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 CA960227007Studs · broken(CAN) DURING CRUISE FLIGHT, THE RIGHT ENGINE BEGAN TO RUN ROUGH, AND LOST SOME POWER. THE CREW WAS UNABLE TO IMPROVE THE SITUATION WITH MAGS/MIXTURE AND ELECTED TO DO A PRECAUTIONARY ENGINE SHUT DOWN. AIRCRAFT LANDED WITHOUT INCIDENT. INVESTIGATION REVEALED 4 SDR 96ZZZX1142Camshaft · failedRIGHT ENGINE STARTED TO BACKFIRE AND RUN ROUGH. ENGINE WAS SHUT DOWN IN-FLIGHT AND PROP FEATHERED. UPON TROUBLESHOOTING, FOUND VALVES ON REAR CYLINDERS NOT ACTUATING. SUSPECT BROKEN CAM GEAR. ENGINE WAS REMOVED FOR REPAIR AND A SERVICEABLE ENGINE WAS INSTASDR CA960227013Connecting Rod · broken(CAN) #5 CONNECTING ROD FAILED AND FRACTURED R/H HALF OF CRANKCASE AND CAMSHAFT BROKE. SUBMITTER SUSPECTS THAT ENGINE HAD BEEN OVERPRIMED PREVIOUSLY AND HAD CAUSED A HYDRAULIC LOCK ON THE CYLINDER BENDING THE CONNECTING ROD CAUSING IT TO FAIL SOMETIME LATER. #SDR AU960952Camshaft · failed(AUS) RH ENGINE CAMSHAFT FAILED AND COMPLETELY SEPARATED APPROXIMATELY 30MM (1.18IN) FROM THE FORWARD END CONTAINING THE EXPANSION PLUGSDR CA960227010Lifter · galled(CAN) #3 CYLINDER EXHAUST HYDRAULIC LIFTER GALLED (DISINTEGRATED).SDR AU960297Nut · cracked(AUS) ENGINE CYLINDER HOLD DOWN NUT CRACKEDSDR 96ZZZX3442Crankcase · failedDIPSTICK DEPARTED AIRCRAFT ON FINAL. MAINTENANCE UNCOWLED ENGINE TO PERFORM COMPRESSION TEST. ENGINE CRANKCASE HAD ERUPTED BETWEEN NR 1 AND NR 2 CYLINDER. BOTH MAGNETOS TORN FROM MOUNTING PADS NR 1 AND NR 2 CYLINDER ROD CAPS AND ROD BOLTS SHEARED FROM RODS SDR AU960145Bolt · unapproved part(AUS) NO2 CYLINDER CONNECTING ROD PNO 74502 BOLT INCORRECT PART - BOLT PNO 75060/1 FITTED - CORRECT PNO 74644 - INCORRECT BOLT IS LONGERTHAN THE CORRECT ONE - IPC IS UNCLEAR ON CORRECT PART NUMBER BOLTTO BE FITTED - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERROSDR 96ZZZX1400Crankcase · crackedDURING TROUBLESHOOTING OIL LEAK ON RT ENGINE, MECHANIC FOUND CASE CRACKED. LT CASE HALF JUST FORWARD OF THE OIL COOLER. ENGINE REMOVED FOR REPAIR.SDR AU960276Collar · wrong part(AUS) CRANKSHAFT FITTED WITH INORRECT OIL TRANSFER COLLAR - STANDARD COLLAR PNO 626739 FITTED TO M10 CRANKSHAFT RESULTING IN EXCESSIVECLEARANCE - LOG BOOK ENTRY ALSO DETAILED FITMENT OF STANDARD SIZEBEARINGS FITTED ALTHOUGH THE ACTUAL BEARINGS WERE M010 SIZE -SDR 96ZZZX856Crankshaft · pittedDURING 100-HOUR ENGINE