOKE ODORS OR OTHER DEFECTS WERE NOTED.

ATA 6720

Part: TAIL ROTOR — MALFUNCTIONED · airframe 8,152 hrs · 36,241 cycles

WHILE LANDING AT A HOSPITAL PAD THE AIRCRAFT NOSE TUCKED LT AND BEGAN A UNCOMMANDED RT ROTATION. POWER WAS APPLIED TO CRUISE TORQUE 60 PERCENT AND WAS FLOWN INTO THE RT ROTATION AND BACK TO CRUISE FLIGHT. APPROACH TO HOSPITAL WAS TERMINATED AND DECIDED TO FLY TO 1H2 AIRPORT AND PERFORM A RUN ON LANDING. WHILE ENROUTE TO AIRPORT, TESTED T/R PEDALS AND AIRCRAFT DID NOT RESPOND TO THE INPUTS. WHILE APPROACH TO LANDING THE AIRCRAFT BEGAN A LT LEAN. RUN ON LANDING WAS ACCOMPLISHED JUST ABOVE ETL WITHOUT INCIDENT.