Continental IO-520-F

Service difficulty reports · 751

Newest first. General aviation reporting is voluntary.

Query with SQL
duckdb -csv -c "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 = 'IO520F'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR UATA202609092701Control Cable · misinstalledA POST MAINT FLIGHT CHECK OF ACFT WAS CONDUCTED DUE TO AN ENG CHANGE, PROPELLER CHANGE, MULTIPLE FLT CONTROL SURFACE, CONTROL SURFACE CABLE CHANGES, & AN EXTENDED PERIOD OF DOWN TIME IN MAINT (APPROX. 6YRS.) DUE TO EXTREME CORROSION & OTHER MX ITEMS. AFTER TAKAug 24, 2026 · N26TA · Cessna 207 · Elevator Tab Control SystemSDR ENHA202606010001Wire · brokenAFTER TAKE-OFF, PILOT SMELLED SMOKE AND LOOKED AT GAGES AND ENGINE OIL TEMP SHOWED "0". PILOT TURNED AROUND AND LANDED. MECHANICS FOUND A LOOSE WIRE ON MAIN BUSS, BROKEN 10 AMP CIRCUIT BREAKER AND BROKEN WIRE AT VOLTAGE REGULATOR. MECHANICS TIGHTENED LOOSE WIRMay 28, 2026 · N207YH · Cessna 207A · Electrical Power System WiringSDR ENHA20250522001Muffler · leakingPILOT REPORTED CO DETECTOR INDICATING. MECHANICS FOUND THE RIGHT HAND MUFFLER COUPLING LEAKING. MECHANICS REPLACED THE ATTACHING HARDWARE.May 21, 2025 · N207YH · Cessna 207A · Engine Exhaust SystemSDR UATA2025012301Bulkhead · crackedCRACK IN FORWARD BULKHEAD OF HORIZONTAL STABILIZER, RIGHT HAND SIDE NEAR UPPER LIGHTNING HOLE. "REPLACED BULKHEAD WITH NEW BULKHEAD 1212136-14. SEE 337 DATED 1/23/25 FOR FURTHER DETAIL."Jan 23, 2025 · N9829M · Cessna 207A · Fuselage Main, BulkheadSDR 2025FA0000063Muffler · crackedYUTE COMMUTER SERVICE AIRCRAFT N7373U HAD AN UNSCHEDULED LANDING ON 1/18/25. PILOT REPORTED LOSS OF POWER IN FLIGHT AND AN ABNORMAL NOISE COMING FROM THE ENGINE CAUSING HIM TO DIVERT FROM HIS ORIGINAL DESTINATION. MECHANICS SENT OUT TO RETRIEVE AIRCRAFT FOUNJan 18, 2025 · N7373U · Cessna 207A · Engine Collector/Tailpipe/NozzleSDR 2024FA0000071Magneto · failed inspFOUND FACTORY DEFECT WHILE PERFORMING FIRST 500-HOUR INSPECTION MAGNETO WITH TT 477.6 IN ACCORDANCE WITH SERVICE SUPPORT MANUAL X42001. COIL TAB HAD NOT BEEN INSTALLED PARALLEL WITH HOUSING TO COVER MATING SURFACE, AS SPECIFIED IN 6-2.4 5.C. THIS HAD RESULTEJan 24, 2024 · N9861Z · Cessna U206G · Magneto/DistributorSDR 2021FA0000041Pin · wornENGINE WOULD NOT STOP THROWING ALTERNATOR BELTS. FOUND REAR COUNTERWEIGHT PIN AND CHEEK BUSHINGS AS WELL AS COUNTERWEIGHT BUSHINGS EXTREMELY WORN OUR OF SERVICE LIMITS.Feb 11, 2021 · N99439 · Cessna 207A · Engine (Reciprocating)SDR EVGR20200624Tube · splitPILOT WAS