N711JH

Part: FUEL CONTROL — MALFUNCTIONED (ENGINE) · airframe 24,417 hrs · 30,113 cycles

AFTER DEPARTURE PILOT EXPERIENCED SLIGHT NG FLUCTUATION AND SLIGHT YAW MOTION. PILOT RETURNED FOR LANDING. DURING TROUBLE SHOOTING MAINTENANCE OF THE ENGINE FUEL CONTROL UNIT, MAINTENANCE FOUND INSIDE THE ACCELERATION CONTROLLER CHAMBER THAT THE LOWER CIRCLIP WAS MISSING FROM FROM A LEVER PIN AND A SPRING FROM THE PIN WAS DISENGAGED FROM THE PIN. FUEL CONTROL WAS REMOVED FROM ENGINE TO BE SENT TO REPAIR SHOP.

Part: MODULE — NOISY (ENGINE) · airframe 22,042 hrs · 26,342 cycles

DURING COAST DOWN AFTER POST INSPECTION GROUND RUNS MECHANICS HEARD A NOISE COMING FROM THE ENGINE MODULE 4 AND MODULE 5 AREA. TURBOMECA WAS CONTACTED AND HAS REQUESTED THAT THE MODULES BE SENT IN FOR ANALYSIS.

Part: GEARBOX — FALSE INDICATION (MAIN ROTOR) · airframe 19,406 hrs · 22,355 cycles

PILOT EXPERIENCED A MAIN ROTOR GEARBOX CHIP LIGHT ENROUTE TO THE AIRPORT. MAINTENANCE EXAMINED THE SYSTEM CHIP DETECTORS AND ELECTRICAL SYSTEM AND FOUND NO CHIP OR ABNOMALIES. AN OPERATIONAL TEST FLIGHT WAS PERFORMED AND FOUND SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: ENGINE — MAKING METAL (ZONE 200) · airframe 18,770 hrs · 21,470 cycles

PILOT REPORTED AN ENGINE CHIP LIGHT. MAINTENANCE FOUND A SMALL PIECE OF CARBON (LESS THAN.5MM) ON REAR BEARING CHIP PLUG. PERFORMED LEVEL "B" CHECKS IN REF TO ENGINE MANUAL. RETURNED AIRCRAFT TO SERVICE WITH CONDITION CHECKS.

Part: ENGINE — CONTAMINATED · airframe 16,217 hrs · 18,281 cycles

BETWEEN FLIGHTS WHILE ON GROUND AT FLIGHT IDLE, THE PILOT RECEIVED A ENGINE CHIP LIGHT. MAINTENANCE FOUND A 1.5 MM PIECE OF CARBON ON LOWER ELETRICAL ENGINE CHIP DETECTOR. MAINTENACE PERFORMED ENGINE OIL RINSE, REPLACEMENT, FILTER CHANGE AND GROUND RUNS. CHIP DETECTOR REMAINED CLEAN. ENGINE PLACED IN A 25 HOUR MONITORING CYCLE.

Part: SEAL — LEAKING (FUEL CONTROL) · airframe 15,133 hrs · 16,880 cycles

DURING PREFLIGHT CHECKS, PILOT TURNED ON FUEL BOOST PUMPS. NOTICE FUEL COMING FROM THE ENGINE DECK DRAINS. MAINTENANCE DETERMINED THAT THE ENGINE FUEL CONTROL GOVERNOR DRIVE FUEL SEAL WAS LEAKING. THE FUEL CONTROL UNIT WAS REPLACED.

Part: ENGINE — WARNING LIGHT · airframe 12,766 hrs · 14,076 cycles

PILOT HAD AN ENGINE CHIP LIGHT ILLUMINATION DURING FLIGHT. HE PERFORMED AN UNEVENTFUL UNSCHEDULED LANDING. MX FOUND A 1MM WIRE (FILIMENT) ON THE LOWER ENGINE ELECTRICAL DETECTOR. MX PERFORMED A DRAIN AND RINSE OF THE OIL SYS AND FOUND ALL PLUGS CLEAN AND RELEASED ACFT BACK INTO SERVICE.

