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"

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SDR 2022FA0000351Magneto · defectiveLOSS OF 5 INCHES OF MP AT FL 240 AND INFLIGHT INVESTIGATION SHOWED A ROUGH RUNNING RH MAGNETO. DISCOVERY OF A DEFECTIVE SPARK PLUG LEAD (SEE OTHER SDR) ON A 25 HR TTSN CHAMPION SPARK PLUG HARNESS LED WITH 25 HRS TTSN SPARK CHAMPION RHB32E SPARK PLUGS LED US Jul 14, 2022 · N678DB · Cessna 421B · Magneto/DistributorSDR 2022FA0000319None · failedCRUISE FLIGHT FL 240, 25 HRS SINCE NEW CHAMPION IGNITION HARNESS, BLUE LABEL TCM/CAT BENDIX S6LN-1205 MAGNETO, AND CHAMPION RHB32E SPARK PLUGS AT ENGINE OVERHAUL (25 HRS TTSMOH OF ENGINE). IN CRUISE FLIGHT LOST 5 INCHES OF MP PRESSURE ON NEWLY OVERHAULED RH Jun 24, 2022 · N678D · Cessna 421B · Ignition Harness (Distribution)SDR 2020FA0000406Skin · crackedA CRACK ON THE SKIN AT THE RIGHT WING REAR SPAR AND TRAILING EDGE. THE LOCATION IS AT THE MAIN FUEL TANK REAR SPAR ATTACH POINT. THE CRACK IS CAUSED BY VIBRATION OR LOOSE REAR MAIN FUEL TANK ATTACH BOLT. RECOMMENDED AT EACH ANNUAL INSPECTION, INSPECT THE ARSep 16, 2020 · N780JC · Cessna 421B · Wing, Plate/SkinSDR 2019FA0000402Hinge · corrodedPERFORMED REPAIR WORK ON THE AIRCRAFT FOR LOW CABIN DIFFERENTIAL/PRESSURIZATION. FOUND MANY LEAKS AND REPAIRED. DIFFERENTIAL WAS REPAIRED TO BOOK VALUES. CUSTOMER TOOK POSSESSION OF THE AIRCRAFT AND AFTER SEVERAL FLIGHT HOURS HEARD A POP AND LOST SOME PRESSURIDec 10, 2019 · N5448J · Cessna 421B · Fuselage, Door HingeSDR CA180925012Support · loose(CAN) AIRCRAFT SUFFERED AN UNCOMMANDED RIGHT ENGINE SHUT DOWN APPROXIMATELY 10 MINUTES INTO THE FLIGHT, PILOT EXECUTED AND ENGINE OUT SHUT DOWN AND FEATHERED THE PROPELLER, THEN DIVERTED. ON OPENING THE RIGHT ENGINE COWLS THE FOLLOWING WAS FOUND: THE TWO RETASep 22, 2018 · Cessna 421B · Reciprocating Engine Rear SectionSDR 2017FA0000635Magneto · faultyHAD ONE ROUGH MAG CHECK AND 2 GOOD MAG CHECKS PRIOR TO FLIGHT. REDUCED POWER IN CLIMB AND MAG CHECK REVEALED NO SPARK ON LT MAGNETO. RETURNED TO AIRPORT. REMOVED IGNITION HARNESS FROM MAG AND NOTICED LOTS OF METAL FLAKES UNDER THE COVER OF THE MAG. THIS ENGNov 15, 2017 · N4AD · Cessna 421B · Magneto/DistributorSDR YN8R2017032400001Pivot · brokenFOUND PILOTS SEAT LT PIVOT ARM BROKEN. REPLACED PIVOT ARM IAW SERVICE MANUAL (REV 15) SECTION 3.Mar 24, 2017 · N104WM · Cessna 421B · Flight Compartment EquipmentSDR YN8R201606300001Piston · crackedWHEN OIL FILTER WAS SECTIONED FOR CHECK FOR CONTAMINATION, LARGE CHIPS OF ALUMINUM WERE NOTED. SENT OIL FILTER TO AVIATION OIL ANALYSIS LABS AND CONTACTED ENGINE MFG FOR GUIDANCE. REMOVED AND INSPECTED