Continental GTSIO-520 series

Service difficulty reports · 69

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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 engine_model_key = 'GTSIO520'
  ORDER BY difficulty_date DESC"

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SDR 2026FA0000316Intake Duct · looseON 3 MAY 2026, APPROXIMATELY 11:55 AM, N123NP DEPARTED BIL FOR FBL AND FOUND THAT THE RIGHT ENGINE WOULDN'T MAKE RED LINE MAP AND ABORTED HIS TAKEOFF. MAINTENANCE FOUND A COUPLE INDUCTION TUBE CLAMPS LOOSE. THE MECHANIC TIGHTENED BOTH CLAMPS AND AND THE PILOT May 3, 2026 · N123NP · Cessna 421C · Engine Air Intake SystemSDR 2018FA0000313Actuator · failedNOSE GEAR COLLAPSED DURING NORMAL LANDING, NOSE GEAR ACTUATOR FAILED - UNLOCKED.Jul 31, 2018 · N427JM · Cessna 421C · Landing Gear ActuatorSDR 2016FA0000226Alternator · failedRIGHT ALTERNATOR FAILED. PULLED OFF THE ALTERNATOR AND FOUND BROKEN ALTERNATOR SHAFT 1" OTBD OF DRIVE COUPLING. CAME OFF ENGINE FROM ACFT.May 10, 2016 · N421ZM · Cessna 421C · AC InverterSDR 2015FA0000556Intake Valve · failedPILOT REPORTED A VIBRATION IN THE LT ENGINE AND MADE A PRECAUTIONARY LANDING. UPON INVESTIGATION IT WAS FOUND THAT THE LT ENGINE HAD DROPPED AN INTAKE VALVE AND A HOLE HAD BEEN KNOCKED IN THE CASE BELOW THE MAGS.Nov 9, 2015 · N43BM · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 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 2014FA0000266Nut · missingRT ENGINE NR 5 CYLINDER WAS DETERMINED TO HAVE 4 CYLINDER HOLD DOWN NUTS MISSING. UNABLE TO DETERMINE THE CAUSE. ENGINE REMOVED AND SENT OUT FOR REPAIR.Apr 23, 2014 · N459DM · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 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 2012FA0000672Engine · power lossDURING A FINAL APPROACH, PILOT APPLIED THROTTLE TO ARREST HIS SINK RATE BUT THE ENGINE DID NOT RESPOND. POST ACCIDENT INVESTIGATION REVEALED AT LEAST 5 GALLONS WAS AVAILABLE IN EACH WING TANK.Oct 2, 2012 · N6181N · Cessna T210M · Engine (Turbine/Turboprop)SDR 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 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 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 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 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 2009FA0000842Cylinder · crackedECI REPAIRED CYLINDER FOUND TO BE CRACKEDJan 20, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder 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 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 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 2007FA0000872Skin · corrodedLT AND RT WING UPPER SKINS UNDER THE NACELLE FUEL BLADDER TANKS HAD CORROSION PRESENT TO THEM AND RELATED AREA AROUND THE BLADDER BAYS. WO NR 10688. (K)Jul 19, 2007 · N648SB · Cessna 421C · Wing, Plate/SkinSDR 2007FA0000536Line · corrodedDURING INSPECTION, HEARD A FAINT GAS LEAK IN OVERHEAD. PULLED O2 OUTLETS IN