Cessna 421B

Service difficulty reports · 210

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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 = '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 2001FA0000468Gear · damagedON FINAL, THE FLAPS MADE A LOUD POPPING SOUND. REMOVE FLAP ACTUATOR AND FOUND THAT THE GEAR BOX HAD ONE GEAR WITH THE TEETH MISSING.Mar 29, 2001 · N421HM · Cessna 421B · Trailing Edge Flap ActuatorSDR 20010403CW012Rod · departedAIRCRAFT ARRIVED WITH RIGHT ENGINE OIL LEAK. FOUND OIL LINE TO BE LEAKING. REPAIRED OIL LINE AND SERVICED BACK UP WITH OIL. ENGINE WAS RERUN AND A ROD CAME LOOSE AND PENETRATED THE CRANKCASE. NO OTHER INFORMATION WAS RECEIVED, EXCEPT THAT THE ENGINE RAN OUFeb 24, 2001 · N5988M · Cessna 421B · Reciprocating Engine Power SectionSDR CA010213006Cylinder Head · cracked(CAN) AT 100 HOUR INSPECTION IN NOVEMBER 2000, FOUND FOUR CYLINDERS WITH SIMILAR CRACKS. AT NEXT 100 HOUR INSPECTION IN JANUARY 2001 FOUND SIX MORE CYLINDERS WITH CRACKS IN SAME LOCATION (BETWEEN SPARK PLUG HOLE AND INJECTOR HOLE). CYLINDERS REPLACED AFTER DETJan 26, 2001 · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 20010125CW008Cylinder · crackedPILOT NOTICED RT ENGINE WAS RUNNING ROUGH. SHUT DOWN ENGINE, DURING INSPECTION FOUND THAT NR5 CYLINDER WAS COLD, WITH COMPRESSION TEST, RESULTS WAS 0/80. FOUND EXHST STUD AND NUT MISSING, ALSO REVEALED BURN MARKS FROM EXHST AND MANY CRACKS AROUND EXHST PDec 18, 2000 · N8004Q · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 20001031SH027Torque Tube · crackedLEFT MAIN LANDING GEAR WOULD NOT RETRACT. FOUND LARGE CRACK AT LEFT MAIN LANDING GEAR TORQUE TUBE. NOTHING ABNORMAL WITH GEAR RIGGING, CRACKED FROM STRESS OF CONTINUED USE. REPLACED TORQUE TUBE WITH NEW FROM FACTORY. RECHECKED LANDING GEAR RIGGING PER CESSSep 21, 2000 · N3372Q · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 20000831SH020Adapter · wornREMOVED STARTER ADAPTER FROM LEFT POSITION FOR VISUAL INSPECTION PER TCM CRITICAL SB NR CSB94-4C, PART 3. FOUND UNACCEPTABLE HEAVY WEAR, SPALLING AND PITTING FULL TOOTH WIDTH PER FIGURE 6. (X)Aug 8, 2000 · N41106 · Cessna 421B · Engine StarterSDR 20000831SH019Adapter · wornREMOVED STARTER ADAPTER FROM RIGHT POSITION FOR VISUAL INSPECTION PER TCM CRITICAL SB NR CSB94-4C, PART 3. FOUND UNACCEPTABLE HEAVY WEAR, SPALLING AND PITTING FULL TOOTH WIDTH. (X)Aug 8, 2000 · N41106 · Cessna 421B · Engine StarterSDR 20000802SH029Bolt · brokenHEAD OF BOLT BROKE OFF ALLOWING THE REMAINDER OF THE BOLT TO SLIDE OUT. WHEN THE BOLT SLID OUT AND WAS ONLY ON ONE OF THE LUGS ON THE MAIN GEAR TRUNNION, THE LUG FAILED. (THERE ARE TWO LUGS ON THE TRUNNION). (X)Jul 21, 2000 · N5987M · Cessna 421B · Nose/Tail Landing Gear Attach SectionSDR 20000531SH005Case · crackedCASE CRACKED ON LEFT HALF UPPER AT BACK ABOVE SPLIT, THE 5TH BOLT FROM REAR. (X)Apr 