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 CA971024001Bearing · disintegrated(CAN) NR2 PROPELLER RPM BEGAN TO INCREASE AND COULD NOT BE CONTROLLED. THE NR2 ENGINE WAS SHUTDOWN. INVESTIGATION BY MAINTENANCE FOUND THE MASTER ROD BEARING FAILED, ALLOWING THE ASSOCIATED PISTONS TO OVER TRAVEL ON BOTH UP AND DOWN STROKES TO THE EXTENT THE PSDR 97ZZZX4670Through Bolt · brokenDURING AN ANNUAL INSPECTION, THE BOTTOM CRANKCASE THROUGH-BOLT LOCATED BETWEEN NR 1 AND NR 3 CYLINDER POSITION WAS FOUND BACKED OUT FROM THE CASE ALMOST TO THE POINT OF FALLING OUT OF ITS MOUNTING HOLE BY APPROXIMATELY 1.1250 INCHES. WHEN BOLT WAS REMOVED, FOSDR 98ZZZX115Lifter · galledLIFTER/CAMSHAFT GALLED. LIFTER BODY CHIP FOUND IN OIL FILTER. PRESSURE RELIEF VALVE CAUSING LOW OIL PRESSURE. ENGINE TORN DOWN, NEW PARTS INSTALLED.SDR 98ZZZX114Camshaft · galledLIFTER/CAMSHAFT GALLED. LIFTER BODY CHIP FOUND IN OIL FILTER. PRESSURE RELIEF VALVE CAUSING LOW OIL PRESSURE. ENGINE TORN DOWN, NEW PARTS INSTALLED.SDR CA971015060Camshaft · spalled(CAN) OIL FILTER INSPECTION FOUND METAL CONTAMINATION. ENGINE WAS SENT FOR INVESTIGATION AND REPAIR. DISASSEMBLY FOUND WEAR/SPALLING ON THE CAMSHAFT LOBES AND THE CAM FOLLOWERS FACE. THE CAMSHAFT AND FOLLOWERS WERE REPLACED. THE ENGINE WAS CLEANED, REASSEMBLEDSDR 97ZZZX4625Crankcase · fracturedLT CRANKCASE BROKE OFF AT THE TOP SIDE AT THE PERIMETER OF NR 2 CYLINDER BASE. SUSPECT CAUSE, FAILURE OF FWD THROUGH-BOLT NUT OR THREADS OR POSSIBLE INTERNAL FLAW IN CRANKCASE HALF.SDR 97ZZZX4574Plug · looseFLIGHT OVER THE GULF OF MEXICO. PROPELLER RPM STARTED TO DROP OFF. PROP CONTROL WAS ADVANCED, BUT AFTER ONE HOUR, PROPELLER WENT TO FEATHERED POSITION. AFTER SAFE LANDING, A VARIETY OF TESTS REVEALED THE PLUG, PN 71640, WAS LOOSE INSIDE THE CRANKSHAFT ALLOWSDR 97ZZZX4484Crankcase · crackedRIGHT ENGINE CRANKCASE CRACKED AT THE UPPER STUD AREA OF THE NR 6 CYLINDER ALLOWING THE CYLINDER TO COMPLETELY SEPARATE FROM THE CASE CAUSING ENGINE FAILURE UNDER NORMAL FLIGHT CONDITIONS. SUBMITTER RECOMMENDATION: DYE PENETRANT, INSPECTION CRANKCASE REF: ASDR 97ZZZX4379Crankcase · crackedCRANKCASE CRACKED BOTTOM NR 2 CYLINDER ATTACH, AFT .4375 INCH CYLINDER STUD.SDR CA971007015Studs · fractured(CAN) ENGINE OIL LEAK NOTICED DURING FLIGHT AND PRECAUTIONARY LANDING CARRIED OUT AT NEAREST AIRPORT. POST FLIGHT INSPECTION