OIL PUMP, NO DEFECTS FOUND. REMOVED VALVE TRAIN AND BORJun 30, 2016 · N50DL · Cessna 421B · Reciprocating Engine Cylinder SectionSDR YN8R201511090001Torque Tube · corrodedWHILE REPAIRING RUDDER DUE TO WIND DAMAGE, FOUND RUDDER TORQUE TUBE, PN 5133011-9 TO BE BADLY CORRODED. REPLACED WITH NEW.Nov 9, 2015 · N44KF · Cessna 421B · Rudder Control SystemSDR 2014FA0000721Screw · shearedRPM AND MANIFOLD PRESSURE STARTED FLUCTUATING FOR THE RT ENGINE. WHITE SMOKE FROM TURBO CHARGER VENTS WAS NOTED AS WELL AS OIL STREAKS NOTED. OIL PRESSURE DROPPED TO BOTTOM OF GREEN ARC ON THE OIL PRESSURE GAGE. EMERGENCY PROCEDURE CHECKLIST CALLED FOR ENGIDec 25, 2014 · N21WT · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2014F00153Connector · unsecureLOST PANEL LIGHTS AND INDICATIONS DURING LANDING. TROUBLESHOT SYSTEM AND FOUND THAT A CONNECTOR PLUG CONTAINING THE POWER AND GROUND LEADS HAD COME LOOSE. TIGHTEN AND SECURED CONNECTOR PLUG OPS CHECK SYSTEM WITH NO DEFECTS FOUND AT THIS TIME.Sep 16, 2014 · N522BA · Cessna 421B · Instrument System WiringSDR 2014F00141Adapter · failedDURING INSPECTION, AFTER ENGINE INFLIGHT SHUTDOWN FOUND THE RT ENGING STARTER ADAPTER GEAR SPLINES WERE DAMAGED CAUSING FURTHER DAMAGE TO THE CRANK SHAFT DRIVE GEAR AND THE CAM SHAFT DRIVE GEAR. THE CRANK SHAFT DRIVE GEAR ALSO DRIVES THE CAM SHAFT AS WELL AS Jul 31, 2014 · Cessna 421B · Engine CrankingSDR 2012FA0000596Clamp · crackedTURBOCHARGER TURBINE TO TAILPIPE V BAND CLAMP, FOUND TO HAVE A 3" LONG CRACK ALONG THE OUTER PERIMETER OF THE V BAND. CRACK SEPARATION WAS LESS THAN .0625" AT THE WIDEST POINT. THIS IS NOT A MULTI-SEGMENT V BAND. NO EXHAUST LEAK EVIDENT. DISCOVERED DURING Aug 24, 2012 · N678DB · Cessna 421B · Exhaust TurbochargerSDR CA120417008Actuator · malfunctioned(CAN) DURING ASSY OF THE RUDDER TRIM ACTUATOR IT WAS NOTED THAT THE AFT BEARING SURFACE ON THE EXTERNAL SCREW, PN: 5815023-7 FROM THE REPAIR KIT, PN: 5115275-201 IS TOO SHORT. THE ACTUATOR WAS HAS NOT BEEN ASSEMBLED AS OF YET, SO THE CLEARANCE SPECIFIED IN THApr 17, 2012 · Cessna 421B · Rudder Tab Control SystemSDR CA120207001Bellcrank · broken(CAN) AFTER LANDING, PARKING AND SHUTDOWN THE PILOT NOTICED THE RT LANDING GEAR INBD DOOR HANGING OPEN. MAINTENANCE DISCOVERED THE INBD WHEEL WELL BELLCRANK CASTING ARM FOR THE INBD GEAR DOOR OPERATION HAD SNAPPED OFF. UPON CLOSER EXAMINATION IT COULD BE SEEJan 29, 2012 · Cessna 421B · Landing Gear Door Retract SectionSDR YWYR201209158826Spark Plug · crackedPILOT REPORTED HIGH RPM DROP DURING MAGNETO DROP OFF CHECK. ISOLATED PROBLEM TO NR 5 CYLINDER BY USE OF GRAPHIC ENGINE MONITOR. REMOVED ALL SPARK PLUGS AND FOUND 1 SPARK