JASC 8520
Service difficulty reports · 2,214
Reports filed under 8520 · Reciprocating Engine Power Section, newest first.
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 jasc_code = '8520' 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.
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 jasc_code = '8520' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR 98ZZZX4253Crankshaft · crackedTWO INCH RADIAL CRACK WAS FOUND DURING ENGINE MAJOR OVERHAUL MAGNAFLUX INSPECTION. CRACKS WERE FOUND BEHIND PROPELLER FLANGE ON THE CRANKSHAFT. ENGINE POSSIBLY HAD A PROPELLER STRIKE AND WAS NOT RECORDED. SUBMITTER STATED ALL PILOTS AND OPERATORS NEED TO RESDR 99ZZZX272Bearing · failedDURING A TRAINING FLIGHT, THE PILOT REPORTED A LOUD RUMBLING SOUND COMING FROM THE ENGINE AND FELT A SEVERE VIBRATION. THE ENGINE NEVER QUIT AND LANDED WITH NO DAMAGE TO HELICOPTER. OIL FILTER ANALYSIS REVEALED SEVERE PARTICULATE MATTER. SUSPECTED CONNECTINGSDR 98ZZZX3457Camshaft · wornENGINE PURCHASED WITH A PARTIALLY ASSEMBLED HOMEBUILT AIRCRAFT. INFORMATION IN LOG INDICATED THE ENGINE HAS BEEN OVERHAULED APPROXIMATELY 6 HRS PRIOR TO AIRCRAFT COMPLETION. ON FIRST FLIGHT, PILOT COMPLAINT WAS LOW POWER. AFTER SEVERAL HOURS OF TROUBLESHOOTSDR 99ZZZX651Bolt · failedNR 2 MAIN JOURNAL THROUGH-BOLT WAS BROKEN AT TOP OF NR 2 CYLINDER. NO OTHER DEFECT NOTED. PILOT DID NOT STATE ABOUT ANYTHING TO CAUSE THIS, ALL OTHER ASSOCIATED ATTACH POINTS INSPECTED OK. ENGINE ONLY HAS 146.6 TSMOH AT FACTORY. PER SB 97-6, THROUGH-BOLTS SDR 98ZZZX3482Tappet · spalledFOUND METAL (FILINGS) IN ONE FILTER DURING ROUTINE OIL/FILTER CHANGE. THEY APPEARED TO BE IRON. UPON REMOVING, SEVERAL TAPPETS FROM ENGINE. FOUND ALL FACES ON REMOVED TAPPETS TO BE DEEPLY SPALLED.SDR 98ZZZX3481Tappet · spalledFOUND METAL (FILINGS) IN ONE FILTER DURING ROUTINE OIL/FILTER CHANGE. THEY APPEARED TO BE IRON. UPON REMOVING, SEVERAL TAPPETS FROM ENGINE. FOUND ALL FACES ON REMOVED TAPPETS TO BE DEEPLY SPALLED.SDR CA980908032Rod · disconnected(CAN) NR 1 AND NR 3 CONNECTING RODS WERE FOUND DISCONNECTED FROM THE CRANKSHAFT. ENGINE IS BEING SENT FOR INVESTIGATION.SDR 98ZZZX4045Connecting Rod · brokeNR 2 CONNECTING ROD BROKE AND BROKE THE CRANKCASE AND BROKE BOTH OF THE MAGS OFF THE ENGINE.SDR 98ZZZX3311Gear · fracturedENGINE FAILED WITHOUT WARNING. UPON INVESTIGATION, FOUND TIMING GEAR FRACTURED STOPPING THE MAGS. SUBMITTER STATED SUPPLIER REPORTED THEY HAVE HAD AT LEAST 5 OF THESE FAILURES IN THE LAST 5 YEARS. THEY CANNOT COME UP WITH A REASON, THEY SAID POSSIBLY TIMINGSDR 98ZZZX3245Crankshaft · flakingTHE PAINTED INSIDE DIAMETER OF CRANKSHAFT PER AD 98-02-08 AND SB 530, WAS PEELING OFF EXPOSING BARE METAL. THIS ENGINE WAS TAKEN APART DUE TO A PROPELLER SUDDEN STOPPAGE.SDR CA980825020Stud · failed(CAN) DURING INSPECTION, TWO CYLINDER HOLD-DOWN STUDS WERE FOUND BROKEN. ONE AT THE BASE OF NR 3 CYLINDER AND ONE AT THE BASE OF NR 8 CYLINDER.SDR 98ZZZX3254Crankshaft · brokenWHILE CRUSING AT 5,000 FEET, 2,300 RPM, 23 INCH MP, 62 PERCENT POWER, ENGINE SHUDDERED AND LOCKED UP. PROPELLER WAS FEATHERED AND A NORMAL LANDING MADE. ENGINE TEAR DOWN REVEALED THAT THE VAR CRANKSHAFT FAILED AT THE FORWARD CHEEK OF NR 2 ROD.SDR CA980908005Crankcase · cracked(CAN) REMOVAL OF NR 5 CYLINDER, DUE TO LOW COMPRESSION, REVEALED A CIRCUMFERENTIAL CRACK IN THE FORWARD FACE OF THE FORWARD CRANKCASE HALF. NUMEROUS CRYSTALLINE STRUCTURED CHIPS WERE FOUND IN THE MAIN OIL SCREEN. THE AMOUNT OF MATERIAL WAS NOT UNUSUAL, BUT THSDR CA980818013Crankcase · cracked(CAN) NO ENGINE OIL PRESSURE INDICATION ON STARTUP. ENGINE WAS SHUTDOWN. REAR CASE REMOVED AND INSPECTION FOUND WHAT APPEARED TO BE A CRACK ON THE REAR LOWER LEFT OF THE CRANKCASE. THE PART WAS SENT FOR EVALUATION.SDR CA980928002Crankshaft · pitted(CAN) TO COMPLY WITH AD 98-02-08, IN ACCORDANCE WITH LYCOMING SERVICE BULLETIN 505B, PITTING WAS NOTED ON THE INTERNAL BORE OF THE CRANKSHAFT. FPI CARRIED OUT, NO CRACKS WERE FOUND.SDR CA980928001Crankshaft · pitted(CAN) TO COMPLY WITH AD 98-02-08, IN ACCORDANCE WITH LYCOMING SERVICE BULLETIN 505B, PITTING WAS NOTED ON THE INTERNAL BORE OF THE CRANKSHAFT. FPI CARRIED OUT, NO CRACKS WERE FOUND.SDR CA980814006Rod · failed(CAN) AIRCRAFT LANDED DUE TO LOSS OF ENGINE POWER. INSPECTION FOUND THE NR 3 CYLINDER CONNECTING ROD WAS BROKEN. PILOT REPORTED A HYDRAULIC LOCK 14-19 HOURS EARLIER, AFTER THE FUEL PRIMER SYSTEM WAS WORKED ON. REMOVAL OF NR 3 CYLINDER REVEALED THE CENTER PRISDR AU980948Camshaft · worn(AUS) CAMSHAFT FRONT LOBE WORN.SDR CA981014012Crankshaft · corroded(CAN) AN ON-WING F.P.I. COMPLETED ON THE CRANKSHAFT BY A SUITABLY RATED AMO FOUND NO CRACKING. THE INNER DIAMETER WAS CLEANED OF CORROSION PER LYCOMING MSB 505B. THE INNER DIAMETER WAS MEASURED WITHIN LIMITS. THE INNER DIAMETER WAS STAMPED PER THE LYCOMING SDR AU980927Crankcase · cracked(AUS) RIGHT ENGINE CRANKCASE CRACKED IN AREA OF NR 1 CYLINDER MOUNT PAD. CRACK LENGTH 50.8MM (2 INCHES).SDR CA980810007Tappet · failed(CAN) PILOT REPORTED A ROUGH RUNNING ENGINE. INITIAL INVESTIGATION FOUND THE HYDRAULIC TAPPET BODY AND SYSTEM HAD FAILED ON THE NR 4 CYLINDER INTAKE SIDE. THE ENGINE IS BEING SENT FOR TEARDOWN AND INVESTIGATION. FURTHER REPORT TO FOLLOW.SDR 98ZZZX3037Stud · failedDURING 100-HOUR INSPECTION, MECHANIC NOTICED RIGHT ENGINE, NR 6 CYLINDER, PER MOST AFT AND THE LOWER TWO MOST AFT STUDS HAD BROKEN OFF FLUSH WITH THE CYLINDER BASE/SKIRT. THE CASE WAS INSPECTED FOR CRACKS, AND A CRACK APPROXIMATELY A .50 INCH LONG WAS OBSERVSDR AU981201Crankshaft · damaged(AUS) CRANKSHAFT FRONT MAIN