FOUND FIVE CYLINDER HOLDDOWN STUDS FRACTURED. ALL ENGINE PARAMETERS WERE NORMAL.SDR CA971015058Camshaft · worn(CAN) THE NR2 ENGINE OIL PAN WAS REMOVED TO FACILITATE THE REPAIR OF AN OIL LEAK. INSPECTION OF THE NOW EXPOSED AREA FOUND THE NR5 CYLINDER EXHAUST VALVE CAM LOBE BADLY WORN. THE ENGINE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.SDR CA971015056Crankcase · cracked(CAN) DURING NIGHT FLIGHT THE PILOT OBSERVED AN INCREASE IN E.G.T. ON THE NR1 ENGINE, SPARKS WERE SEEN COMING INTERMITTENTLY FROM THE EXHAUST. AIRCRAFT RETURNED TO BASE. THE FUSELAGE AND STABILIZER WERE COVERED WITH OIL. FURTHER INSPECTION FOUND THE ENGINE CRASDR 97ZZZX4779Lifter · brokenTEAR DOWN REVEALED ALL LIFTER BODY HEADS BROKEN OFF AT CAM CONTACT POINT. BROKEN PIECES THEN LODGED BETWEEN CAM LOBES AND ENGINE CASE RESULTING IN THE ENGINE CASE BEING CRACKED AND BROKEN IN SEVERAL PLACES AND LOSS OF ENGINE OIL. SUSPECT INITIAL FAILURE OF NSDR 97ZZZX4391Crankshaft · brokeWHILE IN CRUISE FLIGHT, CRANKSHAFT BROKE WHERE NR 1 ROD THROW COMES OFF REAR OF NR 2 MAIN. AIRCRAFT ON FLOATS, MADE EMERGENCY LANDING ON DRY LAKE BED. FLOATS SHEARED OFF, PLANE WENT UPSIDE DOWN, AND PLANE IS DESTROYED.SDR CA971231011Dowel · sheared(CAN) ENGINE LOG STATES STARTER CLUTCH WAS CHANGED AT AN UNDETERMINED TIME PRIOR TO THIS FAILURE. THE DOWEL ASSEMBLY THAT RETAINS THE STARTER CLUTCH ADAPTER APPEARS TO HAVE SHEARED. THIS CONDITION ALLOWED THE ADAPTER TO MOVE FREELY IN ITS BORE RESULTING IN GESDR 97ZZZX4326Connecting Rod · brokenENGIEN FAILED EXPLOSIVELY WITH NO PRIOR INDICATIONS NOTED IN MAP, OIL TEMP, OR OIL PRESSURE. ENGINE DISASSEMBLED. INDICATIONS SHOW THAT POSSIBLY THE NR 6 CYLINDER CONNECTING ROD MAY HAVE BROKE CAUSING THE CASE TO BREAK AND COME APART.SDR 97ZZZX4206Bearing · flakedENGINE REMOVED AFTER FINDING BEARING MATERIAL IN OIL SCREEN. DISASSEMBLED, FOUND ABOUT 1.5 SQUARE INCHES OF MATERIAL FLAKED OFF OF BEARING. SUSPECT POOR BOND TO BEARING.SDR 97ZZZX4449Connect Rod · brokenENGINE CONNECTING ROD BROKE AT ROD CAP .25 INCH BEFORE THREAD.SDR CA970904034Stud · sheared(CAN) ON DAILY INSPECTION THE UPPER FORWARD CYLINDER BASE STUD ON THE NR2 CYLINDER WAS FOUND SHEARED OFF. THE STUD WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.SDR 97ZZZX4633Bearing · failedTHIS ENGINE HAD 385 HOURS SINCE OVERHAUL. THE PILOT NOTED A DROP IN OIL PRESSURE