PLUG ON NR 5 CYLINDER HAD CRACKED INSULATOR TIP. INSTALLED NEW SPARK PLUG. GROUND RUN Nov 8, 2011 · N1946G · Cessna 421B · Spark Plug/IgniterSDR EG6R2011101800769Tube · failedNOSE TIRE BLEW UPON LANDING. UPON DISASSEMBLING TIRE AND WHEEL ASSY, FOUND APPROX 2 INCH HOLE IN TUBE. PROBABLE CAUSE UNKNOWN.Oct 18, 2011 · N5929M · Cessna 421B · Tire TubeSDR 2011FA0000582Gear · shearedPILOT REPORTED IN FLIGHT LOSS OF ALTERNATOR. ACFT LANDED W/O INCIDENT. INVESTIGATION REVEALED ALTERNATOR DRIVE CLUTCH GEAR. MISSING DAMPNER MATERIAL AND ALTERNATOR SHAFT BROKEN AT END OF ARMATURE. CUT OIL FILTER OPEN, FOUND TO BE FULL OF STEEL FILINGS. ALAug 12, 2011 · N71544 · Cessna 421B · DC Generator-AlternatorSDR Z8G2011F00000Thrust Bearing · mismanufacturedPILOT REPORTED EXCESSIVE LOSS OF OIL AND LOW OIL PRESSURE ON RT ENGINE. DISASSEMBLY OF TURBOCHARGER REVEALED THE 3 GROOVES ON THE INBD THRUST BRG WERE MACHINED INCORRECTLY. THEY ARE TOO LARGE TO THE EDGE OF BEARING ALLOWING OIL TO BYPASS. BEARING PIN 40726Jul 28, 2011 · N960EM · Cessna 421B · Exhaust TurbochargerSDR CA110203004Burner Can · cracked(CAN) BURNER CAN CRACKS IN SOUTHWIND COMBUSTION HEATER WITH ONLY 170 HRS SINCE OVERHAUL BY AIRCRAFT HEATING AND ELECTRICAL INC. THIS CAUSED EXHAUST FUMES IN AIRCRAFT CABIN. COMPLETED PRESSURE DECAY TEST ON HEATER WITH FAILED RESULTS. REMOVED HEATER FORM AIRCRAJan 28, 2011 · Cessna 421B · Heating SystemSDR 2010FA0001149Boss · crackedDURING VISUAL INSP OF THE ENGINE DISCOVERED INTERCOOLER AFT MOUNTING BOSS TO BE CRACKED 3/4 OF THE WAY AROUND.Nov 1, 2010 · N1958G · Cessna 421B · Reciprocating Engine Power SectionSDR 2010FA0001147Shaft · crackedPILOT HAD A ROUGH RUNNING ENGINE AND DIFFICULTY CONTROLLING THE ENGINE RPM'S. PILOT SHUTDOWN AND FEATHERED THE RT ENGINE AND LANDED SAFELY. MX PERFORM REPAIR ON PROPELLER CONTROL CABLE AND PROCEEDED TO PERFORM ENGINE RUN. HOWEVER, THE ENGINE WOULD NOT DEVELSep 16, 2010 · N421DP · Cessna 421B · Propeller AssemblySDR 2010FA0000439Gearbox · wornAFTER TAKEOFF GEAR DID NOT FULLY RETRACT. THE RED GEAR IN-TRANSIT LIGHT REMAINED ILLUMINATED. EMERGENCY GEAR EXTENSION WAS PERFORMED AND GOT (3) GREEN INDICATION. RETURNED TO AIRPORT AND PLACED ACFT ON JACKS. RETRACT CHECK PERFORMED AND AFTER GEAR UNLOCKEDApr 30, 2010 · N421PD · Cessna 421B · Landing Gear ActuatorSDR 2010FA0000426Control Cable · looseTHE CONTROL CABLE FOR THE RUDDER WAS UNDER TENSIONED AND THE FAIR LEAD MISSING AT FUSELAGE STA 289.94 CAUSING THE CONTROL CABLE TO SAW INTO THE BULKHEAD .1250" DEEP. THE CABLE TENSION AND CONDITION OF THE RUDDER CONTROL SYS WAS NOT CLOSELY INSPECTED DURING 10Apr 23, 2010 · N22FX · Cessna 421B · Rudder