# Service difficulty reports: Continental GTSIO-520-M

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

Newest first. General aviation reporting is voluntary.

Page 1 of 4 · 157 reports

- [SDR HTKA202001080000](https://openairdocs.org/sdr/HTKA202001080000.md): Engine · failed · Nov 14, 2019 · N502RA · Cessna 404 · Engine (Reciprocating)
  > ENGINE FAILED IN FLIGHT. NUMBER 1 CONNECTING ROD AND (CRANK END) PROTRUDING THROUGH TOP OF ENGINE CASE. RIGHT MAGNETO BROKEN OFF ITS MOUNT. THE ENGINE HAS BEEN IN SERVICE SINCE 05/2017. IT IS A FACTORY REBUILT ENGINE. THIS IS THE SECOND ENGINE IN OUR FLEE
- [SDR DUFA20190619001](https://openairdocs.org/sdr/DUFA20190619001.md): Case · cracked · Jun 15, 2019 · N103RC · Cessna 404 · Engine (Reciprocating)
  > WHILE ON A ONE MILE FINAL APPROACH, THE RIGHT HAND ENGINE DEVELOPED A SEVERE VIBRATION AND BEGAN TO LOSE POWER. THE AUXILIARY FUEL PUMP WAS SELECTED TO HIGH BUT THE LOSS OF POWER DID NOT IMPROVE. THE ENGINE WAS SHUTDOWN AND THE PROPELLER FEATHERED. THE APPROAC
- [SDR 2017FA0000152](https://openairdocs.org/sdr/2017FA0000152.md): Cylinder · damaged · Apr 3, 2017 · N421HP · Cessna 421C · Reciprocating Engine Cylinder Section
  > AT INSPECTION ALL CYLINDERSS, HAD LOW DIFFERENTIAL PRESSURE CHECK, FOUND GLAZING ON CYLINDERSS AND ALL EXHAUST VALVE GUIDES WERE WORN OUT. REPLACED.
- [SDR DUFA20140506002](https://openairdocs.org/sdr/DUFA20140506002.md): Hose · deteriorated · May 6, 2014 · N103RC · Cessna 404 · Engine Oil Distribution (Airframe Furnished)
  > WHILE IN CRUISE FLIGHT, THE PILOT NOTICED THE LT ENG OIL PRESS DROPPING. ONCE THE OIL PRESS DROPPED BELOW THE GREEN ARC, SHUT DOWN THE LT ENG & CONTACTED CTR. DIVERTED TO ALTERNATE AIRPORT, MADE AN UNEVENTFUL LANDING. THE OIL WAS BEING DUMPED OVERBOARD THRO
- [SDR BGJA201404230001](https://openairdocs.org/sdr/BGJA201404230001.md): Clutch · failed · Apr 3, 2014 · N550M · Cessna 404 · Alternator-Generator Drive
  > DURING FLIGHT, THE LT ENGINE ALTERNATOR STOPPED PRODUCING POWER DUE TO THE DRIVE CLUTCH SLIPPING. AFTER LANDING, REMOVED ALTERNATOR AND CHECKED THE DRIVE CLUTCH. COULD TURN THE CLUTCH BY HAND WITH SOME FORCE. REPLACED THE CLUTCH, REGULATOR AND ALTERNATOR.
