N6879R

Part: ENGINE — MAKING METAL (LEFT) · airframe 37,373 hrs · 35,228 cycles

THE PILOT REPORTED THE LEFT ENGINE HAD A LOSS OF POWER IN AND THE OIL PRESSURE FELL TO ZERO. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES IN THE OIL FILTER. AN ENGINE HAS BEEN ORDERED TO REPLACE THIS ENGINE. FURTHER DETAILS ARE TO BE PROVIDED UPON ENGINE TEARDOWN INVESTIGATION.

Part: DISPLAY — FAILED (WEATHER RADAR) · airframe 36,306 hrs

PILOT SMELLED SOMETHING BURNING AFTER TURNING WEATHER RADAR ON. SMALL WHIFF OF SMOKE FROM BEHIND INSTRUMENT PANEL WHICH WENT AWAY, BUT SMELL PERSISTED. WEATHER RADAR DISPLAY DOES NOT WORK. MAINTENANCE INSPECTED FOR BURNT WIRES AND COULD NOT FIND DEFECT, SYSTEM WAS PLACED ON ME-, DETERMINED TO BE A FAILED WEATHER RADAR DISPLAY.

Part: FITTING — CRACKED (LT NACELLE) · airframe 35,960 hrs · 33,075 cycles

DURING A ROUTINE INSPECTION, A CRACK WAS IDENTIFIED ON THE INBOARD LEG OF THE LEFT HAND OUTBOARD FITTING (P/N 5292029-23.) THIS CRACK MEASURES APPROXIMATELY .100, AND WAS DISCOVERED USING THE LIGHTED BORESCOPE INSPECTION PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02R2 TO SATISFY AS2017-10-19. THIS CRACK IS CONSISTENT WITH OTHERS THAT HAVE BEEN IDENTIFIED USING THE SAME INSPECTION PROCEDURE. THIS FITTING WILL BE REPLACED WITH FACTORY NEW PARTS.

Part: EXHAUST VALVE — DAMAGED (NR 4 CYLINDER) · airframe 35,638 hrs

DURING INSPECTION THE #4 CYLINDER OF THE LEFT ENGINE WAS FOUND TO HAVE LOW COMPRESSION. UPON FURTHER INSPECTION THE EXHAUST VALVE HAD FOUR SMALL CHIPS IN THE EDGE OF THE VALVE, AND THE EXHAUST VALVE SPRING HAD PIECES THAT HAD COME APART. NO DAMAGE TO THE ROCKER ARM OR PISTON FACE WAS NOTICED. ADJACENT CYLINDERS (2&6) DID NOT SHOW ANY SIGNS OF DAMAGE.

Part: UNKNOWN — MALFUNCTIONED (RUDDER TRIM) · airframe 35,482 hrs

PILOT REPORTED RUDDER TRIM JAMMED IN FLIGHT. MAINTENANCE INSPECTED AND WAS NOT ABLE TO DUPLICATE THE DISCREPANCY ON THE GROUND. MAINTENANCE INSPECTED RUDDER TRIM SYSTEM CHAIN, CABLE, BLOCKS, LUBED RUDDER TRIM ACTUATOR SCREW ASSEMBLY AS PRECAUTIONARY MEASURES AND RETURNED THE AIRCRAFT TO SERVICE WITH NO FURTHER DISCREPANCY.

Part: CYLINDER — LEAKING (RT ENGINE) · airframe 35,426 hrs

PILOT REPORTED SHAKING FELT IN AIRFRAME DURING CLIMB/CRUISE WITH NO ABNORMAL ENGINE INDICATIONS ON INSTRUMENTATION. MAINTENANCE INSPECTED AND FOUND THE RIGHT ENGINE #6 CYLINDER TO HAVE LOW COMPRESSION. THE CYLINDER WAS REPLACED ALONG WITH THE RIGHT MAGNETO AND IGNITION CABLES WITH NO FURTHER DEFECTS NOTED.

Part: CYLINDER — LEAKING (ENGINE) · airframe 35,426 hrs · 32,296 cycles

PILOT REPORTED A SHAKING FELT IN AIRFRAME DURING CLIMB AND CRUISE. MAINTENANCE INSPECTED AND FOUND THE #6 CYLINDER OF THE LEFT ENGINE TO HAVE LOW COMPRESSION. THE LEFT ENGINE RIGHT MAGNETO WAS FOUND TO HAVE INTERNAL OIL AND THE #1 CYLINDER IGNITION CABLE WAS FOUND TO BE INOPERATIVE. THE RIGHT MAGNETO, #1 IGNITION LEAD AND #6 CYLINDER WERE REPLACED.

Part: MOUNT BOLT — MISSING (RT STARTER) · airframe 35,380 hrs

PILOT REPORTED OIL LEAK IN FLIGHT AND OIL PRESSURE DECREASING ON THE RIGHT ENGINE. UPON INSPECTION MAINTENANCE DISCOVERED ONE STARTER MOUNT BOLT NUT MISSING. STARTER HAD BEEN REMOVED FOR OTHER MAINTENANCE 99.5 HOURS PRIOR. AIRCRAFT HAD GONE THROUGH ROUTINE INSPECTION 38.1 HOURS PRIOR. STARTER AND ADAPTER WERE REPLACED WITH NO FURTHER LEAKS NOTED.