Control SystemSDR 2010FA0000274Clamp · crackedDURING AN ANNUAL INSP, THE CLAMP BETWEEN THE TURBO AND EXHAUST OVERBOARD ON THE LT ENGINE WAS FOUND WITH A 4.5 IN CRACK ALONG THE CIRCUMFERENCE.Mar 9, 2010 · N1944G · Cessna 421B · Exhaust TurbochargerSDR 2009FA0000845Cylinder · crackedREPAIRED CYLINDER FOUND TO BE CRACKED SPARK PLUG TO INJECTOR.Oct 6, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2009FA0000844Cylinder · crackedREPAIRED CYLINDER FOUND TO BE CRACKED SAME PLACE AS OTHERS, SPARK PLUG TO INJECTOR.Sep 19, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR XTTA09030918Autopilot Sys · shortedON APPROACH, A FEW WISPS OF SMOKE WAS SEEN IN THE COCKPIT EMANATING FROM THE PILOT'S SIDE OF THE INSTRUMENT PANEL. AT THE SAME TIME, AN ELECTRICAL SMOLDERING ODOR WAS DETECTED. THE WISPS OF SMOKE CLEARED WITHIN 20 SECONDS AND NO FURTHER SMOKE WAS VISUALIZED.Sep 3, 2009 · N21WT · Cessna 421B · Altitude ControllerSDR CA090819006Fitting · crackedON WALK AROUND BEFORE FLIGHT A VERY SMALL POOL OF FRESH FUEL WAS DISCOVERED DRIPPING FROM BOTTOM OF LT ENG COWL, UPON FURTHER EXAMINATION A BRASS FUEL FITTING IN FUEL CONTROL ASSY. HAD CRACKED IN THE UPPER THREADED PORTION CAUSING FUEL TO LEAK FROM ENG JUST AAug 12, 2009 · Cessna 421B · Engine Fuel DistributionSDR 2009FA0000843Cylinder · crackedREPAIRED CYLINDER FOUND TO BE CRACKEDApr 17, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR W9W2009F00000Windshield · departedWHILE CLIMBING THROUGH 6000 FT, THE PILOT SIDE WINDSHIELD BLEW OUT. PROBABLE CAUSE APPEARS TO BE A CRACK FROM ONE OF THE LWR ATTACH SCREWS THAT PROPAGATED OUT. SOME LOWER ATTACH SCREWS WERE RUSTY. WATER MAY HAVE MIGRATED INTO THE SCREW HOLES AND FROZEN, CAUApr 14, 2009 · N700BR · Cessna 421B · Flight Compartment WindowsSDR 2009FA0000438Bolt · shearedDURING FUEL SYSTEM SETUP, SEVERE OIL LEAK WAS OBSERVED WHICH NECESSITATED UBRUPT SHUTDOWN. UPON FURTHER INSPECTION A HOLE WAS DISCOVERED IN TOP OF NR 4 EXHAUST ROCKER COVER. WHEN COVER WAS REMOVED IT WAS FOUND THAT ROCKER SHAFT RETAINING BOLT HAD SHEARED AT Mar 30, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2009F00016Gearbox · lockedLANDING GEAR WOULD NOT EXTEND ELECTRICALLY OR BY UTILIZING THE EMERGENCY GEAR EXTENSION SYSTEM. THE ACFT LANDED GEAR UP. POST INCIDENT INVESTIGATION WAS CONDUCTED ON SCENE AND A COMPLETE INSPECTION OF THE LANDING GEAR SYS WAS CONDUCTED WITH NO FINDINGS AS TO Feb 24, 2009 · N421LP · Cessna 421B · Landing Gear Retraction/Extension SystemSDR 2009FA0000842Cylinder · crackedECI REPAIRED CYLINDER FOUND TO BE CRACKEDJan 20, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2009FA0000841Cylinder · cracked12/25/08 