# Service difficulty reports: Continental GTSIO-520-L

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

Newest first. General aviation reporting is voluntary.

Page 1 of 3 · 139 reports

- [SDR 2024FA0000146](https://openairdocs.org/sdr/2024FA0000146.md): Propeller · overspeed · Dec 8, 2023 · N146T · Cessna 421C · Propeller System
  > RIGHT PROP GOVERNOR FAILED APPROACHING LEVEL OFF FROM CLIMB. ENGINE SPIKED TO OVER 6,000 RPM, ENGINE RUINED, BROUGHT PROP CONTROL BACK TO NO AVAIL. THROTTLE BACK AND MIXTURE BACK TO GET ENGINE RPM DOWN. VISUAL PROP COMPLETELY ?AT, PROP WOULD NOT FEATHER, RI
- [SDR 2023FA0000268](https://openairdocs.org/sdr/2023FA0000268.md): Cylinder · split · May 18, 2023 · N382BW · Cessna 421C · Reciprocating Engine Cylinder Section
  > AN OCCURRENCE WAS REPORTED THAT HAPPENED AT RALEIGH AIRPORT (RDU), ON THE 05/09/2023 AT 1715 EDT. THE SAID AIRCRAFT, N382BW HAD JUST GOTTEN AIRBORNE AND RECEIVED AN ADVISORY FROM ATC THAT SMOKE WAS STREAMING FROM THE LEFT ENGINE. AIRSPEED WAS AT 97 KNOTS AND T
- [SDR 2023F00043](https://openairdocs.org/sdr/2023F00043.md): Cylinder · seized · Jan 26, 2023 · N421J · Cessna 421C · Powerplant System
  > WHILE IN CRUISE FLIGHT AT 19,000 FT, PILOT NOTICED THE RIGHT ENGINE SURGING. HE SUSPECTED IT WAS A FAILED FUEL PUMP AND WHILE ATTEMPTING TO REMEDY THE SITUATION, HE THEN NOTICED MAP DROPPING AND A COMPLETE LOSS OF OIL PRESSURE. THAT IS WHEN HE DECIDED TO SHUT
- [SDR 2020FA0000524](https://openairdocs.org/sdr/2020FA0000524.md): Gear · disconnected · Nov 25, 2020 · N421BR · Cessna 421C · Engine (Reciprocating)
  > PILOT NOTED THAT RIGHT ALTERNATOR FAILED IN FLIGHT. POST FLIGHT INSPECTION FOUND ENGINE GEAR, ALTERNATOR DRIVE, RETAINING BOLTS WERE NOT INSTALLED AND TWO WERE FOUND RESTING ON THE ALTERNATOR MOUNTING POINT INSIDE ENGINE CASE. OTHER TWO BOLTS WERE NOT FOUND,
- [SDR 6DFA2019042319001](https://openairdocs.org/sdr/6DFA2019042319001.md): Heater · odor · Apr 19, 2019 · N421LE · Cessna 421C · Heating System
  > SMOKE IN CABIN DURING CRUISE. PIC TURNED ON HEATER AND FAN SWITCHES. NO HEAT, BUT FAINT BURNING SMELL. PIC LOOKED BACK SAW SMOKE AND SECURED HEATER.
- [SDR 2018FA0000484](https://openairdocs.org/sdr/2018FA0000484.md): Connector · unsecure · Nov 16, 2018 · N200DC · Cessna 421C · Engine Indicating System Wiring
  > LEFT ENGINE TACHOMETER GENERATOR CANNONPLUG VIBRATED LOOSE DUE TO NOT BEING SAFETIED AND FROM VIBRATION OF ENGINE. CANNON PLUG REATTACHED AND SAFETIED. GROUND RAN ENGINE AND OPERATED NORMALLY. SUGGEST VERIFICATION OF CANNON PLUG BEING SAFTIED DURING NORMAL MAI
- [SDR 1TLR20180425001](https://openairdocs.org/sdr/1TLR20180425001.md): Throttle Body · leaking · Apr 25, 2018 · N212R · Cessna 421C · Fuel Controlling System
  > DURING ANNUAL INSPECTION ENGINE RUNS, NOTICED FUEL LEAK EMINATING FROM THROTTLE BODY FUEL CONTROL SHAFT. LOCATION OF THE FUEL LEAK IS RIGHT ABOVE EXHAUST MANIFOLD.