TAXIING AIRCRAFT WHEN ANOTHER PERSON ON THE RAMP GRABBED HIS ATTENTION REGARDING THE LH MAIN TIRE BEING FLAT. HE STOPPED AND SHUT DOWN. WHEEL WAS REMOVED AND DISASSEMBLED. TIRE INNER TUBE WAS REPLACED AND WHEEL REINSTALLED. EXAMINATION OF THE INNJan 28, 2021 · N6153Z · Cessna U206G · Tire TubeSDR ENHAN9728MLatch · wornAT 1421 I WAS CLEARED TO TAKE OFF ON 1LAT GOLF. DURING THE TAKE OFF ROLL, THE NOSE DOOR CAME OPEN. I ABORTED THE TAKE OFF AND REQUESTED CLEARANCE TO TAXI BACK TO BASE. TOWER CLEARED ME TO TAXI ON ALPHA CHARLIE TO PARK. THEN TOWER ASKED WHY I ABORTED AND I Aug 20, 2020 · N9728M · Cessna 207A · DoorsSDR ENHA202008210001Latch · shearedDURING FLIGHT, 6.5 MILES FROM PAKN TO THE SOUTH, I EXPERIENCED TURBULENCE. THE REAR CARGO DOOR LATCHING MECHANISM(ROD THAT CONNECTS THE TWO LATCHES) SHEARED IN FLIGHT. THE REAR DOOR OPENED. TOWER CLEARED ME TO LAND AND I PROCEEDED TO LAND ON 30 NORMALLY. TAug 20, 2020 · N9946M · Cessna 207A · Cargo/Baggage DoorsSDR ENHA202008210002Latch · shearedDURING FLIGHT, 6.5 MILES FROM PAKN TO THE SOUTH, I EXPERIENCED TURBULENCE. THE REAR CARGO DOOR LATCHING MECHANISM(ROD THAT CONNECTS THE TWO LATCHES) SHEARED IN FLIGHT. THE REAR DOOR OPENED. TOWER CLEARED ME TO LAND AND I PROCEEDED TO LAND ON 30 NORMALLY. TAug 20, 2020 · N9946M · Cessna 207A · Cargo/Baggage DoorsSDR 2020FA0000338Alternator · burnedLOW VOLTAGE LIGHT ILLUMINATED. 30 SECONDS LATER A STRONG ELECTRICAL BURNING SMELL CAME FROM BEHIND THE PANEL FOLLOWED BY A VERY SMALL AMOUNT OF SMOKE. RAN ELECTRICAL FIRE IN FLIGHT CHECKLIST AND LANDED 10 MINUTES LATER IN CHEFORNAK AND CALLED MX CONTROL TO REPJul 16, 2020 · N9651M · Cessna 207A · DC Generator-AlternatorSDR 2020FA0000080Lifter · spalledPILOT REPORTED LOW OIL PRESSURE AT IDLE, REMOVED OIL PRESSURE REGULATOR AND FOUND SHARP METAL CHIP IN BOTTOM OF REGULATOR WHERE IT HAD ARRIVED AFTER FALLING OUT OF REGULATOR SEAT. PREVIOUS EXPERIENCE LED US TO BELIEVE THAT THE METAL WAS FROM A LIFTER, WE INSPJan 22, 2020 · N710MH · Cessna U206F · Reciprocating Engine Power SectionSDR ENHA20190926001Door · not closedPILOT REPORTED "DEPARTING FROM BETHEL, BACK DOOR OPENED DURING TAKEOFF ROLL. ABORTED TAKEOFF AND TAXIED BACK TO BASE." MX INSPECTED AND COULD NOT DUPLICATE.Sep 26, 2019 · N48CF · Cessna 207 · Cargo/Baggage DoorsSDR 2019FA0000211Alternator · failedWHILE IN FLIGHT THE SMELL OF BURNING ELECTRONICS WAS APPARENT IN THE CABIN. ALTERNATOR WAS TURNED OFF. ALL UNNECESSARY ELECTRONIC CIRCUITS WERE SHUT OFF USING THE ASSOCIATED CIRCUIT BREAKERS. THE