# Service difficulty reports: Continental GTSIO-520 series

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

Newest first. General aviation reporting is voluntary.

Page 1 of 2 · 69 reports

- [SDR 2026FA0000316](https://openairdocs.org/sdr/2026FA0000316.md): Intake Duct · loose · May 3, 2026 · N123NP · Cessna 421C · Engine Air Intake System
  > ON 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
- [SDR 2018FA0000313](https://openairdocs.org/sdr/2018FA0000313.md): Actuator · failed · Jul 31, 2018 · N427JM · Cessna 421C · Landing Gear Actuator
  > NOSE GEAR COLLAPSED DURING NORMAL LANDING, NOSE GEAR ACTUATOR FAILED - UNLOCKED.
- [SDR 2016FA0000226](https://openairdocs.org/sdr/2016FA0000226.md): Alternator · failed · May 10, 2016 · N421ZM · Cessna 421C · AC Inverter
  > RIGHT ALTERNATOR FAILED. PULLED OFF THE ALTERNATOR AND FOUND BROKEN ALTERNATOR SHAFT 1" OTBD OF DRIVE COUPLING. CAME OFF ENGINE FROM ACFT.
- [SDR 2015FA0000556](https://openairdocs.org/sdr/2015FA0000556.md): Intake Valve · failed · Nov 9, 2015 · N43BM · Cessna 421C · Reciprocating Engine Cylinder Section
  > PILOT 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.
- [SDR 2014F00141](https://openairdocs.org/sdr/2014F00141.md): Adapter · failed · Jul 31, 2014 · Cessna 421B · Engine Cranking
  > DURING 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
- [SDR 2014FA0000266](https://openairdocs.org/sdr/2014FA0000266.md): Nut · missing · Apr 23, 2014 · N459DM · Cessna 421C · Reciprocating Engine Cylinder Section
  > RT 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.
- [SDR HLF2013F00000](https://openairdocs.org/sdr/HLF2013F00000.md): Cylinder · separated · Mar 29, 2013 · N421DS · Cessna 421C · Reciprocating Engine Cylinder Section
  > DURING 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 F
- [SDR 2012FA0000672](https://openairdocs.org/sdr/2012FA0000672.md): Engine · power loss · Oct 2, 2012 · N6181N · Cessna T210M · Engine (Turbine/Turboprop)
  > DURING 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.
- [SDR 2012FA0000644](https://openairdocs.org/sdr/2012FA0000644.md): Governor · pressure loss · Sep 21, 2012 · N421GJ · Cessna 421C · Propeller Feathering/Reversing
  > ON 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
- [SDR 2012FA0000246](https://openairdocs.org/sdr/2012FA0000246.md): Gasket · failed · Mar 22, 2012 · N421AZ · Cessna 421C · Reciprocating Engine Oil System
  > OIL 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
- [SDR 2012FA0000321](https://openairdocs.org/sdr/2012FA0000321.md): Crankcase · cracked · Mar 5, 2012 · N421RX · Cessna 421C · Reciprocating Engine Power Section
  > ON COMLETION OF A ROUTINE INSPECTION, A CRACKED ENGINE CASE STARTING AT NR 5 CYLINDER AND REARWARD 2.5"
- [SDR 2010FA0000426](https://openairdocs.org/sdr/2010FA0000426.md): Control Cable · loose · Apr 23, 2010 · N22FX · Cessna 421B · Rudder Control System
  > THE 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 10
- [SDR 2010FA0000274](https://openairdocs.org/sdr/2010FA0000274.md): Clamp · cracked · Mar 9, 2010 · N1944G · Cessna 421B · Exhaust Turbocharger
  > DURING 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.
- [SDR TR7A090918001](https://openairdocs.org/sdr/TR7A090918001.md): Crankcase · cracked · Sep 18, 2009 · N297D · Cessna 421C · Reciprocating Engine Power Section
  > 1.5" 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
- [SDR 2009FA0000891](https://openairdocs.org/sdr/2009FA0000891.md): Crankshaft · broken · Apr 30, 2009 · N444EW · Cessna 421C · Reciprocating Engine Power Section
  > RECEIVED 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 TOWE
- [SDR 2009FA0000842](https://openairdocs.org/sdr/2009FA0000842.md): Cylinder · cracked · Jan 20, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > ECI REPAIRED CYLINDER FOUND TO BE CRACKED