19, 2000 · N4050Q · Cessna 421B · Reciprocating Engine Power SectionSDR 20000424SH014Fuel Line · corrodedDURING ANNUAL INSP, RT WING AUXILIARY TRANSFER PUMP PRESS SWITCH THAT OPERATES RT AUX PUMP ANNUNCIATOR LIGHT, WAS FOUND TO HAVE LIGHT FUEL STAINING AROUND BASE OF MICROSWITCH. AFTER REMOVING PRESS SWITCH ASSY (DUE TO CONDITION OF LEFT ONE), FOUND PIPE THREADApr 3, 2000 · N421SE · Cessna 421B · Aircraft Fuel Distribution SystemSDR 20000407SH004Brake Assy · damagedON LANDING, RT SCISSOR ASSY SEPARATED WHEN BRAKE HOSE CLAMP BROKE, BUSHING AND BOLT PULLED THROUGH SCISSOR ASSY. RE-ASSEMBLED SCISSOR ASSY WITH NEW BUSHING AND HOSE CLAMP, INSTALLED WASHERS ON BOLT AND NUT SIDE OF SCISSORS TO PREVENT THIS PROBLEM. THE WASHERJan 27, 2000 · N13HB · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 2000ZZZX232Nut · crackedFOUND LOWER FORWARD ENGINE CASE THROUGH-BOLT NUT (LEFT) CRACKED ENTIRELY THROUGH. THIS IS THE NEW TWELVE POINT FLANGED NUT REQUIRED BY TELEDYNE CONT M92-9.Nov 18, 1999 · N500AB · Cessna 421B · Engine (Turbine/Turboprop)SDR 99ZZZX4412Gear · damagedSTARTER ADAPTER SHAFT GEAR AT BEARING END IN ENGINE AND NEEDLE BEARING IN ENGINE DAMAGED. NO EVIDENCE OF LACK OF LUBRICATION. NEEDLE BEARING DESTROYED AND CASE DAMAGED. SUBMITTER STATED THIS IS THE THIRD FAILURE OF THE EQ6642 ADAPTER IN THE LAST 2 YEARS.Nov 16, 1999 · N421KP · Cessna 421B · Engine StarterSDR 99ZZZX4414Guide · failedNR 5 EXHAUST VALVE GUIDE FAILED AND ALLOWED CRANKCASE PRESSURE TO BLOW OIL OUT THE BREATHER. VALVE GUIDE PARTICLES DAMAGED TURBO. CHANGED CYLINDER AND TURBO. ENGINE CONVERTED TO 1,600 TBO BY STC 09059SC AT WESTERN SKYWAYS.Oct 29, 1999 · N420GC · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 99ZZZX4415Slip Joint · deformedMAIN EXHAUST SLIP JOINT WAS BULGED AND DEFORMED INTERNALLY, NOT REAL VISIBLE FROM OUTSIDE. SLIP JOINT WOULD NOT MOVE IN EITHER DIRECTION. REPLACED WITH K9910314.1. THE BAD SLIP JOINT WAS A SEALLESS TYPE PART NR 8, MFG UNKNOWN.Oct 26, 1999 · N420GC · Cessna 421B · Engine Collector/Tailpipe/NozzleSDR 99ZZZX3654Adapter · failedJUST AFTER TAKEOFF, PILOT NOTICED OIL COMING OUT OF THE RIGHT ENGINE COWL AND RETURNED TO THE AIRPORT. OIL WAS FOUND COMING FROM THE STARTER DRIVE ADAPTER DAMPER. ENGINE WAS REMOVED AND SENT TO OVERHAUL FACILITY. ON TEAR-DOWN THE ADAPTER BEARING WAS FOUND TSep 9, 1999 · N678DB · Cessna 421B · Engine CrankingSDR CA990907007Crankshaft · failed(CAN) NR 2 CON ROD FAILURE DUE TO OIL STARVATION. OIL JOURNAL INTEGRITY LOOSE WHICH COULD HAVE CAUSED THE ROD BEARING FAILURE.Aug 16, 1999 · Cessna 421B · Reciprocating Engine Power SectionSDR CA990907005Adapter Gear · stripped(CAN) STARTER ADAPTER GEAR STRIPPED CAUSING FURTHER DAMAGE TO CRANKSHAFT GEAR.Aug 12, 1999 · Cessna 421B · Starter-GeneratorSDR 99ZZZX2975Window · separatedPILOT PRESSURIZED AIRCRAFT AT 14,000 FEET WHEN THE COPILOT'S