BEARING JOURNAL SHOWED EVIDENCE OF ARCING FOLLOWING BULK STRIP FOR LIGHTNING STRIKE INSPECTION.SDR 98ZZZX3307Bearing · spunAIRCRAFT HAD A LOSS OF POWER AND A LOSS OF OIL PRESSURE DURING NORMAL FLIGHT. INSPECTION OF ENGINE AFTER EMERGENCY LANDING REVEALED A SPUN BEARING ON CRANKSHAFT AND THE NR 3 ROD WAS BROKEN.SDR 98ZZZX3415Camshaft · corrodedCORROSION PITS BEHIND EXPANSION PLATE IN CRANKSHAFT. PITS ALONG EDGE BETWEEN EXPANSION PLATE AND ID OF CRANKSHAFT. MISTAKENLY C/W AD 98-02-08. CORROSION PITS NOTED, BUT NO CRACKS.SDR 98ZZZX2807Connect Rod · failedTHIS ENGINE WAS OVERHAULED 5-27-85. TIME SINCE OVERHAUL 578 HOURS. THE CONNECTING ROD FAILED AT THE CAP/BOLT AREA. POSSIBLE BOLT FAILURE. NO FURTHER INFORMATION WAS AVAILABLE.SDR CA980814002Seal · leaking(CAN) THE SUBMITTER REPORTS AN INCREASE IN OIL LEAKS, IN CRANKSHAFT OUTPUT SEALS, IN RECENTLY OVERHAULED ENGINES. IN A PREVIOUS CASE, THE SEAL WAS FOUND LEAKING AND IN THIS CASE, THE SEAL WAS FOUND UNSEATED (HANGING LOOSE ON THE OUTPUT SHAFT). IN BOTH CASES,SDR 98ZZZX3996Crankcase · mismanufacturedAPPROXIMATELY 8.0 HOURS TIS AFTER INSTALLATION, OIL OPERATING PRESSURES FELL BELOW ALLOWABLE LIMITS, ENGINE WAS REMOVED AND FOUND TO HAVE INSUFFICIENT MATERIAL THICKNESS BETWEEN AN OIL PICK-UP CAVITY AND AN OIL PUMP HOUSING STUD BOSS. THIS CONDITION CREATED ASDR 98ZZZX3065Lifter · spalledDURING OIL CHANGE, NOTICED METAL PARTICLES IN FILTER. SENT TO CONTINENTAL AND WAS FOUND TO BE LIFTER PIECES. REMOVED ENGINE FROM SERVICE. HAVE HAD 7 ENGINES WITH PRE-MATURE LIFTER-CAM FAILURE. SUBMITTER STATED THERE ARE 29 SDR'S ON THE SAME LIFTER PART NUMSDR 98ZZZX3064Lifter · spalledDURING OIL CHANGE, NOTICED METAL PARTICLES IN FILTER. SENT TO CONTINENTAL AND WAS FOUND TO BE LIFTER PIECES. REMOVED ENGINE FROM SERVICE. HAVE HAD 7 ENGINES WITH PRE-MATURE LIFTER-CAM FAILURE. SUBMITTER STATED THERE ARE 29 SDR'S ON THE SAME LIFTER PART NUMSDR 98ZZZX2804Bolts · failedTRU-BOLTS (UPPER TWO) AND UPPER TWO CYLINDER HOLD-DOWN STUDS FOUND BROKEN ON NR 6 CYLINDER OF THE NR 1 ENGINE. CAUSED EXHAUST STACK TO BREAK AT FLANGE. EXHAUST GAS DAMAGED CROSS MEMBER OF ENGINE CRADLE, PROP GOVERNOR, COWLING AND IGNITION HARNESS.SDR CA980814003Cam · worn(CAN) NR 2 AND NR 4 CYLINDER VALVES WERE NOT OPERATING, INVESTIGATION FOUND THE FRONT CAM LOBES WERE MISSING. THE CAM WAS REPLACED AND SO WERE THE NR 2 AND NR 4 CYLINDERS. THE ENGINE WAS RETURNED TO SERVICE. AFTER 77 HOURS OF OPERATION, THE REAR CAM LOBES SDR AU981006Rod · cracked(AUS) NR 3 CYLINDER CONNECTING ROD CRACKED. FOUND USING FLUORESCENT MAGNETIC PARTICLE TECHNIQUE.SDR AU980868Tappet · spalled(AUS) TAPPET BODIES SPALLED.SDR AU980867Camshaft · worn(AUS) CAMSHAFT LOBES WORN EXCESSIVELY DUE TO TAPPET BODY SPALLING.SDR 99ZZZX97Rod · failedINVESTIGATION FOUND NR 5 CONNECTING