N57PB

Part: CRANKCASE — FAILED (LT ENGINE) · airframe 27,283 hrs · 51,351 cycles

PILOT REPORTED STEADILY DECREASING OIL PRESSURE AT LT ENGINE. CREW INTENTIONALLY CAGED LT ENGINE WHEN ‘MECHANICAL’ NOISES WERE HEARD AND SAFELY LANDED. INITIAL INSPECTION FOUND MULTIPLE CRANKCASE BREACHES AND INDICATIONS OF POSSIBLE OIL STARVATION. ADDITIONAL DETAILS WILL BE AVAILABLE UPON ENGINE TEARDOWN INSPECTION.

Part: LATCH — FAILED (LOCKER DOOR) · airframe 26,759 hrs

PILOT REPORTED LEFT WING LOCKER DOOR OPENED DURING TAKE OFF. MAINTENANCE INSPECTED AND FOUND THE LEFT WING LOCKER LATCH NEEDED ADJUSTMENT. ADJUSTED AS NEEDED WITH NO FURTHER DEFECTS.

Part: CIRCUIT BREAKER — FAILED (AVIONICS BUSS) · airframe 25,031 hrs · 48,533 cycles

PILOT REPORTED THE AVIONICS SWITCH BREAKER TRIPPED IN FLIGHT. MAINTENANCE REMOVED A REPLACED THE AVIONICS BUSS CIRCUIT BREAKER AND OPERATIONALLY CHECKED OK WITH NO FURTHER ISSUES.

Part: BEAM — CRACKED (RT NACELLE) · airframe 24,596 hrs

THE RIGHT NACELLE CROSSOVER BEAM ASSEMBLY WAS FOUND TO BE CRACKED AT AFT FACE IN THE AREA OF TURBOCHARGER MOUNT BRACKET HOLE LOCATIONS DURING DURING DISASSEMBLY OF TURBO CHARGER ASSEMBLY TO FACILITATE OTHER MAINTENANCE. CRACK LOCATED ADJACENT TO OB MOST TURBOCHARGER BRACKET HOLE LOCATION. CORRECTIVE ACTION WILL BE TO REMOVE CROSSOVER BEAN ASSEMBLY, PERFORM DETAILED VISUAL INSPECTION OF SURROUNDING STRUCTURE AND INSTALL NEW BEAM ASSEMBLY.

Part: EXHAUST VALVE — DAMAGED (NR 2 CYLINDER) · airframe 24,176 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 2 CYLINDER) · airframe 23,990 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 5 CYLINDER) · airframe 23,990 hrs

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

Part: LOCK NUT — DISCONNECTED (PROP CONTROL) · airframe 23,691 hrs · 46,674 cycles

RIGHT PROP CONTROL LEVER, WILL NOT CHANGE PROP PITCH. INSPECTED & FOUND RIGHT PROP CONTROL CABLE DISCONNECTED FROM PROP GOVERNOR. REPLACED RT PROP CABLE ROD END BOLT & NUT WITH NEW IAW MM CH 61-20-00 & 20-10-01.

Part: SWITCH — OUT OF ADJUST (CABIN HEAT) · airframe 23,171 hrs · 45,964 cycles

PILOT REPORTED BURNING SMELL, NOTED WITH CABIN HEATER SWITCH ON. INSPECTED & OPERATIONS CHECKED HEATER OPERATIONS. FOUND DUCT THERMOSTAT SWITCH OUT OF ADJUSTMENT, RUNNING TOO HOT, ADJUSTED SWITCH TO WITHIN LIMITS. OPERATIONS CHECKED GOOD.

Part: UNKNOWN — SMOKE (COCKPIT) · airframe 22,964 hrs · 45,681 cycles

PILOT REPORTED BURNING INSULATION SMELL IN COCKPIT. INSPECTED LT SIDE CONSOLE, CB PANEL, BEHIND INSTRUMENT PANEL, FOUND NO SIGN OF OVERHEATED OR BURNT WIRES & NO POPPED CB.

Part: WIRE — BROKEN (NLG ACTUATOR) · airframe 22,803 hrs · 45,425 cycles

PILOT REPORTED THE NOSE GEAR WOULD NOT INDICATE DOWN DURING NORMAL OR EMER EXTENSION. INSPECTED NOSE GEAR EXTENSION & RETRACTION SYS & FOUND NLG ACTUATOR GND WIRE BROKEN AT RING TERMINAL. ATTACHED NEW RING TERMINAL TO NLG ACTUATOR GND WIRE IAW 402C WDM CH 20-10-04. ROUTED & REATTACHED GND WIRE TO BULKHEAD IAW 402C WDM CH 20-10-02. PERFORMED LG FUNCTIONAL CHECK IAW 402C MM CH 32-00-00. OPERATIONALLY CHECKED GOOD AT THE TIME. SERVICED LG EMER BLOW DOWN BOTTLE IAW 402C MM CH 12-10-06.

Part: WEB — CRACKED

CRACKS FOUND FOR/AFT AREA PREVIOUSLY ADDRESSED IN MEB 84-12. REPAIR CONDUCTED IAW 8110-3 FAA APPROVED DATA, REF 135415A(14).

Part: DISTRIBUTOR GEAR — STRIPPED (MAGNETO)

ENROUTE LT ENGINE BEGAN TO RUN ROUGH, LANDED. RUN UP FOUND LT ENGINE MAGNETO ROUGH AND EXCESSIVE DROP. (SW01200603302) (K)

Part: BRACKET — CRACKED (AILERON)

CRACKED AT AILERON YOLK ATTACH POINTS.

Part: LINE — CRACKED (HYDRUALIC SYSTEM)

DURING A RETURN FLIGHT, LEFT AND RIGHT HYDRAULIC FLOW LIGHTS BEGAN TO FLICKER ON AND OFF. CYCLED GEAR DOWN AND MADE AN UNEVENTFUL LANDING. MAINTENANCE PERSONNEL FOUND HYDRAULIC RESERVOIR EMPTY. PERFORMED HYDRAULIC PRESSURE CHECK AND FOUND L-H PRESSURE LINE, FROM THE FLOW SWITCH TO ELBOW, CRACKED IN THE BEND OF THE RADIUS. REPLACED WITH SERVICEABLE LINE. PRESSURE CHECKED AND CYCLED GEAR WITH NO FURTHER LEAKS NOTED.

Part: WEB — CRACKED (RT TRUNNION)

DURING NOSE INSPECTION, FOUND CRACKS ON WEB ASSEMBLIES AROUND THE ATTACH BOLTS FOR THE NOSE GEAR TRUNNION BEARINGS. POSSIBLY, SIDE LOADS ON NOSE GEAR DUE TO IMPROPER GROUND HANDLING PROCEDURES.

Part: WEB — CRACKED (LT TRUNNION)

DURING NOSE INSPECTION, FOUND CRACKS ON WEB ASSEMBLIES AROUND THE ATTACH BOLTS FOR THE NOSE GEAR TRUNNION BEARINGS. POSSIBLY, SIDE LOADS ON NOSE GEAR DUE TO IMPROPER GROUND HANDLING PROCEDURES.