- [SDR 2017FA0000615](https://openairdocs.org/sdr/2017FA0000615.md): Case · cracked · Dec 1, 2017 · N6858 · Reciprocating Engine Power Section
  > ENGINE CASE HAS A THREE INCH CRACK BETWEEN THE NR 1 AND 3 CYLINDERS.
- [SDR 2017FA0000517](https://openairdocs.org/sdr/2017FA0000517.md): Drive Shaft · sheared · Oct 18, 2017 · N88606 · Cessna 421C · AC Generator-Alternator
  > PILOT REPORTED ON APPROACH TO LANDING, A MOMENTARY RIGHT ENGINE POWER FLUCTUATION, FOLLOWED BY RIGHT ALTERNATOR FAILURE, LANDED WITHOUT INCIDENT. POST FLIGHT MAINTENANCE FOUND ALTERNATOR DRIVE SHAFT SHEARED NEAR ALTERNATOR STATOR. THE ALTERNATOR DRIVE COUPLER
- [SDR 2017FA0000364](https://openairdocs.org/sdr/2017FA0000364.md): Lifter · spalled · Mar 17, 2017 · N6794D · Cessna 421C · Reciprocating Engine Cylinder Section
  > BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT.
- [SDR TO3R20170214001](https://openairdocs.org/sdr/TO3R20170214001.md): Air Filter · separated · Feb 14, 2017 · N999DM · Cessna 421C · Engine Air Intake System
  > OUR CUSTOMER REPORTED UNEVEN IDLE AND ERRATIC EGTS ON ALL CYLINDERS. AFTER TROUBLESHOOTING WE FOUND THAT ONE OF THE FILTERS WE REPLACED AT THE AIRCRAFTS LAST ANNUAL (18 HOURS AGO)HAD LOST THE INBOARD FELT SEAL AND PARTICLES WERE FOUND THROUGHOUT UPPER DECK RE
- [SDR 2016FA0000278](https://openairdocs.org/sdr/2016FA0000278.md): Cylinder Head · cracked · Jun 7, 2016 · N421AN · Cessna 421C · Reciprocating Engine Cylinder Section
  > PILOT WAS IN CRUISE AND THE RT ENGINE STARTED TO VIBRATE. AN ALTERNATE AIRPORT WAS SELECTED AND ENROUTE THE ENGINE STARTED TO LOOSE POWER. MAINTENANCE PERSONNEL REMOVED THE COWLING AND NOTED THAT THE NR 6 CYLINDER HEAD WAS SEPARATED FROM THE BARREL. CYLINDE
- [SDR 2016FA0000085](https://openairdocs.org/sdr/2016FA0000085.md): Tube · leaking · Jan 4, 2016 · N421FN · Cessna 421C · Turbine Engine Oil System
  > PILOT NOTED AN OIL LEAK ON THE LEFT ENGINE WHILE IN CRUISE FLIGHT AND REDUCED POWER WITH AN UNEVENTFUL LANDING PERFORMED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND A LARGE HOLE IN THE BREATHER TUBE BETWEEN THE COMPRESSOR AND TURBINE LEAKING OIL AS WELL AS
- [SDR 2015FA0000480](https://openairdocs.org/sdr/2015FA0000480.md): Engine · power loss · Oct 6, 2015 · N6161X · Cessna 421C · Engine (Reciprocating)
  > LOSS OF POWER DURING CRUISE WITH A SUBSEQUENT UNSCHEDULED LANDING.
