N764EA

Part: SPAR CAP — CRACKED (RT WING) · airframe 33,685 hrs · 36,655 cycles

DURING A ROUTINE INSPECTION, A CRACK WAS VISUALLY IDENTIFIED ON THE RIGHT HAND FORWARD UPPER SPAR CAP. THERE ARE NO OTHER DEFECTS NOTED IN THIS AREA, THIS INCLUDES NO LOOSE OR MISSING FASTENERS. THE CRACK IN THE SPAR CAP WAS CONFIRMED BY SURFACE EDDY CURRENT INSPECTION. THE CRACK IS LOCATED ON THE FORWARD RADIUS BETWEEN THE VERTICAL AND HORIZONTAL FLANGES. THE LENGTH OF THE CRACK IS 1.150, AND IS LOCATED AT APPROXIMATE RIGHT WING STATION 69.00. THE CAP WITH BE REPLACED WITH A FACTORY NEW PART.

Part: SPAR CAP — CRACKED (ZONE 100) · airframe 33,471 hrs · 36,234 cycles

A CRACK WAS IDENTIFIED AT THE RT SIDE OF LWR FWD CARRYTHROUGH SPAR CAP AFT MOST IB FASTENER LOCATION WHILE PERFORMING NDT PROCEDURE AS AMOC FOR AD2018-03-03R1. THE CRACK WAS CONFIRMED WITH BOLT HOLE EDDY CURRENT AFTER THE FASTENER WAS REMOVED. CRACK DIRECTION IS AFT AND MEASURES APPROXIMATELY 0.25". THE WING JOINT FITTING ASSOCIATED WITH THESE FASTENER LOCATIONS WAS REPLACED WITH AN OEM PART AND HAS ACCUMULATED 2281.6 HOURS SINCE INSTALLATION.

Part: AXLE — CRACKED (MLG) · airframe 32,843 hrs · 34,925 cycles

DURING TAXI FOR DEPARTURE, THE CREW REPORTED THE AIRCRAFT PULLED TO THE RIGHT AS IF THE TIRE HAD GONE FLAT. THE AIRCRAFT BECAME DISABLED ON THE TAXIWAY. THE RT AXLE ASSEMBLY HAD FAILED CAUSING THE WHEEL ASSEMBLY TO RUB AGAINST THE RT LANDING GEAR STRUT. UPON REMOVAL OF THE RT WHEEL ASSEMBLY THE AXLE WAS FOUND TO BE CRACKED ALMOST IN HALF. THE CRACK BEGINS AT THE LOWER SECTION OF THE AXLE AND IS LOCATED IN BETWEEN THE BEARING SECTIONS OF WHERE THE WHEEL ASSEMBLY WOULD BE MOUNTED. A PICTURE OF THE FAILURE WILL BE SUBMITTED. THIS OPERATOR HAS EXPERIENCED CRACKED AXLE ASSEMBLIES PREVIOUSLY BUT NEVER IN THIS LOCATION. THESE PARTS ARE LIFE LIMITED AT 22500 CYCLES AND THIS FAILURE IS VERY PREMATURE. AN SDR WILL ALSO BE SUBMITTED TO THE OEM WITH A REQUEST TO ANALYZE THE FAILED PART.

Part: DISPLAY — FAILED (COCKPIT) · airframe 31,651 hrs · 32,162 cycles

PILOT REPORTED A BURNING SMELL IN CABIN, AND RADAR WENT OFF. THE CABIN CIRCUIT BREAKER WAS THEN PULLED. MAINTENANCE INSPECTED AND REPLACED THE WEATHER RADAR DISPLAY WITH NO FURTHER DEFECTS NOTED.

Part: PISTON RING — BROKEN (NR 2 CYLINDER) · airframe 31,468 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. INSPECTION FOUND A BROKEN PISTON RING.

Part: EXHAUST VALVE — DAMAGED (NR 6 CYLINDER) · airframe 31,468 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 5 CYLINDER) · airframe 31,468 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 1 CYLINDER) · airframe 31,468 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 1 CYLINDER) · airframe 31,468 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 5 CLYINDER) · airframe 31,306 hrs

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

Part: EXHAUST VALVE — DAMAGED (NR 5 CYLINDER) · airframe 31,248 hrs

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

Part: BEAM — CRACKED (LT NACELLE) · airframe 30,795 hrs

THE LT NACELLE OTBD ENG BEAM WAS FOUND TO BE CRACKED JUST FWD OF AFT ENG MOUNT, TRANSVERSE TO LENGTH OF BEAM, ACROSS UPPER FACE OF BEAM, DURING NDT PRESCRIBED WITHIN MEL-54-01. REMOVE BEAM ASSEMBLY FROM NACELLE, PERFORM DETAILED VISUAL INSPECTION OF SURROUNDING STRUCTURE & INSTALL NEW BEAM ASSEMBLY. A SUPPLEMENT TO THIS SDR WILL BE SUBMITTED ILLUSTRATING RESULT OF X-RAY INSPECTION.

