N69SC

Part: EXHAUST VALVE — DAMAGED (NR 4 CYLINDER) · airframe 32,529 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: EXHAUST VALVE — DAMAGED (NR 6 CYLINDER) · airframe 34,253 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: EXHAUST VALVE — DAMAGED (NR 3 CYLINDER) · airframe 32,371 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION, EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: EXHAUST VALVE — DAMAGED (NR 1 CYLINDER) · airframe 32,371 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: WIRE — DEFECTIVE (CABIN) · airframe 31,871 hrs · 32,996 cycles

PILOT REPORTED SMOKE IN COCKPIT. PANEL IN FRONT OF EMER EXIT WINDOW WAS GLOWING RED. CORRECTED NON-STANDARD WIRING, BETWEEN THE CLOCK CIRCUIT & THE CABIN LIGHT CB. NO FURTHER DEFECTS NOTED.

Part: BEAM — CRACKED (RT NACELLE) · airframe 31,592 hrs

DURING SCHEDULED INSPECTION, THE LWR U CHANNEL OF RT NACELLE CROSSOVER BEAM, 5654104-12, WAS FOUND TO BE CRACKED, TRANSVERSE TO LENGTH OF CHANNEL THROUGH EACH RADIUS. CORRECTIVE ACTION WILL BE A COMPLETE REPLACEMENT OF BEAM, FOLLOWING A DETAILED INSPECTION OF SURROUNDING STRUCTURE. A SUPPLEMENT ILLUSTRATING DAMAGE AREA WILL BE SUBMITTED.

Part: TURBOCHARGER — FAILED (RT ENGINE) · airframe 30,173 hrs · 29,141 cycles

RIGHT ENGINE STEADY, LOSS OF MAP IN CRUISE WITH CORRESPONDING DECREASE IN OIL PRESSURE. ELECTED TO SHUTDOWN AND SECURE RT ENGINE IN FLIGHT AND MADE AN UNSCHEDULED LANDING. DURING INSPECTION, RT ENGINE TURBOCHARGER FOUND TO BE AT FAULT. REPLACED RT TURBOCHARGER, VISUALLY INSPECTED ENGINE AND COMPONENTS FOR ADDITIONAL DEFECTS, AND GROUND RUN ACFT TO VERIFY ENGINE PRODUCES RATED MAP AND DOES NOT LEAK OIL.

Part: DRAG BRACE — CRACKED (NLG) · airframe 2,202 hrs

AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5 WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE BEYOND LIMIT ALLOWABLE OF MEB91-11R1. THIS UNIT HAS BEEN SCRAPPED & A REPLACEMENT DRAG BRACE HAS BEEN INSTALLED IN ACFT.

Part: NUT — CRACKED (NR 3 CYLINDER) · airframe 28,004 hrs

RIGHT ENGINE NR 3 CYLINDER HAS ONE CRACKED HOLD DOWN NUT.

Part: DRAG BRACE — CRACKED (NLG) · airframe 27,225 hrs

AT SCHEDULED INSPECTION, NLG DRAG BRACE, OEM PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE OUTLINED IN MEB941-11R1 & RETURNED TO SERVICE.

Part: SWITCH — BURNED (INSTRUMENT LIGHT) · airframe 27,268 hrs

CREW REPORTED ODOR IN COCKPIT. INTIALLY SUSPECTED HEATER, BUT ODOR REMAINED AFTER HEATER WAS TURNED OFF. CREW NOTICED SMOKE COMING FROM INSTRUMENT PANEL LIGHTING SWITCH. TURNED OFF SWITCH, SMOKE STOPPED, LANDED WITHOUT INCIDENT. MX R & R INSTRUMENT PANEL DIMMER ASSY. ACFT RELEASED BACK TO SERVICE.

Part: AXLE — CRACKED (MLG) · airframe 26,913 hrs

UPON TAXING INTO POSITION TO HOLD FOR TAKEOFF,CREW REPORTED EXPERIENCING TAXIING/ BRAKING DIFFICULTIES. MX FOUND RT MAIN GEAR LOWER BARREL AND AXLE ASSY CRACKED. MX R & R RT MAIN GEAR LOWER BARREL AND AXLE ASSY. ACFT RETURNED TO SERVICE.

