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 96ZZZX5593Valve · stretchedDURING SPRAY APPLICATION, CYLINDER HOLD-DOWN STUDS SHEARED 8 OF 10. THE CYLINDER CAME LOOSE RESULTING IN LOSS OF POWER AND FORCED PRECAUTIONARY LANDING. NO RECOMMENDATION.SDR 96ZZZX3888Bearing · failedAFTER NORMAL TEST CELL RUN, ENGINE OIL WAS DRAINED AND THE OIL FILTER AND SUCTION SCREEN WAS INSPECTED AND A MASSIVE AMOUNT OF ALUMINUM WAS FOUND. UPON DISASSEMBLY, FOUND THE FRONT BEARING HAD FAILED AT THE NR 2 JOURNAL. THE BEARING HAD SMEARED AND TRANSFERRSDR 96ZZZX3869Crankcase · crackedTHE INSPECTION FOUND CRANKCASE HAS A SMALL .3750 INCH CRACK NEXT TO THE UPPER BOLT JUST FORWARD OF CYLINDER NR 5. THIS IS CONSIDERED A NON-CRITICAL AREA PER SB M90-17.SDR 96ZZZX4059Cam Follower · brokenCAM FOLLOWERS BROKEN ON NR 1 CYLINDER EXHAUST NR 3, EXHAUST AND INTAKE, NR 5 CYLINDER-INTAKE. REST OF CAM FOLLOWERS PITTED OR SPALLED. NR 2 CYLINDER DROPPED THE EXHAUST VALVE. OIL SUMP REMOVED FOR INSPECTION AND CLEANING. FOUND PIECES OF CAM FOLLOWERS IN SSDR 96ZZZX3931Crankcase · crackedPILOT REPORTED AN OIL LEAK CLIMBING FROM THE RIGHT SIDE OF THE LEFT ENGINE. AFTER INSPECTING THIS AREA OF THE ENGINE, THE ALTERNATOR BASE GASKET APPEARED TO BE RIPPED AND A PORTION OF IT STICKING OUT OF THE FLANGE AREA. UPON REMOVAL OF THE ALTERNATOR AND BASSDR CA960716005Crackcase · cracked(CAN) CRACK DETECTED VISUALLY ON CRANKCASE AT UPPER LEFT HAND FORWARD OF #2 CYLINDER MOUNT STUD. NO OIL LEAK WAS EVIDENT, HOWEVER THE CRACK APPEARED TO ORIGINATE IN THE AREA OF A PREVIOUS WELDED REPAIR.SDR AU961061Crankshaft · worn(AUS) CRANKSHAFT MAIN BEARING JOURNALS 0.0508MM (0.002IN) UNDER MINIMUMALLOWABLE LIMITS - CONNECTING ROD JOURNALS 0.0127MM (0.0005IN) UNDER MINIMUM ALLOWABLE LIMITS - CRANKCASE MAIN TUNNELS ALSO OUT OF LIMITSSDR CA960729010Main Bearings · spun(CAN) ENGINE WAS UNABLE TO MAINTAIN MINIMUM OIL PRESSURE IN CRUISE AND PROP CONTROL WAS DIFFICULT. ENGINE WAS DISMANTLED FOR INSPECTION WHICH REVEALED #2 & #3 MAINS HAD SPUN IN THE CRANKCASE. CRANKCASE ASSEMBLY OVERHAULED AND ENGINE WAS RETURNED TO SERVICE.SDR 97ZZZX5036Stud · defectiveNR 1 CYLINDER STUD DEFECTIVE. THIS IS A COMMON PROBLEM TO THESE ENGINES. THE BASIC PROBLEM HERE IS HOW THE AD READS. SUBMITTER BELIEVES THERE IS A NEED TO REVISE THE WORDING.SDR 96ZZZX3694Case · crackedLEFT CASE CRACKED BELOW NR 2 CYLINDER BASE. CRACK WAS ABOUT 2.5 INCHES LONG.SDR AU960946Stud · sheared(AUS) NO5 CYLINDER BASE STUD (1OFF) SHEARED OFF - STUD WAS FOUND IN BOTTOM COWLSDR AU960944Crankshaft · cracked(AUS) CRANKSHAFT CRACKED INTERNALLY - CRACK LENGTH APPROXIMATELY 50MM (2IN) - THE CRACK WAS LOCATED AT THE BASE OF A CORROSION PIT AND WAS FOUND AFTER THE INTERNAL DIAMETER WAS HONED TO REMOVE THE PIT - FOUND DURING INTERNAL CORROSION INSPECTION OF A CRANKSHSDR 