Cessna 421C

Service difficulty reports · 427

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duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE aircraft_model_key = '421C'
  ORDER BY difficulty_date DESC"

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SDR 421C111003DGCylinder · wornON ENGINE START-UP, REAR PASSENGERS NOTED GREATER THAN USUAL SMOKE EMITTED FROM EXHAUST ON NR 1 ENGINE. THE PILOT SHUT DOWN AND PERFORMED A VISUAL INSPECTION OF THE ENGINE NACELLE FOR OIL AND/OR OTHER ABNORMAL CONDITIONS: NONE NOTED. THE PILOT PERFORMED ANONov 12, 2003 · N27RX · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2003FA0001147Exhaust Valve · brokenDURING FLIGHT .33 OF THE EXHAUST VALVE IN THE NR 4 CYLINDER BROKE CAUSING EXTENSIVE DAMAGE TO THE PISTON AND THE CYLINDER HEAD. DURING THE HIDDEN DAMAGE INSPECTION THE BROKEN VALVE WAS FOUND IN THE INTAKE PORT OF THE CYLINDER ON THE SAME CYLINDER. NO DAMAGE Oct 24, 2003 · N421ML · Cessna 421C · Reciprocating Engine Cylinder SectionSDR J7B2003F00001Coil · separatedON TAKE OFF THE RT ENGINE FEATHERED. INSPECTION REVEALED PROPELLER SYNCROPHASER COIL HAD BECOME SEPARATED FROM THE GOVERNOR BODY, CAUSING THE PROPELLER TO FEATHER. THE ATTACHING STUDS ON THE COIL HAD SHEARED AND BECAME BOUND UP WITH THE FLYWEIGHT ASSY. PULLOct 10, 2003 · N421GF · Cessna 421C · Propeller Synchronizer SectionSDR HLF2003F00001Crankcase · crackedCRACKED CRANKCASE AT NR 7 STUD, BETWEEN CYLINDERS NR 1 AND NR 3. CRACK IS ON CRITICAL AREA AND EXCEEDS THE MAX ALLOWED IAW SBM 90-17. PROBABLE CAUSE: OVERTORQUED NUT OR DEFECTIVE CRANKCASE. REPORTED TO MFG.Oct 6, 2003 · N148MA · Cessna 421C · Reciprocating Engine Power SectionSDR HLF2003F00000Crankcase · crackedCRACKED CRANKCASE AT NR 5 CYLINDER, CRACK IS 6 INCHES LONG, EXCEEDING THE MAX ALLOWED IAW SB 90-17. PROBABLE CAUSE: IMPROPER TORQUE OR DEFECTIVE CRANKCASE. REPORTED TO MFG.Oct 6, 2003 · N149AF · Cessna 421C · Reciprocating Engine Power SectionSDR DYV2003F00002Engine · failedSHORTLY AFTER TAKEOFF, THE PILOT EXPERIENCED AN UNEXPLAINED GRADUAL LOSS OF POWER ON THE LT ENGINE. AFTER FEATHERING THE LT PROP, THE PILOT MADE A SAFE, ON AIRPORT LANDING. UPON INITIAL INSPECTION AFTER LANDING, THE ENGINE WAS FOUND SEIZED AND UNABLE TO ROTASep 29, 2003 · N911EA · Cessna 421C · Engine (Reciprocating)SDR AUS20030839Housing · faulty(AUS) RT ENGINE OIL PUMP HOUSING FAULTY.Jul 16, 2003 · Cessna 421C · Reciprocating Engine Oil SystemSDR 2003FA0000703Support · brokenTHE TAB ON THE SUPPORT BROKE OFF ALLOWING THE RT MAIN LANDING