# Service difficulty reports: Continental GTSIO-520-H

A list on [Continental GTSIO-520-H](https://openairdocs.org/engine/continental-gtsio-520-h.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 3 · 102 reports

- [SDR 2022FA0000351](https://openairdocs.org/sdr/2022FA0000351.md): Magneto · defective · Jul 14, 2022 · N678DB · Cessna 421B · Magneto/Distributor
  > LOSS 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
- [SDR 2022FA0000319](https://openairdocs.org/sdr/2022FA0000319.md): None · failed · Jun 24, 2022 · N678D · Cessna 421B · Ignition Harness (Distribution)
  > CRUISE 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
- [SDR CA180925012](https://openairdocs.org/sdr/CA180925012.md): Support · loose · Sep 22, 2018 · Cessna 421B · Reciprocating Engine Rear Section
  > (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 RETA
- [SDR 2017FA0000635](https://openairdocs.org/sdr/2017FA0000635.md): Magneto · faulty · Nov 15, 2017 · N4AD · Cessna 421B · Magneto/Distributor
  > HAD 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 ENG
- [SDR YN8R201606300001](https://openairdocs.org/sdr/YN8R201606300001.md): Piston · cracked · Jun 30, 2016 · N50DL · Cessna 421B · Reciprocating Engine Cylinder Section
  > WHEN 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 BOR
- [SDR CA120417008](https://openairdocs.org/sdr/CA120417008.md): Actuator · malfunctioned · Apr 17, 2012 · Cessna 421B · Rudder Tab Control System
  > (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 TH
- [SDR 2011FA0000805](https://openairdocs.org/sdr/2011FA0000805.md): Cylinder · fractured · Nov 15, 2011 · N732GS · Cessna T210L · Reciprocating Engine Cylinder Section
  > 6 NEW CYLINDERS WERE INSTALLED AUG 10, 2008 AT 2812 TOTAL TIME. THE CYLINDERS EXPERIENCED A FAILURE OF THE VALVE GUIDES ON 3 OF THE 6 AT 384 HOURS TIME IN SERVICE. ALL 3 FAILED VALVE GUIDES BROKE OFF AT THE INSERT POINT AND 1 COMPLETELY DISINTEGRATED, CONTAMIN
- [SDR YWYR201209158826](https://openairdocs.org/sdr/YWYR201209158826.md): Spark Plug · cracked · Nov 8, 2011 · N1946G · Cessna 421B · Spark Plug/Igniter
  > PILOT 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
- [SDR 2011FA0000582](https://openairdocs.org/sdr/2011FA0000582.md): Gear · sheared · Aug 12, 2011 · N71544 · Cessna 421B · DC Generator-Alternator
  > PILOT 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. AL
- [SDR Z8G2011F00000](https://openairdocs.org/sdr/Z8G2011F00000.md): Thrust Bearing · mismanufactured · Jul 28, 2011 · N960EM · Cessna 421B · Exhaust Turbocharger
  > PILOT 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 40726
- [SDR KY7A882H17150](https://openairdocs.org/sdr/KY7A882H17150.md): Alternator · failed · Mar 2, 2011 · N404MG · Cessna 404CESSNA · AC Inverter
  > ACFT WAS INBOUND AT CRUISE. E2 ALTERNATOR WAS FLICKERING ON OFF LINE MULTIPLE TIMES AND FAILED. E1 ALTERNATOR FAILED AFTER E2. PILOT LOST ELECTRICAL POWER AND LANDED.
- [SDR CA110203004](https://openairdocs.org/sdr/CA110203004.md): Burner Can · cracked · Jan 28, 2011 · Cessna 421B · Heating System
  > (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 AIRCRA
- [SDR 2010FA0001149](https://openairdocs.org/sdr/2010FA0001149.md): Boss · cracked · Nov 1, 2010 · N1958G · Cessna 421B · Reciprocating Engine Power Section
  > DURING VISUAL INSP OF THE ENGINE DISCOVERED INTERCOOLER AFT MOUNTING BOSS TO BE CRACKED 3/4 OF THE WAY AROUND.