96ZZZX4958Crankshaft · flange failedPROPELLER AND CRANKSHAFT PROPELLER FLANGE SEPARATED FROM ENGINE.SDR 96ZZZX3763Crankcase · crackedRIGHT CRANKCASE CRACKED BELOW NR 1 CYLINDER BASE. CRACK WAS APPROXIMATELY 6 INCHES LONG. CASE WAS NOT REPAIRABLE.SDR 97ZZZX2592Crankshaft · failureIN-FLIGHT FAILURE OF CRANKSHAFT RESULTED IN FORCED LANDING. AIRCRAFT WAS DESTROYED. PILOT HAD REPORTED INCREASE IN OIL TEMPERATURE (NOT ABOVE RED LINE, BUT HIGHER THAN NORMAL). NO OTHER SYMPTOMS REPORTED, AND MAINTENANCE COULD NOT IDENTIFY A PROBLEM. ENGINSDR 96ZZZX4315Connectiing Rod · bolt failedENGINE FAILED IN-FLIGHT WITH LOUD BANG. AIRPLANE FORCE LANDED ON ROAD. INSPECTION REVEALED NR 1 CYLINDER ROD HAD COME LOOSE FROM CRANK AND PUNCHED HOLE IN BOTTOM OF CASE. INSPECTION OF ENGINE FOUND CONNECTING ROD BOLTS, P/N 78027, ON NR 1 AND NR 4 CYLINDERSSDR AU960967Collar · worn(AUS) ENGINE LOW OIL PRESSURE - SUSPECT CRANKSHAFT TRANSFER COLLAR OR MAIN BEARINGS WORNSDR 96ZZZX3995Lockwasher · failedDURING TROUBLESHOOTING, METAL IN OIL SCREEN PROBLEM, A TANG WAS FOUND IN SUMP SUCTION SCREEN, BUT WAS UNABLE TO POSITIVELY IDENTIFY THE SOURCE OF METAL. TENTATIVELY IDENTIFIED AND HELICOPTER RETURNED TO SERVICE. 6.5 HOURS LATER, THE ENGINE QUIT SUDDENLY ON TSDR AU961093Camshaft · worn(AUS) CAMSHAFT EXHAUST VALVE LOBES AND ASSOCIATED TAPPETS PNO 72877 WORN - WEAR WAS BETWEEN 4.572MM AND 5.08MM (0.180IN AND 0.200IN)SDR CA960827006Rod Pin · broken locks(CAN) AFTER ENGINE WARM-UP PRIOR TO COMPRESSION CHECK, WITH THE FRONT SPARK PLUGS REMOVED, THE PROP WAS SPUN TO LOCATE TOP DEAD CENTRE (TDC) ON #1 CYLINDER. THE PROP SUDDENLY STOPPED. REMOVAL OF THE #1 CYLINDER REVEALED THE CONNECTING ROD PIN HAD SLID OUT ALLOSDR 96ZZZX5243Crankcase · brokenNOTED OIL LEAK ON LT SIDE OF OIL SUMP. FOUND THE CRANKCASE HAD MISSING PIECES AT LT REAR OIL SUMP MOUNTING STUD. ENGINE WAS CONVERTED TO IO-360 APPROXIMATELY 100 HOURS PREVIOUSLY. A NEW OIL SUMP WAS INSTALLED AT THAT TIME. SUSPECT OIL SUMP TO CASE BOLTS WSDR AU960905Crankshaft · faulty(AUS) CRANKSHAFT HAD 0.9144MM (0.036IN) RUNOUT AT PROPELLER FLANGE - CAMSHAFT LOBES (2OFF0 BADLY WORN - LIFTER BODIES BADLY PITTED -FOUND DURING ENGINE BULK STRIPSDR 96ZZZX3798Crankcase · crackedENGINE RUN ROUGH DURING FLIGHT. NR 1 CYLINDER LOOSE, CRANKCASE FOUND CRACKED BETWEEN BOTTOM STUD HOLES.SDR 96ZZZX3427Seal · looseOUTER CIRCUMFERENCE OF SEAL IS NOT A TIGHT FIT TO THE CRANKCASE. AFTER SEAL IS INSTALLED, SEAL IS ABLE TO ROTATE. NO SEALANT IS RECOMMENDED IN THE OVERHAUL OR SERVICE MANUALS, P/N LW13792 AND SL 13792 SEALS.SDR CA960704004Front Cam · damaged lobe(CAN) ENGINE RUNNING ROUGH AND BACKFIRING ON INITIAL STARTUP. INVESTIGATION REVEALED FRONT CAM MISSING PART OF A LOBE. FRONT CAM REPLACED AND AIRCRAFT TEST FLOWN SERVICEABLE.SDR CA960703016Front Cam · damaged