INSPECTION FOR AIRCRAFT ANNUAL INSPECTION, LYC SB 505A WAS C/W AND THE CRANKSHAFT FOUND PITTED IN THE AREA NOTED IN SB 505A. ENGINE WAS REMOVED AND REPLACED WITH A LYC FACTORY OVERHAULED. AFTER REMOVAL OF THE CRANKSHAFT PLUG, THE INTERSDR AU960106Crankshaft · damaged(AUS) CRANKSHAFT COUNTERWEIGHT FERRULE HOLES ON WEBS CHIPPED DURING REMOVAL OF COUNTERWEIGHT BUSHESSDR 96ZZZX1089Lifter · failedENGINE POWER LOST IN-FLIGHT. AIRCRAFT LANDED WITHOUT INCIDENT. ENGINE REMOVED AND DISASSEMBLED. FIVE OF EIGHT LIFTER BODIES BROKEN AT THE CAM FOLLOWING FACE. SUBMITTER'S OPINION IS THAT ONLY ONE FAILURE OCCURRED. THE OTHER DAMAGE WAS DUE TO FOD FROM THE FSDR AU960159Bolt · failed(AUS) ENGINE CRANKCASE THROUGH BOLT SHEARED AT BASE OF NUT - BOLT GOES FROM NO2 CYLINDER LOWER FORWARD POSITION TO N03 CYLINDER LOWER AFT POSITION - CRANKCASE ALSO CRACKEDSDR CA960212031Rod · broken(CAN) A CONNECTING ROD BROKE AND DAMAGED THE CRANKCASE. THE PROPELLER WAS IN FEATHER, THEREFORE,THE ROD HIT THE INSIDE OF THE ENGINE A FEW MOMENTS BEFORE THE ENGINE STOPPED TURNING.SDR AU960157Crankcase · cracked(AUS) CRANKCASE CRACKED IN AREA OF NO4 CYLINDER - CRACK RADIATES FORWARD FROM THE FORWARD OIL FILTER STUD - CRACK LENGTH 135MM(5.314IN) - AIRCRAFT IS USED FOR TRAINING PURPOSESSDR 96ZZZX945Bolt · wrong partTHIS ENGINE WAS RECEIVED FOR A CASE CHANGE. THE CRANKSHAFT WAS A NON VAR. REMOVED THE 6 BOLTS THAT ATTACH THE CRANK GEAR AND BOLTS FOUND APROXIMATELY .25 INCH SHORTER THAN REQUIRED. SUBMITTER STATES WHOEVER ASSEMBLED THIS ENGINE PUT ROCKER SHAFT BOLTS, PN 5SDR 96ZZZX1105Crnakshaft · failedCRANKSHAFT BROKE AFT OF NR 2 MAIN JOURNAL AT OIL TRANSFER TUBE. PARTS SET TO TCM FOR DETERMINATION OF FAILURE. CAUSE WAS DETERMINED TO BE LOW THROUGH-BOLT TORQUE WHICH, IN TURN, CAUSED BEARING TO SHIFT AND CRANKSHAFT TO VIBRATE. AIRCRAFT HAD DEPARTED NORMALSDR 96ZZZX2559Lifter · damagedANNUAL INSPECTION - LARGE AMOUNT OF METAL FRAGMENTS IN OIL PRESSURE AND OIL SUCTION SCREENS. CYLINDERS REMOVED, 7 LIFTER BODIES NOT TURNING, ENGINE TEAR-DOWN REVEALED VERY LITTLE TAPER ON CAM LOBE TIPS EXCEPT NR 4 EXHAUST LUBE. IT HAD .001 INCH TAPER AND WASSDR 96ZZZX2558Camshaft · damagedANNUAL INSPECTION - LARGE AMOUNT OF METAL FRAGMENTS IN OIL PRESSURE AND OIL SUCTION SCREENS. CYLINDERS REMOVED, 7 LIFTER BODIES NOT TURNING, ENGINE TEAR-DOWN REVEALED VERY LITTLE TAPER ON CAM LOBE TIPS EXCEPT NR 4 