- [SDR NF2R201812210003](https://openairdocs.org/sdr/NF2R201812210003.md): Lifter · galled · Sep 4, 2015 · N421JH · Cessna 421C · Reciprocating Engine Cylinder Section
  > THE LEFT ENGINE LIFTER ARE PITTED.
- [SDR YN8R201504280001](https://openairdocs.org/sdr/YN8R201504280001.md): Bearing · worn · Apr 21, 2015 · N421RS · Cessna 421C · Magneto/Distributor
  > PILOT REPORTED NORMAL MAG DROP PRIOR TO DEPARTURE. IN CRUISE FLIGHT, PILOT FELT A SHUDDER IN THE AIRCRAFT AND LOST SOME POWER IN THE LEFT ENGINE. THIS WAS HIS DESTINATION. WE REMOVED THE COWLING ON THE LEFT ENGINE, REMOVED THE RT MAG AND FOUND IT VERY HARD
- [SDR 2014FA0000701](https://openairdocs.org/sdr/2014FA0000701.md): Crankshaft · broken · Nov 20, 2014 · N8HT · Cessna 421C · Reciprocating Engine Power Section
  > CRANKSHAFT BROKEN AT NR 3 MAIN JOURNAL. POSSIBLE INTERNAL FLAW AT MANUFACTURING.
- [SDR FAA20140131000002](https://openairdocs.org/sdr/FAA20140131000002.md): Cylinder · cracked · Jan 9, 2014 · N421RX · Cessna 421C · Reciprocating Engine Cylinder Section
  > DURING SCHEDULED INSPECTION, NOTICED LIGHT COATING OF OIL TOP FWD CASE. CLEANED AND COMPLIED WITH CSB97-9 DYE CHECK. VERIFIED CRACK FWD TOP OF NR 5 CYLINDER. NOTED FLOW DIVIDER BRACKET BROKEN FWD AND AFT OF MOUNT. 166 HRS. SINCE RAM SERVICEABLE CASE INSTALL
- [SDR 2013FA0000508](https://openairdocs.org/sdr/2013FA0000508.md): Wastegate Valve · separated · Jul 29, 2013 · N421TG · Cessna 421C · Exhaust Turbocharger
  > THREADS IN WASTEGATE ACTUATOR FAILED AT OIL FEED LINE, FITTING SEPARATED FORM ACTUATOR RELEASING ALL OIL FROM LT ENGINE DURING FLIGHT.
- [SDR 2013FA0000450](https://openairdocs.org/sdr/2013FA0000450.md): Stud · cracked · Jun 13, 2013 · N51RX · Cessna 421C · Reciprocating Engine Cylinder Section
  > ENGINE RUNNING ROUGH UNDER POWER AND NR 5 CYLINDER MONITOR COOLER THAN THE REST. DURING INSPECTION, FOUND FOUR CYLINDER STUDS MISSING AND A GAP BETWEEN CYLINDER BASE AND CRANKCASE. PERFORMED A DYE PENETRATE CHECK ON CASE AND FOUND A CRACK ON FWD TOP STUD.
- [SDR F472013F00000](https://openairdocs.org/sdr/F472013F00000.md): Tube · destroyed · Jun 6, 2013 · N789RP · Cessna 421C · Tire Tube
  > ON LANDING RT MAIN TIRE BLEW. ON TEARDOWN INSPECTION, NOTED TUBE WAS TOTALLY DESTROYED. REPLACED TIRE AND TUBE.
- [SDR 2013FA0000242](https://openairdocs.org/sdr/2013FA0000242.md): Cylinder · damaged · Apr 24, 2013 · N68685 · Cessna 421C · Reciprocating Engine Cylinder Section
  > NR 5 CYLINDER SEPARATED FORM ENGINE IN FLIGHT BENT NR5 ROD AND DAMAGED CASE. PILOT FEATHERED ENGINE ON DECENT AND LANDED WITHOUT INCIDENT.