SUSPECTED AREA, AND CHECKED B-NUTS, ALL SECURE. PULLED HEADLINER FOR A CLOSER INSPECTION. FOUND O2 LINE JUST FWD OF THE CABIN DOOR CORRODED AND LEAKING. CORROSION ON THE LINE OCMay 30, 2007 · N377CA · Cessna 441 · Oxygen SystemSDR M1144Exhaust Valve · brokenPILOT REPORTED THAT RT ENGINE WAS RUNNING ROUGH IN FLIGHT. HE DID NOT SHUTDOWN ENGINE. FOUND NO COMPRESSION IN NR 5 CYLINDER ON RT ENGINE. REMOVED CYLINDER AND FOUND EXHAUST VALVE WAS BROKEN. INSTALLED OVERHAULED CYLINDER ASSEMBLY.Feb 8, 2007 · N540CA · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2006FA0000961Crankcase · leakingPOROSITY IN CRANKCASE NOSE SECTION ON THE RT SIDE BY THE OIL GALLEY PLUG. LEAKS OIL, MFG HAS BEEN NOTIFIED. (K)Sep 19, 2006 · Reciprocating Engine Power SectionSDR 2006FA0000962Crankcase · leakingPOROSITY IN CRANKCASE NOSE SECTION ON THE RT SIDE BY THE OIL GALLEY PLUG. LEAKS OIL. MFG HAS BEEN NOTIFIED. (K)Sep 19, 2006 · Reciprocating Engine Oil SystemSDR 2006FA0000908Switch · fouledLANDING GEAR WOULD NOT EXTEND ELECTRICALLY UPON APPROACH TO RFD. MANUAL EXTENSION OPERATIONS NORMAL. TROUBLESHOT LANDING GEAR ELECTRICAL SYS. FOUND S45 LANDING GEAR ACTUATOR DYNAMIC BRAKE DOWNLIMIT SWITCH OIL SOAKED AND FOULED BY LINT, FUZZ, ETC. CLEANED DAug 17, 2006 · N515EK · Beech B36TC · Landing Gear Retraction/Extension SystemSDR 2006FA0000821Hinge · corrodedTO FIND USED SERVICEABLE HINGES AND HINGE SUPPORT FITTINGS FROM AC SALVAGE COMPANIES, EVERY HINGE THAT WAS RECEIVED, SAME TYPE OF CORROSION, BEARING AND BUSHINGS WERE RUSTED TO HINGE BOLT. BUSHINGS AND BEARING ARE PRESS FIT INTO HINGE SO AS TO ALLOW HINGE ASJul 26, 2006 · N485DS · Cessna 421C · DoorsSDR 2007FA0000198Bolt · corrodedDURING ACCOMPLISHMENT OF ANNUAL INSPECTION, EXCESSIVE PLAY WAS NOTED AT AFT HINGE POINT OF UPPER MAIN CABIN DOOR. INVESTIGATION REVEALED THAT HINGE BOLT WAS BROKEN, HEAD OF BOLT COULD BE TURNED, BUT END WITH NUT WOULD NOT FOLLOW. TRIED TO REMOVE BOLT BUT WASJul 26, 2006 · N485DS · Cessna 421C · Passenger/Crew DoorsSDR 000Bolt · departedWHILE TAXING TO PARK THE RT MLG LINK ASSEMBLY BOLT CAME OUT CAUSING THE UPPER AND LOWER LINKS TO SEPERATE. THE RT LANDING GEAR TURNED 90 DEGREES BENDING THE GEAR DOOR COVER.Mar 31, 2006 · N849JB · Cessna 421A · Main Landing Gear Strut/Axle/TruckSDR 2006FA0000029Distributor Gear · strippedPILOT REPORTED LT ENGINE RUNNING ROUGH. TROUBLESHOT PROBLEM TO LT MAGNETO. FOUND TEETH ON DISTRIBUTOR GEAR IN LT MAGNETO STRIPPED AND NOT TURNING PROPERLY. (GL25200605792) (K)Dec 6, 2005 · N421CQ · Cessna 421C · Magneto/DistributorSDR OEJ2005F00000Landing Gear · failedAFTER LANDING, DURING ROLL OUT THE LT MLG FOLDED UP. BEFORE LANDING, ON FINAL APPROACH. THE GEAR WAS VERIFIED BY BOTH PILOTS THAT THE GEAR WAS DOWN AND LOCK WITH ALL GREEN LIGHTS AND ALL SYSTEMS NORMAL. AT THIS TIME NO VERIFICATION ON WHY THIS INCIDENT OCCUOct 25, 2005 · N968J · Cessna 421B · Main Landing GearSDR 2005FA0001556Rod End · failedROD END