ROD CAME APART. CAUSE UNDER INVESTIGATION.SDR AU981705Bushing · wrong part(AUS) DURING MAINTENANCE, A GAP WAS FOUND BETWEEN THE REAR FACE OF THE CRANKSHAFT FLANGE AND SHOULDER OF PROPELLER STUD ATTACH BUSHINGS. ALL BUSHINGS EXCEPT TWO INDEX BUSHINGS WERE FOUND PUSHED OUT OF SEATED POSITION. BUSHINGS WERE FOUND TO BE TOO LONG AND BSDR AU981175Bearing · failed(AUS) MAIN CRANKSHAFT BEARING BROKEN. CRANKCASE THROUGH BOLT P/N 641931-10-75 BROKEN. ALL CYLINDER FLANGE NUTS LOOSE. CRANKCASE MATING FACES FRETTED AND CRANKCASE CRACKED. METAL CONTAMINATION OF OIL FILTER. PART TC: 1,618.SDR AU981019Stud · broken(AUS) NR 1 CYLINDER HOLDDOWN STUDS BROKEN OR LOOSE.SDR 99ZZZX626Lifter · damagedENGINE REMOVED FROM SERVICE DUE TO METAL CONTAMINATION, DUE TO PREMATURE FAILURE OF TAPPET BODIES.SDR 99ZZZX625Lifter · damagedENGINE REMOVED FROM SERVICE DUE TO METAL CONTAMINATION, DUE TO PREMATURE FAILURE OF TAPPET BODIES.SDR 98ZZZX2648Lifter · failedENGINE REMOVED FROM SERVICE DUE TO METAL CONTAMINATION DUE TO PREMATURE FAILURE OF TAPPET BODIES.SDR 98ZZZX2647Lifter · failedENGINE REMOVED FROM SERVICE DUE TO METAL CONTAMINATION DUE TO PREMATURE FAILURE OF TAPPET BODIES.SDR AU980732Crankcase · cracked(AUS) RIGHT ENGINE CRANKCASE CRACKED. CRACK STARTED AT NR 6 CYLINDER TOP STUD. CRACK LENGTH 50.8 MM (2 INCHES).SDR 98ZZZX2704Cam Ring · wornENGINE O/H FACILITY NOTIFIED OWNERS OF SPECIFIC ENGINES WITH A HIGH POSSIBILITY OF DEFECTIVE CAM ROLLERS AND AXLES THAT HAD BEEN INSTALLED WITH A HIGH INCIDENT OF FAILURE RATES. UPON DISASSEMBLY OF ENGINE, IT BECAME APPARENT THAT THIS ENGINE, INDEED, HAD DEFESDR 98ZZZX2559Crankshaft · failedAIRCRAFT SUFFERED CATASTROPHIC ENGINE SEIZURE. MADE SUCCESSFUL GOLF COURSE LANDING. ENGINE DISASSEMBLY RECEIVED BROKEN CRANKSHAFT AT THE FORWARD SIDE OF NR 4 ROD JOURNAL.SDR CA980706015Crankshaft · bent(CAN) UPON DISASSEMBLY OF THE ENGINE, THE CRANKSHAFT WAS FOUND TO HAVE SLIPPED ABOUT 15-20 DEGREES ON ITS AXIS. THE CRANKSHAFT IS PRESS FIT TOGETHER.SDR CA980706014Crankshaft · bent(CAN) UPON DISASSEMBLY OF THE ENGINE,THE CRANKSHAFT WAS FOUND TO HAVE SLIPPED ABOUT 10-15 DEGREES ON ITS AXIS. THE CRANKSHAFT IS PRESS FIT TOGETHER.SDR 98ZZZX2456Connect Rod · failedPILOT ATTEMPTED GO-AROUND. HEARD A BANG AND LOST SIGNIFICANT POWER. WAS ABLE TO MAKE APPROACH TO A CROSS-RUNWAY. CABIN FILLED WITH SMOKE ON FINAL AND ENGINE FINALLY SEIZED. LANDED OK, BUT FIRE IN ENGINE COMPARTMENT CONTINUED TO BURN. FIRE WAS PUT OUT. CONSDR 98ZZZX2452Camshaft · failedOPERATOR EXPERIENCED AN IN-FLIGHT FEATHERING OF THE LEFT ENGINE AND IMMEDIA TELY SHUT DOWN. UPON INVESTIGATION, IT WAS REVEALED THE CAMSHAFT HAD BROKEN AT THE PROPELLER GOVERNOR DRIVE END. CAUSE UNKNOWN, UNIT SENT TO FACTORY FOR INSPECTION.
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