FLIGHT WAS CONTINUED TO TOWARDS ITS DESTINATION WHICH WAS ABOUT Jul 6, 2019 · N206US · Cessna 206CESSNA · DC Generator-AlternatorSDR 2019F00210Engine · making metalEXPERIENCED POWER SURGES IN FLIGHT. FOLLOWED BY RPM DECLINE AND ENGINE FAILURE. UPON INSPECTION BY MECHANIC FOUND METAL IN OIL FILTER.Jun 4, 2019 · N9946M · Engine (Reciprocating)SDR ENHA2019F00207Unknown · smokePOP HEARD ON CLIMB OUT, FOLLOWED BY ELECTRICAL SMELL AND SMOKE IN CABIN.May 16, 2019 · N9728M · Cessna 207 · Air Distribution SystemSDR ENHA2019FA0000154Unknown · smokeHEARD A POP ON TAKEOFF AND NOTICED STRONG ELECTRICAL SMELL AND SMOKE.May 16, 2019 · N9728M · Cessna 207 · Air Distribution SystemSDR EVGR201908070001Pump · leakingDURING A FUEL INJECTION SYSTEM CHECK WITH PRESSURE GAUGES IT WAS NOTED THAT FUEL WAS LEAKING FROM A VENT ON THE BACK SIDE OF THE ENGINE DRIVEN FUEL PUMP JUST BELOW THE LOW PRESSURE RELIEF VALVE ADJUSTMENT SCREW (THIS ADJUSTS THE LOW UNMETERED FUEL PRESSURE). TMay 6, 2019 · N67JA · Cessna U206G · Engine Fuel PumpSDR EPUA2019022019001Ignition Lead · unknownDURING FLIGHT PILOT INDICATED ENGINE ROUGHNESS AND VIBRATION. MAINTENANCE REPLACED LEFT HAND IGNITION HARNESS AND R/H MUFFLER.Feb 19, 2019 · N9869M · Cessna 207A · Ignition Power SupplySDR ENHA618DAlternator · seizedALTERNATOR FAILURE IN FLIGHT, PILOT MADE A PRECAUTIONARY LANDING AT PRIVATE AIRSTRIP DUE TO A BURNING SMELL IN THE CABIN. UPON INSPECTION MAINTENANCE, PERSONNEL FOUND THE ALTERNATOR HAD SEIZED, AND THE BURNING SMELL WAS FROM THE BELT SLIPPING ON THE SEIZED PULFeb 18, 2019 · N207VA · Cessna 207 · DC Generator-AlternatorSDR CA180907015Alternator · failed(CAN) FAILED DURING FLIGHT, BATTERY RUN DOWN AS A RESULT. (TC# 20180907015)Sep 7, 2018 · Cessna U206F · AC Generator-AlternatorSDR EPUA2018030316001Bushing · wornTHE AIRCRAFT ENGINE HAD FREQUENT PROBLEMS WITH THE ALTERNATOR BELT COMING OFF. MAINTENANCE INSPECT THE COUNTERWEIGHT ATTACH BUSHING FOR DEFECTS. ON INSPECTION IAW SERVICE BULLETIN MSB 99-3C, IT WAS DETERMINED THAT WEAR TO BUSHING WAS FOUND TO BE .004" FROM OMar 16, 2018 · N7389U · Cessna 207A · Reciprocating Engine Power SectionSDR EPUA20180302001Bushing · wornTHE ENGINE HAD EXPERIENCE FREQUENT ALTERNATOR BELT THROWING PROBLEMS. NO FIX WAS FOUND. THE DECISION WAS MADE TO HAVE THE ENGINE INSPECTED FOR DEFECTS. FOUND EXCESSIVELY WORN CRANKSHAFT COUNTERWEIGHT BUSHINGS. THIS IS BELIEVED TO BE THE REASON THE ALTERNATMar 2, 2018 · N7384U · Cessna 207A · Reciprocating Engine Power SectionSDR 2017FA0000512Intake