Cessna 421C

Service difficulty reports · 427

Newest first. General aviation reporting is voluntary.

Query with SQL
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"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR 2013FA0000508Wastegate Valve · separatedTHREADS IN WASTEGATE ACTUATOR FAILED AT OIL FEED LINE, FITTING SEPARATED FORM ACTUATOR RELEASING ALL OIL FROM LT ENGINE DURING FLIGHT.Jul 29, 2013 · N421TG · Cessna 421C · Exhaust TurbochargerSDR 2013FA0000450Stud · crackedENGINE RUNNING ROUGH UNDER POWER AND NR 5 CYLINDER MONITOR COOLER THAN THE REST. DURING INSPECTION, FOUND FOUR CYLINDER STUDS MISSING AND A GAP BETWEEN CYLINDER BASE AND CRANKCASE. PERFORMED A DYE PENETRATE CHECK ON CASE AND FOUND A CRACK ON FWD TOP STUD.Jun 13, 2013 · N51RX · Cessna 421C · Reciprocating Engine Cylinder SectionSDR F472013F00000Tube · destroyedON LANDING RT MAIN TIRE BLEW. ON TEARDOWN INSPECTION, NOTED TUBE WAS TOTALLY DESTROYED. REPLACED TIRE AND TUBE.Jun 6, 2013 · N789RP · Cessna 421C · Tire TubeSDR 2013FA0000242Cylinder · damagedNR 5 CYLINDER SEPARATED FORM ENGINE IN FLIGHT BENT NR5 ROD AND DAMAGED CASE. PILOT FEATHERED ENGINE ON DECENT AND LANDED WITHOUT INCIDENT.Apr 24, 2013 · N68685 · Cessna 421C · Reciprocating Engine Cylinder SectionSDR CA130416011Oil System · low pressure(CAN) DURING A TEST FLIGHT THE ENGINE WAS SHUTDOWN DUE TO INDICATION OF LOW OIL PRESSURE. DURING THE ON GROUND TEST INVESTIGATION, THE MECHANICS REPORTED A STRONG OIL ODOR AND VAPOR COMING OUT FROM THE EXHAUST. TROUBLESHOOTING IS ON GOING.Apr 2, 2013 · Cessna 421C · Engine Oil Indicating SystemSDR HLF2013F00000Cylinder · separatedDURING FLIGHT, ENGINE HAD A SMALL VIBRATION, FOLLOWED BY A LOUD NOISE, PILOT SHUT ENGINE DOWN AND SAFETY LANDED. INITIAL INSPECTION SHOWED RT ENGINE NR 5 CYLINDER SEPARATION FROM CASE BY SHEARING ALL FLANGE BOLTS, CYLINDER DAMAGED RT SIDE ENGINE ACCESSORIES FMar 29, 2013 · N421DS · Cessna 421C · Reciprocating Engine Cylinder SectionSDR CA130401025Crankcase · cracked(CAN) PILOT REPORTED FINDING AN OIL LEAK ON THE RT ENGINE AND ASKED MAINTENANCE TO INVESTIGATE. UPON INVESTIGATION THE SOURCE OF THE OIL WAS FOUND TO BE A CRACK ON THE RT SIDE OF THE CRANKCASE BETWEEN CYLINDER NR 3 & 5. AT LAST ENGINE O/H, THE ENGINE WAS ASSEMar 28, 2013 · Cessna 421C · Reciprocating Engine Power SectionSDR CA130326001Nut · split(CAN) THE PILOT REPORTED THAT DURING A PRE-FLIGHT WALK-AROUND INSPECTION HE FOUND A LOOSE NUT IN THE RT ENGINE COWL. THE NUT WAS FOUND TO BE SPLIT ACROSS THE THREADS, DOWN ITS ENTIRE LENGTH. UPON FURTHER INSPECTION OF THE ENGINE, A FWD GEARBOX UPPER THROUGH Mar 25, 2013 · Cessna 421C · Powerplant