Cessna 421

Service difficulty reports · 57

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 = '421'
  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 2023FA0000152Unknown · unknownI HAVE 3 CESSNA 421C SERIAL NUMBER RANGES FROM 421C0005-421C 1075 THE RIGHT BRAKE HARD LINE IN CABIN IS UNDER THE SCAT TUBING IN THE AIRCRAFT CAUSING DISSIMILAR METAL CORROSION, I HAVE 3 THAT RAN OFF RUNWAY DUE TO RIGHT BRAKE FAILURE. PLEASE CHECK HARD LINE FOMar 22, 2023 · Cessna 421 · Standard Practices/StructuresSDR CA090209001Attach Bolt · crackedTHIS BOLT WAS INSPECTED DURING THE ANNUAL INSPECTION OF THIS AIRCRAFT. IT WAS VISUALLY SEEN TO HAVE WHAT LOOKED LIKE A CRACK ON THE HEAD SURFACE OF THE BOLT. THIS COULD BE MISTAKEN AS DAMAGE FROM A DRIFT OR HAMMER DONE DURING INSTALLATION. THE PART WAS REMOJan 23, 2009 · Cessna 421 · Wing Main, Frame StructureSDR 2006FA0001178Clamp · crackedDURING PROGRESSIVE INSPECTION FOUND LT ENGINE TURBOCHARGER TO TAILPIPE CLAMP CRACKED ALONG CIRCUMFERENCE, APPROX. 4 INCH CRACK. FOUND SAME PN CLAMP ON THE RT ENGINE OF THIS AIRCRAFT TO BE CRACKED 7 HOURS PREVIOUSLY.Dec 12, 2006 · Cessna 421 · Exhaust TurbochargerSDR CA061030003Gear · broken(CAN) (1)GEAR TOOTH BROKE OFF THE STARTER SHAFT GEAR IN A NEW STARTER ADAPTER ASSEMBLY CAUSING FOREIGN MATERIAL TO ENTER THE ENGINE LEADING TO FURTHER DAMAGE INSIDE THE CRANKCASE. FINAL RESULT WAS LOSS OF POWER TO THE RT ENGINE AND UNSCHEDULED LANDING. (TC NR Jun 27, 2006 · Cessna 421 · Engine StarterSDR 2004FA0000915Exhaust Rocker · brokenANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM AND STUCK VALVE FOR NR 3 CYLINDER ON THE LEFT ENGINE. ALSO, NOTED IS AN APPARENT INCLUSION IN THOct 22, 2004 · N4068L · Cessna 421 · Reciprocating Engine Cylinder SectionSDR 2004FA0000914Rocker · brokenANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM AND STUCK VALVE FOR NR 3 CYLINDER ON THE LEFT ENGINE. ALSO, NOTED IS AN APPARENT INCLUSION IN THOct 22, 2004 · N4068L · Cessna 421 · Reciprocating Engine Cylinder SectionSDR AUS20020774Hose · transposed(AUS) LH ENGINE OIL FILTER SUPPLY AND DISCHARGE HOSES TRANSPOSED. OIL FILTER RUPTURED. PERSONNEL/MAINTENANCE ERROR.Jul 24, 2002 · Cessna 421 · Engine Oil Distribution (Airframe Furnished)SDR 2000ZZZX626Beam · crackedTHE LEFT ENGINE AFT BEAM ASSEMBLY IS CRACKED. CRACK IS AT THE OUTBOARD BEAM ASSEMBLY (P/N 5054030-13) ATTACHMENT POINT AT THE TOP SIDE, AFT END, EXTENDING 1.1250 INCHES. THE OUTBOARD BEAM ASSEMBLY (5054030-13) ALSO HAD 3 RIVETS WITH HEADS MISSING ON THE INBOMar 14, 2000 · N3121K · Cessna 421 · Nacelle/Pylon, Main FrameSDR 2000ZZZX625Manifold · crackedDURING ANNUAL INSPECTION, A CRACK EXTENDING ABOUT 2 INCHES EACH SIDE OF THE THREADED BOSS. THE BOSS HAD BEEN DRILLED AND TAPPED FOR A HELICOIL. THREADED BOSS IS FOR ATTACHING THE INTERCOOLER.Mar 14, 2000 · N3121K · Cessna 421 · Reciprocating Engine Power SectionSDR 20000331SH025Stud · failedDURING INSPECTION OF OIL LEAK, FOUND NR 5 CYLINDER BASE FRONT LOWER MOUNT STUD BROKEN. POSSIBLY, THE