# Service difficulty reports: Continental IO-520 series

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

Newest first. General aviation reporting is voluntary.

Page 1 of 9 · 446 reports

- [SDR XGNA202404080001](https://openairdocs.org/sdr/XGNA202404080001.md): Engine · power loss · Apr 6, 2024 · N236CH · Beech A36 · Engine (Reciprocating)
  > DURING CLIMB A PARTIAL LOSS OF ENGINE POWER OCCURRED WITH FLUCTUATING MANIFOLD PRESSURE. ALL OTHER ENGINE PARAMETERS WERE NORMAL. MAGNETO DROPS WERE NORMAL. PILOT RETURNED TO AIRPORT.
- [SDR XGNA202404080002](https://openairdocs.org/sdr/XGNA202404080002.md): Engine · power loss · Apr 6, 2024 · N236CH · Beech A36 · Engine (Reciprocating)
  > DURING CLIMB A PARTIAL LOSS OF ENGINE POWER OCCURRED WITH FLUCTUATING MANIFOLD PRESSURE. ALL OTHER ENGINE PARAMETERS WERE NORMAL. PILOT RETURNED TO THE AIRPORT. MAGNETO DROPS WERE NORMAL.
- [SDR 2022FA0000041](https://openairdocs.org/sdr/2022FA0000041.md): None · none · Jan 21, 2022 · N488HP · Beech 100BEECH · DC Generator-Alternator
  > OPERATOR REPORTED "ALTERNATOR OUT" LIGHT ILLUMINATES INTERMITTENTLY. VISUAL INSPECTION OF WIRING AT ALTERNATOR REVEALED THE ALTERNATOR CASE HALVES WERE NOT SECURED TO EACH OTHER. FURTHER INSPECTION DETERMINED THE 4 PHILISTER HEAD SCREWS THAT HOLD THE CASE HA
- [SDR 2020FA0000331](https://openairdocs.org/sdr/2020FA0000331.md): Rod · broken · Jul 10, 2020 · N512BD · Beech V35B · Reciprocating Engine Power Section
  > DECLARED AN EMERGENCY DURING CRUISE FLIGHT AT 5500 FT. THE PILOT REPORTED ENGINE FAILURE TO ATC AND MADE A FORCED LANDING ON A HIGHWAY, APPROXIMATELY 12 MILES NORTHEAST OF THE DEPARTURE AIRFIELD..AIRCRAFT LANDED SAFELY, WITH NO DAMAGE. VISUAL INSPECTION DUR
- [SDR 2020FA0000046](https://openairdocs.org/sdr/2020FA0000046.md): Turnbuckle · corroded · Jan 15, 2020 · N5618K · Beech S35 · Aileron Control System
  > THE AIRCRAFT WAS IN OUR REPAIR SHOP FOR CYLINDER WORK. THE OWNER ASKED WHILE IT HERE, TO LOOK AT THE RIGHT AILERON TURNBUCKLE. THIS REQUEST WAS BASED ON INFORMATION FROM THE PUBLICATION DATED MARCH 2019. SUBSEQUENTLY, WE REMOVED THE SEATS AND FLOORBOARDS TO
- [SDR 4S42020F00002](https://openairdocs.org/sdr/4S42020F00002.md): Doubler · cracked · Jun 18, 2019 · N404BN · Cessna 210E · Fuselage Main, Structure
  > THE FOLLOWING IS THE INFORMATION FOR THE FAA FORM 8010-4 MALFUNCTION OR DEFECT REPORT REFERENCE CRACKS IN THE MLG ACTUATOR BULKHEAD DOUBLERS ON CESSNA 210E SN 21058705 N404BN TOTAL TIME AIRFRAME IS 5455.8 HOURS. AFTER RESEARCH OF THE ACFT LOG BOOKS IT WAS DET
- [SDR 2020FA0000087](https://openairdocs.org/sdr/2020FA0000087.md): Fork · cracked · Feb 18, 2019 · N638LD · Beech 58 · Propeller Controlling System
  > CRACK FOUND ON PITCH CHANGE FORK DURING MAGNETO PARTICLE INSPECTION. THE CRACK IS APPROXIMATELY 0.125 INCHES LONG AND IS LOCATED ON THE BOTTOM CORNER OF THE BLOCK SLOT. CRACK MAY HAVE FORMED DUE TO SERVICE FATIGUE. THERE IS NO EVIDENCE OF ABNORMAL LOAD OR O
- [SDR 2018FA0000518](https://openairdocs.org/sdr/2018FA0000518.md): Pump · broken · Jul 23, 2018 · N9410M · Cessna 210K · Hydraulic Pump (Electric/Engine), Main
  > HYDRAULIC PUMP LEAKS 5606 FROM HOUSING PARTING SURFACES DURING OPERATION. TWO HOUSING BOLTS APPEAR TO BE STRIPPED, BROKEN AND HOUSING SEAL IS EXTRUDING PAST PARTING SURFACES AROUND LEAKAGE AREA.