SystemSDR 2013FA0000095Cylinder · separatedNR 5 CYLINDER HAD BARREL SEPARATION DURING FLIGHT.Feb 1, 2013 · N88640 · Cessna 421C · Reciprocating Engine Cylinder SectionSDR JBZA20121231005Autopilot Sys · malfunctionedPASSING THROUGH 8000FT MSL, THE AUTOPILOT SYS WENT INTO AN UNCOMMANDED NOSE PITCH OVER RAPID DESCENT. PILOT TRIED THE AUTOPILOT DISCONNECT SWITCH WHILE TRYING TO ARREST THE DESCENT WITH THE ELEVATOR BACK PRESSURE. SWITCH DID NOT DISENGAGE THE AUTOPILOT. TRIDec 26, 2012 · N56RX · Cessna 421C · Autopilot SystemSDR F472012F00000Engine · making metalRT ENGINE LOSS OF POWER ON CLIMBOUT. ENGINE FEATHER. METAL IN OIL FILTER AND OIL PLUG. DAMPNER DOESN`T TRACK TRUE.Nov 25, 2012 · N421RX · Cessna 421C · Engine (Reciprocating)SDR 2012FA0000810Cylinder · detachedNR 5 CYLINDER UPPER BASE STUDS FAILED - THREE BLIND STUDS & 1 CASE THROUGH-STUD. CYLINDER PARTIALLY DISLODGED FROM CRANKCASE, LOSS OF ENGINE OIL, SIGNIFICANT VIBRATION, PRECAUTIONARY IN-FLIGHT SHUTDOWN AND FEATHER.Nov 21, 2012 · N2668A · Cessna 421C · Reciprocating Engine Cylinder SectionSDR JBZA201210261003Stud · brokenDURING AMT TROUBLESHOOTING OF THE NR 1 ENGINE ALTERNATOR INTERMITTENT, DISCOVERED CRANKCASE STUDS BROKEN, UNRELATED TO THE ALTERNATOR ISSUE, INITIATED THE DISASSEMBLY AND REMOVED CYLINDER, ALL NON-DESTRUCTIVE TESTING CHECKS OK, REPLACING THE STUDS, ALSO REPLAOct 23, 2012 · N56RX · Cessna 421C · Reciprocating Engine Power SectionSDR 2012FA0000653Governor · failedAFTER TAKEOFF, THE RT ENGINE PROPELLER WENT INTO A FULL FEATHER. ENGINE SHUTDOWN AUTOMATICALLY AND ONE ATTEMPT TO RESTART WAS MADE WITH NO SUCCESS. A LANDING WAS EXECUTED WITHOUT INCIDENT. SUBSEQUENT GROUND INSPECTION REVEALED AN OIL LEAKAGE AROUND PROPELLER Sep 21, 2012 · N421G · Cessna 421C · Propeller GovernorSDR 2012FA0000644Governor · pressure lossON CLIMB OUT AFTER TAKEOFF, AT APPROXIMATELY 500 FT AGL, THE RT ENGINE PROPELLER WENT TO A FULL FEATHER. ENGINE SHUTDOWN AUTOMATICALLY AND ONE ATTEMPT TO RESTART WAS MADE WITH NO SUCCESS. A LANDING WAS EXCUTED WITHOUT INCIDENT. SUSEQUENT GROUND INSPECTION Sep 21, 2012 · N421GJ · Cessna 421C · Propeller Feathering/ReversingSDR 2012FA0000664Cable Assy · brokenLANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF, OR EXTEND WHEN GEAR DOWN WAS SELECTED. THE EMERGENCY GEAR EXTENSION HANDLE WAS PULLED, AND IT BROKE OFF IN THE PILOT'S HAND. THE ACFT LANDED WITH THE GEAR UP. TROUBLESHOOTING REVEALED THAT THE CABLE BROKE AT THE Aug 6, 2012 · N87532 · Cessna 421C · Landing Gear Retraction/Extension SystemSDR 2012FA0000663Diode · shortedTHE LANDING GEAR WOULD NOT FULLY RETRACT AFTER TAKEOFF, OR EXTEND WHEN GEAR DOWN