- [SDR BXS2008F00000](https://openairdocs.org/sdr/BXS2008F00000.md): Landing Gear · malfunctioned · Dec 9, 2008 · N60RR · Cessna 421C · Landing Gear Retraction/Extension System
  > MLG 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 SWITC
- [SDR FIS2008F00000](https://openairdocs.org/sdr/FIS2008F00000.md): Fitting · cracked · Jun 4, 2008 · N934HD · Cessna 421C · Elevator Control System
  > THE COLLAR HAS A CRACK WHERE THE TAPER PIN GOES THROUGH. POSSIBLE SOMEONE OVER TORQUED THE TAPER PIN. (K)
- [SDR 2007FA0001053](https://openairdocs.org/sdr/2007FA0001053.md): Lock Plate · missing · Nov 30, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front Section
  > THIS 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 NOVEM
- [SDR 2007FA0000872](https://openairdocs.org/sdr/2007FA0000872.md): Skin · corroded · Jul 19, 2007 · N648SB · Cessna 421C · Wing, Plate/Skin
  > LT 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)
- [SDR 2007FA0000536](https://openairdocs.org/sdr/2007FA0000536.md): Line · corroded · May 30, 2007 · N377CA · Cessna 441 · Oxygen System
  > DURING 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 OC
- [SDR M1144](https://openairdocs.org/sdr/M1144.md): Exhaust Valve · broken · Feb 8, 2007 · N540CA · Cessna 421C · Reciprocating Engine Cylinder Section
  > PILOT 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.
- [SDR 2006FA0000961](https://openairdocs.org/sdr/2006FA0000961.md): Crankcase · leaking · Sep 19, 2006 · Reciprocating Engine Power Section
  > POROSITY IN CRANKCASE NOSE SECTION ON THE RT SIDE BY THE OIL GALLEY PLUG. LEAKS OIL, MFG HAS BEEN NOTIFIED. (K)
- [SDR 2006FA0000962](https://openairdocs.org/sdr/2006FA0000962.md): Crankcase · leaking · Sep 19, 2006 · Reciprocating Engine Oil System
  > POROSITY IN CRANKCASE NOSE SECTION ON THE RT SIDE BY THE OIL GALLEY PLUG. LEAKS OIL. MFG HAS BEEN NOTIFIED. (K)
- [SDR 2006FA0000908](https://openairdocs.org/sdr/2006FA0000908.md): Switch · fouled · Aug 17, 2006 · N515EK · Beech B36TC · Landing Gear Retraction/Extension System
  > LANDING 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 D
- [SDR 2006FA0000821](https://openairdocs.org/sdr/2006FA0000821.md): Hinge · corroded · Jul 26, 2006 · N485DS · Cessna 421C · Doors
  > TO 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 AS
- [SDR 2007FA0000198](https://openairdocs.org/sdr/2007FA0000198.md): Bolt · corroded · Jul 26, 2006 · N485DS · Cessna 421C · Passenger/Crew Doors
  > DURING 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 WAS
- [SDR 000](https://openairdocs.org/sdr/000.md): Bolt · departed · Mar 31, 2006 · N849JB · Cessna 421A · Main Landing Gear Strut/Axle/Truck
  > WHILE 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.
- [SDR 2006FA0000029](https://openairdocs.org/sdr/2006FA0000029.md): Distributor Gear · stripped · Dec 6, 2005 · N421CQ · Cessna 421C · Magneto/Distributor
  > PILOT 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)
- [SDR OEJ2005F00000](https://openairdocs.org/sdr/OEJ2005F00000.md): Landing Gear · failed · Oct 25, 2005 · N968J · Cessna 421B · Main Landing Gear
  > AFTER 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 OCCU
- [SDR 2005FA0001556](https://openairdocs.org/sdr/2005FA0001556.md): Rod End · failed · Oct 10, 2005 · N923CP · Cessna 421C · Landing Gear Actuator
  > ROD END ON NOSE GEAR ACTUATOR FAILED DURING ROLLOUT CAUSING THE NOSE GEAR TO COLLAPSE. (K)
- [SDR 2005FA0001313](https://openairdocs.org/sdr/2005FA0001313.md): Bellcrank · cracked · Sep 19, 2005 · N2740B · Cessna 421C · Steering Unit
  > PILOT 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.
- [SDR 2005FA0001314](https://openairdocs.org/sdr/2005FA0001314.md): Bellcrank · cracked · Sep 19, 2005 · N2740B · Cessna 421C · Steering Unit
  > PILOT 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.
- [SDR 2005FA0001259](https://openairdocs.org/sdr/2005FA0001259.md): Adapter · damaged · Sep 1, 2005 · N617CC · Cessna 421C · Engine Starter
