Cessna 421B

Service difficulty reports · 210

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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 = '421B'
  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 97ZZZX959Mount Stud · brokenALIGNMENT DOWEL STUDS WERE BROKEN BELOW HUB MOUNTING FACE SURFACE.Feb 13, 1997 · Cessna 421B · Propeller Hub SectionSDR 97ZZZX450Wheel · crackedTHREE INCH LONG CRACK FOUND IN WHEEL RIM.Dec 24, 1996 · N65AE · Cessna 421B · Wheel/Ski/FloatSDR 97ZZZX3Bellcrank · brokenAFTER LANDING THE A/C, THE PILOT NOTICED THAT THE RT IB MLG DOOR WAS NOT CLOSED. AFTER INSPECTION OF THE AIRCRAFT, THE MAIN GEAR DOOR IDLER BELLCRANK WAS FOUND BROKEN. NO OTHER DAMAGE TO THE RETRACTION LINKAGE WAS NOTED. IF THIS PROBLEM HAD NOT BEEN NOTICEDDec 20, 1996 · N100DG · Cessna 421B · Landing Gear Door Retract SectionSDR EY2R9601681Cylinder · scoredPROP ASSY CYLINDER I.D. SCOREDDec 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9601672Cylinder · scoredPROP ASSY CYLINDER I.D. SCOREDDec 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9601273Nut · corrodedNUT CORRODED.Dec 1, 1996 · Cessna 421B · Propeller AssemblySDR CA970106008Wheel Half · cracked(CAN) CREW NOTED WHEEL NOISE ON LANDING. INVESTIGATION REVEALED THE INBOARD WHEEL HALF CRACKED AT THE BEAD FLANGE, APPROXIMATELY 4 INCHES LONG.Nov 21, 1996 · Cessna 421B · Wheel/Ski/FloatSDR 96ZZZX5947Gear Shaft · wornSTARTER ADAPTER SHAFT GEAR WAS REMOVED FOR INSPECTION AND FOUND TO BE WORN BEYOND ACCEPTABLE LIMITS IAW CSB94-4A.Nov 20, 1996 · N511LC · Cessna 421B · Reciprocating Engine Rear SectionSDR 96ZZZX5955Gear Shaft · wornSTARTER ON THE RIGHT ENGINE BEGAN TO WORK INTERMITTENTLY. THE PILOT SAID THE STARTER HAD BEEN TURNING SLOW AND MAKING NOISE. WHEN THE STARTER WAS REMOVED AND TESTED, IT WORKED FINE. THE STARTER ADAPTER SHAFT GEAR WAS REMOVED AND FOUND TO BE WORN BEYOND ACCENov 7, 1996 · N707DM · Cessna 421B · Reciprocating Engine Rear SectionSDR 96ZZZX5560Injector · misdrilledWHILE PERFORMING REPAIR IN ADJACENT AREA, FUEL STAINS WERE NOTED AT NR 3 CYLINDER INJECTOR WHERE IT THREADS INTO CYLINDER HEAD. WHILE REMOVING THE INJECTOR, IT BROKE OFF AT THREADS. FURTHER INSP OF INJECTOR REVEALED THE ORIFICE IN THE OUTLET OF THE INJECTOR IOct 4, 1996 · N915DW · Cessna 421B · Fuel Injector NozzleSDR 96ZZZX4982Gasket · crackedAUXILIARY TANK GASKET REPLACED AT FUEL TANK CHANGE. RADIAL CRACKS DEVELOPED CAUSING FUEL LEAK. GASKET REPLACED WITH NEW. NEW GASKET FAILED IN SAME MANNER. CRACKS STARTED AT ALL SCREW HOLES IN GASKETS. REPLACEMENT GASKETS WERE WHAT APPEARED TO BE NEOPRENE.Sep 17, 1996 · N1950G · Cessna 421B · Fuel StorageSDR 96ZZZX4372Alternator · wire brokenRIGHT ALTERNATOR 'FAIL' LIGHT FLICKERED AND CAME ON IN-FLIGHT, ALTERNATOR SHOWED TO HAVE CORRECT OUTPUT. REMOVED SAME WITH ANOTHER. AFTER 38 HOURS, THE REPLACEMENT ALTERNATOR HAD THE SAME PROBLEM. CALLED ELECTRO SYSTEMS AND CONVEYED PROBLEM TO SERVICE REP. Aug 23, 1996 · N41055 · Cessna 421B · DC Generator-AlternatorSDR EY2R9600916Cylinder Pin · corrodedCYLINDER PIN FOUND CORRODED.Aug 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9600915Cylinder Pin · corrodedCYLINDER PIN FOUND CORRODED.Aug 1, 1996 · Cessna 421B · Propeller AssemblySDR 96ZZZX4050Seat · wrong partWHILE PERFORMING ANNUAL INSPECTION, FOUND A FORWARD FACING SEAT INSTALLED IN AN AFT FACING SEAT POSITION. THERE IS A STRUCTURAL DIFFERENCE BETWEEN AN AFT FACING AND A FORWARD FACING SEAT. AD 78-13-05 AND MEB 78-17 REFERENCE THIS, HOWEVER, AD 78-13-05, IS A OJun 26, 1996 · N620TQ · Cessna 421B · Passenger Compartment EquipmentSDR 96ZZZX3576Hub · crackedHUB EDDY CURRENT INSPECTION OF RETENTION THREADS REVEALED A CRACK.Jun 17, 1996 · N421BB · Cessna 421B · Propeller Hub SectionSDR 96ZZZX3575Hub · crackedHUB EDDY CURRENT INSPECTION OF RETENTION THREADS REVEALED A CRACK.Jun 17, 1996 · N421BB · Cessna 421B · Propeller Hub SectionSDR 96ZZZX4953Adapter · failedDURING SCHEDULED OIL CHANGE, A LARGE QUANTITY OF FERROUS PARTICLES WERE FOUND IN OIL FILTER AND ON DRAIN PLUG. INVESTIGATION REVEALED BEARING FAILURE OF STARTER DRIVE ADAPTER. FORWARD PILOT BEARING WAS COMPLETELY GONE AND CASE BORE DAMAGED. AFT BEARING SUPPJun 10, 1996 · N65AE · Cessna 421B · Reciprocating Engine Rear SectionSDR EY2R9601550Hub · defectivePROP HUB HAS PULLED STUDJun 1, 1996 · Cessna 421B · Propeller Hub SectionSDR 96ZZZX3195Bellcrank · brokenRT MLG DOOR OPERATING BELLCRANK BROKEN. ARM THAT CONNECTS TO LINKAGE FOR DOOR BROKE OFF ALLOWING DOOR TO REMAIN OPEN. EVIDENCE OF SMALL PREVIOUS CRACK PRIOR TO FAILURE.May 11, 1996 · N4050Q · Cessna 421B · Landing Gear Door Retract SectionSDR CA960524022Rib · rivets sheared(CAN) LEFT WING OUTBOARD END RIB JOINT TO REAR WING SPAR ATTACH POINT SHEARED BOTH RIVETS. THIS PERMITTED TIP TANK VERTICAL MOVEMENT WHICH LED TO CRACK IN WING SKIN. THIS IDENTICAL PROBLEM IS REPORTED TO HAVE ALSO HAPPENED IN A 414 AND THE SUBMITTER SUGGESTS TMay 10, 1996 · Cessna 421B · Wing, Rib/BulkheadSDR EY2R9600615Hub · corrodedHUB FOUND CORRODED.May 1, 1996 · Cessna 421B · Propeller Hub SectionSDR EY2R9600614Hub · corrodedHUB FOUND CORRODED.May 1, 1996 · Cessna 421B · Propeller Hub SectionSDR 96ZZZX3574Hub · corrodedINSPECTION FOUND CORROSION THROUGHOUT HUB. RECOMMEND ROUTINE MAINTENANCE.May 1, 1996 · N421SM · Cessna 421B · Propeller Hub SectionSDR AU960674Pump · failed(AUS) RH ENGINE DRIVEN FUEL PUMP FAILED DUE TO FODApr 25, 1996 · Cessna 421B · Engine Fuel PumpSDR 96ZZZX2426Hub · crackedINSPECTION FOUND BLADE SOCKET THREADS CRACKED.Apr 19, 1996 · N112SW · Cessna 421B · Propeller Hub SectionSDR EY2R9600520Feather Cylinder · corrodedFEATHER CYLINDER FOUND CORRODED.Apr 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9600519Nut · corrodedNUT FOUND CORRODED.Apr 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9600050Hub · crackedINSP FOUND PROP HUB CRACKEDApr 1, 1996 · Cessna 421B · Propeller Hub SectionSDR 