GEAR UPLOCK PIVOT BLOCK TO MISSALIGN. THIS COULD RESULT IN THE LANDING GEAR NOT LOCKING UP OR NOT RELEASING WHEN DOWN WAS SELECTED.Jul 15, 2003 · N88586 · Cessna 421C · Landing Gear Retraction/Extension SystemSDR 2003FA0000899Elbow · brokenAT CRUISE, PILOT NOTICED A BLUE FUEL STAIN STREAMING BACK FROM THE LEFT ENGINE COOLING LOUVRES. FOUND BROKEN 90 DEGREE ELBOW FITTING ON FUEL MANIFOLD VALVE INLET WAS BROKEN DUE TO VIBRATION OF ENGINE.Jul 7, 2003 · N2655B · Cessna 421C · Aircraft Fuel Distribution SystemSDR J4P2004F00000Indicator · incorrectAC WAS LOADED FOR A TRIP WITH ENGINES STARTED. THE FUEL QUANTITY INDICATOR FOR THE AIRCRAFT LT AND RT TANKS WAS STEADY, BUT QUANTITY WAS LOW WITH A FULL FUEL LOAD ON BOARD, VISUALLY VERIFIED BY PILOT. TAXIED BACK TO THE HANGER AND UNLOADED PASSENGERS TO DIFFJun 27, 2003 · N427CC · Cessna 421C · Fuel Quantity IndicatorSDR DYV2003F00001Bellcrank · crackedCOULD BE OVER STEERING ON TUG MOTOR OR EXCESSIVE USE.Jun 5, 2003 · N4119M · Cessna 421C · Landing Gear Steering SystemSDR DYV2003F00000Bellcrank · crackedCOULD BE OVER STEERING ON TUG MOTOR OR EXCESSIVE USE. FOUND ON INSPECTION.Jun 5, 2003 · N215MP · Cessna 421C · Landing Gear Steering SystemSDR CMI2003F00000B-Nut · undertorquedNR 2 ENGINE STARTED RUNNING ROUGH. PILOT LANDED AND HAD PROBLEM CHECKED. NR 5 CLYINDER FUEL INJECTOR LWE B-NUT WAS LOOSE ON INJECTOR DUE TO IMPROPER TORQUE DURNING MAINTENANCE.Mar 20, 2003 · N8430N · Cessna 421C · Fuel Injector NozzleSDR IBUA121EReservoir · leakingDURING INSPECTION OF AIRCRAFT, FOUND SIGHT TUBE ON HYDRAULIC RESERVOIR TO BE LEAKING, REPLACED WITH NEW. AFTER A FEW DAYS THE AIRCRAFT WAS STILL IN INSPECTION AND SAW THAT IT WAS CRACKED AGAIN SO WE INSTALLED AND OTHER SIGHT TUBE. ON THE LAST DAY OF INSPECTIMar 19, 2003 · N84GE · Cessna 421C · Hydraulic Reservoir, MainSDR DYVA0001Crankcase · crackedDURING ROUTINE INSPECTION. CRACK IN CRACKCASE AT GEAR REDUCTION HOUSING. ENGINE REMOVED FOR REPAIR. CRACK LENGTH 1 INCH. SEEPING OIL. NDT VERIFIED CRACK.Jan 30, 2003 · N2655B · Cessna 421C · Reciprocating Engine Power SectionSDR CA030203004Starter · intermittent(CAN) FLIGHT CREW REPORTED THAT THE RIGHT HAND ENGINE WOULD INTERMITTENTLY 'SHUDDER'. THE FLIGHT CREW SECURED THE ENGINE AND THE AIRCRAFT RETURNED TO BASE UNEVENTFULLY. A DETAILED INSPECTION OF THE ENGINE AND IGNITION SYSTEM REVEALED THAT THE STARTING VIBRATORJan 29, 2003 · Cessna 421C · Engine StarterSDR DYVA0002Smoke · detectedDURING FLIGHT, SHORTLY AFTER HEATER WAS ACTIVATED, AN ODOR WAS OBSERVED IN AFT CABIN, FOLLOWED