- [SDR CA130401025](https://openairdocs.org/sdr/CA130401025.md): Crankcase · cracked · Mar 28, 2013 · Cessna 421C · Reciprocating Engine Power Section
  > (CAN) PILOT REPORTED FINDING AN OIL LEAK ON THE RT ENGINE AND ASKED MAINTENANCE TO INVESTIGATE. UPON INVESTIGATION THE SOURCE OF THE OIL WAS FOUND TO BE A CRACK ON THE RT SIDE OF THE CRANKCASE BETWEEN CYLINDER NR 3 & 5. AT LAST ENGINE O/H, THE ENGINE WAS ASSE
- [SDR CA130326001](https://openairdocs.org/sdr/CA130326001.md): Nut · split · Mar 25, 2013 · Cessna 421C · Powerplant System
  > (CAN) THE PILOT REPORTED THAT DURING A PRE-FLIGHT WALK-AROUND INSPECTION HE FOUND A LOOSE NUT IN THE RT ENGINE COWL. THE NUT WAS FOUND TO BE SPLIT ACROSS THE THREADS, DOWN ITS ENTIRE LENGTH. UPON FURTHER INSPECTION OF THE ENGINE, A FWD GEARBOX UPPER THROUGH
- [SDR 2013FA0000095](https://openairdocs.org/sdr/2013FA0000095.md): Cylinder · separated · Feb 1, 2013 · N88640 · Cessna 421C · Reciprocating Engine Cylinder Section
  > NR 5 CYLINDER HAD BARREL SEPARATION DURING FLIGHT.
- [SDR JBZA20121231005](https://openairdocs.org/sdr/JBZA20121231005.md): Autopilot Sys · malfunctioned · Dec 26, 2012 · N56RX · Cessna 421C · Autopilot System
  > PASSING THROUGH 8000FT MSL, THE AUTOPILOT SYS WENT INTO AN UNCOMMANDED NOSE PITCH OVER RAPID DESCENT. PILOT TRIED THE AUTOPILOT DISCONNECT SWITCH WHILE TRYING TO ARREST THE DESCENT WITH THE ELEVATOR BACK PRESSURE. SWITCH DID NOT DISENGAGE THE AUTOPILOT. TRI
- [SDR F472012F00000](https://openairdocs.org/sdr/F472012F00000.md): Engine · making metal · Nov 25, 2012 · N421RX · Cessna 421C · Engine (Reciprocating)
  > RT ENGINE LOSS OF POWER ON CLIMBOUT. ENGINE FEATHER. METAL IN OIL FILTER AND OIL PLUG. DAMPNER DOESN`T TRACK TRUE.
- [SDR 2012FA0000653](https://openairdocs.org/sdr/2012FA0000653.md): Governor · failed · Sep 21, 2012 · N421G · Cessna 421C · Propeller Governor
  > AFTER TAKEOFF, THE RT ENGINE PROPELLER WENT INTO A FULL FEATHER. ENGINE SHUTDOWN AUTOMATICALLY AND ONE ATTEMPT TO RESTART WAS MADE WITH NO SUCCESS. A LANDING WAS EXECUTED WITHOUT INCIDENT. SUBSEQUENT GROUND INSPECTION REVEALED AN OIL LEAKAGE AROUND PROPELLER
- [SDR 2012FA0000447](https://openairdocs.org/sdr/2012FA0000447.md): Engine · failed · Jun 20, 2012 · N82JM · Cessna 421C · Engine (Reciprocating)
  > DURING A TEST FLIGHT, HAD A RT ENGINE FAILURE AT APPROX 2500 FT, REDUCED POWER TO 34.5 INCHES OF MAP AND LEANED ENGINES TO APPROX 35 GAL/HR/SIDE. CLIMBING THROUGH 12,000 FT WITH THE POWER SET TO TOP OF THE GREEN ARC. WHILE MONITORING THE ENGINE GAUGES, NOTIC
- [SDR 2012FA0000113](https://openairdocs.org/sdr/2012FA0000113.md): Gear · broken · Feb 2, 2012 · N311JH · Cessna 421C · Reciprocating Engine Power Section
  > DURING ANNUAL INSPECTION, WHILE COMPLYING WITH AD-07-05-15 (DATED 04/16/07), STARTER ADAPTER 400-HOUR INSPECTION IAW MSB 94-4G, FOUND ONE BROKEN TOOTH ON CAMSHAFT GEAR. ENGINE DISASSEMBLED WITH NO OTHER INDICATIONS FOUND OF RELATED DEFECTS OR DAMAGE INTERNALL
- [SDR CA120117002](https://openairdocs.org/sdr/CA120117002.md): Windshield · cracked · Jan 13, 2012 · Cessna 421C · Flight Compartment Windows
  > (CAN) PILOT`S SIDE, LT, WINDSHIELD, ACRYLIC-HEATED, CRACKED IN-FLIGHT, CRUISE. ACFT WAS DEPRESSURIZED AND LANDED WITHOUT INCIDENT AT CLOSEST SUITABLE AIRPORT.