- [SDR KY7A20131204001](https://openairdocs.org/sdr/KY7A20131204001.md): Gasket · failed · Dec 4, 2013 · N404MG · Cessna 404 · Reciprocating Engine Oil System
  > PRIOR TO DEPARTURE FROM DEN, THE PILOT REPORTED THAT THE LT PNEUMATIC PUMP WAS INOPERATIVE. MX REPLACED THE PNEUMATIC PUMP & THE ACFT DEPARTED, CRUISING AT FL200. THE PILOT NOTED A DECREASE IN POWER & DECREASING OIL PRESS. THE PILOT SHUT DOWN & SECURED THE
- [SDR KY7A20120727002](https://openairdocs.org/sdr/KY7A20120727002.md): Oil System · low pressure · Jul 26, 2012 · N404MG · Cessna 404 · Reciprocating Engine Oil System
  > PILOT REPORTED THAT WHEN CONFIGURING THE ACFT FOR CRUISE FLIGHT THE LT ENGINE MANIFOLD PRESSURE DECREASED. PILOT NOTED THAT THE OIL PRESSURE WAS DECLINING AND SHUTDOWN THE ENGINE AS A PRECAUTIONARY MEASURE. OPEN
- [SDR GNB2009F00000](https://openairdocs.org/sdr/GNB2009F00000.md): Sleeve · cracked · May 26, 2009 · N5388J · Cessna 404 · Reciprocating Engine Cylinder Section
  > AFTER TAKEOFF, PILOT FELT ENGINE RUNNING ROUGH. ACFT RETURNED TO FIELD. MX DISCOVERED NR 2 CYLINDER UPPER DECK NOZZLE TUBE CRACKED. POSSIBLE WEAK WELD OF OUTSIDE TUBE. RECOMMENDED CLOSER ATTENTION TO LEANING ON LINES WHEN WASHING ON ENGINE AND INSPECTING A
- [SDR M7JA2009030200001](https://openairdocs.org/sdr/M7JA2009030200001.md): Engine · malfunctioned · Sep 13, 2008 · N404EN · Cessna 404 · Engine (Turbine/Turboprop)
  > IN CRUISE FLIGHT THE CAPTAIN NOTICE A DROP IN THE RT ENGINE OIL PRESSURE WITH INCREASE IN OIL TEMP. THERE WAS NOT VIBRATION OR VISIBLE OIL LEAKS ON THE MENTION ENGINE. THE PILOT FOLLOWED THE PROPER CHECKLIST EXECUTING A PRECAUTIONARY ENGINE SHUTDOWN. THE FL
- [SDR DUFA041007001](https://openairdocs.org/sdr/DUFA041007001.md): Stud · sheared · Apr 10, 2007 · N80BS · Cessna 404 · Reciprocating Engine Cylinder Section
  > WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM THE SAME ENGINE. HE ELECTED TO SHUT THE ENGINE DOWN AND MADE AN UNEVENTFUL LANDING. UPON INSPECTION, T
- [SDR DUFA20070002](https://openairdocs.org/sdr/DUFA20070002.md): Stud · sheared · Apr 10, 2007 · N80BS · Cessna 404 · Reciprocating Engine Cylinder Section
  > WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RIGHT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM THE SAME ENGINE. HE ELECTED TO SHUT THE ENGINE DOWN AND MADE AN UNEVENTFUL LANDING. UPON INSPECTION
- [SDR 2007FA0000226](https://openairdocs.org/sdr/2007FA0000226.md): Engine · failed · Feb 20, 2007 · N442EH · Cessna 404 · Engine (Reciprocating)
  > THIS ENGINE FAILED TO THE TERMINOLOGY OF CATASTROPHIC AT THE NR 1 AND NR 2 CYLINDER CONNECTING ROD LOCATIONS DURING A MAINTENANCE TEST FLIGHT WITHIN TEN MINUTES INTO THAT FLIGHT WITH A MECHANIC ON BOARD MONITORING THE ENGINE INSTRUMENTS. THE OIL PRESSURE SUDD
- [SDR BAC005](https://openairdocs.org/sdr/BAC005.md): Tube · disconnected · Aug 2, 2006 · N80BS · Cessna 404 · Fuel Pressure Indicator
  > PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS SELECTED TO HIGH AND MIXTURE INCREASED TO FULL RICH WHICH HAD LITTLE EFFECT. THE PILOT CONTACTED DISPAT
- [SDR BAC001](https://openairdocs.org/sdr/BAC001.md): Line · disconnected · Aug 2, 2006 · N80BS · Cessna 404 · Engine Fuel Distribution
  > PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LEFT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS SELECTED TO HIGH AND THE MIXTURE INCREASED TO FULL RICH WHICH HAD LITTLE EFFECT. THE PILOT CONTACTE
- [SDR BGJ2006F00000](https://openairdocs.org/sdr/BGJ2006F00000.md): Cylinder · cracked · Jan 6, 2006 · N155TT · Cessna 404 · Reciprocating Engine Cylinder Section
  > THE AIRCRAFT WAS IN CRUISE POWER CONFIGURATION. NR 5 CYLINDER BARREL ON RT ENGINE CRACKED AND SEPARATED APPROXIMATELY 3 INCHES FROM MOUNTING BASE IN THE BARREL AREA. DAMAGE WAS DONE TO THE PISTON AND CONNECTING ROD AT THE TIME OF SEPARATION. CAUSE IS UNKNOW
- [SDR AU510001447](https://openairdocs.org/sdr/AU510001447.md): Bolt · broken · Dec 12, 2005 · Cessna 404 · Reciprocating Engine Power Section
  > (AUS) ENGINE INTERNAL DAMAGE. SUSPECT CAUSED BY FAILURE OF NR 5 CONNECTING ROD BOLT OR CONNECTING ROD. INVESTIGATION CONTINUING.