WINDSHIELD BLEW OUT. AN UNEVENTFUL LANDING WAS MADE. WHEN THE WINDSHIELD RETAINER WAS REMOVED, IT APPEARED THAT THERE WERE SEVERAL CRACKS EMANATING FROM SEVERAL SCREW HOLES. IT ALSO APPEARED THAT Jul 15, 1999 · N7549Q · Cessna 421B · Flight Compartment WindowsSDR 99ZZZX2982Pin · looseTHE IDLER GEAR SUPPORT PIN WAS FOUND LOOSE AND BACKED OUT OF THE CRANKCASE CAUSING THE IDLER GEAR TO BE OUT OF POSITION DISCONNECTING THE DRIVE TRAIN TO THE MAGNETOS WHICH CAUSED AN IMMEDIATE TOTAL LOSS OF POWER. THERE WAS ALSO EXTENSIVE DAMAGE TO THE TEETH OJun 18, 1999 · N5943M · Cessna 421B · Reciprocating Engine Power SectionSDR AU991078Nut · loose(AUS) ENGINE FUEL VAPOR RETURN LINE LOCATED IN THE RIGHT WING LEADING EDGE HAD A LOOSE CONNECTION NUT. FUEL VAPORS EXPLODED CAUSING DAMAGE TO THE RIGHT WING LEADING EDGE.Apr 30, 1999 · Cessna 421B · Aircraft Fuel Distribution SystemSDR AU990430010Bearing · failed(AU) NR 2 MAIN BEARING FAILURE, POSSIBLY CAUSED BY FRETTING OF THE CRANKCASE HALVES. THIS FAILURE ALSO CAUSED TWO MAJOR CRACKS IN THE CRANKSHAFT, RADIATING OUT FORWARD AND AFT OF THE OIL HOLE AND NUMEROUS SURFACE CRACKS ON THE FACE OF THE MAIN JOURNAL.Apr 30, 1999 · Cessna 421B · Reciprocating Engine Power SectionSDR 99ZZZX2184Adapter · making metalFOUND RT ENGINE OIL FILTER CONTAMINATED WITH METAL. METAL COMING FROM STARTER ADAPTER BEARING HOUSING. KIT QE6642 INSTALLED BY FACTORY, ALSO CSB 94.4 REPETITIVE INSPECTION N/A PER LOG BOOK. INSPECTED LT ENGINE PER CSB 94-4. OK AT THIS TIME.Mar 27, 1999 · N1942G · Cessna 421B · Reciprocating Engine Rear SectionSDR CA990119020Flyweight Disc · cracked(CAN) DURING NDT INSPECTION, A CRACK WAS FOUND IN THE FLYWEIGHT DISC, CRACK GOING FROM OUTER EDGE TO INBOARD EDGE.Jan 13, 1999 · Cessna 421B · Propeller GovernorSDR CA990119019Idle Gear · cracked(CAN) DURING NDT INSPECTION, A CRACK WAS FOUND IN THE IDLE GEAR.Jan 13, 1999 · Cessna 421B · Propeller Controlling SystemSDR 99ZZZX90Pump · inoperativeFUEL RE-CIRCULATING PUMPS IN LEFT AND RIGHT TIP TANKS INOPERATIVE. BOTH PUMPS REPLACED WITHIN THE LAST 15 MONTHS.Nov 30, 1998 · N421KP · Cessna 421B · Engine Fuel PumpSDR 98ZZZX4507Case · crackedCASE CRACKED BELOW NR 3 CYLINDER TOP STUD SECOND FROM THE FRONT. FOUND DURING CYLINDER REMOVAL TO REPLACE BASE SEAL. CRACK ABOUT .50 INCH LONG.Nov 10, 1998 · N421UP · Cessna 421B · Reciprocating Engine Power SectionSDR 98ZZZX3443Valve · mismanufacturedDURING A PHASE INSPECTION, FOUND RIGHT ENGINE NR 5 CYLINDER LOW COMPRESSION 20/80, LEAKING BY INTAKE VALVE. REMOVED CYLINDER AND FOUND INTAKE VALVE HAD APPROXIMATELY .005 INCH RIDGE COMPLETELY AROUND VALVE ABOVE SEAT. SUSPECT VALVE WAS NOT PROPERLY HARDENED Sep 4, 1998 · N678DB · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 98ZZZX4005Bellcrank · brokenRIGHT MAIN GEAR DOOR WAS FOUND HANGING OPEN UPON POST-FLIGHT INSPECTION. THE DOOR BELLCRANK