EXHAUST LUBE. IT HAD .001 INCH TAPER AND WASSDR 96ZZZX1538Mount Stud · brokenPILOT COMPLAINED RT ENGINE WAS ROUGH RUNNING. FOUND NR 1 CYLINDER HELD ON BY ONLY AFT TWO THROUGH-BOLTS. ALL OTHER MOUNT STUDS WERE BROKEN. REMOVED CYLINDER AND THROUGH-BOLTS. PENETRATE CHECK OF CASE MOUNTING AREA REVEALED TWO CRACKS (1 O'CLOCK AND 7 O'CLOSDR 96ZZZX880Rod Bolt · not markedUPON INSPECTION OF NEW ROD BOLTS BEFORE INSTALLATION, DISCOVERED ONE OF EIGHT ROD BOLTS, SL78027, HAD NO HEAD MARKINGS IDENTIFYING THE PART.SDR CA960222009Breather · blocked(CAN) AFTER TAKEOFF, THE PILOT NOTICED THE OIL PRESSURE DROPPING ON THE RIGHT ENGINE. AS IT APPROACHED THE CAUTION ARC ON THE GAUGE, HE ELECTED TO SHUT DOWN ENGINE AND RETURN TO AIRPORT.HE THEN NOTICED LEFT ENGINE PRESSURE DROPPING AND DECLARED AN EMERGENCY. ESDR AU960095Stud · broken(AUS) NO4 CYLINDER REAR HOLD DOWN STUD BROKEN - SUSPECT STUD PREVIOUSLYCRACKEDSDR CA960212201Studs · broken(CAN) VISIBLE OIL LEAK IN FLIGHT. ENGINE SHUT DOWN. INSPECTION DISCLOSED THAT THE 24 CYLINDER HOLD DOWN STUDS FOR #6 CYLINDER HAD FAILED. APPROXIMATELY 50 PERCENT HAD BROKEN AND THE OTHER 50 PERCENT HAD PULLED OUT OF THE CRANKCASE.SDR CA960430201Crankshaft · failed(CAN) FOUND CRACK IN CRANKCASE AT #2 CYLINDER. #4 CONNECTING ROD DEPARTED CRANKSHAFT CAUSING INTERNAL ENGINE DAMAGE. DISASSEMBLY OF ENGINE FOUND ALL MAIN BEARING BABBITT OVERLAYS WERE SMEARED FROM OIL STARVATION. ALL CONNECTING ROD BEARINGS SMEARED FROM LUB DISDR AU960060Bolt · broken(AUS) NO3 CYLINDER CONNECTING ROD BOLT BROKE CAUSING OTHER BOLT TO BEND AND THEN BREAK - CONNECTING ROD WAS TORN FROM PISTON - MAJOR INTERNAL DAMAGE TO ENGINE AND CRANKCASESDR 96ZZZX851Crankcase · crackedUPON INSPECTION IAW AD 77-13-22 CRANKCASE CRACKS, CRACK FOUND AT NR 3 CYLINDER UPWARDS UNDER ENGINE DATA PLATE, LENGTH UNDETERMINED, BUT LEAKING OIL MAKES UNAIRWORTHY. ENGINE REMOVED FROM LEFT POSITION. ENT TT, 3,334.2 HOURS. ENG TSMOH, 916.3 HOURS. NOTE: SDR CA960515008Connecting Rod · fractured(CAN)IN CRUISE, #2 ENGINE STOPPED SUDDENLY. #2 CONNECTING ROD FAILURE DUE TO BEARING SHELLS ROTATING IN BIG END AND OVERHEATING.SDR 96ZZZX587Crankshaft · brokePERFORMED EMERGENCY LANDING ON FROZEN LAKE. DURING THE LANDING ROLL, THE RIGHT WING TIP STRUCK A SPRUCE TREE. THE AIRCRAFT RECEIVED DAMAGE TO THE RIGHT WING AND AILERON. THE ENGINE WAS REPLACED WITH THE AIRCRAFT ON THE FROZEN