WAS SELECTED. THE EMERGENCY EXTENSION SYS ALSO FAILED, SO THE ACFT WAS FORCED TO LAND WITH THE GEAR UP. TROUBLESHOOTING DETERMINED THAT DIODE CR32 HAD SHORTED, CAUSING THE LANDINGAug 6, 2012 · N87532 · Cessna 421C · Landing Gear System WiringSDR 2012FA0000447Engine · failedDURING A TEST FLIGHT, HAD A RT ENGINE FAILURE AT APPROX 2500 FT, REDUCED POWER TO 34.5 INCHES OF MAP AND LEANED ENGINES TO APPROX 35 GAL/HR/SIDE. CLIMBING THROUGH 12,000 FT WITH THE POWER SET TO TOP OF THE GREEN ARC. WHILE MONITORING THE ENGINE GAUGES, NOTICJun 20, 2012 · N82JM · Cessna 421C · Engine (Reciprocating)SDR HLF2012F00000Alternator · failedDURING A WALK AROUND CHECK, FOUND ALTERNATOR CAP/ GUARD MISSING. TAKING A CLOSER LOOK, NOTICED BEARING MISSING FROM SHAFT, UNABLE TO FIND CAP OR BEARING.Apr 25, 2012 · N26HE · Cessna 421C · DC Generator-AlternatorSDR 2012FA0000246Gasket · failedOIL FILLER CAP GASKET ON ENGINE. HAVE REPLACED THE GASKET TWO TIMES DUE TO DISTORTION AND TORN. GASKET MATERIAL LACKS STABILITY FOR THE TWISTING FORCE IT IS SUBJECTED TO. THE MATERIAL SQUEEZES OUT OF PLACE AND WINDS UP IN THE WINGS OF THE CAP. THIS CAUSES Mar 22, 2012 · N421AZ · Cessna 421C · Reciprocating Engine Oil SystemSDR 2012FA0000321Crankcase · crackedON COMLETION OF A ROUTINE INSPECTION, A CRACKED ENGINE CASE STARTING AT NR 5 CYLINDER AND REARWARD 2.5"Mar 5, 2012 · N421RX · Cessna 421C · Reciprocating Engine Power SectionSDR 2012FA0000113Gear · brokenDURING ANNUAL INSPECTION, WHILE COMPLYING WITH AD-07-05-15 (DATED 04/16/07), STARTER ADAPTER 400-HOUR INSPECTION IAW MSB 94-4G, FOUND ONE BROKEN TOOTH ON CAMSHAFT GEAR. ENGINE DISASSEMBLED WITH NO OTHER INDICATIONS FOUND OF RELATED DEFECTS OR DAMAGE INTERNALLFeb 2, 2012 · N311JH · Cessna 421C · Reciprocating Engine Power SectionSDR CA120117002Windshield · cracked(CAN) PILOT`S SIDE, LT, WINDSHIELD, ACRYLIC-HEATED, CRACKED IN-FLIGHT, CRUISE. ACFT WAS DEPRESSURIZED AND LANDED WITHOUT INCIDENT AT CLOSEST SUITABLE AIRPORT.Jan 13, 2012 · Cessna 421C · Flight Compartment WindowsSDR F47A2012F00000Crankcase · crackedUPON INSPECTION OF RT ENGINE, VERIFIED CRACKED RT SIDE CASE, FROM NR 5 TOP CYLINDER, AREA THRU DATA PLATE IE RAM STC SE8338SW-D-SMOX 165.2 HRS.Dec 23, 2011 · N421RX · Cessna 421C · Reciprocating Engine Power SectionSDR U7Z2011F00000Connecting Rod · crackedREMOVED THE ENGINE FROM RT POSITION FOR SHIPMENT BACK DUE TO A DAMAGED CASE. DAMAGE APPEARS TO BE CAUSED BY A FAILED CONNECTING ROD THAT BROKE APART AND PUNCTURED 2 LARGE HOLES IN THE CRANKCASE. BRIEF HISTORY: 325.5 HRS PRIOR TO THE FAILURE OF ENGINE, STARTEOct 12, 2011 · N12RJ · Cessna 421C · Reciprocating Engine Power SectionSDR 