96ZZZX1940Rib · crackedTWO CRACKS IN WING RIB AT MLG SIDE BRACE ATTACHMENT AREA WHERE UPLOCK PUSH/PULL TUBE GOES THROUGH RIB. CESSNA SB ME76-2 ADDRESSES THIS PROBLEM.Mar 22, 1996 · N53685 · Cessna 421B · Wing, Rib/BulkheadSDR EY2R9601445Blade · damagedBLADE SN B20325YS, THREADS SCRATCHEDMar 1, 1996 · Cessna 421B · Propeller Blade SectionSDR EY2R9600452Blade Act Pin · corrodedBLADE ACT PIN CORRODED.Mar 1, 1996 · Cessna 421B · Propeller AssemblySDR EY2R9600451Cylinder Pin · corrodedCORROSION FOUND ON CYLINDER PIN.Mar 1, 1996 · Cessna 421B · Propeller AssemblySDR 96ZZZX1526Bellcrank · failedNOSE LANDING GEAR FAILED TO EXTEND DUE TO FAILURE OF NOSE GEAR RETRACTION BELLCRANK. SUSPECT CAUSED BY NOSE STRUT DEFLATION EITHER PRIOR TO TAKEOFF, DURING TAXI, OR AFTER TAKEOFF WHICH ALLOWED THE STRUT TO STAY COMPRESSED ON RETRACTION AND GEAR CONTACTED PARTFeb 28, 1996 · N42AG · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 96ZZZX1939Bracket · brokenDURING REMOVAL OF OXYGEN BOTTLE FOR HYDROSTATIC TEST, MECHANIC FOUND THE NOSE GEAR LT DRAG BRACE SUPPORT BRACKET BROKEN. AFTER FURTHER INSPECTION, NO OTHER DAMAGE FOUND. ALSO, THERE WERE SEVERAL FLAT SPOTS ON NOSE TIRE. SUBMITTER SUSPECTS THIS HAPPENED DURIFeb 26, 1996 · N5414J · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 96ZZZX851Crankcase · crackedUPON INSPECTION IAW AD 77-13-22 CRANKCASE CRACKS, CRACK FOUND AT NR 3 CYLINDER UPWARDS UNDER ENGINE DATA PLATE, LENGTH UNDETERMINED, BUT LEAKING OIL MAKES UNAIRWORTHY. ENGINE REMOVED FROM LEFT POSITION. ENT TT, 3,334.2 HOURS. ENG TSMOH, 916.3 HOURS. NOTE: Jan 17, 1996 · N7560Q · Cessna 421B · Reciprocating Engine Power SectionSDR 96ZZZX583Bushing · crackedUPON REMOVAL OF NR 6 CYLINDER, THE CONNECTING ROD PISTON PIN BUSHING WAS FOUND CRACKED.Jan 10, 1996 · N707SP · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 96ZZZX577Cylinder · coating failedINSPECTION FOUND CERMINIL CYLINDER PROCESS HAS FAILED. PARTICLES COMING LOOSE IN SMALL PIECES. CONTAMINATION IS PASSING THROUGH ENTIRE OIL SYSTEM. BEARINGS ARE DAMAGED BEYOND FURTHER USE. CAMSHAFT AND LIFTERS ARE DAMAGED. SUBMITTER STATED ALL ACCESSORIES Jan 10, 1996 · N707SP · Cessna 421B · Reciprocating Engine Cylinder SectionSDR EY2R9600264Feather Cylinder · corrodedPROP ASSY FEATHER CYLINDER IS CORRODEDJan 1, 1996 · Cessna 421B · Propeller AssemblySDR 95ZZZX7015Relay · stuckCONTACT STUCK IN CLOSED POSITION AFTER ENGINE STARTED CAUSING STARTER TO OVERHEAT AND SHORT OUT. SHORT CAUSED BATTERY TERMINAL TO MELT OFF. TOTAL ELECTRICAL FAILURE FOLLOWED.Nov 24, 1995 · N421NP · Cessna 421B · DC Generating SystemSDR 96ZZZX1523Crankcase Nut · crackedPILOT REPORTED OIL PRESSURE FLUCTUATION DURING FLIGHT, BUT NEVER OUT OF GREEN ARC. UPON LANDING, NOTED ENGINE HAD HAD A MAJOR OIL LEAK. UPON INVESTIGATION, FOUND ONE OF THE THROUGH-BOLT NUTS HAD CRACKED, THIS WAS LOCATED ON THE FWD LOWER PART OF THE CASE. TNov 20, 1995 · N400BJ · Cessna 421B · Reciprocating Engine Power