HEADED FOR THE NEAREST AIRPORT 8 MILES AWAY. BEFORE REACHING THE AIRPORT, ELECTED TO MAKE AN EMERGENCY LANDING ON A ROAD. AFTER CHECKING THE SUMP SCREEN, A LARGE QUANTITY OF MESDR 97ZZZX4330Stud Assy · mistorquedLOW OIL PRESSURE; ALL EXTERIOR INSPECTION AND TESTS EXHAUSTED. REMOVED ENGINE AND DIS-ASSEMBLED. FOUND VISUAL SIGNS OF ENGINE MAIN BEARING BORE MISALIGNMENT, I.E., MAIN BEARING PATTERN COVERING ONLY 50 PERCENT OF AREA, ALL FIVE JOURNALS. LOG BOOK ENTRY SHOWSDR AU971514Crankcase · faulty(AUS) CRANKCASE FAULTY. LIMITED INFORMATION PROVIDED.SDR 97ZZZX4003Crankcase · crackedCREW REPORTED OIL LEAK, RIGHT ENGINE. UPON FURTHER INSPECTION, FOUND 1.25 INCH TO 1.5 INCH LONG CRACK IN CRANKCASE JUST AFT OF NR 2 CYLINDER, SEVENTH STUD, LOCATED IN WEB BETWEEN OIL COOLER MOUNTING AREA AND CYLINDER ATTACH AREA.SDR CA970902029Tappet · broken(CAN) SEVERE ENGINE VIBRATION IN FLIGHT. AIRCRAFT MADE FORCED LANDING. POST FLIGHT INSPECTION FOUND THE NR2 CYLINDER PUSH ROD LOOSE AND INTAKE PUSH ROD BENT. IT IS SUSPECTED THE TAPPET IS BROKEN. ENGINE WAS RETURNED TO MANUFACTURER.SDR 97ZZZX3977Crankshaft · brokePILOT REPORTED A STRONG VIBRATION FOLLOWED BY A LOUD MECHANICAL BANG IN THE ENGINE DURING FLIGHT. SECONDS LATER THE ENGINE ABRUPTLY STOPPED. AN ENGINE 'TEAR DOWN' INSPECTION WAS PERFORMED AND REVEALED THE CRANKSHAFT BROKE AT THE NR 4 'CRANKSHAFT MAIN BEARINGSDR CA970820007Crankshaft · broken(CAN) ENGINE FAILED IN FLIGHT. REPORT FROM OVERHAUL FACILITY DETERMINED THE CRANKSHAFT FAILED IN TWO (2) PLACES. THE SEPARATION OCCURRED IN THE THROW AREA (NOT THE MAIN BEARING JOURNAL). THE SUSPECTED CAUSE TO BE EITHER FATIGUE OR POSSIBLE OVERBOOST/PROP STRIKSDR 98ZZZX210Crankcase · crackedCRANKCASE INSPECTION FOUND BOTH LEFT AND RIGHT HALVES OF ENGINE CASE HAS CRACKING (LENGTHY AND THROUGH).SDR BIER970047Engine Case · crackedDURING NON-RELATED MAINTENACE, FOUND SLIGHT OIL LEAK ON ENGINE CASE, JUST AFT AND OVER ALTERNATOR ATTACH POINT, RT CASE HALF. UPON INSPECTION FOUND CASE CRACKED AT THIS POINT. SUBMITTER STATES CRACK WAS NOT OBVIOUS EXCEPT FOR OIL LINE/LEAK.SDR 97ZZZX3671Nut · brokenNUT WAS BROKEN THROUGH COMPLETELY. ALL TORQUE WAS RELEASED. THIS NUT WAS INSTALLED AT ENGINE OVERHAUL IAW CONT SB M92-9.SDR CA970820017Lifter · worn(CAN) DURING INSPECTON FINE METAL METAL (STEEL) PARTICLES WERE FOUND IN THE OIL FILTER. FURTHER