  > METAL IN ENGINE. STARTER ADAPTER, CRANK GEAR HAD TEETH MISSING. SB WAS NEVER C/W. (K)
- [SDR TZR2005F00021](https://openairdocs.org/sdr/TZR2005F00021.md): Cylinder · cracked · Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS, LT NR 3, (SW05200509362). (K)
- [SDR 2005FA0001065](https://openairdocs.org/sdr/2005FA0001065.md): Antenna · inoperative · Apr 14, 2005 · N90193 · Cessna T207 · Central Display
  > FOUND UPPER UAT ANTENNA UNSERVICEABLE. (K)
- [SDR 2005FA0000128](https://openairdocs.org/sdr/2005FA0000128.md): Crankcase · cracked · Dec 22, 2004 · N885C · Cessna 421C · Reciprocating Engine Power Section
  > ENGINE 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)
- [SDR 2005FA0000755](https://openairdocs.org/sdr/2005FA0000755.md): Rocker · broken · Dec 20, 2004 · Cessna 421B · Reciprocating Engine Cylinder Section
  > ENGINE BECAME ROUGH IN FLIGHT ENGINE SHUTDOWN FOUND RT ENGINE NR 1 CYLINDER EXHAUST ROCKER ARM BROKEN. (K)
- [SDR 2005FA0000092](https://openairdocs.org/sdr/2005FA0000092.md): Intake Valve · broken · Nov 17, 2004 · N111KJ · Cessna 421C · Reciprocating Engine Cylinder Section
  > INTAKE 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)
- [SDR 2005FA0000704](https://openairdocs.org/sdr/2005FA0000704.md): Main Bearing · delaminated · Nov 12, 2004 · N10FF · Cessna 421C · Reciprocating Engine Power Section
  > NR 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)
- [SDR 2005FA0000677](https://openairdocs.org/sdr/2005FA0000677.md): Main Bearing · delaminated · Nov 10, 2004 · N9SD · Cessna 421B · Reciprocating Engine Power Section
  > BEARING 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)
- [SDR 2004FA0000419](https://openairdocs.org/sdr/2004FA0000419.md): Cylinder · cracked · Apr 6, 2004 · Reciprocating Engine Cylinder Section
  > RAM 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.
- [SDR 2004FA0000297](https://openairdocs.org/sdr/2004FA0000297.md): Detector · inoperative · Feb 6, 2004 · N421ZM · Cessna 421C · Stall Warning System
  > THIS 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.
- [SDR 2004FA0000069](https://openairdocs.org/sdr/2004FA0000069.md): Exhaust Riser · damaged · Dec 23, 2003 · N485DS · Cessna 421C · Engine Collector/Tailpipe/Nozzle
  > WHILE 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 CHE
- [SDR 421C111003DG](https://openairdocs.org/sdr/421C111003DG.md): Cylinder · worn · Nov 12, 2003 · N27RX · Cessna 421C · Reciprocating Engine Cylinder Section
  > ON 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 ANO
- [SDR HLF2003F00001](https://openairdocs.org/sdr/HLF2003F00001.md): Crankcase · cracked · Oct 6, 2003 · N148MA · Cessna 421C · Reciprocating Engine Power Section
  > CRACKED 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.
- [SDR CMI2003F00000](https://openairdocs.org/sdr/CMI2003F00000.md): B-Nut · undertorqued · Mar 20, 2003 · N8430N · Cessna 421C · Fuel Injector Nozzle
  > NR 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.
- [SDR 2003FA0000305](https://openairdocs.org/sdr/2003FA0000305.md): Pump · sheared · Mar 19, 2003 · N9486S · Beech V35 · Fuel Boost Pump
  > ENGINE 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 INVESTIGATIO
- [SDR IBUA121E](https://openairdocs.org/sdr/IBUA121E.md): Reservoir · leaking · Mar 19, 2003 · N84GE · Cessna 421C · Hydraulic Reservoir, Main
  > DURING 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 INSPECTI
- [SDR 2002FA0001301](https://openairdocs.org/sdr/2002FA0001301.md): Hub · cracked · Nov 6, 2002 · N5491G · Cessna 421C · Wheel/Ski/Float
  > DURING 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.

Next page: https://openairdocs.org/engine/continental-gtsio-520-series/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 = 'GTSIO520'
ORDER BY difficulty_date DESC
```

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

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