Valve · chippedLOW COMPRESSION DURING A 100 HOUR INSPECTION, IN ONE CYLINDER (20/80) WAS OBSERVED. BORESCOPE INSPECTION SHOWED AN INTAKE VALVE THAT HAD LOST PART OF THE LIP THAT SEALS AGAINST THE VALVE SEAT.Oct 13, 2017 · N123TM · Cessna U206F · Reciprocating Engine Cylinder SectionSDR 2017FA0000506Rocker · brinelledDURING AN ENGINE REPAIR, ONE ROCKER ARM WAS FOUND TO HAVE SEVERELY WORN AREA WHERE THE ROCKER ARM PUSHES ON THE VALVE STEM.Oct 3, 2017 · N123TM · Cessna U206F · Reciprocating Engine Cylinder SectionSDR 2017FA0000345Valve Spring · corrodedPILOT REPORTED LOSS OF POWER AND LOWERED TEMP READINGS FROM CYLINDER 2 IN FLIGHT. SHORTLY AFTER THAT ON APPROACH, HE LOST NR 4 TEMP READINGS AND MORE POWER LOSS. TROUBLESHOOTING REVEALED BROKEN INTAKE AND EXHAUST VALVE INNER SPRINGS ON NR 2 CYLINDER, BROKEN Aug 4, 2017 · Cessna U206G · Reciprocating Engine Cylinder SectionSDR EPUA20170725001Door Sill · crackedDURING A PHASE INSPECTION, THE COPILOT LOWER OUTER DOOR SILL WAS FOUND CRACKED. REPLACED WITH A NEW.Jul 16, 2017 · N17GN · Cessna 207A · Fuselage Miscellaneous StructureSDR 2017FA0000334Lifter · spalledTHE ENGINE IS A FACTORY ENGINE WITH ONLY 192.7 HOURS TT. OUR ACFT FLY ROUGHLY 400 HOURS A YEAR. WE HAVE CHANGED OUR OIL TYPE SINCE THE LAST ENGINE CHANGE TO 20W50, AND BEGAN USING ADDITIVE TO PREVENT THIS DEFECT. WE HAVE REPLACED SPALLED AND DEFECTIVE LIFTEMay 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000337Lifter · spalledTHIS ENGINE IS A FACTORY ENGINE WITH ONLY 192.7 HOURS TT. OUR ACFT FLY ROUGHLY 400 HOURS A YEAR. WE HAVE CHANGED OUR OIL TYPE SINCE THE LAST ENGINE CHANGE TO 20W50 AND BEGAN USING ADDITIVE TO PREVENT THIS DEFECT. WE HAVE REPLACED SPALLED AND DEFECTIVE LIFTEMay 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000365Lifter · spalledLIFTERS WITH SEVERE SPALLING AND ONE CAM LOBE THAT WAS WORN OUT OF TOLERANCE DUE TO A VERY BAD LIFTER. THIS LIFTER IS FACTORY AND IS DEFECTIVE AT 192.7 HRS.May 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000366Lifter · spalledLIFTERS FOUND WITH SEVERE SPALLING AND ONE CAM LOBE THAT WAS WORN OUT OF TOLERANCE DUE TO A VERY BAD LIFTER. THIS LIFTER IS FACTORY AND IS DEFECTIVE AT 192.7 HRS.May 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000369Lifter · spalledLIFTERS FOUND WITH SEVERE SPALLING AND ONE CAM LOBE THAT WAS WORN OUT OF TOLERANCE DUE TO A VERY BAD LIFTER. THIS LIFTERS IS FACTORY AND IS DEFECTIVE AT 192.7 HRS.May 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000370Lifter · spalledLIFTERS