INSPECTION REVEALED THE NR1 AND NR5 CYLINDERS EXHAUST VALVE LIFTERS WERE FOUND WORN ON THE LIFTER FACES. THE ENGINE WILL BE RETURNED TO CONTINENTAL TO DETERMINE THESDR 97ZZZX3978Crankshaft · failedCRANKSHAFT SEPARATED BETWEEN NR 2 ROD BEARING AND NR 2 MAIN BEARING JOURNALS. FRETTING NOTED ON CASE MATING HALVES. NR 1 CYLINDER WAS PREVIOUSLY REMOVED AND REPLACED APPROXIMATELY 555 HOURS BEFORE FAILURE OF CRANK. NR 2 MAIN BEARING HAD SHOWED SIGNS OF SPINSDR 97ZZZX3733Bolt · failedAT 500.0 HOURS TSO, THE ENGINE FAILED IN-FLIGHT. ENGINE TEAR DOWN REVEALED NR 4 CONNECTING ROD HAD FAILED, PUNCHING A HOLE THROUGH THE CRANKCASE. THE TWO CONNECTING ROD BOLTS HAD FAILED ALLOWING THE CONNECTING ROD TO COME LOOSE FROM THE CRANKSHAFT. THE BOLTSDR 97ZZZX3738Lifter · spalledDURING ROUTINE INSPECTION ON TCM FACTORY REMANUFACTURED TSIO520R (TIME 352.1 HOURS), CYLINDERS NR 1 AND NR 2 HAVE EXHAUST VALVE LEAKING. UPON CYLINDER REMOVAL AND HYDRAULIC LIFTER INSPECTION, REVEALED SPALLED LIFTERS IN NR 1 INTAKE AND EXHAUST POSTION.SDR 97ZZZX3407Connecting Rod · failedLEFT ENGINE FAILED DUE TO CONNECTING ROD FAILURE AT THE NR 4 POSITION. AREA OF WHICH ROD MAY HAVE INITIALLY FAILED, COULD BE RELATED TO LYCOMING SB 439A (INSPECTION OF CONNECTING RODS FOR FRETTING AND/OR GALLING). THE ABOVE STATMENT WAS WRITTEN AFTER DISASSESDR 97ZZZX4151Crankshaft · lockupLEFT ENGINE - SUDDEN STOPPAGE, IN-FLIGHT CRANKSHAFT LOCK-UP. ENGINE WAS RETURNED AS A CORE TO MANUFACTURER. NEW FACTORY RE-MANUFACTURED ENGINE PURCHASED.SDR 97ZZZX3873Connect Rod · failedCLIMBING THROUGH 4,000 FEET OUT OF PDX, PILOT NOTED PROMINENT VIBRATION. PILOT TRIED TO DETERMINE WHICH ENGINE WAS SOURCE OF VIBRATION, BUT WITHIN 30 SECONDS, THE LEFT ENGINE STOPPED PRODUCING POWER (DID NOT SEIZE). PROPELLER WAS FEATHERED AND AIRCRAFT RETURSDR 97ZZZX3687Camshaft · gear wornGOVERNOR WAS REMOVED DURING CRANKCASE REPAIR. GOVERNOR DRIVE GEAR TEETH WERE WORN AWAY 75 PERCENT. GOVERNOR DRIVEN GEAR INTERNAL SPLINES WERE WORN 25 PERCENT. FUEL PUMP SPLINES ON SAME GEAR WERE NOT WORN. CAMSHAFT WAS WORN .025 INCH ON DIAMETER THAT PN 6295SDR 97ZZZX3677Bearing · failedMAGNETIC RETRIEVAL TOOL PRODUCED A METAL PIECE, .870 INCH BY .210 INCH BY .100 INCH FROM CRANKCASE SUMP. INVESTIGATION DISCLOSED NR 3 MAIN BEARING WAS LOOSE IN CRANKCASE AND WAS THE SOURCE OF THE METAL FRAGMENT. DISASSEMBLY SHOWED