2011FA0000660Exhaust Rocker · brokenPILOT STATED HE WAS IN NORMAL CRUISE, WHEN HE SUDDENLY LOST POWER AND NOTICED A VIBRATION FROM THE LT ENGINE. HE IMMEDIATELY FEATHERED THE LT ENGINE AND LANDED. INSP REVEALED THE NR 2 CYL EXHAUST ROCKER WAS SHEARED DUE TO A SUSPECTED CASTING DEFECT.Oct 4, 2011 · N421AD · Cessna 421C · Reciprocating Engine Cylinder SectionSDR FMMA20111005002Retainer · brokenROCKER SHAFT RETAINER BROKE LETTING 1/3 OF RETAINER TO DROB TO BOTTOM OF ROCKER BOX COVER WHERE IT LODGED BETWEEN END OF ROCKER ARM. PUNCHED HOLE IN COVER - LETTING OIL TO ESCAPE. PROB CAUSE: CRACKED AT ASSEMBLY.Sep 10, 2011 · N21WU · Cessna 421C · Reciprocating Engine Cylinder SectionSDR FMMA20111005001Unknown · malfunctionedNO OIL PRESSURE RIGHT ENGINE. RIGHT PROPELLER WOULD NOT COMPLETELY FEATHER.Sep 10, 2011 · N21WU · Cessna 421C · Propeller Feathering/ReversingSDR 2011F00188Oil System · low pressureNO OIL PRESSURE RIGHT ENGINE. RIGHT ENGINE WOULD NOT COMPLETELY FEATHER.Sep 10, 2011 · N21WU · Cessna 421C · Engine Oil Indicating SystemSDR 2011FA0000267Magneto · seizedPILOT REPORTED THE LT ENGINE WAS RUNNING RUFF. THE LT ENGINE WOULD NOT START WHEN TRYING TO TROUBLESHOOT. THE LT MAG HAD SEIZED UP AND DAMAGED THE RUBBER MAG DRIVE BUSHINGS AND MAG DRIVE GEAR RETAINER.Apr 8, 2011 · N5355J · Cessna 421C · Magneto/DistributorSDR F472011F00000Case · cracked10 MILES FROM LANDING, PILOT REPORTED RT ENG ROUGH AFTER TROUBLESHOOTING WITH MAG, FUEL AND PUMPS. NOTICED OIL FROM ACCESS DOOR. ENGINE WAS FEATHERED AND SECURED. MX FOUND CRACKED CASE STARTING AT NR 5 CYLINDER. TOP FWD BASE STUD TO FLOW DIVIDER. (THIS ISMar 28, 2011 · N421RX · Cessna 421C · Reciprocating Engine Power SectionSDR 2011FA0000081Probe · mismanufacturedNEW INSTALLATION OF EDM-960 DIGITAL ENG MONITOR AS PRIMARY REPLACEMENT OF ALL FACTORY INSTALLED ENGINE INSTRUMENTATION IAW STC SA01828SE. SECOND INSTANCE, TO HAVE FOUND THE NEW PN 400509 OIL TEMP PROBE SUPPLIED WITH KIT WILL NOT FIT ORIGINAL FACTORY OIL TEMP Jan 6, 2011 · N2657N · Cessna 421C · Engine Oil TemperatureSDR CA100913007Turbocharger · crackedTURBOCHARGER WAS SENT IN AS CRACK WAS DISCOVERED DURING ANNUAL INSP. CRACK ORIGINATES FROM THE END OF THE DIVIDER PLATE INTO THE MAIN BODY OF THE COLLECTOR. EXACT CAUSE OF CRACK IS UNKNOWN AS TURBOCHARGER CONFORMS WITH REPAIR FIXTURE. POSSIBLE LOADING OF EXSep 9, 2010 · Cessna 421C · Exhaust TurbochargerSDR VE72010F00000Lug · brokenACFT SUFFERED NOSE GEAR COLLAPSE NEAR THE END OF ITS ROLL OUT AFTER LANDING. PART OF UPPER MOUNTING BRACKET FOR NOSE GEAR ACTUATOR BROKE FREE OF AIRFRAME RELEASING DOWNLOCK CAUSING NOSE TO DROP. BOTH PROPS MADE CONTACT WITH