BY SMOKE. HEATER WAS TURNED OFF AND THE AIRCRAFT RETURNED TO BASE WITH NO INCIDENT. HEATING SYSTEM WAS INSPECTED INCLUDING A HEATER PRESSURE DECAY TEST. THE SYSTJan 29, 2003 · N215MP · Cessna 421C · Air Distribution SystemSDR CA021224001Fitting · leaking(CAN) THE PILOT REPORTED SHORTLY AFTER TAKEOFF THE RT ENGINE LOST OIL PRESSURE, ENGINE WAS SELECTED TO FEATHER AND SHUTDOWN, BUT PROPELLER FAILED TO FEATHER. A SUBSEQUENT INSPECTION OF THE RT ENGINE REVEALED THE FOLLOWING: OIL SUPPLY LINE FITTING AN8336 IN THEDec 20, 2002 · Cessna 421C · Exhaust TurbochargerSDR 2002FA0001301Hub · crackedDURING NOSE TIRE CHANGE, DEGREASING OF WHEEL AND HUB, THREE CRACKS WERE FOUND ON CENTER HUB WHERE END PLATES BOLT TO HUB. WHEEL ASSEMBLY WAS PREVIOUSLY PAINTED MAKING VISUAL INSPECTION IMPOSSIBLE. AT TIME OF CHANGE, PAINT FLAKING ALLOWED CRACKS TO SHOW UP. Nov 6, 2002 · N5491G · Cessna 421C · Wheel/Ski/FloatSDR AUS20021248Bearing · disintegrated(AUS) LH ALTERNATOR OUTER BEARING COLLAPSED. ALTERNATOR CONTAMINATEDWITH METAL FROM FAILED BEARING.Oct 24, 2002 · Cessna 421C · DC Generator-AlternatorSDR AUS20021208Line · corroded(AUS) OXYGEN INTERCONNECT LINES CORRODED FROM THE INSIDE OUT.Oct 17, 2002 · Cessna 421C · Passenger Oxygen SystemSDR 2002FA0001159Spark Plug · fouledROUGH MAGNETO ON RT ENGINE DURING RUN UP. PULLED SPARK PLUGS ON LT MAGNETO SIDE. FOUND ONE SPARK PLUG SHORTED OUT (OUTSIDE ELECTRODE TOUCHING CENTER ELECTRODE). WHEN THE OUTER ELECTRODES WERE TOUCHED THEY WERE FOUND TO BE VERY LOOSE AND FLOATING. SUSPECT TOct 2, 2002 · N421G · Cessna 421C · Spark Plug/IgniterSDR 2002FA0000998Spacer · burnedLT ENGINE AUX FUEL TANK ASSY HAS INCURRED HEAT RELATED DAMAGE ON THE ENGINE FIREWALL SIDE. THE FIRE SPACER SCREEN AND THE RETARDANT COATING ON THE TANK ASSY HAS SINGED AND MELTED ALONG THE FIREWALL SIDE AND UNDERSIDE OF ASSY. IN SOME AREAS THE COATING HAS REAug 23, 2002 · Cessna 421C · Fuel StorageSDR IBU2002F00000Line · chafedOXYGEN SUPPLY LINE WAS FOUND TO HAVE A HOLE RUBBED INTO IT FROM RAM AIR DUCT (THE DUCT SUPPORT COIL). A VISUAL INSPECTION OF THE AREA, WHEN ON GROUND, APPEARS TO HAVE CLEARANCE. BUT OUT BELIEF IS THAT IN THE AIR WITH RAM AIR COMING IN IT BOTH EXPANDS AND MOVAug 2, 2002 · N763CA · Cessna 421C · Crew Oxygen SystemSDR DYV2002F00000Injector · crackedDURING CRUISE FLIGHT RT ENGINE ROUGHNESS AND AN OBVIOUS FUEL LEAK WAS EXPERIENCED. THE PILOT SHUTDOWN AND SECURED THE RT ENGINE AND MADE A SAVE PRECAUTIONARY LANDING AT AN ON AIRPORT LOCATION. THE COMPANY MECHANIC LOCATED A FUEL LEAK