- [SDR 2017FA0000376](https://openairdocs.org/sdr/2017FA0000376.md): Engine · malfunctioned · Aug 8, 2017 · N88EB · Beech D55 · Engine (Turbine/Turboprop)
  > AFTER 12 - 15 MINUTES ON THE GROUND AND ENGINE RUN UP WITH NO INDICATIONS OF ANY PROBLEMS WITH ANY SYSTEMS, LEFT ENGINE HAD POWER LOSS WITHIN 1 - 2 SECONDS AFTER ROTATION WITH GEAR DOWN. RPM DOWN TO 1600 RPM, LEFT FUEL FLOW NEEDLE BOUNCING BACK AND FORTH FRO
- [SDR 2017FA0000547](https://openairdocs.org/sdr/2017FA0000547.md): Nut · backed out · Apr 11, 2017 · N27HB · Beech A36 · Power Lever
  > DURING FLIGHT, NOTICED THE THROTTLE WAS NOT RESPONDING CORRECTLY. IT HAD ADVANCED TO FULL POWER. TRIED TO TROUBLESHOOT AND EVENTUALLY FOUND THE THROTTLE STUCK AT FULL POWER. DIVERTED AND WAS ABLE TO LAND WITHOUT ANY PROBLEMS. THE ENGINE HAD BEEN REPLACED A
- [SDR 2017F00014](https://openairdocs.org/sdr/2017F00014.md): Line · failed · Dec 27, 2016 · N402R · Cessna 402C · Landing Gear Brake System
  > DURING LANDING, NOTED THAT RIGHT HAND BRAKES WERE UNRESPONSIVE. SLOWED AIRCRAFT AS BEST AS POSSIBLE AND ROLLED OFF END OF RUNWAY INTO A GRASS FIELD. AIRCRAFT SUSTAINED DAMAGE TO FUSELAGE AND LANDING GEAR.
- [SDR 2016FA0000646](https://openairdocs.org/sdr/2016FA0000646.md): Lifter · damaged · Dec 8, 2016 · N185PR · Cessna A185F · Reciprocating Engine Power Section
  > THE SURFACE OF THE LIFTER THAT CONTACT THE CAMSHAFT ARE SPALLED AND CORRODED. REPLACED THE LIFTERS.
- [SDR 2017FA0000583](https://openairdocs.org/sdr/2017FA0000583.md): Spring · worn · Nov 11, 2016 · N4918Q · Cessna A185F · Landing Gear Brake System
  > SPRING TENSION WEAKENED OVER TIME AND DEFORMED CAUSING BLOCKAGE AND INABILITY TO PROPERLY BLEED AND SERVICE SYSTEM CAUSING BRAKE FAILURE ON LANDING AND SUBSEQUENT GROUND LOOP WITH DAMAGE TO RT WING AND RT HORIZONTAL.
- [SDR 2016FA0000326](https://openairdocs.org/sdr/2016FA0000326.md): Clamp · failed · Jul 13, 2016 · N5245C · Cessna 310C · Aircraft Fuel Distribution System
  > HOSE CLAMP ASSEMBLY FAILED ON THE FUEL INDUCTION SYSTEM CAUSING ENGINE TO FAIL.