LAKE. THE EMERGENCY LANDING WASDR CA960202011Tappet Body · surface wear(CAN)REGROUND TAPPET BODIES WERE REUSED AT OVERHAUL AND SUFFERED PREMATURE WEAR AND WORE DOWN SEVERAL CAM LOBES. ENGINE PERFORMANCE WAS DETERIORATING, ALTHOUGH NO METAL PARTICLES WERE FOUND IN THE ENGINE.SDR AU960140Bearing · failed(AUS) LH ENGINE OIL FILTER METAL CONTAMINATION - SUSPECT FAILED MAIN BEARINGSDR 96ZZZX789Camshaft · crackedAT AN ANNUAL INSPECTION, THE GOVERNOR DRIVE COVER PLATE WAS REMOVED IN AN ATTEMPT TO STOP AN OIL LEAK. THIS EXPOSES THE FWD END OF THE CAM AND A CRACK WAS DISCOVERED EXTENDING FROM A SHARP CORNER IN THE KEYWAY. RECOMMEND A MODIFIED KEYWAY WITH A RADIUS IN THSDR 96ZZZX708Camshaft · wornDURING REMOVAL OF NR 1 AND NR 3 CYLINDERS FOR MAINTENANCE, INTERNAL INSPECTION OF THE CAMSHAFT AND TAPPET BODIES REVEALED EXCESSIVELY WORN CAMSHAFT LOBE AT THE NR 3 INTAKE POSITION. THE TAPPET BODY WHICH CONTACTS AND RIDES ON THE CAMSHAFT LOBE WAS HEAVILY SPASDR CA960131002Crankshaft · eccentric(CAN)THE CRANKSHAFT WAS INSPECTED IN ACCORDANCE WITH LYCOMING SB 505A AND FOUND PITTED. WHEN REPAIRS OF THE AFFECTED AREA WERE ATTEMPTED THE CENTRE BORE OF THE CRANKSHAFT WAS FOUND TO BE ECCENTRIC, WITH TH E #1 BEARING CIRCUMFERENCE OFFSET BY .085". THE CRANKSSDR AU960002Bearing · failed(AUS) ENGINE NO4 CONNECTING ROD BEARING FAILED IN AREA OF RELIEF FOR CONNECTING ROD BOLT SHANKSDR 99ZZZX309Seal · failedAPPROXIMATELY 1 INCH OF CRANKSHAFT SEAL PROTRUDED OUT OF CRANKCASE, OIL EXITED ENGINE. PILOT LANDED AIRPLANE IN BEAN FIELD. AIRPLANE GROUND LOOPED, PROP STRUCK GROUND, AND BENT NOSE WHEEL FORK.SDR CA960312201Crankshaft · broken(CAN)ENGINE TEARDOWN FOLLOWING SUDDEN FAILURE. CRANKSHAFT BROKEN IN THREE PIECES. THE BREAKS ARE THROUGH THE NUMBER 4 AND 6 CRANK CHEEKS. ALSO SEVERE DAMAGE TO SEVERAL CONRODS, COUNTERWEIGHTS AND INTERIOR OF CASE. CRANKSHAFT DID NOT SHOW ANY SIGNS OF LACK OF SDR 96ZZZX796Bolt · failedDURING THROTTLE MOVEMENT FORWARD TO FULL POWER, ENGINE ABRUPTYLY BEGAN TO RUN EXTREMELY ROUGH. NO COMPRESSION ON ONE CYLINDER. FOUND NR 3 CYLINDER CONNECTING ROD BROKEN NEAR CRANKSHAFT JOURNAL AREA. ONE CONNECTING ROD BOLT INTACT, THE OTHER BROKEN. EXTENSISDR CA951228003Bearing · failed(CAN)DURING FLIGHT THE OIL PRESSURE ON THE #2 ENGINE BEGAN TO DROP SO THE ENGINE WAS SHUTDOWN. POST FLIGHT INSPECTION OF THE ENGINE REVEALED THE OIL BREATHER LINE HAD FROZEN