- [SDR 2010FA0001147](https://openairdocs.org/sdr/2010FA0001147.md): Shaft · cracked · Sep 16, 2010 · N421DP · Cessna 421B · Propeller Assembly
  > PILOT 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 DEVEL
- [SDR 2009FA0000886](https://openairdocs.org/sdr/2009FA0000886.md): Gear · worn · Oct 22, 2009 · N411Z · Engine Starter
  > DURING INSPECTION OF THE STARTER DRIVE UNIT PER AD 2007-05-15. FOUND STARTER ADAPTER DRIVE GEAR WORN BEYOND ACCECPTABLE LIMITS. REPLACED WITH KIT R-EQ6642.
- [SDR 2009FA0000887](https://openairdocs.org/sdr/2009FA0000887.md): Gear · worn · Oct 22, 2009 · N411Z · Reciprocating Engine Power Section
  > DURING INSPECTION OF RIGHT ENGINE STARTER DRIVE UNIT PER AD 2007-05-15 FOUND THE CRANKSHAFT GEAR WORN BEYOND ACCEPTABLE LIMITS. REPLACED WITH KIT R-EQ6642 CONTAING NEW GEAR AND OVERHAULED STARTER DRIVE UNIT.
- [SDR 2009FA0000888](https://openairdocs.org/sdr/2009FA0000888.md): Gear · worn · Oct 22, 2009 · N411Z · Reciprocating Engine Power Section
  > DURING INSPECTION OF RIGHT ENGINE STARTER DRIVE UNIT PER AD 2007-05-15 FOUND THE CRANKSHAFT GEAR WORN BEYOND ACCEPTABLE LIMITS. REPLACED WITH CONTINENTAL KIT R-EQ6642 CONTAING NEW GEAR AND OVERHAULED STARTER DRIVE UNIT.
- [SDR 2009FA0000889](https://openairdocs.org/sdr/2009FA0000889.md): Clutch Spring · broken · Oct 22, 2009 · N411Z · Engine Starter
  > PILOT REPORTED UNABLE TO START LEFT ENGINE. INSPECTED STARTER DRIVE UNIT AND FOUND CLUTCH SPRING BROKEN. REPLACED WITH CONTINENTAL KIT R-EQ6642 CONTAING AN OVERHAULED STARTER DRIVE UNIT AND CRANKSHAFT GEAR. FAILURE COULD BE CAUSED BY ENGINE KICK BACK AT START.
- [SDR XTTA09030918](https://openairdocs.org/sdr/XTTA09030918.md): Autopilot Sys · shorted · Sep 3, 2009 · N21WT · Cessna 421B · Altitude Controller
  > ON 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.
- [SDR CA090819006](https://openairdocs.org/sdr/CA090819006.md): Fitting · cracked · Aug 12, 2009 · Cessna 421B · Engine Fuel Distribution
  > ON 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 A
- [SDR 2009FA0000438](https://openairdocs.org/sdr/2009FA0000438.md): Bolt · sheared · Mar 30, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > DURING 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
- [SDR CA081212002](https://openairdocs.org/sdr/CA081212002.md): Bearing · failed · Dec 5, 2008 · Cessna 421B · AC Generator-Alternator
  > (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.
- [SDR O5W2007F00000](https://openairdocs.org/sdr/O5W2007F00000.md): Lock Plate · destroyed · Nov 20, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front Section
  > THIS 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 A
- [SDR CA070514024](https://openairdocs.org/sdr/CA070514024.md): Exhaust Valve · failed · May 14, 2007 · Cessna 421B · Reciprocating Engine Cylinder Section
  > (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 HEA
- [SDR 2007FA0000366](https://openairdocs.org/sdr/2007FA0000366.md): Gasket · broken · Apr 12, 2007 · N42776 · Cessna 421B · Engine Oil Cooler
  > AIRCRAFT 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 AN
- [SDR CA070228008](https://openairdocs.org/sdr/CA070228008.md): Window · cracked · Feb 8, 2007 · Cessna 421B · Door Windows
  > (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)
- [SDR 2006F00031](https://openairdocs.org/sdr/2006F00031.md): Engine · seized · Jul 18, 2006 · N37676 · Cessna 421B · Engine (Reciprocating)
  > PILOT 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.