WAS FOUND BROKEN ON THE DOOR ACTUATOR ARM AND ALLOWED THE DOOR TO OPEN AND NOT OPERATE WITH THE MAIN GEAR LEG.Sep 3, 1998 · N421FM · Cessna 421B · Landing Gear Door Retract SectionSDR BIER9804052Rib · crackedFOUND RIB CRACKED AS REFERENCED IN CESSNA SL ME76-2. INSTALLED KIT SK414-8E.Jul 16, 1998 · N69924 · Cessna 421B · Fuselage Main, BulkheadSDR 98ZZZX2649Rocker Shaft · failedLEFT ENGINE ROUGHENED IN-FLIGHT, HAD TO BE SHUT DOWN. SAFE LANDING MADE. MAINTENANCE FOUND NR 4 CYL EXHAUST PUSH ROD PUSHED THROUGH VALVE COVER. FOUND ROCKER SHAFT BOLTS BROKEN. CAUSE OF FAILURE BELIEVED TO BE FROM UNDERTORQUE AND IMPROPER SETTING OF BOLT Jun 24, 1998 · N601PB · Cessna 421B · Reciprocating Engine Cylinder SectionSDR AU980495Landing Gear · separated(AUS) AIRCRAFT CRASHED ON LANDING. NOSE LANDING GEAR AND RT MAIN LANDING GEAR TORN FROM THE AIRCRAFT. BOTH PROPELLERS STRUCK THE GROUND.May 1, 1998 · Cessna 421B · Landing Gear SystemSDR AU980314Trunnion · cracked(AUS) LT MAIN LANDING GEAR TRUNNION FORWARD MOUNTING SUPPORT CRACKED. RT MAIN LANDING GEAR TRUNNION SHOWS SIGNS OF A SIMILAR DEFECT.Mar 26, 1998 · Cessna 421B · Main Landing Gear Strut/Axle/TruckSDR CA980406038Bolt · broken(CAN) DURING ANNUAL INSPECTION IT WAS FOUND THAT ONE ALTERNATOR THROUGH BOLT HAD BROKEN OFF PART WAY UP THE THREAD AREA JUST OUTSIDE OF THE END FRAME CASTING. THIS SAME ALTERNATOR HAD ANOTHER BOLT FAIL AT APPROXIMATELY 10 HOURS. BOLTS REPLACED WITH OEM STOCK.Mar 25, 1998 · Cessna 421B · DC Generator-AlternatorSDR CA980529002Exhaust Stack · damaged(CAN) EXHAUST BLEW OUT THE BOTTOM OF THE EXHAUST STACK (PIPE).Mar 17, 1998 · Cessna 421B · Engine Collector/Tailpipe/NozzleSDR 98ZZZX1323Tube · failedA FUEL DISCHARGE TUBE ASSY FROM THE FUEL MANIFOLD VALVE TO THE NR 2 CYLINDER FUEL INJECTOR NOZZLE WAS FOUND BROKEN AT THE BALL END FITTING INSIDE OF THE BRASS RETAINING NUT ON THE FUEL MANIFOLD END. SUBMITTER STATED NO OBVIOUS CAUSE OF FAILURE, HOWEVER, AGE FMar 1, 1998 · N5943M · Cessna 421B · Engine Fuel DistributionSDR CA980529004Crank · failed(CAN) RIGHT MLG DOOR WOULD NOT CLOSE - FOUND CRANK ASSY BROKEN AT WELD WHERE SHAFT MEETS ARM. REPLACED.Feb 25, 1998 · Cessna 421B · Landing Gear Door Retract SectionSDR CA980519005Valve · broken(CAN) ENGINE SHUTDOWN IN CRUISE AND THE AIRCRAFT MADE AN UNSCHEDULED LANDING, AFTER THE ENGINE EXPERIENCED ROUGH RUNNING. POST-FLIGHT INSPECTION FOUND AN EXHAUST VALVE WITH THE HEAD DETACHED/FRACTURED. THE PISTON AND CYLINDER WERE DESTROYED AND THE OIL PAN WFeb 5, 1998 · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 98ZZZX641Bellcrank · crackedRIGHT MLG DOOR BELLCRANK CRACK APPEARED TO START AT UPPER FORWARD. SUBMITTER STATED WAS CRACKED FOR SOME TIME BEFORE FAILURE.Jan 19, 1998 · N421CP · Cessna 421B · Landing Gear Door Retract SectionSDR 98ZZZX138Bolt · failedDURING ROUTINE 50-HOUR EXHAUST SYSTEM INSPECTION, NOTED