AT THE NR 5 CYLINDER FUEJun 7, 2002 · N911EA · Cessna 421C · Fuel Injector NozzleSDR AUS20020506Strap · faulty(AUS) AIRCRAFT HAS HDH SPAR STRAP MODIFICATION FITTED. INVESTIGATIONFOUND NO EVIDENCE OF ONGOING NDT INSPECTION IAW HDH EDD/6 ISSUE 2 BEING CARRIED OUT. NDT TECHNIQUE IS NOT POSSIBLE IN THIS MODELAIRCRAFT.May 30, 2002 · Cessna 421C · Wing SparSDR 2002FA0000656Insulator · burnedON REPLACING LEFT WING LOCKER FUEL CELL, DISCOVERED (PN 5656006-2), FIREWALL FIRE SCREEN COATING BURNED THROUGH BEHIND TURBOCHARGER. REMOVED RIGHT NACELLE TOP SKIN AND DISCOVERED OTHER (PN 5656006-2) FIREWALL FIRE SCREEN IN SIMILAR CONDITION. INSTALLED NEWMay 8, 2002 · N241MW · Cessna 421C · Engine FiresealsSDR AUS20020495Nut · missing(AUS) RT ALTERNATOR DRIVE SHAFT COUPLING RETAINING NUT MISSING. SPLIT PIN WAS STILL INTACT. SUSPECT NUT SPLIT AND FELL OFF. LOOSE COUPLING CONTACTED ENGINE DRIVE GEARS CAUSING METAL CONTAMINATION OF THE ENGINE.May 7, 2002 · Cessna 421C · DC Generator-AlternatorSDR 2002FA0000583Spring · misinstalledAUXILIARY FUEL PUMP WAS RECEIVED NEW FROM SUPPLIER. ONCE INSTALLED , IT FAILED MFG SM CHECK . WHEN REMOVED FOR BENCH CHECK, IT WAS DISCOVERED, SPRING IN THE OUTLET SIDE IS MISINSTALLED.Apr 2, 2002 · N246MF · Cessna 421C · Engine Fuel PumpSDR N421DG030102Hydraulic System · contaminatedEXTENDED THE MLG ON APPROACH AND ONLY THE LT LOCKED INTO PLACE. NOTIFIED TOWER OF THIS CONDITION AND MANEUVERED WHILE WORKING ON THE PROBLEM. INITIATED THE APPROACH AGAIN AND EXECUTED EMERGENCY PROCEDURES, ONLY LT MAIN WAS LOCKED, THE LANDING WAS INITIATED AMar 21, 2002 · N421DG · Cessna 421C · Landing Gear Retraction/Extension SystemSDR ISP2002F00000Piston · failedNR 2 PISTON FAILED AT TAKE OFF UNDER FULL POWER.Feb 19, 2002 · N5560G · Cessna 421C · Reciprocating Engine Power SectionSDR 2002F00038Piston · failedTRANSISITIONING FROM TAKE-OFF TO CLIMB PHASE OF FLIGHT, AFTER REDUCING POWER NR 1 ENGINE SHUTDOWN. PILOT FEATHERED PROP AND MADE UNEVENTFUL LANDING. REMOVAL OF NR 5 CYLINDER REVEALED SEVERE DAMAGE TO THE TOP OF THE PISTON, WITH BROKEN RINGS. VALVE WERE REALITIJan 17, 2002 · N763CA · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2002F00037Torque Tube · corrodedDURING A AAIP 100 HOUR INSPECTION, SEVERE CORROSION WAS NOTED IN THE RIGHT ELEVATOR TORQUE TUBE. THE CORROSION (RUST) HAS DEPLETED AT LEAST 75% OF THE MATERIAL THICKNESS. THE LEFT ELEVATOR WAS REMOVED TO INSPECT THE TORQUE TUBE FOR CORROSION. NONE WAS NOTED. TDec 21, 2001 · N6793V · Cessna 421C · Elevator Control SystemSDR IBU2001F00000Bolt · shearedALTERNATOR CASE THIN BOLTS ARE SHEARING. BOLTS THAT RECOVERED FROM ENGINE COWLING, SHOWS SIGNS OF STRETCHING. BOLTS POSSIBLE OVER TORQUED FROM FACTORY.Nov 19, 2001 · N748CA · Cessna 421C · DC Generator-AlternatorSDR 2001FA0000383Drive Gear · damagedL. ALTERNATOR FAILED DURING FLIGHT AND A VIBRATION WAS NOTED ABOUT 20 MINUTES LATER. THE ENGINE OIL PRESSURE DROPPED ABOUT 25 PSI AND A PRECAUTIONARY LANDING WAS MADE. UPON REMOVAL OF THE ALTERNATOR IT WAS DISCOVERED THE DRIVE HUB WAS NEARLY DESTROYED AND THSep 29, 2001 · N112MJ · Cessna 421C · Alternator-Generator DriveSDR CB52002F00000Actuator · misinstalledRIGHT MAIN LANDING GEAR ACTUATOR (PN 99101364). THERE IS A POSSIBILITY THAT THE ACTUATOR MIGHT HAVE HAD ONE SEGMENT INCORRECTLY FITTED.Jul 24, 2001 · N6315X · Cessna 421C · Landing Gear Door Retract SectionSDR AUS20010759Contactor · stuck(AUS) LH ENGINE STARTER CONTACTOR STUCK CLOSED. LH ALTERNATOR DAMAGED.STARTER MOTOR TERMINAL POST DAMAGED.Jul 5, 2001 · Cessna 421C · Engine Starting SystemSDR 2001FA0000072Shaft · shearedAIRCRAFT PROPELLOR WENT INTO FEATHER ON APPROACH. AFTER LANDING, RESTARTED ENGINE AND PROPELLOR FELL OFF. PROP SHAFT SHEARED IN HALF. ENGINE HAD A PROP STRIKE 400 HOURS PREVIOUS.Jul 3, 2001 · N421LF · Cessna 421C · Propeller AssemblySDR CA010703032Bushing · worn(CAN) DURING SCHEDULED COMPLIANCE WITH CSB-94-4C THE STARTER SHAFT BUSHING WAS FOUND TO BE LOOSE IN THE ENGINE CASE.Jun 22, 2001 · Cessna 421C · Engine StarterSDR 2001F00021Nut · crackedDURING ANNUAL INSPECTION FOUND NUT CRACKED. NOTHING UNUSUAL NOTICED AS FAR AS INSTALLATION WAS CONCERNED. FOUND THAT NUT CRACKED IN THE CENTER OF THE V ON THE SMALLEST DIAMETER PART OF THE NUT. INSTALLED NEW NUT AND TORQUED TO SPECS. OTHER ENGINE CHECKED AJun 20, 2001 · N6865Z · Cessna 421C · Reciprocating Engine Power SectionSDR AUS20010645Bearing · failed(AUS) LH ALTERNATOR. INVESTIGATION FOUND REAR BEARING COLLAPSED CAUSING DRIVE ADAPTER FAILURE AND METAL CONTAMINATION OF THE ENGINE.Jun 12, 2001 · Cessna 421C · DC Generator-AlternatorSDR AUS20010612Windshield · faulty(AUS) WINDSHIELD LEAKING. HEATING SYSTEM PIPES BROKEN CAUSING EXCESSHEAT AND WARPING OF WINDSHIELD.Jun 8, 2001 · Cessna 421C · Flight Compartment WindowsSDR 20010515AP006Drive Shaft · shearedFLAPS STARTED TO EXTEND, THEN FAILED TO EXTEND ANY FURTHER. FOUND THE FLAP ACTUATOR SPROCKET DRIVE SHAFT SHEARED WHERE IT COMES OUT OF THE GEARBOX. IT APPEARS THAT IT SHEARED BECAUSE THE INNER SPROCKET PIN HOLE IN THE DRIVE SHAFT HAD BEEN CROSS DRILLED. THEMay 