- [SDR 2015FA0000519](https://openairdocs.org/sdr/2015FA0000519.md): Bolt · corroded · Aug 31, 2015 · N186AZ · Cessna 185F · Main Landing Gear Strut/Axle/Truck
  > AFTER LANDING, DURING THE LANDING ROLL THE LT MAIN GEAR WHEEL COLLAPSED. RESULTING IN DAMAGE TO THE LT WING AND LT SIDE OF FUSELAGE. DURING THE INSPECTION OF THE WHEEL ASSEMBLY, IT WAS OBSERVED THAT 2 OF THE LT GEAR WHEEL ATTACH BOLTS WHICH HAD SHEARED OFF,
- [SDR 2015FA0000278](https://openairdocs.org/sdr/2015FA0000278.md): Warning Light · illuminated · Jun 19, 2015 · N7984M · Beech 35C33A · Electrical Power System
  > AIRCRAFT OVERVOLTAGE LIGHT ILLUMINATED.
- [SDR CA150330004](https://openairdocs.org/sdr/CA150330004.md): Attach Fitting · cracked · Mar 30, 2015 · Cessna A185F · Fuselage, Landing Gear Attach Fittings
  > (CAN) DURING REMOVAL OF ACFT SEAPLANE FLOATS FOR ACFT CORROSION INSPECTIONS, IT WAS FOUND THAT BOTH RT AND LT FORWARD FUSELAGE ATTACH FITTINGS WERE CRACKED. BOTH FITTINGS WILL REQUIRE REPLACEMENT AT THE REINSTALLAION OF THE FLOAT ASSEMBLIES.
- [SDR KC2R2015020549760](https://openairdocs.org/sdr/KC2R2015020549760.md): Impulse Coupling · cracked · Feb 4, 2015 · N380PC · Beech A36 · Magneto/Distributor
  > IMPULSE COUPLING FOUND TO BE CRACKED AT ADVANCE STOP NOTCHES OF BASE PLATE. DEFECT WAS DISCOVERED USING MAGNETIC PARTICLE INSPECTION OF PART DURING PERFORMANCE OF MFG RECOMMENDED-500 HOUR INSPECTION. BOTH MAGS ON THIS ENGINE SHOW SAME DEFECT.
- [SDR EPUA20150204001](https://openairdocs.org/sdr/EPUA20150204001.md): Magneto · malfunctioned · Feb 4, 2015 · N7389U · Cessna 207A · Magneto/Distributor
  > DURING CRUISE PILOT NOTICED RPM LOSS & VIBRATION FROM THE ENG. ACFT RETURNED & LANDED SAFELY WITHOUT INCIDENCE. INSPECTED ENG & REPLACED BOTH MAGNETOS & ALL SPARK PLUGS.
- [SDR CTUR2015FA0000020](https://openairdocs.org/sdr/CTUR2015FA0000020.md): Retaining Ring · dislodged · Dec 31, 2014 · N8229M · Cessna 210K · Landing Gear Actuator
  > THE RETAINING RING DISLODGED FROM THE RETAINING RING GROVE, WHICH ALLOWED THE PISTON AND ROD AND MAIN GEAR ACTUATOR GLAND TO SEPARATE FROM THE MAIN GEAR ACTUATOR CYLINDER PREVENT HYDRAULIC PRESSURE FROM BUILDING WHICH IS NECESSARY TO OPEN THE MAIN.
- [SDR KC2R1218201449621](https://openairdocs.org/sdr/KC2R1218201449621.md): Impulse Coupling · cracked · Dec 18, 2014 · N434G · Beech A45 · Magneto/Distributor
  > DURING A ROUTINE 500 HR INSPECTION OF THE MAGNETOS, FOUND BOTH IMPULSE COUPLINGS CRACKED AT HUB PLATE, NEAR FULL ADVANCE STOP NOTCH.