Part: DIMMER — MALFUNCTIONED (COCKPIT) · airframe 29,590 hrs · 28,297 cycles

SHUT DOWN ENGS & EVACUATED ACFT AFTER DETECTING SMOKE COMING FROM THROTTLE QUADRANT AREA DURING TAXI TO RUNWAY 08. VISUAL INSPECTION OF INSTRUMENT PANEL LIGHT DIMMER ASSEMBLY & FOUND A FAILED RESISTOR INTEGRAL TO ASSEMBLY. REMOVED AFFECTED ASSEMBLY & INSTALLED SERVICEABLE DIMMER ASSEMBLY.

Part: WIRE — CHAFED (ZONE 100) · airframe 29,071 hrs

PILOT REPORTED THAT DURING CRUISE, SMOKE WAS NOTICED IN THE COCKPIT. AS A PRECAUTION THE PILOT ELECTED TO DEACTIVATE ELECTRICAL SYSTEMS AFTER DECLARING AN EMERGENCY. SAFELY LANDED AT DESTINATION. UPON MX INSPECTION, A WIRE WAS FOUND TO HAVE BEEN CHAFED BETWEEN THE NAV LIGHT SWITCH AND CONNECTOR IN THE PILOT SIDE CONSOLE AND MELTED WITH WIRING INSULATION. THIS SECTION OF WIRING WAS REPLACED AND THE NAV LIGHT SWITCH WAS REPLACED AS WELL AS A PRECAUTIONARY MEASURE.

Part: DRAG BRACE — CRACKED (NLG) · airframe 26,926 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: CONTROL CABLE — BROKEN (TE FLAPS) · airframe 26,343 hrs

ON FINAL DECENT, CREW REPORTED FLAP MALFUNCTION ( SPLIT FLAPS ). PILOT DECLARED AN EMERGENCY, LANDING WAS UNEVENTFUL. MX FOUND (1) OF (2) FLAP EXTEND CABLES BROKEN. MX R & R BOTH EXTEND AND RETRACT CABLES.

Part: SWITCH — UNSERVICEABLE (MASTER) · airframe 25,154 hrs

CREW REPORTED AVIONICS MASTER SWITCH INOP. MAINTENANCE REMOVED AND REPLACED SWITCH.

Part: CONNECTING ROD — UNSERVICEABLE (LT ENGINE)

AT 3000 FT, ON APPROACH, LT ENGINE BEGAN TO RUN ROUGH, PILOT PERFORMED FLOW CHECK, ALL ENGINE INSTRUMENTS APPEARED NORMAL, BOOST PUMPS TO LOW AS A PRECAUTIONARY. LT ENGINE CONTINUED TO RUN ROUGHER THEN SHUTDOWN, PILOT FEATHERED LT PROPELLER, LANDED WITHOUT INCIDENT. MAINT FOUND NR 5 CONNECTING ROD FAILED. (VIVIBLE THRU 8 INCHES IN DIAMETER HOLE IN CASE HALVES. REMOVED AND REPLACED LT ENGINE AND RELEASED AIRCRAFT BACK TO SERVICE. (NE01200505272)

Part: DISTRIBUTOR GEAR — FAILED (MAGNETO)

ON CLIMB OUT HYDRAULIC PRESSURE LITE REMAINED ILLUMINATED AFTER GEAR RETRACTION. GEAR WAS EXTENDED FOR LANDING AND WHEN POWER WAS REDUCED THE RIGHT ENGINE LOST POWER. ENGINE WAS SHUTDOWN AND FEATHER, CREW LANDED WITHOUT INCIDENT. MECHANIC FOUND RIGHT ENGINE, BOTH MAGNETO DISTRIBUTOR GEARS HAD FAILED. MECHANIC CHANGED BOTH MAGNETO AND RETURNED AIRCRAFT TO SERVICE. SUGGEST TIME CHANGE OF DISTRIBUTOR GEAR AT MAGNETO HALF LIFE.