Part: SIGHT TUBE — UNSERVICEABLE (HYD RESERVOIR) · airframe 26,372 hrs

CREW REPORTED, DURING CRUISE CONFIGURATION, HYDRAULIC PRESSURE LIGHT ILLUMINATED, FOLLOWED BY WHAT APPEARED TO BE SMOKE COMING FROM UNDER THE INSTRUMENT PANEL. FOLLOWED CHECKLIST TO ALLEVIATE SMOKE FROM CABIN. DIVERTED TO CLOSEST AIRPORT. LANDED WITHOUT INCIDENT. MX INSPECTED ACFT, FOUND HYD RESERVOIR SIGHT TUBE RUPTURED, AND RESERVOIR EMPTY. NO EVIDENCE OF SMOKE OR FIRE WAS FOUND. WHAT WAS THOUGHT TO BE SMOKE BY THE CREW WAS ATOMIZED HYD FLUID FROM RUPTURED SIGHT TUBE. MX REMOVED AND REPLACED SIGHT TUBE, SERVICED RESERVOIR, AND RELEASED ACFT BACK TO SERVICE.

Part: MASTER SWITCH — UNSERVICEABLE (ELECTRICAL) · airframe 26,242 hrs

PREFLIGHT, CREW REPORTED AVIONICS MASTER SWITCH INOPERATIVE. MX REMOVED AND REPLACED CIRCUIT BREAKER SWITCH. SYS CHECKS OK. ACFT RELEASED BACK TO SERVICE.

Part: SELECTOR VALVE — DAMAGED (LT WING FUEL)

AT CLIMB POWER-RT FUEL FLOW DROPPED TO 90 PPH. AUX PUMP ON LOW FIXED PROBLEM TEMPORARILY. FUEL FLOW DROPPED AGAIN AND LT ENGINE SURGE. RETURNED TO DEPARTURE AIRPORT AND LANDING WITHOUT INCIDENT. MX REMOVED AND REPLACED LT FUEL SELECTOR VALVE. ALSO REPLACED AUX FUEL PUMP AND CROSSFEED VALVE AS A PRECAUTIONARY MEASURE. (A)

Part: CYLINDER — FAILED (NR 6) · airframe 23,072 hrs

LEFT ENGINE FAILURE WITH CASE PENETRATION BELIEVED TO BE CAUSED BY A VALVE FAILURE AT THE NR 6 CYLINDER. A TCM ENGINEER WAS ON HAND AT THE TIME AND THE ENGINE HAS BEEN SENT TO TCM FOR TEARDOWN. LEFT ENGINE WAS REMOVED AND REPLACED AS A CORRECTIVE ACTION ON 6/13/2007.

Part: CIRCUIT BREAKER — FAILED (COCKPIT)

CREW REPORTED AVIONICS MASTER SWITCH INOP. MX CHANGED CIRCUIT BREAKER SWITCH.

Part: FMU — FAILED (RT ENGINE)

RT ENGINE FAILED TO SHUT OFF IN IDLE CUT OFF. REMOVED AND REPLACED FUEL METERING UNIT AND RELEASED AIRCRAFT BACK TO SERVICE.

Part: DRAG BRACE — CRACKED (NOSE GEAR)

ON PRE-FLIGHT, CREW FOUND SUSPECTED CRACK AT DRAG BRACE TO ACTUATOR ATTACH LUG AREA. MAINTENANCE PERFORMED NDT. FOUND TO BE CRACKED AT SUSPECTED AREA. REMOVED AND REPLACED DRAG BRACE AND ROD END (PN ADNE4JW) WITH NEW AND RETURNED AIRCRAFT TO SERVICE. (X)

Part: ACTUATOR ASSY — FAILED (ELEV PITCH SYST)

MHH/FLL - FLT 446 - AFTER TAKEOFF, THE AIRCRAFT EXPERIENCED A PITCH UP, PITCH DOWN, AND SEVERE VIBRATION. THE AIRCRAFT DIVERTED TO FPO AND LANDED WITHOUT INCIDENT. MAINTENANCE WAS DISPATCHED TO FPO TO REMOVE AND REPLACE THE ELEVATOR PITCH TRIM ACTUATOR. THE ROLL PINS (2) HAD VIBRATED OUT OF THE ELEVATOR PITCH TRIM ACTUATOR.