- [SDR CA061030003](https://openairdocs.org/sdr/CA061030003.md): Gear · broken · Jun 27, 2006 · Cessna 421 · Engine Starter
  > (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
- [SDR 2006F00002](https://openairdocs.org/sdr/2006F00002.md): Unknown · unknown · Jan 12, 2006 · N37676 · Cessna 421B · Powerplant System
  > DURING 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.
- [SDR CA051220007](https://openairdocs.org/sdr/CA051220007.md): Bellcrank · broken · Dec 7, 2005 · Cessna 421B · Landing Gear Door Retract Section
  > AIRCRAFT 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 FOUND
- [SDR 2005FA0001593](https://openairdocs.org/sdr/2005FA0001593.md): Pump · inoperative · Dec 6, 2005 · N421KS · Cessna 421B · Heating System
  > THE PILOT REPORTED THE HEATER HAD STOPPED DURING FLIGHT. AFTER RETURNING TO THE MAINTENANCE SHOP THE HEATER WAS TROUBLESHOT AND INSPECTED. FOUND THE HEATER FUEL PUMP HAD MALFUNCTIONED AND HAD CAUGHT ON FIRE FOR A TIME. WERE ABLE TO SAY IT WAS ON FIRE BECAUS
- [SDR CA051026007](https://openairdocs.org/sdr/CA051026007.md): Contact · melted · Oct 20, 2005 · Cessna 421B · Engine Starter
  > ENGINE STARTER RELAY ARCING, CAUSED THE CONTACTS TO WELD TOGETHER SOLID. WHICH IN TURN CAUSED STARTER TO RUN CONTINOUSLY UNTIL IT OVERHEATED AND BURNED. POTENTIAL FOR ELECTRICAL FIRE IN ENGINE/WING ROOT.
- [SDR 2005FA0000750](https://openairdocs.org/sdr/2005FA0000750.md): Starter · inoperative · May 1, 2005 · N421GW · Cessna 421B · Engine Starter
  > STARTER INOPERATIVE. (K)
- [SDR CA050216005](https://openairdocs.org/sdr/CA050216005.md): Piston Pin · broken · Jan 31, 2005 · Cessna 421B · Reciprocating Engine Power Section
  > (CAN) PISTON (NR1) BROKE AT PIN BOSS RESULTING IN LARGE CHUNKS OF ALUMINUM FALLING INTO THE ENGINE, ENDING UP AT THE BOTTOM OF THE SUMP. SMALLER PIECES OF THE METAL WERE SUCKED UP THROUGH THE OIL PICK-UP AND RAN THROUGH THE OIL PUMP.
- [SDR CA050125013](https://openairdocs.org/sdr/CA050125013.md): Bearing Cage · disintegrated · Jan 20, 2005 · Cessna 421B · Engine Starter
  > (CAN) ATTEMPT TO START RT ENGINE AT EXTREME COLD TEMP. ENGINE BACKFIRED, STARTER ADAPTER SHAFT BRG CAGE DISINTEGRATED, SHAFT OIL SEAL BLEW.
- [SDR CA040203008](https://openairdocs.org/sdr/CA040203008.md): Bolt · wrong part · Jan 22, 2004 · Cessna 421B · Passenger/Crew Doors
  > (CAN) BOLTS, BUSHINGS SEIZED ON MAIN DOOR TOP HALF. INCORRECT HARDWARE STACK-UP, IE INTERNAL WRENCHING BOLT HAD PLAIN WASHER UNDER RADIUS OF HEAD. SEVERAL AIRCRAFT HAVE HAD THESE SAME PROBLEM OF SEIZED/CORRODED PARTS. CAUSED BY LACK OF LUBRICATION. MAIN DOOR
- [SDR AK62004F00002](https://openairdocs.org/sdr/AK62004F00002.md): Spar Cap · corroded · Oct 14, 2003 · N777TS · Cessna 421B · Wing Spar
  > DURING AN ATTEMPT TO REPAIR CORROSION AROUND THE LT WING FLAP BELLCRANK, LOCATED IN THE EXHAUST GAS TRAIL ON LOWER SIDE OF WING. DISCOVERED SEVERE INTERGRANULAR CORROSION ON LOWER SPAR CAP (JUST OB OF FACTORY SPLICE PLATE).