WITH SEVERE SPALLING AND ONE CAM LOBE THAT WAS WORN OUT OF TOLERANCE DUE TO A VERY BAD LIFTER. THIS LIFTER IS FACTORY AND IS DEFECTIVE AT 192.7 HRS.May 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000375Lifter · spalledTHIS ENG IS A FACTORY ENG WITH ONLY 192.7 HRS TT. OUR ACFT FLY ROUGHLY 400 HRS A YEAR. WE HAVE CHANGED OUR OIL TYPE SINCE THE LAST ENG CHANGE TO EXON ELITE 20W50 AND BEGAN USING CAMGAURD ADDITIVE TO PREVENT THIS DEFECT. MOODY AVIATION IN SPOKANE WA FLIES TWMay 12, 2017 · N9861Z · Cessna U206G · Reciprocating Engine Cylinder SectionSDR 2017FA0000352Connecting Rod · departedTHREW A CONNECTING ROD FROM EITHER NR 3 OR NR 4 CYLINDER THROUGH THE TOP OF THE CRANKCASE. DID NOT DISASSEMBLE ENGINE. SENT BACK TO MANUFACTURER.Apr 27, 2017 · N5161U · Cessna 206CESSNA · Reciprocating Engine Cylinder SectionSDR 2016FA0000464Engine · damagedAPPROX 2 MIN AFTER TAKEOFF FROM PAKN I NOTICED SMOKE IN THE COCKPIT AND BEGAN TO HEAD BACK THE AIRPORT. APPROX 30 SEC AFTER THE FIRST INDICATION OF SMOKE I HAD APPROXIMATELY A 50% REDUCTION IN POWER AND THE ENGINE BEGAN RUNNING ROUGH. BEFORE LANDING I WAS ATSep 28, 2016 · N207VA · Cessna 207 · Engine (Reciprocating)SDR 2016FA0000321Elt · failedELT DID NOT ACTIVATE AFTER THE AIRCRAFT IMPACTED THE SIDE OF A MOUNTAIN. ELT DID NOT APPEAR TO BE DAMAGED IN THE ACCIDENT.Jul 6, 2016 · N91170 · Cessna 207 · Emergency Locator BeaconSDR EPUA20160521001Muffler · contaminatedDURING TAKEOFF, PILOT REPORTS OF BURNING PLASTIC SMELL. INSPECTED ACFT & FOUND MELTED PLASTIC ON LT MUFFLER. IT IS BELIEVED THAT THE PLASTIC WAS FROM A TIE WRAP. REMOVED PLASTIC FROM MUFFLER. SUCCESSFUL OPERATIONAL CHECK FLIGHT OF ACFT WAS PERFORMED WITH NMay 21, 2016 · N9948M · Cessna 207A · Engine Noise SuppressorSDR CA160321008Cylinder · making metal(CAN) ENGINE RECEIVED FOR INSPECTION DUE TO METAL CONTAMINATION. IT WAS IDENTIFIED BY THE ENGINEER DURING INSPECTION OF THE ENGINE OIL SCREEN. IT WAS ALSO NOTED THAT THE NR 5 LOWER SPARK PLUG ELECTRODES WERE COVERED IN A NON-FERROUS METAL. AS A RESULT, CYLINDEMar 14, 2016 · Cessna U206G · Reciprocating Engine Cylinder SectionSDR CA160319001Cylinder · failed(CAN) ENGINE STARTED RUNNING ROUGH JUST AFTER TAKEOFF, PILOT RETURNED TO AIRPORT. MAINTENANCE INSPECTED ENGINE AND FOUND ZERO COMPRESSION ON NR 5 CYLINDER AND METAL CONTAMINATION IN OIL FILTER. ENGINE WAS REMOVED AND SENT TO ENGINE SHOP FOR FURTHER INVESTIGATMar 13, 2016 · Reciprocating Engine Cylinder SectionSDR P9KA2015120804Breaker Points · inoperativePILOT