- [SDR AU510001489](https://openairdocs.org/sdr/AU510001489.md): Bearing · failed · Dec 12, 2005 · Cessna 404 · Reciprocating Engine Power Section
  > (AUS) ENGINE METAL CONTAMINATION. WORKSHOP STRIP AND INVESTIGATION FOUND NR 2 AND NR 3 MAIN BEARINGS FAILED. BEARING SHELLS BROKE UP CAUSING DAMAGE TO CRANKCASE AND SEVERE DAMAGE TO CRANKSHAFT WITH CRACKING ON JOURNALS. (CASA NR 510001489)
- [SDR AU510001530](https://openairdocs.org/sdr/AU510001530.md): Uplock Switch · failed · Dec 12, 2005 · Cessna 404 · Landing Gear Position and Warning
  > LT MAIN LANDING GEAR UPLOCK MICROSWITCH FAULTY.
- [SDR AU510001619](https://openairdocs.org/sdr/AU510001619.md): Heater · faulty · Dec 12, 2005 · Cessna 404 · Heating System
  > (AUS) CABIN HEATER FAULTY. SMOKE IN CABIN. INVESTIGATION FOUND THE FORWARD VENT BLOWER INOPERATIVE DUE MOTOR BRUSH HANGUP. INSPECTION OF THE HEATER FOUND DISCOLORATION ON THE HEATER OUTER SHROUD. INTERNAL INSPECTION FOUND THE PAINT ON THE INSIDE OF THE HEATER
- [SDR AU510001695](https://openairdocs.org/sdr/AU510001695.md): Bearing · damaged · Dec 12, 2005 · Cessna 404 · Reciprocating Engine Power Section
  > ENGINE METAL CONTAMINATION. BULK STRIP FOUND THAT THE TWO REARMOST MAIN BEARINGS WERE DAMAGED. INSPECTION OF THE CRANKSHAFT IN THE VICINITY OF THE TWO REARMOST JOURNALS FOUND CRACKS RUNNING LONGITUDINALLY ACROSS JOURNALS TO THE CRANK.
- [SDR AU510001730](https://openairdocs.org/sdr/AU510001730.md): Bearing · collapsed · Dec 12, 2005 · Cessna 404 · DC Generator-Alternator
  > RT ENG DRIVEN ALT FAILED. ALT DRIVE COUPLING SHEARED AND ALT FRONT BEARING COLLAPSED. RED ELASTOMER MAT`L FROM ALT DRIVE COUPLING AND MINOR METALLIC PARTICLES VISIBLE INTERNALLY THRU ALT ATTACHMENT PORT. ALT DISASSEMBLED AND INSPECTED. FRONT BEARING SERIOU
- [SDR AU510001799](https://openairdocs.org/sdr/AU510001799.md): Switch · unserviceable · Dec 12, 2005 · Cessna 404 · Landing Gear Position and Warning
  > (AUS) RT MAIN LANDING GEAR UPLOCK MICROSWITCH FAILED. SWITCH HAD ONLY 54.5 HOURS OPERATION SINCE REPLACEMENT. (CASA NR 510001799)
- [SDR AU510001816](https://openairdocs.org/sdr/AU510001816.md): Stud · broken · Dec 12, 2005 · Cessna 404 · Reciprocating Engine Power Section
  > RT ENGINE NR 5 CYLINDER HOLD-DOWN STUDS (2OFF) BROKEN OFF FLUSH WITH THE CYLINDER BASE.
- [SDR AU510001970](https://openairdocs.org/sdr/AU510001970.md): Hub · corroded · Dec 12, 2005 · Cessna 404 · Propeller Hub Section
  > PROPELLER HUB CORRODED BEYOND LIMITS IN BLADE SOCKET AREA.
- [SDR AU510002176](https://openairdocs.org/sdr/AU510002176.md): Connector · faulty · Dec 12, 2005 · Cessna 404 · Landing Gear System Wiring
  > (AUS) RT MAIN LANDING GEAR DOWN MICROSWITCH WIRE CONNECTOR FAULTY. SUSPECT CONNECTOR WAS NOT AN APPROVED ITEM. (OTHER CAUSE: MAINTENANCE CONTROL ISSUE) (CASA NR 510002176)
- [SDR AU510001529](https://openairdocs.org/sdr/AU510001529.md): Uplock Switch · damaged · Sep 6, 2005 · Cessna 404 · Landing Gear Position and Warning
  > LT MAIN LANDING GEAR MICROSWITCH DAMAGED INTERNALLY.
- [SDR AU510002082](https://openairdocs.org/sdr/AU510002082.md): Circuit Card · failed · Aug 11, 2005 · Cessna 404 · Global Positioning System
  > GPS DATA CARD FAILED.