Part: ENGINE — MAKING METAL (LEFT) · airframe 34,941 hrs

PILOT REPORTED THE LEFT ENGINE OIL PRESSURE DROPPED TO BOTTOM OF GREEN ARC DURING CRUISE. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES IN OIL SYSTEM. THE ENGINE HAS BEEN REPLACED.

Part: EXHAUST VALVE — DAMAGED (NR 3 CYLINDER) · airframe 33,370 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 4 CYLINDER) · airframe 33,180 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 1 CYLINDER) · airframe 33,116 hrs

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

Part: DIMMER — FAILED (COCKPIT) · airframe 33,041 hrs · 29,584 cycles

PILOT REPORTED SMOKE PRESENT IN FRONT OF THROTTLES, COMING OUT OF THE SIDE OF THE CONSOLE DIMMER SWITCH. MAINTENANCE INSPECTED DIMMER ASSEMBLY AND ASSOCIATED WIRING. FOUND FAILED CIRCUIT IN DIMMER ASSEMBLY. REMOVED AND REPLACED DIMMER ASSEMBLY.

Part: LINK — BROKEN (GEAR DOOR) · airframe 32,619 hrs · 29,227 cycles

PILOT REPORTED GEAR DOOR RIPPED OFF UPON EXTENSION. THE DOOR LINK WAS FOUND BROKEN AT THE ADJUSTMENT NUT ON THE DOOR SIDE. REMOVED THE REMAINDER OF GEAR DOOR & INSTALLED REPLACEMENT DOOR.

Part: DRAG BRACE — CRACKED (NLG) · airframe 29,860 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 BEYOND LIMIT ALLOWABLE. THIS UNIT HAS BEEN SCRAPPED & A REPLACEMENT DRAG BRACE HAS BEEN INSTALLED IN ACFT.

Part: DRAG BRACE — CRACKED (NLG) · airframe 26,876 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: IGNITION UNIT — SHORTED (COMBUSTION HEAT) · airframe 26,837 hrs

CREW REPORTED, CABIN HEATER INOPERATIVE DURING FLIGHT. 20 MINUTES PRIOR TO REACHING FINAL DESTINATION, CREW REPORTED ODOR OF SOMETHING MELTING OR SMOLDERING. HEATER WAS TURNED OFF, AND HEATER FUEL SOURCE WAS TURNED OFF ALSO. AFTER A FEW MINUTES, ODOR WENT AWAY. LANDING WAS UNEVENTFUL MX INSPECTED HEATER AND FOUND HEATER IGNITION UNIT FAILED AND SHORTED. MX R & R HEATER IGNITION UNIT, SYS CHECKED NORMAL. ACFT RELEASED BACK TO SERVICE.

Part: DEICE SYSTEM — MALFUNCTIONED (STAB BOOTS) · airframe 26,773 hrs

CREW REPORTED, AT CRUISE ALTITUDE, ACFT BEGAN ENCOUNTERING ICING CONDITIONS. WING AND STABILIZER DEICE BOOTS FAILED TO REMOVE ICE. CREW REPORTED SURFACE DEICE SYS AS INOPERATIVE ALTHOUGH SYS HAD CHECKED NORMAL EARLIER IN THE DAY. SEVERAL ATTEMPTS AT CHANGING ALTITUDE TO GET CLEAR OF ICING CONDITIONS FAILED. CREW REQUESTED DIVERSION, WHERE CONDITIONS WERE REPORTED TO BE BETTER. ON DESCENT, SURFACE DEICE SYS BEGAN WORKING AND ICE WAS SHED FROM WINGS AND STABILIZERS. CONTINUED APPROACH AND LANDED WITHOUT INCIDENT. MX INSPECTED SURFACE DEICE SYS, AND PERFORMED SEVERAL SYS CHECKS, BUT COULD NOT DUPLICATE FAILURE. AS A PRECAUTIONARY MEASURE, MX R & R RT STUB WING BOOT (SEVERAL PATCHES), VERTICAL STABILIZER BOOT (SEVERAL PATCHES), SURFACE DEICE SWITCH AND DEICE TIMER.