6 CRACKED TCM CYLINDERS WERE REPLACED.Dec 5, 2008 · N54DR · Cessna 421B · Reciprocating Engine Cylinder SectionSDR CA081212002Bearing · failed(CAN) IN CRUISE PILOT NOTICED SPARKS COMING FROM RT ENGINE. UPON EXAMINATION ON GROUND BY MX, ALTERNATOR OUTER BRG. FAILED. SHAFT DEFORMED FROM HEAT. FAILURE OF CRANKSHAFT ALTERNATOR DRIVE GEAR CAUSED MAJOR INTERNAL ENGINE DAMAGE.Dec 5, 2008 · Cessna 421B · AC Generator-AlternatorSDR 2008FA0000926Control Cable · frayedTT ON CABLES UNKNOWN SUSPECT ORIGINAL. FOUND LT AFT AILERON CABLE FRAYED AT WING STA 59 THE PULLEY WAS FROZEN. INSPECTED REST OF SYSTEM NO DEFECTS FOUND. ON REPLACEMENT OF CABLE FOUND WAS ALSO FRAYED AT WING STA 87.29. THE PULLEYS AT THIS STATION WERE TURNINGDec 1, 2008 · Cessna 421B · Aileron Control SystemSDR 2008FA0000924Control Cable · frayedTT ON CABLES UNKNOWN SUSPECT ORIGINAL. FOUND LT AFT AILERON CABLE FRAYED AT WING STATION 58.94 THE PULLEY WAS FROZEN. INSPECTED REST OF SYSTEM NO DEFECTS FOUND. ON REPLACEMENT OF CABLE FOUND WAS ALSO FRAYED AT WING STA 87.29. THE PULLEYS AT THIS STATION WEDec 1, 2008 · Cessna 421B · Aileron Control SystemSDR 2007FA0001053Lock Plate · missingTHIS ENGINE WAS REMOVED ON AUGUST 31, 2007, HOBBS TIME 1523.9 DUE TO CRACKED ENGINE CASE. THE ENGINE WAS SENT TO RAM AIRCRAFT FOR REPAIR. RAM REPAIRED THE ENGINE ON SEPT 20, 2007. THIS ENGINE WAS REINSTALLED BACK ON THE AIRCRAFT. DURING A NIGHT FLIGHT ON NOVEMNov 30, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front SectionSDR O5W2007F00000Lock Plate · destroyedTHIS ENGINE WAS REMOVED ON AUG 31, 2007, HOBBS TIME 1523.9 DUE TO A CRACKED ENGINE CASE. THE ENGINE WAS SENT FOR REPAIR. REPAIRED THE ENGINE ON SEPT 20, 2007. THIS ENGINE WAS REINSTALLED ON AIRCRAFT. DURING A NIGHT FLIGHT ON NOV 20, 2007 THE PILOT HAD AN ANov 20, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front SectionSDR CA070514024Exhaust Valve · failed(CAN) EXHAUST VALVE HEAD SEPARATED, STRIKING THE INTAKE VALVE AND CAUSING THE INTAKE VALVE TO FAIL. THE HEAD OF THE EXHAUST VALVE LODGED INTO THE EXHAUST PORT. THE INTAKE VALVE HAD (2) PIECES SEPARATE AND ONE LODGED ITSELF INTO THE TOP OF THE NR 1 CYLINDER HEAMay 14, 2007 · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2007FA0000366Gasket · brokenAIRCRAFT DEPARTED ON A CHARTER , PILOT WAS OVER LAKE WHEN HE NOTICED ENGINE OIL COMING OUT OF TOP ENGINE COWLING COOLING LOUVERS. PILOT NOTIFIED CONTROL HE WAS LOSING OIL. FEATHERED THE RT ENGINE AND DIVERTED . PILOT MADE UNEVENTFUL SINGLE ENGINE LANDING ANApr 12, 2007 · N42776 · Cessna 421B · Engine Oil CoolerSDR CA070228008Window · cracked(CAN) DURING MAJOR INSPECTION OF AIRCRAFT, REMOVED