- [SDR AU510001856](https://openairdocs.org/sdr/AU510001856.md): Switch · failed · Mar 6, 2005 · Cessna 404 · Engine Cranking
  > LT ENGINE STARTER SWITCH FAILED. SWITCH REMAINED ENGAGED.
- [SDR 2004F00429](https://openairdocs.org/sdr/2004F00429.md): Sensor · burned out · Nov 29, 2004 · N80BS · Cessna 404 · DC Generator-Alternator
  > WHILE IN CRUISE FLIGHT, THE PILOT NOTICED SPARKS COMING FROM THE LEFT ENGINE FORWARD COWL AREA. AS A PRECAUTION, THE ENGINE WAS SHUTDOWN AND SECURED. THE AIRCRAFT THEN MADE AN UNEVENTFUL LANDING. UPON INVESTIGATION, IT WAS DISCOVERED THAT THE ALTERNATOR OUT
- [SDR AUS20040507](https://openairdocs.org/sdr/AUS20040507.md): Bearing · failed · Jun 2, 2004 · Cessna 404CESSNA · Propeller Governor
  > (AUS) LT ENGINE PROPELLER GOVERNOR FAULTY. INVESTIGATION FOUND OIL PUMP GEAR PN A20107 WORN, PIVOT PIN PN A20026 EXTREMELY WORN AND BEARING PN A20028 DESTROYED. THE HOUSING WAS GOUGED TO A DEPTH OF APPROXIMATELY 3.175MM (0.125IN) IN THE BEARING AREA AND TH
- [SDR AUS20040221](https://openairdocs.org/sdr/AUS20040221.md): Latch · failed · Mar 24, 2004 · Cessna 404CESSNA · Propeller Blade Section
  > (AUS) PROPELLER EXPERIENCED UNCOMMANDED FEATHER FOLLOWING GROUND RUN. SUSPECT CAUSED BY FAILURE OF THE LOW PITCH STOP LATCH PINS.
- [SDR AUS20031275](https://openairdocs.org/sdr/AUS20031275.md): Valve · contaminated · Dec 11, 2003 · Cessna 404CESSNA · Hydraulic System, Main
  > (AUS) HYDRAULIC SYSTEM UNLOADING VALVE CONTAINED DEBRIS UNDER THE VALVE SEAT CAUSING THE VALVE TO REMAIN PARTIALLY OPEN AND PREVENTING THE CORRECT HYDRAULIC PRESSURE FROM BEING REACHED.
- [SDR AUS20031108](https://openairdocs.org/sdr/AUS20031108.md): Switch · faulty · Oct 31, 2003 · Cessna 404CESSNA · Landing Gear Position and Warning
  > (AUS) NOSE LANDING GEAR DOWN SWITCH FAULTY.
- [SDR AUS20030977](https://openairdocs.org/sdr/AUS20030977.md): Pump · failed · Sep 18, 2003 · Cessna 404CESSNA · Fuel Boost Pump
  > (AUS) LT AND RT AUXILIARY FUEL BOOST PUMP PRESSURES BELOW REQUIRED LIMITS. ONE OF THE REPLACEMENT PUMPS ALSO HAD LOW FUEL PRESSURE.
- [SDR AUS20031029](https://openairdocs.org/sdr/AUS20031029.md): Bracket · cracked · Sep 16, 2003 · Cessna 404CESSNA · Fuselage Main, Attach Fittings
  > (AUS) ALTERNATOR CAPACITOR BRACKET FAILED ALLOWING CAPACITOR TO SHORT CIRCUIT ON POSITIVE PLATE.
- [SDR AUS20030879](https://openairdocs.org/sdr/AUS20030879.md): Regulator · fod · Aug 15, 2003 · Cessna 404CESSNA · Reciprocating Engine Oil System
  > (AUS) LT ENGINE OIL PRESSURE REGULATOR CONTAMINATED WITH FOD BETWEEN PLUNGER AND SEAT. LOSS OF ENGINE OIL PRESSURE.
- [SDR AUS20030789](https://openairdocs.org/sdr/AUS20030789.md): Cylinder · cracked · Jul 31, 2003 · Cessna 404CESSNA · Reciprocating Engine Cylinder Section
  > (AUS) ENGINE CYLINDER CRACKED.
- [SDR AUS20030718](https://openairdocs.org/sdr/AUS20030718.md): Gear · failed · Jul 16, 2003 · Cessna 404CESSNA · Engine Starter
  > (AUS) STARTER ADAPTER DRIVESHAFT GEAR TEETH STRIPPED.