- [SDR KC2R2014111749540](https://openairdocs.org/sdr/KC2R2014111749540.md): Impulse Coupling · cracked · Nov 17, 2014 · N9070S · Beech F33A · Magneto/Distributor
  > DURING A 500 HR INSPECTION ON THE MAGNETOS, IT WAS DISCOVERED THAT IMPULSE COUPLING HAD CRACKS IN FLYWEIGHT BASE PLATE. CRACKS DETECTED USING MAGNETIC PARTICLE INSPECTION. CRACKS ORIGINATED FROM SHARP CORNERED FEATURE OF BASE PLATE THAT FORMS THE FULL ADVANCE
- [SDR 2014FA0000541](https://openairdocs.org/sdr/2014FA0000541.md): Cylinder · burst · Aug 10, 2014 · N698D · Cessna 414 · Propeller Assembly
  > PROPELLER CYLINDER C3550 BURST FROM OIL PRESSURE, PROBABLE FROM GOVERNOR. GOVERNOR MUST BE TESTED BEFORE PROPELLER REINSTALLED. PROPELLER HUB SERIAL 700239. REJECTED DUE TO FORCE PUT ON SCREW HOLES.
- [SDR BSYA20140715001](https://openairdocs.org/sdr/BSYA20140715001.md): Battery · failed · Jul 15, 2014 · N732CQ · Cessna 210L · Battery/Charger System
  > PILOT HAD A COMPLETE ELEC FAILURE AFTER TAKEOFF & RETURNED SAFELY.
- [SDR EPUA20140515001](https://openairdocs.org/sdr/EPUA20140515001.md): Adapter · failed · May 14, 2014 · N91002 · Cessna 207 · Engine Starter
  > PILOT REPORTS THAT THE STARTER WAS SLIPPING. THE STARTER DRIVE ADAPTER SPRING WAS BROKEN & HAD DAMAGED THE CRANKSHAFT GEAR RETAINING BOLTS & SAFETY WIRE. THE SAFETY WIRE WAS BROKEN & OIL SYS CONTAMINATION WAS POSSIBLE DUE TO THIS. THE ENG WILL NEED TO BE RE
- [SDR AU3R20140515001](https://openairdocs.org/sdr/AU3R20140515001.md): Heater · dislodged · May 14, 2014 · N2882W · Beech A36 · Heating System
  > DURING REMOVAL OF THE LT LOWER SIDE ENGINE COMPARTMENT INSPECTION PANEL, THE LT SUMP HEATER WAS FOUND DISLOGGED AND WRAPPED AROUND THE THROTTLE ARM AND CABLE.
- [SDR 2014FA0000305](https://openairdocs.org/sdr/2014FA0000305.md): Drag Link · failed · Apr 25, 2014 · N9957R · Cessna U206C · Nose/Tail Landing Gear
  > NOSE GEAR COLLAPSE, ON LANDING. STRUCTURAL, PROPELLER, AND SUSPECTED ENGINE DAMAGE OCCURRED. INVESTIGATION REVEALED THAT THE NOSE GEAR DRAG LINK ASSEMBLY BROKEN AT THE WELD AT THE UPPER ATTACH POINT. IN CONTACT WITH MFG CONCERNING DISPOSITION.
- [SDR EPUA20140414001](https://openairdocs.org/sdr/EPUA20140414001.md): Adapter · failed · Apr 11, 2014 · N23CF · Cessna 207A · Engine Starter
  > ENGINE WOULD NOT START. THE STARTER DRIVE ADAPTER FAILED. IT WAS FOUND THAT THE STARTER DRIVE ADAPTER SPRING CONTACTED THE CRANKSHAFT FLYWHEEL RETAINING BOLTS & DAMAGED THE SAFETY WIRE FOR THE RETAINING BOLTS. VERIFIED TORQUE OF BOLTS & SAFETIED.