- [SDR F47A2012F00000](https://openairdocs.org/sdr/F47A2012F00000.md): Crankcase · cracked · Dec 23, 2011 · N421RX · Cessna 421C · Reciprocating Engine Power Section
  > UPON INSPECTION OF RT ENGINE, VERIFIED CRACKED RT SIDE CASE, FROM NR 5 TOP CYLINDER, AREA THRU DATA PLATE IE RAM STC SE8338SW-D-SMOX 165.2 HRS.
- [SDR U7Z2011F00000](https://openairdocs.org/sdr/U7Z2011F00000.md): Connecting Rod · cracked · Oct 12, 2011 · N12RJ · Cessna 421C · Reciprocating Engine Power Section
  > REMOVED THE ENGINE FROM RT POSITION FOR SHIPMENT BACK DUE TO A DAMAGED CASE. DAMAGE APPEARS TO BE CAUSED BY A FAILED CONNECTING ROD THAT BROKE APART AND PUNCTURED 2 LARGE HOLES IN THE CRANKCASE. BRIEF HISTORY: 325.5 HRS PRIOR TO THE FAILURE OF ENGINE, STARTE
- [SDR 2011FA0000660](https://openairdocs.org/sdr/2011FA0000660.md): Exhaust Rocker · broken · Oct 4, 2011 · N421AD · Cessna 421C · Reciprocating Engine Cylinder Section
  > PILOT STATED HE WAS IN NORMAL CRUISE, WHEN HE SUDDENLY LOST POWER AND NOTICED A VIBRATION FROM THE LT ENGINE. HE IMMEDIATELY FEATHERED THE LT ENGINE AND LANDED. INSP REVEALED THE NR 2 CYL EXHAUST ROCKER WAS SHEARED DUE TO A SUSPECTED CASTING DEFECT.
- [SDR 2011F00188](https://openairdocs.org/sdr/2011F00188.md): Oil System · low pressure · Sep 10, 2011 · N21WU · Cessna 421C · Engine Oil Indicating System
  > NO OIL PRESSURE RIGHT ENGINE. RIGHT ENGINE WOULD NOT COMPLETELY FEATHER.
- [SDR FMMA20111005001](https://openairdocs.org/sdr/FMMA20111005001.md): Unknown · malfunctioned · Sep 10, 2011 · N21WU · Cessna 421C · Propeller Feathering/Reversing
  > NO OIL PRESSURE RIGHT ENGINE. RIGHT PROPELLER WOULD NOT COMPLETELY FEATHER.
- [SDR FMMA20111005002](https://openairdocs.org/sdr/FMMA20111005002.md): Retainer · broken · Sep 10, 2011 · N21WU · Cessna 421C · Reciprocating Engine Cylinder Section
  > ROCKER SHAFT RETAINER BROKE LETTING 1/3 OF RETAINER TO DROB TO BOTTOM OF ROCKER BOX COVER WHERE IT LODGED BETWEEN END OF ROCKER ARM. PUNCHED HOLE IN COVER - LETTING OIL TO ESCAPE. PROB CAUSE: CRACKED AT ASSEMBLY.