- [SDR AUS20030703](https://openairdocs.org/sdr/AUS20030703.md): Connecting Rod · cracked · Jul 1, 2003 · Cessna 404CESSNA · Reciprocating Engine Power Section
  > (AUS) CONNECTING ROD CONTAINED A CRACK INDICATION ON THE SHANK BELOW THE LITTLE END.
- [SDR AUS20030720](https://openairdocs.org/sdr/AUS20030720.md): Flange · broken · Jun 10, 2003 · Cessna 404CESSNA · Magneto/Distributor
  > (AUS) MAGNETO FLANGE BROKEN. SUSPECT CAUSED BY OVERTENSIONING OF HOLD DOWN NUTS. PERSONNEL/MAINTENANCE ERROR.
- [SDR AUS20030488](https://openairdocs.org/sdr/AUS20030488.md): Bracket · cracked · Apr 24, 2003 · Cessna 404CESSNA · DC Generator-Alternator
  > (AUS) ALTERNATOR CAPACITOR RETAINING BRACKET FAILED. CAPACITOR SHORTCIRCUITING ON POSITIVE PLATE.
- [SDR CA021210005](https://openairdocs.org/sdr/CA021210005.md): Bracket · cracked · Dec 6, 2002 · Cessna 404CESSNA · Nose/Tail Landing Gear Attach Section
  > (CAN) CRACKED BRACKET FOR NOSE GEAR ACTUATOR. AFT END ATTACHES AT THIS BRACKET.
- [SDR CA021210006](https://openairdocs.org/sdr/CA021210006.md): Structure · cracked · Dec 6, 2002 · Cessna 404CESSNA · Nose/Tail Landing Gear Attach Section
  > (CAN) NOSE GEAR STRUCTURE WAS CRACKED AT ALL MOUNTING POINTS. SUSPECT UNREPORTED HARD LANDING.
- [SDR CA021210008](https://openairdocs.org/sdr/CA021210008.md): Gear · corroded · Dec 6, 2002 · Cessna 404CESSNA · DC Generator-Alternator
  > (CAN) GEAR TEETH FOUND CORRODED ON ALTERNATOR DRIVE HUB. CORRESPONDING DRIVE RING INSIDE ENGINE CHECKED OK.
- [SDR AUS20021208](https://openairdocs.org/sdr/AUS20021208.md): Line · corroded · Oct 17, 2002 · Cessna 421C · Passenger Oxygen System
  > (AUS) OXYGEN INTERCONNECT LINES CORRODED FROM THE INSIDE OUT.
- [SDR AUS20021165](https://openairdocs.org/sdr/AUS20021165.md): Bearing · broken · Oct 7, 2002 · Cessna 404CESSNA · Reciprocating Engine Power Section
  > (AUS) NO2 MAIN BEARING BROKEN. REMAINING MAIN BEARINGS MOVING SIDEWAYSCAUSING TANGS TO WEAR INTO CASE.
- [SDR AUS20021179](https://openairdocs.org/sdr/AUS20021179.md): Uplock Switch · failed · Sep 14, 2002 · Cessna 404CESSNA · Landing Gear Position and Warning
  > (AUS) RT MAIN LANDING GEAR UPLOCK SWITCH FAILED.
- [SDR AUS20021144](https://openairdocs.org/sdr/AUS20021144.md): Piston · damaged · Sep 10, 2002 · Cessna 404CESSNA · Reciprocating Engine Cylinder Section
  > (AUS) LH ENGINE NO2 CYLINDER PISTON DAMAGED. SUSPECT CAUSED BYDETONATION.
- [SDR AUS20020885](https://openairdocs.org/sdr/AUS20020885.md): Valve Spring · broken · Aug 2, 2002 · Cessna 404CESSNA · Reciprocating Engine Cylinder Section
  > (AUS) NO6 CYLINDER INNER EXHAUST VALVE SPRING BROKEN. METAL CONTAMINATION OF OIL SYSTEM.
- [SDR AUS20020911](https://openairdocs.org/sdr/AUS20020911.md): Stud · sheared · Jul 20, 2002 · Cessna 404CESSNA · Reciprocating Engine Cylinder Section
  > (AUS) CYLINDER ROCKER SHAFT BOLTS LOOSE. ONE STUD FRACTURED WITHSUBSEQUENT DAMAGE TO THE INLET VALVE PUSHROD AND TUBE.

Next page: https://openairdocs.org/engine/continental-gtsio-520-m/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 = 'GTSIO520M'
ORDER BY difficulty_date DESC
```

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

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