4, 2001 · N60RR · Cessna 421C · Trailing Edge Flap ActuatorSDR 20010515AP005Exhaust Header · defectiveTHIS UNIT IS MANUFACTURED IN TWO HALVES, WHERE THE UPPER & LOWER HALVES WELDED TOGETHER (AT THE WASTE GATE FLANGE) THERE IS A HOLE AT THE WELD AREA ON EACH SIDE. THE REPLACMENT PART HAS AN ADDITIONAL WELD IN THESE AREAS THAT ARE NOT PRESENT ON THE DEFECTIVE PMay 4, 2001 · N6867D · Cessna 421C · Engine Collector/Tailpipe/NozzleSDR 20010613CW005Drive Shaft · seizedAT 25 HR OIL CHANGE, INTERVAL OIL WAS FOUND VENTING OUT RIGHT ENGINE OVERBOARD DRAIN AND OIL DRAINED FROM ENGINE HAD METALLIC GLIMMER TO IT, ALTHOUGH CUTTING THE OIL FILTER DID NOT REVEAL ANY UNUSUAL AMOUNT OF METAL. OIL VENTING WAS TRACED TO ENGINE DRIVEN HYApr 13, 2001 · N6794D · Cessna 421C · Reciprocating Engine Rear SectionSDR 20010613CW004Bearing · seizedAT 25 HR OIL CHANGE, INTERVAL OIL WAS FOUND VENTING OUT THE RIGHT ENGINE OVERBOARD DRAIN AND THE OIL DRAINED FROM THE ENGINE HAD A METALLIC GLIMMER TO IT, ALTHOUGH CUTTING THE OIL FILTER DID NOT REVEAL ANY UNUSUAL AMOUNT OF METAL. OIL VENTING WAS TRACED TO Apr 13, 2001 · N6794D · Cessna 421C · Reciprocating Engine Rear SectionSDR CA010406008Engine · failed(CAN) PILOT/OWNER REPORTED NORMAL PRE-TAKEOFF START/RUN-UP PROCEDURES. NORMAL TAKEOFF WABASCA, ALBERTA, IN ROUTE, EXPERIENCED A SURGE (OVERBOOST) RT ENGINE. ADJUSTED POWER BACK TO CRUISE, LT AND RT. WHILE ADJUSTING MIXTURE - RIGHT ENGINE ''THE ENGINE BLEW UP'Mar 21, 2001 · Cessna 421C · Engine (Reciprocating)SDR 20010423CW018Wire · brokenFLAPS FAILED AND TRAVELED BEYOND STOP SWITCHES. ONLY THING THAT WAS FOUND WAS A BROKEN WIRE WHERE THE QUADRENT SWITCHES ARE LOCATED. MANY PARTS HAD TO BE REPLACED. BRACKETS, PULLEYS, RODS CABLES, CHAINS, BELLCRANKS, ACTUATOR AND BOLTS. AFTER REPAIR, OPERATMar 20, 2001 · N171N · Cessna 421C · Trailing Edge Flap Control SystemSDR 20010417CW012Clamp · brokenENROUTE, CRUISE. LT ENGINE TURBOCHARGER DAMAGED, BROKEN SHAFT AND SEIZED. PILOT FEATHERED LEFT PROP, SECURED ENGINE AND HAD SINGLE ENG LANDING. LANDED SAFELY. TANG PORTION OF CLAMP FOUND BROKEN OFF.Mar 11, 2001 · N4119M · Cessna 421C · Exhaust TurbochargerSDR 20010209CW009Beam · crackedAC TOTAL TIME 4800 HRS , CRACK NOTED ON BOTH BEAMS RIGHT AND LEFT OUTBOARD SIDE OF EACH ENGINE. BOTH CRACKS APPROX 1.5 IN LONG. CRACKS IN RADIUS OF BEND OF TOP STRAP OF BEAM ASSEMBLY NEAR JUNCTION OF FORE AND AFT RUNNING ENGINE MOUNT BEAMS.Feb 9, 2001 · N26603 · Cessna 421C · Nacelle/Pylon, Main Frame
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