Part: CONNECTOR — DIRTY (CHIP LIGHT) · airframe 12,506 hrs · 13,769 cycles

.3 HRS INTO HIS TOUR FLIGHT THE PILOT HAD AN ENGINE CHIP WARNING LIGHT. HE MADE AN UNEVENTFULL UNSCHEDULED LANDING. AT ARRIVAL MX FOUND NO CHIP LIGHT ENGINE OFF. MX FOUND (1) 1.5 MM FILAMENT LEVEL "A" ON THE UPPER ELECTRICAL PLUG ALL OTHER PLUGS WERE CLEAN. THE OIL SYS WAS DRAINED AND RINSED IAW THE MX INSTRUCTIONS AND NO FURTHER PARTICLES WERE DISCOVERED. THE ACFT WAS RETURNED TO SERVICE.

Part: MANIFOLD — COKED (GAS GENERATOR)

BEFORE THE FIRST FLIGHT OF THE DAY THE PILOT COULD NOT START ENGINE. INSPECTED ENGINE ASSY AND FOUND THE GAS GENERATOR LOCKED UP DUE TO COKING FROM THE FUEL INJECTION MANIFOLD. REMOVE THE ENGINE ASSY AND ASSIST TECH IN REPLACING THE FUEL INJECTION MANIFOLD. (K)

Part: MANIFOLD — COKED (FUEL INJECTION)

BEFORE THE FIRST FLIGHT OF THE DAY THE PILOT REPORTED THE GAS GENERATOR BARELY ROTATES DURING START. INSPECTED ENGINE ASSY AND FUND GAS GENERATOR COKING FROM FUEL INJECTION MANIFOLD. REMOVE ENGINE ASSY AND ASSIST TECH IN REPLACING THE FUEL INJECTION MANIFOLD. MFG HIGHLY RECOMMENDED TURBOLINE FUEL ADDITIVE. (K)

Part: MANIFOLD — MALFUNCTIONED (GAS GEN)

BEFORE THE FIRST FLIGHT OF THE DAY THE PILOT REPORTED THE GAS GENERATOR BARELY ROTATES DURING START. INSPECTED ENGINE ASSY AND FOUND GAS GENERATOR COKING FROM FUEL INJECTION MANIFOLD. REMOVE ENGINE ASSY AND ASSIST TECH IN REPLACING THE FUEL INJECTION MANIFOLD. MFG HIGHLY RECOMMENDED FUEL ADDITIVE. (K)

Part: MANIFOLD — COKED (ENGINE)

AFTER THE FOURTH FLIGHT OF THE DAY THE PILOT SHUT THE HELICOPTER DOWN. THE PILOT COULD NOT START THE ENGINE FOR ANOTHER FLIGHT. INSPECTED ENGINE ASSY AND THE GAS GENERATOR LOCKED UP DUE TO COKING FROM THE FUEL INJECTION MANIFLOD. REMOVE THE ENGINE ASSY AND ASSIST MFG SERVICE CENTER IN REPLACING THE FUEL INJECTION MANIFOLD. (K)

Part: MANIFOLD — MALFUNCTIONED (FUEL INJECTOR)

AFTER THE 4TH FLIGHT OF THE DAY THE PILOT SHUT THE HELICOPTER DOWN. THE PILOT COULD NOT START THE ENGINE FOR ANOTHER FLIGHT. INSPECTED ENGINE ASSY AND THE GAS GENERATOR LOCKED UP DUE TO COKING FROM THE FUEL INJECTION MANIFOLD. REMOVED THE ENGINE ASSY AND ASSIST MFG SERVICE CENTER IN REPLACING THE FUEL INJECTION MANIFOLD. (K)

Part: MANIFOLD — COKED (GAS GEN)

DURING A 500 HR (T-INSPECTION), COULD NOT SPIN COMPRESSOR DISK, DUE TO GAS GENERATOR INJECTION MANIFOLD COKING. MFG TECH REMOVED AND REPLACED INJECTION MANIFOLD ON MODULE NR 3. (K)