PLASTIC UPHOLSTERY COVER ON THE EMREGENCY EXIT HATCH. WINDOW FOUND CRACKED AT ALL LOWER ATTACH SCREW HOLES, ONLY THE SEALANT KEEPING THE WINDOW IN PLACE. (TC NR 20070228008)Feb 8, 2007 · Cessna 421B · Door WindowsSDR 1538T092806Duct · blownCABIN BEGAN TO CLIMB AT 2000 FPM DURING CRUISE AT 12,500 FT. DESCENT TO 10,500 FT. CABIN WOULD ONLY MAINTAIN 2.5 PSID. CHECKED OUTFLOW AND SAFETY VALVES, MOISTURE DRAINS, LANDING GEAR BOOTS, FAILEADS ALL FOUND OK. PERFORM GROUND CHECK OF SYSTEM FOUND NO AUSep 28, 2006 · N1538T · Cessna 421B · Air Distribution SystemSDR 2006F00031Engine · seizedPILOT REPORTED VIBRATION FROM LT ENGINE SHORTLY AFTER TAKEOFF. SECURED ENGINE, RETURNED TO AIRPORT. INITIAL INVESTIGATION FOUND ENGINE SEIZED/LOCKED UP. SUSPECT BROKEN CRANKSHAFT OR CONNECTING ROD. ENGINE RETURNED TO OVERHAUL FACILITY.Jul 18, 2006 · N37676 · Cessna 421B · Engine (Reciprocating)SDR 2006FA0000475Hinge Bracket · elongatedCUSTOMER REPORTED VIBRATION AT HIGH SPEEDS. INSPECTED AIRCRAFT AND FOUND CENTER ELEVATOR HINGE IB AND OB BRACKETS ELONGATED ON THE RT ELEVATOR. INSTALLED MFG SERVICE KIT SK421-130B REPLACING ALUMINUM ELEVATOR HINGE BRACKETS WITH STAINLESS STEEL BRACKETS.May 10, 2006 · N1944G · Cessna 421B · Elevator Control SystemSDR 21200003ADHinge · damagedCUSTOMER REPORTED VIBRATION AT HIGH SPEEDS. INSPECTED AIRCRAFT AND FOUND CENTER ELEVATOR HINGE INBOARD AND OUTBOARD BRACKETS ELONGATED ON THE RIGHT ELEVATOR. INSTALLED CESSNA SERVICE KIT SK421-130B REPLACING ALUMINUM ELEVATOR HINGE BRACKETS WITH STAINLESS STEEMay 10, 2006 · N1944G · Cessna 421B · Elevator Control SystemSDR 2006F00002Unknown · unknownDURING TAKEOFF FROM 2W6 LT ENGINE SHUTDOWN, SECURED ENGINE, CIRCLED, RETURNED FOR LANDING. CAUSE YET TO BE DETERMINED. PRELIMINARY INDICATIONS ARE FAILED FUEL PUMP DRIVE/ACCESSORY DRIVE.Jan 12, 2006 · N37676 · Cessna 421B · Powerplant SystemSDR 2006FA0000002Circuit Breaker · corrodedAVIONICS MASTER CIRCUIT BREAKER SWITCH FOUND INTERMITTENT DURING COMPLIANCE WITH AD 2005-20-05, MEB05-1. PN 593-240-101 NOT FOUND IN MFG PARTS MANUAL BUT THIS WAS CLEARLY THE ORIGINAL FACTORY INSTALLED CB. PROBLEM NR1, INTERNAL COMPONENTS OF CB HAD SEVERE CJan 4, 2006 · N678DB · Cessna 421B · Electrical Power System WiringSDR CA051220007Bellcrank · brokenAIRCRAFT LAND GEAR EXTENSION CARRIED OUT AS NORMAL ON AIRPORT APPROACH. ON THE GROUND, THE PILOT NOTICED THAT THE RIGHT MAIN GEAR INBOARD DOOR WAS NOT CLOSED. UPON FURTHER INSPECTION BY AN AME, RT GEAR DOOR RETRACTION SYSTEM BELLCRANK P/N 0841106-6 WAS FOUNDDec 7, 2005 · Cessna 421B · Landing Gear Door Retract Section
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