ON NOSE GEAR ACTUATOR FAILED DURING ROLLOUT CAUSING THE NOSE GEAR TO COLLAPSE. (K)Oct 10, 2005 · N923CP · Cessna 421C · Landing Gear ActuatorSDR 2005FA0001313Bellcrank · crackedPILOT SAID PRESSURE REQUIRED TO MOVE RUDDER PEDALS WAS NOT NORMAL ON PREFLIGHT INSPECTION. NOSE GEAR STEERING BELLCRANK WAS CRACKED THROUGH AND BROKEN APART ON THE LT SIDE OF THE CENTER MOUNTING RADIUS. THE RT SIDE OF THIS RADIUS ALSO IS CRACKED.Sep 19, 2005 · N2740B · Cessna 421C · Steering UnitSDR 2005FA0001314Bellcrank · crackedPILOT SAID PRESSURE REQUIRED TO MOVE RUDDER PEDALS WAS NOT NORMAL ON PREFLIGHT INSPECTION. NOSE GEAR STEERING BELLCRANK WAS CRACKED THROUGH AND BROKEN APART ON THE LT SIDE OF THE CENTER MOUNTING RADIUS. THE RT SIDE OF THIS RADIUS ALSO IS CRACKED.Sep 19, 2005 · N2740B · Cessna 421C · Steering UnitSDR 2005FA0001259Adapter · damagedMETAL IN ENGINE. STARTER ADAPTER, CRANK GEAR HAD TEETH MISSING. SB WAS NEVER C/W. (K)Sep 1, 2005 · N617CC · Cessna 421C · Engine StarterSDR TZR2005F00021Cylinder · crackedCRACK IS TYPICAL FOR THESE CYLINDERS, LT NR 3, (SW05200509362). (K)Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder SectionSDR 2005FA0001065Antenna · inoperativeFOUND UPPER UAT ANTENNA UNSERVICEABLE. (K)Apr 14, 2005 · N90193 · Cessna T207 · Central DisplaySDR 2005FA0000128Crankcase · crackedENGINE CASE CRACK BY NR 3 FORWARD CYLINDER UPPER THROUGH BOLT RADIATING DOWNWARD SEVERAL INCHES. AD ADDRESSES THIS PROBLEM, BUT THESE MODEL NR ENGINE ARE NOT INCLUDED. THIS HAS HAPPENED TO THIS ENGINE ONCE BEFORE, 2 YEARS AGO. (K)Dec 22, 2004 · N885C · Cessna 421C · Reciprocating Engine Power SectionSDR 2005FA0000755Rocker · brokenENGINE BECAME ROUGH IN FLIGHT ENGINE SHUTDOWN FOUND RT ENGINE NR 1 CYLINDER EXHAUST ROCKER ARM BROKEN. (K)Dec 20, 2004 · Cessna 421B · Reciprocating Engine Cylinder SectionSDR 2005FA0000092Intake Valve · brokenINTAKE VALVE IN NR 4 CYLINDER FAILED IN FLIGHT. THE VALVE FACE BROKE IN 3 PIECES. THE QUILL SHAFT BROKE AND SHUTDOWN THE ENGINE. THIS IS 3RD ONE SEEN WITH 400-500 HOURS IN SERVICE. (K)Nov 17, 2004 · N111KJ · Cessna 421C · Reciprocating Engine Cylinder SectionSDR 2005FA0000704Main Bearing · delaminatedNR 3 MAIN BEARING APPEARED TO DELAMINATE. ALL THE BRASS OR BRONZE SEPARATED FORM THE BEARING SHELL. THE CRANKSHAFT, NR 3 JOURNAL DOES NOT SHOW SIGNS OF OIL STARVATION. (K)Nov 12, 2004 · N10FF · Cessna 421C · Reciprocating Engine Power SectionSDR 2005FA0000677Main Bearing · delaminatedBEARING CRACKED AND DELAMINATED IN NR2 MAIN BEARING SADDLE. HEATED CRACKS IN NR2 MAIN JOURNAL. THIS HAS BEEN NOTED ON OTHER ENGINES WE HAVE DISASSEMBLED. BEARING BORN DATE 10-02. THIS WAS A NEW CASE AND NO SIGNS OF FRETTING ON THE CASE HALF. (K)Nov 10, 2004 · N9SD · Cessna 421B · Reciprocating Engine Power SectionSDR 2004FA0000419Cylinder · crackedRAM AIRCRAFT HAS FOUND NUMEROUS CYLINDERS WITH LOW HOURS CRACKED IN AN AREA EXTENDING FROM FUEL INJECTOR BOSS AREA TO THE SPARK PLUG