SectionSDR 95ZZZX6383Cylinder · crackedFOUND THREE CYLINDERS CRACKED BETWEEN THE SPARK PLUG AND INJECTOR HOLES. SUBMITTER STATED CRACKS MAY BE CAUSED BY OVERTORQUING THE INJECTOR NOZZLES OR POSSIBLY EXCESSIVE VIBRATION.Oct 17, 1995 · N3380Q · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 95ZZZX6381Piston · wrong partFOUND 11 OUT OF 12 CYLINDERS WITH THIS P/N PISTON WHICH IS NOT APPROVED FOR USE IN GTSIO520 ENGINES. PISTONS WERE SENT FROM ECI AS PART OF A GTSIO-520 CYLINDER ASSY. P/N 632585 CYLINDER IS DOMED WITH NO STEEL INSERT FOR THE TOP RING GROOVE. THE CORRECT PISTOct 17, 1995 · N3380Q · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 95ZZZX6059Actuator · pin shearedPILOT EXPERIENCED RAPID RPM INCREASE ON THE RIGHT ENGINE WHEN PROP SYNC ENGAGED. PILOT THEN SHUT OFF PROP SYNC AND CONTROLLED RPM MANUALLY, BUT REPORTED THE RIGHT PROP LEVER TO BE OUT OF RIG WITH THE LEFT AND WOULD NOT GO FULL TRAVEL. INVESTIGATION REVEALED Oct 10, 1995 · N1950G · Cessna 421B · Propeller Synchronizer SectionSDR 95ZZZX5929Contact Assy · brokenDURING PRE-FLIGHT ENGINE CHECK, PILOT NOTED THE RIGHT MAGNETO ON THE LEFT ENGINE DEAD. MECHANIC REMOVED MAGNETO AND DISCOVERED THE CONTACT ASSY CAM FOLLOWER ARM BROKE JUST FORWARD OF THE SECURING SCREW. CAUSE OF BREAK UNKNOWN.Sep 25, 1995 · N421BP · Cessna 421B · Magneto/DistributorSDR 95ZZZX5029Torque Tube · brokenLEFT GEAR WELL MLG TORQUE TUBE FOUND BROKEN. SUBMITTER RECOMMENDS THIS PART BE REMOVED AND MAGNAFLUXED AT 5,000 HOURS AND EACH 1,000 HOURS THEREAFTER, ON ALL AFFECTED AIRCRAFT.Aug 16, 1995 · N421HW · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 95ZZZX4495Propeller · misoverhauledOWNER COMPLAINED OF PROPELLER VIBRATIONS. THE PROPELLER WAS REMOVED AND SENT TO OUR FACILITY FOR TRACK AND BALANCE CHECK. FOUND BLADE ANGLE SPREAD .4 DEGREES. REMOVED CYLINDER TO INVESTIGATE AND FOUND OIL QUANTITY VERY LOW. REMOVED OIL AND FOUND PROPELLER AAug 11, 1995 · N421CR · Cessna 421B · Propeller AssemblySDR 95ZZZX4308Fork Assy · crackedFOUND CRACK IN FORK END AT ELEVATOR ATTACH POINT. CRACK RADIATED FROM THREADS AND ALONG THE BOTTOM. THE CRACK WAS NOT VISABLE UNTIL ROD REMOVED FOR OTHER MAINTENANCE.Jul 14, 1995 · N70MC · Cessna 421B · Elevator Control SystemSDR 95ZZZX3131Piston Pin · wrong partAFTER REMOVAL OF NR 5 CYLINDER DUE TO LOW COMPRESSION (PAST THE RINGS), NOTED THE PISTON PIN WAS SHORTER THAN USUAL. FROM ITS APPEARANCE, IT WAS FROM A SMALLER BORE CYLINDER LIKE AN O-470. SHORT PINS WERE ALSO FOUND IN NR 3, NR 4, AND NR 6.May 31, 1995 · N1587G · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 95ZZZX2946Intake Tube · crackedON 100-HOUR INSPECTION, FOUND FUEL STAIN NR 6 INT PIPE - FOUND CRACKED 60 PERCENT OF FLANGE - REPLACED WITH NEW PN 633728 TUBE - THIS ENG HAS 684 HRS SINCE O/H AND APPEARS TO BE A SPRAY CAN OVERHAUL.May 30, 1995 · N44811 · Cessna 421B · Reciprocating Engine Cylinder Section
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