STUD WAS HARD AND BROKE UNDER STRESS. (X)Mar 6, 2000 · N421CH · Cessna 421 · Reciprocating Engine Cylinder SectionSDR 2000ZZZX378Rudder Opening · contaminatedA LARGE AND VERY WELL HIDDEN BIRD'S NEST WAS FOUND IN RUDDER OPENING. FORWARD MIDWAY WHERE RUDDER TRIM COMES IN. EVERYTHING HAD SCREENS, BUT THE BIRDS FOUND A PLACE.Dec 30, 1999 · N5AY · Cessna 421 · Vertical StabilizerSDR 99ZZZX302Line · leakingPILOT REPORTED A SEVERE OIL LEAK ON THE LT ENGINE. REMOVAL OF ENG COWLINGS REVEALED OIL LEAKING FROM INSIDE OF THE FIRE SLEEVE ON THE FORWARD END OF THE TURBOCHARGER OIL SUPPLY HOSE. INSPECTION OF THE TURBO OIL SUPPLY HOSE REVEALED THE HOSE WAS ROUTED IMPROPDec 11, 1998 · N789AC · Cessna 421 · Engine Oil Distribution (Airframe Furnished)SDR 98ZZZX3931Hinge · looseRIGHT AND LEFT OUTBOARD AILERON HINGE AS ATTACHED TO SPAR. RIVETS THAT PASS THROUGH HINGE, SPAR, AND LAST RIB HAVE SHEARED LEAVING LAST RIB UNSUPPORTED CRACKING SKIN IN ONE PLACE; AS WELL AS OUTER MOST PART OF REAR SPAR NOT BEING SUPPORTED WHEN AIR LOADS ARE Oct 6, 1998 · N62DW · Cessna 421 · AileronsSDR 98ZZZX3930Hinge · looseRIGHT AND LEFT OUTBOARD AILERON HINGE AS ATTACHED TO SPAR. RIVETS THAT PASS THROUGH HINGE, SPAR, AND LAST RIB HAVE SHEARED LEAVING LAST RIB UNSUPPORTED CRACKING SKIN IN ONE PLACE; AS WELL AS OUTER MOST PART OF REAR SPAR NOT BEING SUPPORTED WHEN AIR LOADS ARE Oct 6, 1998 · N62DW · Cessna 421 · AileronsSDR 97ZZZX3153Alternator · failedALTERNATOR FAILED AFTER 136.6 HOURS OF OPERATION. OVERHAULED 10-3-96. SUBMITTER STATED CONTINUE TO HAVE SHORT SERVICE LIFE ON THESE UNITS.Jun 13, 1997 · N421Z · Cessna 421 · DC Generator-AlternatorSDR 97ZZZX1827Gear · detachedPILOT LOST POWER FROM THE ALTERNATOR. UPON INVESTIGATING THE PROBLEM, DISCOVERED THE ALTERNATOR DRIVE GEAR HAD FALLEN OFF THE ALTERNATOR, INSIDE THE ENGINE, CAUSING SUBSTANTIAL DAMAGE IN THE FORWARD RIGHT-HAND HALF OF THE CRANKCASE. UPON DISASSEMBLY OF THE EFeb 6, 1997 · N4584L · Cessna 421 · Alternator-Generator DriveSDR 97ZZZX1826Crank Gear · screws looseUPON ENGINE DISASSEMBLY FOUND ALL 6 CRANK GEAR RETAINING SCREWS 'GANG WIRED'. IN ADDITION TO NOT BEING LOCK WIRED CORRECTLY, THE CRANK GEAR SCREWS WERE ALL LOOSE. SEE TELEDYNE CONTINENTAL MOTORS SIL 93-15 FOR CORRECT USE OF SAFETY WIRE, KEYS, AND LOCK TABS.Feb 6, 1997 · N4584L · Cessna 421 · Reciprocating Engine Rear SectionSDR 97ZZZX1193Wastegate · crackedDURING AN OIL AND FILTER CHANGE, THE WASTEGATE CRACK DEFECT WAS FOUND. DEFECT NOT PRESENT AT 50 HOUR CHECK 50 HOURS PREVIOUS.Jan 1, 1997 · Cessna 421 · Exhaust TurbochargerSDR EY2R9601308Nut · corrodedNUT CORRODED.Dec 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9601307Hub · corrodedHUB FOUND CORRODED.Dec 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9601281Blade · corrodedBLADE SHANK, SN K76153, FOUND CORRODED.Dec 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9601280Blade · corrodedBLADE SHANK, SN K76140, FOUND CORRODED.Dec 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9601279Blade · corrodedBLADE SHANK, SN K76136, FOUND CORRODED.Dec 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9601261Blade · corrodedBLADE, SN C31669YS, FOUND CORRODED.Dec 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9601028Slip Ring · corrodedCORROSION FOUND ON SPLIT RING.Oct 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9601027Retain Bearing · corrodedRETAIN BEARING CORRODED.Oct 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9601026Split Retainer · corrodedCORROSION FOUND ON SPLIT RETAINER.Oct 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600914Prop · corrodedPROP ASSY CORRODEDAug 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9601545Feather Cylinder · defectivePROP ASSY FEATHER ASSY .067 LARGER THAN NORMALJun 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600770Dowel · corrodedDOWEL CORRODED.Jun 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600757Blade · corrodedBLADE FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600756Blade · corrodedBLADE, SN OA037YS, FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600755Blade · corrodedBLADE, SN HL062YS, FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600754Blade · corrodedBLADE, SN HL080YS, FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600753Hub · corrodedHUB FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9600752Nut · corrodedNUT CORRODED.Jun 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600751Ferrule · corrodedFERRULE FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600750Blade Act Pin · corrodedBLADE ACT PIN FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600749Blade · corrodedBLADE, SN IA029, FOUND CORRODED.Jun 1, 1996 · Cessna 421 · Propeller Blade SectionSDR EY2R9600071Hub · crackedHUB ASSY CRACKEDJun 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9601502Piston Rod Assy · wornPROP ASSY PISTON ROD ASSY IS WORNMay 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600618Propeller · corrodedEXCESSIVE INTERNAL DAMAGE & CORRMay 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600617Act Pin Assy · corrodedACT PIN ASSY FOUND CORRODED.May 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600616Act Pin Assy · corrodedACT PIN ASSY FOUND CORRODED.May 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600612Retain Bearing · corrodedRETAIN BEARING FOUND WITH CORROSION.May 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600061Hub · crackedHUB CRACKED IN RETENTION THREADSMay 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9600060Hub · crackedHUB CRACKED IN RETENTION THREADSMay 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9601480Hub · strippedPROP ASSY HUB DOWEL PIN HOLE STUD STRIPPEDApr 1, 1996 · Cessna 421 · Propeller Hub SectionSDR EY2R9600524Cylinder Pin · corrodedCORROSION FOUND ON CYLINDER PIN.Apr 1, 1996 · Cessna 421 · Propeller AssemblySDR EY2R9600523Blade · corrodedBLADE, SN B24646YS, FOUND CORRODED.Apr 1, 1996 · Cessna 421 · Propeller Blade Section
Back to Cessna 421