AND CREATED A PRESSURE BUILD THAT CAUSED ONE OF THE PUSH RODS SEAL TO BLOW OUT RESULTSDR 96ZZZM1129Intake Valve · stuck openFLT NR 9013 - RETURNED TO ANC DUE TO BACKFIRING ON TAKEOFF. MAINTENANCE REPLACED NR 3 CYLINDER ASSEMBLY ON NR 3 ENGINE DUE TO DAMAGED INTAKE VALVE AND PISTON. AIRCRAFT RETURNED TO SERVICE. (M)SDR 96ZZZX45Crankshaft · brokeCRANKSHAFT BROKE AT KEYWAY WHERE STARTER GEAR MOUNTS ON SHAFT.SDR 96ZZZX159Bolt · failedTHE NR 3 ROD CAP SEPARATED FROM ROD. ROD BOLTS WERE DAMAGED TOO BADLY TO BE IDENTIFIED FOR SURE, BUT SHOULD BE PART NUMBER LISTED. THESE BOLTS HAVE STRETCH TORQUE. SUBMITTER SUSPECTS IMPROPER TORQUING (EITHER TOO MUCH OR NOT ENOUGH) CAUSING BOLT FAILURE. ASDR 96ZZZX349Tappet · defectiveENGINE EXPERIENCED INTERMITTENT MISS. WHILE TROUBLESHOOTING, DISCOVERED NR 4 CYLINDER ROCKER TO VALVE CLEARANCE COULD NOT BE SET PROPERLY. ENGINE TORN DOWN AND FOUND TWO TAPPETS DEFECTIVE. SOCKET END WAS LOOSE AND TURNED FREELY IN END OF BODY. CAUSED EXCESSDR 96ZZZX2611Crankshaft · crackedDURING FLIGHT, A SLIGHT VIBRATION WAS NOTICED. A PRECAUTIONARY LANDING WAS MADE WITHOUT FURTHER INCIDENT. DURING AN INSPECTION TO DETERMINE CAUSE, NOTED THE PROPELLER COULD BE ROCKED FROM SIDE TO SIDE. SUBSEQUENT ENGINE TEAR-DOWN REVEALED A HORIZONTAL CRACKSDR 96ZZZX76Bolts · detachedUPON REMOVAL OF THE OIL SUMP TO REPLACE A LEAKING GASKET, FOUND 2 CASE HALF BOLTS AND ASSOCIATED HARDWARE (NUTS AND WASHERS) HAD COME OUT AND WERE LAYING IN THE SUMP. INSPECTION OF THE CASE HALF BOLT HOLES SHOWED NO SIGN OF FORGING ON THESE 2 BOLTS. IT IS THSDR 96ZZZX85Connecting Rod · brokeENGINE'S NR 6 ROD BROKE. PISTON PIN BOSS WAS GONE.SDR 96ZZZX63Crankcase · crackedA CRACK DEVELOPED 6 HOURS AFTER MAJOR OVERHAUL FROM LYCOMING. THE CRACK WAS 2.5 INCHES TO 3 INCHES LONG. SUBMITTER BELIEVES THE CRACK MUST HAVE BEEN THERE WHEN IT LEFT THE FACTORY. THIS ENGINE WAS A FACTORY REMANUFACTURE.SDR 96ZZZX1523Crankcase Nut · crackedPILOT REPORTED OIL PRESSURE FLUCTUATION DURING FLIGHT, BUT NEVER OUT OF GREEN ARC. UPON LANDING, NOTED ENGINE HAD HAD A MAJOR OIL LEAK. UPON INVESTIGATION, FOUND ONE OF THE THROUGH-BOLT NUTS HAD CRACKED, THIS WAS LOCATED ON THE FWD LOWER PART OF THE CASE. TSDR 95ZZZX6681Connect Rod · failedNR 2 CONNECTING ROD FAILED. THIS FAILURE CAUSED A HOLE IN CRANKCASE AND OIL BEING SPRAYED EVERYWHERE.
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