Part: EXHAUST VALVE — FAILED (ZONE 400) · airframe 26,708 hrs

CREW REPORTED, DURING INITIAL CLIMB OUT, EXPERIENCED PARTIAL POWER LOSS ON RT ENG, CONSISTENT WITH LOSS OF TURBOCHARGER. CONTINUED CLIMB OUT AT FULL POWER TO CRUISE SETTING AT 7000 FT WHILE DECLARING AN EMERGENCY AND REQUESTING DIVERSION. EXPERIENCED OIL LEAK FROM RT COWLING ENROUTE, LOST ALL OIL PRESSURE ON RT ENGINE, AND PERFORMED PRECAUTIONARY SHUTDOWN. CONTINUED ENROUTE AND LANDED WITHOUT INCIDENT. MX INSPECTED RT ENGINE, AND FOUND TURBOCHARGER FAILED ALONG WITH OIL PRESSURE FEED LINE FRACTURED. R & R TURBOCHARGER, OIL FEED LINE, AND AS A PRECAUTIONARY MEASURE, R & R RT ENGINE. FURTHER INSP REVEALED NR4 CYLINDER EXHAUST VALVE HAD FAILED. DEBRIS FROM THE FAILED VALVE HAD TRAVELED THROUGH THE EXHAUST SYS, DAMAGING THE TURBOCHARGER. ABRUPT STOPPAGE OF THE TURBOCHARGER CAUSED THE COMPRESSOR PARTING HALF CLAMP TO FAIL, FRACTURING THE TURBOCHARGER OIL PRESSURE FEED LINE. AFTER THE ENGINE AND TURBOCHARGER WERE CHANGED, THE AIRCRAFT WAS RELEASED BACK TO SERVICE.

Part: SWITCH — UNSERVICEABLE (CONTROL PEDESTAL) · airframe 24,269 hrs · 60,600 cycles

CREW REPORTED ELECTRICAL ODOR PRESENT WHEN INSTRUMENT LIGHT MASTER SWITCH TURNED ON. TURNED SWITCH OFF ODOR WENT AWAY. REMOVED AND REPLACED INTRUMENT LIGHTING MASTER SWITCH.

Part: AXLE — BROKEN (RT MLG) · airframe 23,456 hrs · 70,000 cycles

RIGHT MAIN GEAR AXLE BROKE ON TAXI IN.

Part: AXLE — BROKEN (ZONE 900) · airframe 23,456 hrs · 70,000 cycles

RIGHT MAIN GEAR AXLE BROKE ON TAXI IN.

Part: ENGINE — FAILED (NR 1) · airframe 22,774 hrs · 13,817 cycles

DURING CRUISE FLIGHT NR 1 ENGINE VIBRATED THEN LOST POWER, ENGINE WAS SHUT DOWN. LEFT ENG HAD A INTERNAL FAILURE, ENG WAS REMOVED AND REPLACED. AIRCRAFT RETURNED TO SERVICE. FAILED ENG HAS BEEN SENT TO MANUFACTURE FOR TEARDOWN AND INVESTIGATION.

Part: CIRCUIT BREAKER — DEFECTIVE (AVIONICS)

CREW REPORTED AVIONICS MASTER INOP. MX CHANGED CIRCUIT BREAKER.

Part: MASTER SWITCH — FAILED (LT SWITCH PANEL)

ON PRE-FLIGHT INSPECTION, AVIONIC MASTER SWITCH FAILED. MAINTENANCE REPLACED SWITCH AND RETURNED AIRCRAFT TO SERVICE.

Part: MASTER SWITCH — FAILED (INST PANEL)

ON PREFLIGHT INSPECTION AVIONIC MASTER SWITCH FAILED. MAINTENANCE REPLACED SWITCH AND RETURNED AIRCRAFT TO SERVICE.(K)

Part: CASE — DAMAGED (ENGINE)

AIRCRAFT WAS AT CRUISE ALTITUDE, WHEN THE RIGHT ENGINE SHUTTERED, FOLLOWED BY A BANG AND LOSS OF POWER. CREW SECURED THE ENGINE AND LANDED WITHOUT INCIDENT. MECHANIC DETERMINED THE ENGINE EXPERIENCED AN INTERNAL FAILURE, RESULTING IN 2 ONE INCH HOLES IN THE CASE HALVES OPPOSITE EACH OTHER IN THE AREA OF THE CAMSHAFT FOLLOWERS/LIFTERS AT THE NR 6 AND NR 5 CYLINDER POSITIONS.

Part: FUSE — BLOWN (COCKPIT)

CREW NOTICED SMELL OF SMOKE, LEFT ALTERNATOR OUT LIGHT ILLUMINATED, FOUND LEFT ALTERNATOR FIELD FUSE BLOWN. MECHANIC REPLACED FUSE, INSPECTED ALTERNATOR WIRING, ALTERNATOR, VOLTAGE REGULATORS. NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.

Part: UPLOCK HOOK — FAILED (LT MLG)

THE LT MAIN GEAR UPLOCK HOOK FAILED ON RETRACTION. FAILURE OCCURRED ACROSS THE UPLOCK HOOK BOSS SEPARATING THE UPLOCK ACTUATOR FROM THE HOOK PORTION OF THE UPLOCK ASSY CAUSING THE GEAR TO REMAIN LOCKED IN WHEEL WELL UPON EXTENSION. EMERGENCY PROCEDURES FAILED TO RELEASE THE GEAR AND THE CREW WAS FORCED TO LAND WITH ONLY THE NOSE AND RT MAIN EXTENDED. MINIMAL DAMAGE SUSTAINED TO THE ACFT. SUBMITTER SUGGESTED BETTER MACHINING AROUND CUT-OUT FOR SWITCH. CYCLES: 4,300.