- [SDR 2011FA0000267](https://openairdocs.org/sdr/2011FA0000267.md): Magneto · seized · Apr 8, 2011 · N5355J · Cessna 421C · Magneto/Distributor
  > PILOT REPORTED THE LT ENGINE WAS RUNNING RUFF. THE LT ENGINE WOULD NOT START WHEN TRYING TO TROUBLESHOOT. THE LT MAG HAD SEIZED UP AND DAMAGED THE RUBBER MAG DRIVE BUSHINGS AND MAG DRIVE GEAR RETAINER.
- [SDR F472011F00000](https://openairdocs.org/sdr/F472011F00000.md): Case · cracked · Mar 28, 2011 · N421RX · Cessna 421C · Reciprocating Engine Power Section
  > 10 MILES FROM LANDING, PILOT REPORTED RT ENG ROUGH AFTER TROUBLESHOOTING WITH MAG, FUEL AND PUMPS. NOTICED OIL FROM ACCESS DOOR. ENGINE WAS FEATHERED AND SECURED. MX FOUND CRACKED CASE STARTING AT NR 5 CYLINDER. TOP FWD BASE STUD TO FLOW DIVIDER. (THIS IS
- [SDR VE72010F00000](https://openairdocs.org/sdr/VE72010F00000.md): Lug · broken · Aug 22, 2010 · N87561 · Cessna 421C · Landing Gear Actuator
  > ACFT SUFFERED NOSE GEAR COLLAPSE NEAR THE END OF ITS ROLL OUT AFTER LANDING. PART OF UPPER MOUNTING BRACKET FOR NOSE GEAR ACTUATOR BROKE FREE OF AIRFRAME RELEASING DOWNLOCK CAUSING NOSE TO DROP. BOTH PROPS MADE CONTACT WITH PAVEMENT STOPPING ENGINES WHILE TU
- [SDR 2011F00141](https://openairdocs.org/sdr/2011F00141.md): Journal · mismanufactured · Jul 19, 2010 · N42ML · Cessna 421C · Reciprocating Engine Cylinder Section
  > ENGINE DEVELOPED A VIBRATION. UPON REMOVAL AND TEARDOWN, IT WAS DISCOVERED THAT THE CAM JOURNALS WERE MISSING THE NECESSARY LUBRICATION CHANNELS. IT IS THE OPINION OF REPAIR STATION+ THAT THE HOLES WERE FILLED WITH A.1875" SOLID MATERIAL CONSISTENT WITH THE
- [SDR CA090826009](https://openairdocs.org/sdr/CA090826009.md): Valve Spring · broken · Aug 9, 2009 · Cessna 421C · Reciprocating Engine Cylinder Section
  > (CAN) CREW REPORTED RT ENG RUNNING ROUGH. UPON INSP, MX FOUND NR5 CYL EXHAUST VALVE SPRING BROKEN. SPRING REPLACED AND ENG GROUND RUN NORMAL.