- [SDR 2003FA0000976](https://openairdocs.org/sdr/2003FA0000976.md): Spark Plug · cracked · Sep 15, 2003 · N421GC · Cessna 421B · Spark Plug/Igniter
  > DURING ROUTINE 100 HR INSPECTION 4 SPARK PLUGS ON RIGHT ENGINE FOUND TO HAVE CRACKS IN THE PLUG BODY BETWEEN THE GASKET SURFACE AND THE WRENCH HEX.
- [SDR AUS20030690](https://openairdocs.org/sdr/AUS20030690.md): Connecting Rod · damaged · Jul 8, 2003 · Cessna 421B · Reciprocating Engine Power Section
  > (AUS) NR 2 CYLINDER CONNECTING ROD PN 655004 BIGEND CAP CONTACTING CAMSHAFT PN 653056 NR 2 CYLINDER EXHAUST LOBE. INSPECTION FOUND A SIMILAR PROBLEM WITH NR 6 CYLINDER CONNECTING ROD BIG END CAP.
- [SDR AUS20030666](https://openairdocs.org/sdr/AUS20030666.md): Cylinder · wrong part · Jul 2, 2003 · Cessna 421B · Reciprocating Engine Cylinder Section
  > (AUS) RT ENGINE HAD TWO UNAPPROVED CYLINDERS FITTED. PN 653452 CYLINDERS ARE NOT APPROVED FOR THE GTSIO520-H MODEL CYLINDERS UNLESS MODIFIED. THE TWO CYLINDERS FITTED WERE NOT MODIFIED IAW APPROVED SCHEME. THE REMAINING PN 653453A4 CYLINDERS FITTED ARE APPROV
- [SDR AUS20030659](https://openairdocs.org/sdr/AUS20030659.md): Rod Bearing · worn · Jun 30, 2003 · Cessna 421B · Reciprocating Engine Power Section
  > (AUS) CONNECTING ROD LITTLE END BEARING MOVED AND WORE ON PISTON. INVESTIGATION FOUND TWO MORE LITTLE END BEARINGS LOOSE.
- [SDR AUS20030660](https://openairdocs.org/sdr/AUS20030660.md): Injector · misinstalled · Jun 30, 2003 · Cessna 421B · Fuel Injector Nozzle
  > (AUS) FUEL INJECTOR NOZZLE INCORRECTLY FITTED. TWO RUBBER SEALS AND ONE METAL WASHER FITTED INSTEAD OF THE CORRECT FIT OF ONE RUBBER SEAL AND ONE METAL WASHER. PERSONNEL/MAINTENANCE ERROR.
- [SDR AUS20030380](https://openairdocs.org/sdr/AUS20030380.md): Line · loose · Jan 31, 2003 · Cessna 421B · Engine Fuel Distribution
  > (AUS) LT ENGINE NR 5 CYLINDER FUEL INJECTION LINE LOOSE AT ATTACHMENT TO FLOW DIVIDED.