- [SDR EPUA20140131001](https://openairdocs.org/sdr/EPUA20140131001.md): Lifter · dirty · Jan 29, 2014 · N73067 · Cessna 207A · Reciprocating Engine Power Section
  > ENGINE ROUGH, BACKFIRES AT LOW POWER SETTINGS. CLEANED NR 1 INTAKE LIFTER & REINSTALLED. OPERATIONS CHECKED GOOD.
- [SDR EPUA20131010001](https://openairdocs.org/sdr/EPUA20131010001.md): Distributor Gear · broken · Oct 8, 2013 · N7340U · Cessna 207A · Magneto/Distributor
  > DURING FLIGHT THE LT MAGNETO WAS NOT OPERATING CORRECTLY. IN THE COURSE OF NON ROUTINE MAINTENANCE THE LT MAGNETO WAS FOUND TO HAVE A BROKEN DISTRIBUTOR GEAR. FURTHER MAINT REVEALED THAT THE RT MAG HAD A 200 RPM DROP WHICH IS OUT OF OPS LIMITS. ALTHOROUGH IN
- [SDR BSYR201309252062](https://openairdocs.org/sdr/BSYR201309252062.md): Engine · surges · Sep 25, 2013 · N95BB · Beech 58 · Engine (Reciprocating)
  > AFTER TAKEOFF, LT ENGINE STARTED TO SURGE. PILOT NOTICED FUEL PRESSURE WAS FOLLOWING THE SURGE. SHUTDOWN LT ENGINE AND RETURNED AND LANDED SAFELY WITHOUT INCIDENT. OPEN
- [SDR BSYR20130723054](https://openairdocs.org/sdr/BSYR20130723054.md): Landing Gear · malfunctioned · Jul 22, 2013 · N274CS · Cessna 210L · Landing Gear Retraction/Extension System
  > AFTER TAKEOFF, LANDING GEAR WOULD NOT RETRACT. PILOT RETURNED AND LANDED SAFELY WITHOUT INCIDENT. OPEN
- [SDR 2013FA0000286](https://openairdocs.org/sdr/2013FA0000286.md): Circuit Breaker · failed · May 17, 2013 · N5609S · Beech F33A · Exterior Lighting
  > PILOT REPORTED THE NAV LIGHT AS BEING INOPERATIVE. DURING TROUBLESHOOTING, FOUND THE CIRCUIT BREAKER TO BE AT FAULT. NO PROBABLE CAUSE AT THIS TIME. REPLACED THE CIRCUIT BREAKER.
- [SDR MKT2013F00000](https://openairdocs.org/sdr/MKT2013F00000.md): Tube · split · Apr 16, 2013 · N8988P · Cessna U206E · Tire
  > THIS IS 1 OF ABOUT 10 INNER TUBES WE HAVE HAD SPLIT IN A SEAM AND CAUSED A FLAT TIRE, THERE HAVE BEEN NO SIGN OF A HOLE IN THESE TIRES AND NO HARD LANDING, NOT OVER INFLATED, JUST A SPLIT SEAM IN THE TUBE.
- [SDR VJ3R20130406001](https://openairdocs.org/sdr/VJ3R20130406001.md): Relay · intermittent · Apr 6, 2013 · N8251C · Beech F33A · Landing Gear Retraction/Extension System
  > DURING THE SECOND LANDING AT AIRPORT, THE CREW SELECTED GEAR DOWN, THE GEAR SHOWED DOWN AND LOCKED AND CREW SAW AND SMELLED SMOKE. THE LANDING GEAR CIRCUIT BREAKER TRIPPED AFTER GEAR COMPLETED CYCLE. MX CONFIRMED SOURCE OF SMOKE WAS FROM THE LANDING GEAR ACT
- [SDR 2013FA0000204](https://openairdocs.org/sdr/2013FA0000204.md): Circuit Breaker · failed · Mar 30, 2013 · N8101C · Beech F33A · Exterior Lighting
  > PILOT REPORTED THE LANDING LIGHT AS BEING INOPERATIVE. DURING TROUBLESHOOTING THE TECHNICIAN FOUND THE CIRCUIT BREAKER TO BE AT FAULT. NO PROBABLE CAUSE AT THIS TIME. REPLACED THE CIRCUIT BREAKER.