- [SDR CA090728008](https://openairdocs.org/sdr/CA090728008.md): Skin · cracked · Jun 29, 2009 · Cessna 421C · Fuselage Main, Plate/Skin
  > (CAN) DURING INSPECTION, REFERENCED SKIN WAS FOUND CRACKED UNDER NOSE GEAR TRUNNION BEARING SUPPORT BLOCK SPACER. CRACK THAT WAS FORMING FOLLOWED THE EXACT EDGE OF THE SPACER AND WAS APPROX 1/7TH THE PERIMETER LENGTH, OF THE SPACER. SKIN WAS SUBSEQUENTLY REP
- [SDR K4SA200901](https://openairdocs.org/sdr/K4SA200901.md): Distributor Gear · broken · Jun 24, 2009 · N421PR · Cessna 421C · Magneto/Distributor
  > AFTER LEVEL OFF FOR CRUISE, A VIBRATION OR BUFFET WAS NOTED. ALL ENGINE TEMPS AND INDICATIONS APPEARED NORMAL. WAS UNABLE TO IDENTIFY WHICH ENGINE WAS CAUSING VIBRATION/BUFFET. RETURNED TO AIRPORT AND FLIGHT WAS TERMINATED. POST FLIGHT ENGINE RUN-UP REVEAL
- [SDR 2008FA0000199](https://openairdocs.org/sdr/2008FA0000199.md): Case · cracked · Mar 18, 2008 · N12RJ · Cessna 421C · Engine (Reciprocating)
  > REMOVED THIS ENGINE FROM THE RT POSITION FOR SHIPMENT BACK TO RAM AC DUE TO A DAMAGED CASE. DAMAGE APPEARS TO BE CAUSED BY A FAILED CONNECTING ROD THAT BROKE APART AND PUNCTURED (2) LARGE HOLES IN THE CRANKCASE. BRIEF ENGINE HISTORY: 347 HOURS PRIOR TO THE F
- [SDR 2007FA0000781](https://openairdocs.org/sdr/2007FA0000781.md): Crankshaft · failed · Aug 10, 2007 · Reciprocating Engine Power Section
  > CRANKSHAFT FAILED NDI SB MSB96-10. (K)
- [SDR CA070510004](https://openairdocs.org/sdr/CA070510004.md): Cylinder · broken · Apr 20, 2007 · Cessna 421C · Reciprocating Engine Cylinder Section
  > (CAN) WHEN DOING 100 HRS INSP, FOUND DAMAGE ON COVER VALVE ROCKER CYLINDER NR 4, COVER (PN: 631834) REMOVED AND FOUND RETAINER ROCKER SHAFT (PN: 646032) BROKEN. NEW CYLINDER WAS INSTALLED IN POSITION NR 4. ALSO FOUND CYLINDER NR 2 WITH LOW COMPRESSION (50 PSI
- [SDR FAA200612001](https://openairdocs.org/sdr/FAA200612001.md): Cylinder · separated · Dec 6, 2006 · N93PJ · Cessna 421C · Reciprocating Engine Cylinder Section
  > DURING TAKEOFF ROLL PILOT REPORTED A LOUD POP FROM THE LEFT ENGINE AND THE AIRCRAFT YAWED TO THE LEFT. THE TAKEOFF WAS ABORTED. VISUAL INSPECTION REVEALED THE NUMBER SIX CYLINDER HEAD HAD SEPARATED FROM THE BARREL. THE ENGINE HAD 554 HOURS SINCE OVERHAUL. THIS
- [SDR 1234567890](https://openairdocs.org/sdr/1234567890.md): Adapter · failed · Apr 12, 2006 · N421R · Cessna 421C · Engine Starter
  > FAILURE OF STARTER ADAPTER SHAFT GEAR IN FLIGHT CAUSED ENGINE SURGING AND LOSS OF POWER. PILOT THEN FOLLOWED APPROPRIATE AFM SHUT DOWN PROCEDURES. POST FLIGHT INSPECTION REVEALED FAILURE OF THE STARTER ADAPTER SHAFT GEAR ASSEMBLY RESULTING IN METAL CONTAMINA
- [SDR N582006F00000](https://openairdocs.org/sdr/N582006F00000.md): Case Half · cracked · Feb 10, 2006 · N421RG · Cessna 421C · Reciprocating Engine Power Section
  > RT ENGINE WAS SHUTDOWN IN FLIGHT DUE TO EXTREME SHAKING. PROP FEATHERED OK AND AIRCRAFT LANDIED WITHOUT FURTHER INCIDENT. AFTER ENGINE SHUTDOWN PILOT NOTED OIL RUNNING OUT OF ENGINE ON IB SIDE. POST LANDING INSPECTION REVEALED SEPARATED CRACK ABOVE THE NR

Next page: https://openairdocs.org/engine/continental-gtsio-520-l/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 = 'GTSIO520L'
ORDER BY difficulty_date DESC
```

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

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