REPORTED ENG DIED WHEN IGNITION SWITCH MOVED TO LT POSITION. TROUBLESHOOTING REVEALED LT MAGNETO INOPERATIVE. REPLACED LT MAGNETO WITH SERVICEABLE, ALL CHECKED SATISFACTORY. PRELIMINARY INSPECTION SHOWED LT MAGNETO POINTS NOT OPENING, POSSIBLY DUE TO Dec 6, 2015 · N93021 · Cessna 207A · Magneto/DistributorSDR YAAA20151118001Shaft · shearedPILOT REPORTS SUCTION READING NIL. REMOVED VACUUM PUMP & SHAFT WAS SHEARED.Nov 18, 2015 · N7380U · Cessna 207A · Vacuum Distribution SystemSDR HXXC2016F00015Tube · failedUPON LANDING, LEFT MAIN TUBE WENT FLAT.Oct 20, 2015 · N996AK · Cessna U206E · Tire TubeSDR YAAA2015100520Switch · faultyPILOT REPORTED SMOKE COMING FROM UNDER DASH ON LANDING WHEN TURNING ON PITOT HEAT. FOUND PITOT HEAT SWITCH MELTED UNDER DASH.Oct 5, 2015 · N207JP · Cessna 207 · Pitot/Static Anti-Ice SystemSDR 2015FA0000358Crankshaft · brokenAIRCRAFT ON CLIMBOUT THROUGH 4000' EXPERIENCED SUDDEN LOSS OF POWER AND MADE A FORCED LANDING TO A HIGHWAY. INSPECTION REVEALED CRANKSHAFT BROKEN IN VICINITY OF MAIN BEARING JOURNAL JUST FORWARD OF CYLINDERS NR 1 & 2. METAL CONTAMINATION NOTED IN THE OIL SCJul 31, 2015 · N315EC · Cessna 2105A · Reciprocating Engine Power SectionSDR EPUA073115001Engine · power lossDURING A SCHEDULED FLIGHT, PILOT NOTICED ENG WAS NOT MAKING FULL POWER, PILOT RETURNED TO BASE & LANDED WITHOUT INCIDENT. REPLACED ENG ASSEMBLY DUE TO ITS TIME IN SERVICE & PREVIOUS OPERATIONAL HISTORY.Jul 31, 2015 · N9996M · Cessna 207A · Engine (Reciprocating)SDR CA150716007Fastener · detached(CAN) FOUND LT WING FUEL BLADDER INBD MIDDLE AND INBD REAR CLIPS HAD FALLEN OFF, CAUSING THE FUEL BLADDER TO DROOP AND PUT PRESSURE ON THE FUEL LEVEL TRANSMITTER FLOAT AND CAUSE A LOWER FUEL LEVEL INDICATION. CLIPS WERE REINSTALLED AND A FUEL LEVEL INDICATIONJul 13, 2015 · Cessna U206E · Fuel StorageSDR CA150706013Engine · power loss(CAN) IN CRUISE FLIGHT THE ENGINE BEGAN RUNNING VERY ROUGHLY. PILOT RETURNED TO BASE FOR MAINTENANCE. SPARK PLUGS REMOVED, INSPECTED, AND TESTED, NO FAULTS FOUND. SPARK PLUGS CLEANED AND REINSTALLED. MAG TIMING CHECKED AND FOUND TO BE OUT +4 DEG, MAGNETO TIMINJul 1, 2015 · Cessna U206E · Engine (Reciprocating)SDR CA150704002Alternator · failed(CAN) ON RUN UP PILOT DISCOVERED THE ALTERNATOR WAS NOT CHARGING. REMOVED ALTERNATOR PN DOFF10300JR, 123.9 TSOH. INSTALLED SERVICEABLE ALTERNATOR PN DOFF10300JR. RUN UP CARRIED OUT ALTERNATOR FUNCTION CHECKED OK.Jun 26, 2015 · Cessna U206E · AC Generator-Alternator
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