- [SDR 2013FA0000220](https://openairdocs.org/sdr/2013FA0000220.md): Line · leaking · Mar 21, 2013 · N617AX · Cessna 310R · Aircraft Fuel Distribution System
  > PILOT REPORTED FUEL ODOR IN CABIN. AFTER INSPECTION, IT WAS DETERMINED THAT THE RIGID FUEL CROSSFEED LINES THAT RUN THROUGH THE FUSELAGE, INSIDE THE MAIN SPAR BOX, HAD CORRODED INTERNALLY RESULTING IN FUEL POOLING IN THE LOWER SPAR BOX. THIS OCCURRED IN OCT
- [SDR 2013FA0000132](https://openairdocs.org/sdr/2013FA0000132.md): O-Ring · failed · Feb 20, 2013 · N210Y · Cessna 210K · Nose/Tail Landing Gear Strut/Axle
  > INTERNAL O-RING FAILED AND UPLOCK WOULD NOT RELEASE NOSE GEAR, RESULTING IN GEAR NOT EXTENDING, PROP DAMAGE, SUDDEN ENGINE STOPPAGE, AND LOWER SKIN DAMAGE.
- [SDR 2012FA0000805](https://openairdocs.org/sdr/2012FA0000805.md): Lifter · spalled · Dec 7, 2012 · N933A · Beech F33A · Reciprocating Engine Power Section
  > SMALL METALLIC PARTICLES NOTED IN OIL FILTER. SHARP EDGES, NOTED ON PARTICLES UNDER MAGNIFIED VISUAL INSPECTION, INDICATED POSSIBILITY OF LIFTER FACE SPALLING. REMOVED SAMPLE LIFTER AND NOTED SPALLING ACROSS FACE. R & R ALL LIFTERS IN ENGINE AND INSPECTED C
- [SDR CA121126014](https://openairdocs.org/sdr/CA121126014.md): Pivot · cracked · Nov 12, 2012 · Cessna 182B · Wheel/Ski/Float
  > (CAN) CRACK DISCOVERED ON THE TUBE OF THE BOW WHEEL PIVOT ASSY. CRACK FORMED CLOSE TO WHERE THE ARM ASSY MOUNTS TO THE BOW OF THE FLOAT.
- [SDR 2012FA0000684](https://openairdocs.org/sdr/2012FA0000684.md): Bolt · sheared · Sep 13, 2012 · N4786Q · Cessna A185F · Main Landing Gear
  > AFT HYDRAULIC ACTUATOR BOLT WAS FOUND TO BE SHEARED IN HALF AND DISPLACED FROM ITS DESIGNED LOCATION. THE FAILURE OCCURRED DURING SKI ACTUATION WHILE AIRBORNE, FOLLOWING USE ON HARD/BREAKABLE CRUST SNOW SURFACES DURING PREVIOUS FLIGHTS. FURTHER INSPECTION OF
- [SDR 2012FA0000584](https://openairdocs.org/sdr/2012FA0000584.md): Circuit Breaker · failed · Aug 20, 2012 · N1569A · Beech F33A · Air Conditioning System Wiring
  > PILOT REPORTED VENT BLOWER NOT WORKING. DURING TROUBLESHOOTING, THE TECH FOUND THE CIRCUIT BREAKER AT FAULT. INSTALLED A NEW CIRCUIT BREAKER. OPS CHECK NORMAL.
- [SDR 2012FA0000585](https://openairdocs.org/sdr/2012FA0000585.md): Circuit Breaker · failed · Aug 20, 2012 · N1564A · Beech F33A · Exterior Lighting
  > PILOT REPORTED TAXI LIGHT NOT WORKING. DURING TROUBLESHOOTING THE TECHNICIAN FOUND THE CIRCUIT BREAKER AT FAULT. INSTALLED A NEW CIRCUIT BREAKER. OPS CHECK NORMAL. NO PROBABLE CAUSE OR RECOMMENDATIONS AT THIS TIME.