HOLE. IN THIS AREA IS A MACHINED AREA WITHOUT SUFFICIENT RADIUS. SUGGEST RADIUS OF THIS AREA TO PREVENT CRACKING.Apr 6, 2004 · Reciprocating Engine Cylinder SectionSDR 2004FA0000297Detector · inoperativeTHIS NEWLY OVERHAULED DETECTOR WAS INSTALLED AND OPS CHECKED AFTER A COUPLE OF CHECKS THE STALL HORN WILL STAY ON. RETURNED UNIT FOR ANOTHER O/HED DETECTOR. THIS ABOUT SECOND AIRCRAFT I WENT THROUGH THIS WITH (ORDERING DETECTORS UNTIL I GET ONE THAT WORKED. Feb 6, 2004 · N421ZM · Cessna 421C · Stall Warning SystemSDR 2004FA0000069Exhaust Riser · damagedWHILE IN IFR FLIGHT, PILOT REPORTED LOSS OF MANIFOLD PRESSURE AND EXHAUST GAS TEMPERATURE INSTRUMENTATION READINGS. HOWEVER MP STABILIZED AT LOWER THAN NORMAL READINGS. MADE PRECAUTIONARY LANDING AT CLOSEST AIRPORT, WHICH MET IFR MINIMUMS. TECH PRESSURE CHEDec 23, 2003 · N485DS · Cessna 421C · Engine Collector/Tailpipe/NozzleSDR 421C111003DGCylinder · wornON ENGINE START-UP, REAR PASSENGERS NOTED GREATER THAN USUAL SMOKE EMITTED FROM EXHAUST ON NR 1 ENGINE. THE PILOT SHUT DOWN AND PERFORMED A VISUAL INSPECTION OF THE ENGINE NACELLE FOR OIL AND/OR OTHER ABNORMAL CONDITIONS: NONE NOTED. THE PILOT PERFORMED ANONov 12, 2003 · N27RX · Cessna 421C · Reciprocating Engine Cylinder SectionSDR HLF2003F00001Crankcase · crackedCRACKED CRANKCASE AT NR 7 STUD, BETWEEN CYLINDERS NR 1 AND NR 3. CRACK IS ON CRITICAL AREA AND EXCEEDS THE MAX ALLOWED IAW SBM 90-17. PROBABLE CAUSE: OVERTORQUED NUT OR DEFECTIVE CRANKCASE. REPORTED TO MFG.Oct 6, 2003 · N148MA · Cessna 421C · Reciprocating Engine Power SectionSDR CMI2003F00000B-Nut · undertorquedNR 2 ENGINE STARTED RUNNING ROUGH. PILOT LANDED AND HAD PROBLEM CHECKED. NR 5 CLYINDER FUEL INJECTOR LWE B-NUT WAS LOOSE ON INJECTOR DUE TO IMPROPER TORQUE DURNING MAINTENANCE.Mar 20, 2003 · N8430N · Cessna 421C · Fuel Injector NozzleSDR 2003FA0000305Pump · shearedENGINE QUIT DURING TAKEOFF. THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED. INVESTIGATION REVEALED A SHEARED DRIVE SHAFT FOR THE ENGINE DRIVEN FUEL PUMP (INJECTOR PUMP). DISASSEMBLY REVEALED FOD (A SMALL PIECE OF WIRE) JAMMED IN THE ROTOR/VANE. FURTHER INVESTIGATIOMar 19, 2003 · N9486S · Beech V35 · Fuel Boost PumpSDR IBUA121EReservoir · leakingDURING INSPECTION OF AIRCRAFT, FOUND SIGHT TUBE ON HYDRAULIC RESERVOIR TO BE LEAKING, REPLACED WITH NEW. AFTER A FEW DAYS THE AIRCRAFT WAS STILL IN INSPECTION AND SAW THAT IT WAS CRACKED AGAIN SO WE INSTALLED AND OTHER SIGHT TUBE. ON THE LAST DAY OF INSPECTIMar 19, 2003 · N84GE · Cessna 421C · Hydraulic Reservoir, MainSDR 2002FA0001301Hub · crackedDURING NOSE TIRE CHANGE, DEGREASING OF WHEEL AND HUB, THREE CRACKS WERE FOUND ON CENTER HUB WHERE END PLATES BOLT TO HUB. WHEEL ASSEMBLY WAS PREVIOUSLY PAINTED MAKING VISUAL INSPECTION IMPOSSIBLE. AT TIME OF CHANGE, PAINT FLAKING ALLOWED CRACKS TO SHOW UP. Nov 6, 2002 · N5491G · Cessna 421C · Wheel/Ski/Float
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