NR 2 MAIN BEARING WAS WORKISDR BSYA610CConnect Rod · failedDURING APPROACH INTO CMH, LEFT ENGINE MADE A LOUD POP NOISE. PILOT FEATHERED ENGINE. NR 3 CYLINDER CONNECTING ROD PUT HOLE THROUGH ENGINE CASE. CAUSE AT THIS TIME UNKNOWN. (X)SDR 97ZZZX3192Link Rod · failedDURING AERIAL APPLICATION OPERATIONS, NR 9 CYLINDER CONNECTING ROD FAILED AT MASTER ROD CONNECTION PIN. SEVERE IMPACT DAMAGE TO ROD. PISTON CONTACTED CYLINDER HEAD WHICH BROKE INTO 3 PIECES. CAUSE OF FAILURE UNKNOWN AT THIS TIME.SDR 97ZZZX3187Crankshaft · crackedTHIS COMPONENT CAME OUT OF AN IN STOCK ENGINE. CRANKSHAFT FAILED UT INSPECTION PER TCM MHS-200. ALL 4 FILLET AREAS HAD INDICATIONS IN EXCESS OF 40 PERCENT FSH.SDR 97ZZZX3163Stud · failedFOUR CYLINDER ATTACH STUDS ON NR 3 CYLINDER FOUND BROKEN FOLLOWING ENGINE RUNNING ROUGH. FOUND NO EVIDENCE OF DETONATION ON TEAR DOWN.SDR AU970700Guide · failed(AUS) NO2 ENGINE FRONT SUMP PLUG CONTAMINATED WITH A SMALL PIECE OF FERROUS MATERIAL - INVESTIGATION FOUND PIECE OF METAL HAD CHIPPED OFF NO2 CYLINDER INLET VALVE TAPPET GUIDESDR AU970732Crankcase · cracked(AUS) CRANKCASE CRACKED IN AREA OF NO3 AND NO5 CYLINDER PADS - CRACKS RADIATED FROM CYLINDER BASE STUD HOLESSDR AU970853Bolt · failed(AUS) ENGINE FAILED - CAUSED BY FAILURE OF THE COUNTERWEIGHT RETAINING BOLT ALLOWING COUNTERWEIGHT TO DEPART CRANKSHAFT AND SEIZE THE ENGINESDR AU970669Crankcase · worn(AUS) CRANKCASE FRETTING IN AREA OF CRANKCASE THROUGH BOLTSSDR CA970716002Bolt · sheared(CAN) ENGINE FAILED IN FLIGHT. ON DISASSEMBLY IT WAS FOUND THAT THE CAMSHAFT GEAR SCREWS HAD SHEARED EXCEPT FOR ONE THAT WAS STILL INTACT, BUT LYING IN THE OIL SUMP. THE LOCKTABS WERE STILL BENT OVER. IT APPEARS THAT EITHER A LOCKTAB BROKE LETTING A BOLT COME SDR AU970673Crankcase · cracked(AUS) LH CRANKCASE HALF CRACKED AT TOP REAR BELOW LH MAGNETO AND CENTER BETWEEN SPINE AND NO2 CYLINDER - CRACK LENGTH 76.2MM(3IN) RUNNING FORE AND AFTSDR 97ZZZX3102Connect Rod · failedENGINE BROKE A CONNECTING ROD IN-FLIGHT. RETURNED TO BASE WITH 25 INCHES MANIFOLD PRESSURE. LANDED WITHOUT INCIDENT. ENGINE STILL RAN WITH BROKEN ROD AND DID NOT DESTROY ITSELF.SDR AU970630Crankcase · cracked(AUS) RH ENGINE CRANKCASE CRACKED ADJACENT TO NO3 CYLINDER - CRACK 82.55MM (3.25IN) INTERNAL LENGTH AND 114.3MM (4.5IN) EXTERNAL LENGTH
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