- [SDR 2012FA0000495](https://openairdocs.org/sdr/2012FA0000495.md): Retainer · backed out · Jun 18, 2012 · N714KH · Cessna A185F · Wheel/Ski/Float
  > DURING TAXI, LT WHEEL OUTER TIRE RETAINER HARDWARE BACKED OUT AND PULLED THREADS FROM INNER WHEEL HUB, OUTER TIRE RETAINER DEPARTED AND ALLOWED TIRE AND TUBE TO DEPART AS WELL. THE ACFT WAS STOPPED AND NO OTHER DAMAGE NOTED.
- [SDR 2012FA0000363](https://openairdocs.org/sdr/2012FA0000363.md): Blade · gouged · May 30, 2012 · N201WC · Beech A36 · Propeller Blade Section
  > NOTICED OIL ON NOSE COWL. PROP REMOVED TO REPLACE CRANKSHAFT O-RING. BUT DURING REMOVAL, IT WAS DISCOVERED THAT THE SEEPAGE WAS ACTUALLY COMING FROM A BLADE. SEEPAGE WAS CONSIDERED MINOR AND PROPELLER OPERATION APPEARED NORMAL. REPAIR SHOP DISCOVERED DURIN
- [SDR CA120618005](https://openairdocs.org/sdr/CA120618005.md): Cylinder · damaged · May 26, 2012 · Cessna A185F · Reciprocating Engine Cylinder Section
  > (CAN) ALL CYLINDERS REPLACED DUE TO VALVE GUIDES BEING TOO TIGHT & BENDING THE PUSH RODS.
- [SDR 2012FA0000249](https://openairdocs.org/sdr/2012FA0000249.md): Circuit Breaker · failed · Apr 28, 2012 · N8240T · Beech F33A · Exterior Lighting
  > PILOT REPORTED STROBE LIGHTS TO BE INOPERATIVE. DURING TROUBLESHOOTING, FOUND THE STROBE LIGHT CIRCUIT BREAKER TO BE AT FAULT. INSTALLED A NEW STROBE LIGHT CIRCUIT BREAKER. OPS CHECKED GOOD.
- [SDR CA120620008](https://openairdocs.org/sdr/CA120620008.md): Crankshaft · failed · Mar 26, 2012 · Cessna A185F · Reciprocating Engine Power Section
  > (CAN) ACFT ENG SN 282949-R CRANKCASE FAILURE, 7TH STUD CRANKCASE, CRANKCASE FRETTING ON NR 2 & 3 INTERMEDIATE BEARING SADDLE THRU-BOLT PADS. WHEN THIS OCCURS, THE PINCH FIT IS LOST ON THE MAIN BEARINGS IN THESE POSITIONS & THEY BECOME LOOSE. AS A RESULT, THE
- [SDR BSYA20120215009](https://openairdocs.org/sdr/BSYA20120215009.md): Cylinder Head · cracked · Feb 15, 2012 · N17708 · Beech 58 · Reciprocating Engine Cylinder Section
  > ON DESCENT INTO LWM, LEFT ENGINE STARTED BACK FIRING WHEN THROTTLE PULLED BACK. MAINTENANCE FOUND NR 1 AND NR 3 CYLINDER HEADS CRACKED. MAINTENANCE REPLACED NR 1 AND NR 3 CYLINDERS, RUN UP AND OPERATIONAL CHECK NORMAL. NO FURTHER DEFECTS NOTED.
- [SDR 2012FA0000184](https://openairdocs.org/sdr/2012FA0000184.md): Hub · cracked · Feb 10, 2012 · N866PH · Cessna A185F · Propeller Hub Section
  > PROP ASSY WAS SUBMITTED FOR O/H AND OIL LEAK FROM CRACK. CRACK EXTENDS FROM BLADE NR 1 PORTAL THROUGH THE CYL MOUNTING SURFACE.

Next page: https://openairdocs.org/engine/continental-io-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 = 'IO520'
ORDER BY difficulty_date DESC
```

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

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