BOLT AT RIGHT SIDE FORWARD LOWER CRANKCASE JUST ABOVE OIL PAN STICKING OUT AND TOUCHING EXHAUST CROSS-OVER TUBE. REMOVED TUBE, FOUND HEAD OF BOLT POPPED OFF. BOLT HEAD OR WASHER PN 401507 COULD NOT BE LDec 23, 1997 · N869CB · Cessna 421B · Reciprocating Engine Power SectionSDR 98ZZZX95Turbocharer · leakingOIL SEAL IN TURBOCHARGER FAILED CAUSING SMOKE TO ENTER CABIN. TURBOCHARGER, TOTAL TIME, 1,764.0 HOURS.Dec 18, 1997 · N1965G · Cessna 421B · Exhaust TurbochargerSDR 99ZZZX576Journal · cloggedTWO OIL JOURNALS IN CRANKCASE CLOGGED CAUSING TWO PISTONS TO FREEZE AND FAIL. ON LEFT SIDE OF CRANKCASE THE PISTON BROKE THROUGH CAUSING A FIST SIZE HOLE ON THE RIGHT SIDE OF THE PISTON BROKE THROUGH CAUSING A SILVER DOLLAR SIZE HOLE.Dec 16, 1997 · N707DM · Cessna 421B · Reciprocating Engine Power SectionSDR 97ZZZX5193Gear Assy · failedFLAPS FAILED TO RETRACT. UPON DISASSEMBLY OF THE FLAP ACTUATOR ASSEMBLY (GEAR REDUCTION DRIVE), THE SHAFT OF PART 5115241-3 WAS FOUND SHEARED JUST FORWARD OF THE GEAR. THIS ALLOWED THE OUTPUT SHAFT TO WOBBLE IN BEARING MS 20201KP8A EVENTUALLY SHEARING ALL OFNov 17, 1997 · N678BB · Cessna 421B · Trailing Edge Flap ActuatorSDR 97ZZZX4379Crankcase · crackedCRANKCASE CRACKED BOTTOM NR 2 CYLINDER ATTACH, AFT .4375 INCH CYLINDER STUD.Oct 1, 1997 · N145ES · Cessna 421B · Reciprocating Engine Power SectionSDR 97ZZZX3384O-Ring · wornLEFT BRAKE INOPERABLE CAUSING PILOT TO LOSE CONTROL AND STRIKE ANOTHER AIRCRAFT. INVESTIGATION FOUND NO FLUID IN BRAKE, CAUSED BY O-RINGS BEING OLD, WORN, AND HARD AND LEAKING. REPLACED O-RINGS AND SERVICED BRAKE SYSTEM. OPERATION WAS NORMAL.Jun 30, 1997 · N41019 · Cessna 421B · Master Cylinder/Brake ValveSDR 97ZZZX3157Alternator · failedALTERNATOR INSTALLED 3-31-97. FAILED 6-24-97. NO OUTPUT. OVERHAULED 2-28-97. SUBMITTER STATED CONTINUE TO GET SHORT SERVICE LIFE FROM AERO ELECTRIC ALTERNATORS.Jun 25, 1997 · N8050Q · Cessna 421B · DC Generator-AlternatorSDR 97ZZZX1863Alternator · failedLEFT ALTERNATOR BECAME INTERMITTENT THEN DROPPED OFF LINE. RETURNED FLIGHT TO YUMA. UNIT HAD BEEN OVERHAULED 1-25-96.Apr 3, 1997 · N4050Q · Cessna 421B · DC Generator-AlternatorSDR 97ZZZX2047Retainer · failedNR 4 CYLINDER INTAKE VALVE RETAINER FAILED. INSPECTED ALL OTHER CYLINDERS, FOUND NO OTHER DEFECTS.Apr 1, 1997 · N5451J · Cessna 421B · Reciprocating Engine Oil SystemSDR 97ZZZX2043Retainer · crackedNR 3 AND NR 4 CYLINDER EXHAUST VALVE RETAINER CRACKED. 1 EACH CYLINDER. INSPECTED ALL OTHER CYLINDERS. NONE FOUND DEFECTIVE.Apr 1, 1997 · N1562G · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 97ZZZX1928Alternator · failedALTERNATOR HAS NO OUTPUT. INSTALLED 164.4 HOURS AGO, 9-96. UNIT WAS RECENTLY OVERHAULED. SUBMITTER STATED SHORT SERVICE LIFE ON THESE UNITS.Mar 28, 1997 · N4050Q · Cessna 421B · DC Generator-Alternator
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