PAVEMENT STOPPING ENGINES WHILE TUAug 22, 2010 · N87561 · Cessna 421C · Landing Gear ActuatorSDR 2010FA0000769Trunnion · crackedTRUNNION TUBE WAS FOUND TO BE CRACKED AT ACTUATOR ATTACH BRACKET.Jul 28, 2010 · Cessna 421C · Fuselage, Landing Gear Attach FittingsSDR 2011F00141Journal · mismanufacturedENGINE DEVELOPED A VIBRATION. UPON REMOVAL AND TEARDOWN, IT WAS DISCOVERED THAT THE CAM JOURNALS WERE MISSING THE NECESSARY LUBRICATION CHANNELS. IT IS THE OPINION OF REPAIR STATION+ THAT THE HOLES WERE FILLED WITH A .1875" SOLID MATERIAL CONSISTENT WITH THE Jul 19, 2010 · N42ML · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2010FA0000522Blade · looseON CLIMB OUT, ACFT BEGAN TO SHAKE, IT BEGAN TO SHAKE WORSE AS THE FLIGHT PROGRESSED. FLIGHT LANDED SAFELY AT THE INTENDED AIRPORT. AFTER INSPECTION IT WAS REVEALED ONE OF THE PROPELLER BLADES WAS LOOSE. REMOVED PROPELLER AND SENT TO PROP SHOP FOR OVERHAUL.May 21, 2010 · N67JV · Cessna 421C · Propeller Blade SectionSDR 2010FA0000029Control Valve · crackedDURING AN ANNUAL INSP, A HAIRLINE CRACK WAS DISCOVERED ON THE BLOCK OF THE LANDING GEAR CONTROL VALVE, PN 9910225-1. THE CRACK WAS ALLOWING HYD FLUID TO LEAK OUT, THE LEAK WAS SMALL. THE PART HAD 16.1 HRS SINCE O/H. THE VALVE WAS SENT BACK TO O/H, WHERE THEDec 9, 2009 · N3875C · Cessna 421C · Landing Gear Retraction/Extension SystemSDR T9ZR725Y4370/41Blade · damagedPROP WAS OBSERVED TO BE LEAKING GREASE FROM 2 BLADE SHANK AREAS. SPINNER WAS REMOVED FOR INSP AND ALL 3 BLADES APPEAR TO BE LEAKING GREASE. 1 BLADE WAS OBSERVED TO HAVE EXCESSIVE BLADE SHANK MOVEMENT BEYOND ALLOWABLE LIMITS. WHEN BLADES WERE CHECK FOR BLADE TWDec 9, 2009 · N421JS · Cessna 421C · Propeller Blade SectionSDR T9ZR725Y4370/40Blade · leakingPROP WAS OBSERVED TO BE LEAKING GREASE FROM TWO BLADE SHANK AREAS. SPINNER WAS REMOVED FOR INSP AND ALL 3 BLADES APPEAR TO BE LEAKING GREASE. ONE BLADE WAS OBSERVED TO HAVE EXCESSIVE BLADE SHANK MOVEMENT BEYOND ALLOWABLE LIMITS. WHEN BLADES WERE CHECK FOR BLADDec 9, 2009 · N421JS · Cessna 421C · Propeller Blade SectionSDR TR7A090918001Crankcase · cracked1.5" CRACK ON TOP INBD SECTION OF CRANKCASE BETWEEN NR 3 AND NR 5 CYLINDERS. CRACK IS IN "NON-CRITICAL" AREA AND LESS THAN THE MAXIMUM ALLOWABLE LIMIT AS SPECIFIED BY SB 90-17. OWNER HAD ENG REMOVED AND HAD THE CRACK REPAIRED TO PERFORM TBO 460 HOURS BEFORE Sep 18, 2009 · N297D · Cessna 421C · Reciprocating Engine Power SectionSDR CA090826009Valve Spring · broken(CAN) CREW REPORTED RT ENG RUNNING ROUGH. UPON INSP, MX FOUND NR5 CYL EXHAUST VALVE SPRING BROKEN. SPRING REPLACED AND ENG GROUND RUN NORMAL.Aug 9, 2009 · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2009FA0000769Diode · intermittentPILOT COMPLAINED ABOUT RT ENG GOING TO HIGH FUEL PUMP PRESSURE INTERMITTENTLY WITH PUMP SET ON LOW, AFTER MANY HOURS OF TROUBLESHOOTING (IT ALWAYS WORKED IN THE SHOP PROPERLY), THE PROBLEM WAS DETERMINED TO BE AN INTERMITTENT DIODE IN THE FUEL BOOST PUMP CIRCUJul 14, 2009 · N3875C · Cessna 421C · Electrical Power System WiringSDR CA090728008Skin · cracked(CAN) DURING INSPECTION, REFERENCED SKIN WAS FOUND CRACKED UNDER NOSE GEAR TRUNNION BEARING SUPPORT BLOCK SPACER. CRACK THAT WAS FORMING FOLLOWED THE EXACT EDGE OF THE SPACER AND WAS APPROX 1/7TH THE PERIMETER LENGTH, OF THE SPACER. SKIN WAS SUBSEQUENTLY REPJun 29, 2009 · Cessna 421C · Fuselage Main, Plate/SkinSDR K4SA200901Distributor Gear · brokenAFTER LEVEL OFF FOR CRUISE, A VIBRATION OR BUFFET WAS NOTED. ALL ENGINE TEMPS AND INDICATIONS APPEARED NORMAL. WAS UNABLE TO IDENTIFY WHICH ENGINE WAS CAUSING VIBRATION/BUFFET. RETURNED TO AIRPORT AND FLIGHT WAS TERMINATED. POST FLIGHT ENGINE RUN-UP REVEALJun 24, 2009 · N421PR · Cessna 421C · Magneto/DistributorSDR 2009FA0000359Crankcase · crackedCRANKCASE CRACKED FWD OF THE NR 5 CYLINDER LOWER FRONT HOLD DOWN SFOD. CRANKCASE HAD BEEN REPAIRED AT ANOTHER CYL PREVIOUSLY. (K)May 1, 2009 · N341AB · Cessna 421C · Reciprocating Engine Power SectionSDR 2009FA0000891Crankshaft · brokenRECEIVED ENGINE INTO DISASSY SHOP ON 4/30/09. SMOH: 246.7- POSSIBLY NR 5 CYLINDER NOT TORQUED PROPERLY (MAINTENANCE AFTER O/H). CRANKSHAFT BROKEN AT NR 3 MAIN JOURNAL. M010 CRANK. DAMAGE AT CRANKCASE NR 3 AND NR 4 MAIN BEARING TOWER. FRETTING AT NR 3 TOWEApr 30, 2009 · N444EW · Cessna 421C · Reciprocating Engine Power SectionSDR BXS2008F00000Landing Gear · malfunctionedMLG WOULD NOT RETRACT AFTER TAKEOFF. VISUALLY INSPECTED MLG SYS & FOUND NO DAMAGE. JACKED ACFT. PILOT CONFIRMED THAT 3 GREEN LIGHTS REMAINED ON, TRANSIT/WARMING LIGHT DID NOT ILLUMINATE & MLG HORN SOUNDED. EXPOSED SQUAT SWITCH WIRING SPLICES & TESTED SWITCDec 9, 2008 · N60RR · Cessna 421C · Landing Gear Retraction/Extension SystemSDR 2008FA0000625Bushing · crackedDURING CYLINDER NR 5 REMOVAL TO CORRECT HIGH OIL CONSUMPTION , FOUND CONNECTING ROD PISTON PIN BUSHING CRACKED WITH LARGE PIECE MISSING FROM EDGE. FAILURE IS AS NOTED IN MFG SB SB07-1. REMOVED ALL 6 CYLINDERS FROM ENGINE AND FOUND 4 MORE BUSHINGS CRACKED IN SSep 5, 2008 · N410AJ · Cessna 421C · Reciprocating Engine Power SectionSDR FIS2008F00000Fitting · crackedTHE COLLAR HAS A CRACK WHERE THE TAPER PIN GOES THROUGH. POSSIBLE SOMEONE OVER TORQUED THE TAPER PIN. (K)Jun 4, 2008 · N934HD · Cessna 421C · Elevator Control System
Back to Cessna 421C