- [SDR CA030129001](https://openairdocs.org/sdr/CA030129001.md): Line · blocked · Jan 22, 2003 · Cessna 421B · Manifold Pressure (MP) Indicating
  > (CAN) ON GROUND WARM UP AND RUN ALL WAS NORMAL, ON TAKEOFF RT MANIFOLD STAYED AT 28.5 INCHES, ALL OTHER INDICATIONS AND ENGINE FUNCTIONS NORMAL. TAKEOFF ABORTED AND AIRCRAFT RETURNED TO HANGAR. MANIFOLD LINE FOUND BLOCK IN WING SECTION BETWEEN WING AND A/F. MO
- [SDR AK62002F00001](https://openairdocs.org/sdr/AK62002F00001.md): Bearing · failed · Aug 23, 2002 · N5448J · Cessna 421B · Reciprocating Engine Power Section
  > THE RT ENGINE APPEARS TO HAVE SUFFERED FROM OIL STARVATION AT THE NR 5 ROD JOURNAL. THIS CAUSED THE ROD TO SEPARATE AND PROTRUDE THRU THE TOP OF THE CRANKCASE.
- [SDR BLIA512C8502](https://openairdocs.org/sdr/BLIA512C8502.md): Shaft · failed · Aug 5, 2002 · N65AE · Cessna 421B · Engine (Reciprocating)
  > DURING CLIMB TO MK LEVELED AT 18K. ENGINE OPS BECAME ROUGH, THEN TACH WENT TO ZERO. PILOT OBSERVED SMOKEY MIST FROM LOUVERS. ENGINE TURNED OFF AND FEATHERED. DECLARED EMERGENCY AND LANDED. INSPECTED AND FOUND IDLER SHAFT LOOSE IN NACELLE. AIRCRAFT IN ST
- [SDR AUS20020125](https://openairdocs.org/sdr/AUS20020125.md): Exhaust Pipe · leaking · Jan 26, 2002 · Cessna 421B · Engine Collector/Tailpipe/Nozzle
  > (AUS) RH ENGINE FIRE. ENGINE COMPARTMENT DAMAGED. FIRE WAS EXTINGUISHED USING CABIN FIRE EXTINGUISHER. INVESTIGATION FOUND THE FIRE WAS CAUSED BY MISALIGNMENT OF THE EXHAUST SWIVEL JOINT WHICH ALLOWEDEXHAUST GAS TO LEAK INTO THE ENGINE BAY. A LIST OF DAMAGE IS
- [SDR DMV2002F00000](https://openairdocs.org/sdr/DMV2002F00000.md): Bearing · failed · Jan 21, 2002 · N81HR · Cessna 421B · Engine Cranking
  > STARTER ADAPTER HOUSING MAIN BEARING FAILURE, RESULTS IN EXCESSIVE PLAY TO REAR ENGINE GEAR ASSEMBLY ADVISE UPGRADING TO BETTER STYLE OF BEARING DESIGNED FOR BETTER LOADS. PROVIDE A 500 HOUR INSPECTION THAT MIGHT REQUIRE REMOVAL AND INSPECTION OF BEARING TO
- [SDR 2002FA0000018](https://openairdocs.org/sdr/2002FA0000018.md): Bolt · loose · Dec 12, 2001 · N421PK · Cessna 421B · AC Generator-Alternator
  > ALTERNATOR THRU BOLT CAME OUT AND ARCED ON STATOR TERMINAL. INSPECTED ALTERNATOR AND REINSTALLED ALTERNATOR BOLT. CHECKED TORQUE ON REMAINING BOLTS. SUGGEST BENDING LOCK TABS OVER PROPERLY AFTER TORQUING BOLTS.
- [SDR LQU2002F00000](https://openairdocs.org/sdr/LQU2002F00000.md): Pin · missing · Dec 1, 2001 · N799 · Cessna 421B · Reciprocating Engine Rear Section
  > RIGHT ENGINE RAN ROUGH AND VIBRATED BADLY IN FLIGHT, SHUT DOWN. VISUAL INSPECTION FOUND OPEN HOLE IN BACK OF CRANKCASE. IDLER GEAR SUPPORT PIN MISSING. FOUND PIN ON ENGINE NACELLE FLOOR UNDER ENGINE. NO VISUAL DAMAGE NOTED TO PIN. ENGINE NEEDS PIN TO HOLD

Next page: https://openairdocs.org/engine/continental-gtsio-520-h/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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 = 'GTSIO520H'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/continental-gtsio-520-h/reports

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