cam(CAN) ENGINE RUNNING ROUGH AND BACKFIRING ON INITIAL START-UP. INVESTIGATION REVEALED FRONT CAM MISSING PART OF A LOBE. FRONT CAM REPLACED AND AIRCRAFT TEST FLOWN SATISFACTORILY.SDR AU961088Crankcase · cracked(AUS) ENGINE CRANKCASE CRACKED FROM NO6 CYLINDER FORWARD UPPER CYLINDERFLANGE STUD TO NO6 CYLINDER INLET VALVE TAPPER GUIDESDR 96ZZZX3529Crankcase · crackedDURING 100-HOUR INSPECTION, THE CRANKCASE WAS FOUND CRACKED (2 INCHES). THIS WAS THE SAME CRACK THAT WAS FOUND 2 YEARS AGO WHEN THE ENGINE HAD 1,500 HOURS TSMO. THE CASE HALVES WERE REPLACED AND NOW 1,000 HOURS LATER, THE SIMILAR CRACK HAS RE-APPEARED. SUSPSDR AU960929Crankcase · cracked(AUS) ENGINE CRANKCASE CRACKED IN THE LH FORWARD SECTION - CRACK LENGTH APPROXIMATELY 32MM (1.25IN) - CRANKCASE HAD BEEN WELD REPAIRED IN THIS AREA AT LAST OVERHAUL - SUSPECT INCORRECT HEAT TREATMENT FOLLOWING WELD REPAIRSDR AU960925Bearing · seized(AUS) ENGINE NO1 MAIN BEARING SEIZED TO CRANKSHAFT DURING START - ENGINE HAD DONE 17.5 HOURS SINCE A TOP OVERHAUL WAS CARRIED OUTSDR AU960858Connecting Rod · failed(AUS) NO3 CYLINDER CONNECTING ROD FAILED IN AREA APPROXIMATELY HALF WAY BETWEEN THE BIG END AND THE GUDGEON PIN BUSHING - FAILURE INVESTIGATION FOUND EVIDENCE OF A PRE-EXISTING FLAW IN THE PISTON PIN BEARING HOUSING WHICH WAS HEAVILY OXIDISEDSDR 96ZZZX3338Crankcase · crackedCRANKCASE FOUND CRACKED, LEFT SIDE, ABOVE NR 4 CYLINDER. THIS IS THE 'HEAVY' STYLE CRANKCASE AND IS NOT COVERED BY AD 77-13-22. SUBMITTER RECOMMENDS INCLUDING THIS SERIES CRANKCASE IN AD 77-13-22.SDR 96ZZZX3331Lifter · chippedWHILE CLEANING-INSPECTING LIFTER FOR REINSTALLATION, FOUND CAMSHAFT FACE OF LIFTER CHIPPED.SDR CA960619031Counterweight Pl · broken(CAN) THE ENGINE DEVELOPED A SLIGHT VIBRATION INFLIGHT. THE ENGINE OIL PRESSURE & VACUUM SUCTION DROPPED TO ZERO. THE STANDBY VACUUM RESTORED SUCTION. THE ENGINE OPERATING TEMPERATURE INCREASED BUT STAYED IN THE GREEN. THE MANIFOLD PRESSURE WAS NORMAL. POST FLSDR 96ZZZX3380Bolt · failedTHIS THROUGH-BOLT HOLDS CYLINDERS NR 3 AND NR 2 TOGETHER AT TOP OF CLYLINDER, ALSO, BOLT CLAMPS THE CASE TOGETHER. THE THREADS ON THE STUD AND NUT FAILED CAUSING OIL TO LEAK.SDR AU960906Gear · damaged(AUS) CRANKCASE CRACKED - CAMSHAFT GEAR AND MAGNETO IDLER GEAR DAMAGED - MAGNETO IDLER GEAR SHAFT BENT - MAGNETO DRIVE GEARS BADLYSPALLED - FOUND DURING ENGINE BULK STRIP FOLLOWING DISCOVERY OF SEVERAL BROKEN CYLINDER BASE STUDS - PERSONNEL/MAINTENANCE ERRORSDR AU960825Crankshaft · broken(AUS) ENGINE CRANKSHAFT BROKEN - CRANKCASE BROKEN - CAMSHAFT DAMAGED - NO1 AND NO2 CYLINDERS DAMAGED - CONNECTING RODS BENT - SEE MDR 96/0797 FOR FURTHER INFORMATIONSDR CA960626002Crankcase · cracked(CAN) WHILE REMOVING THE #2 ENGINE TO FACILITATE REPLACEMENT OF A CRACKED ENGINE MOUNT, A 6" CRACK WAS FOUND ON THE CRANKCASE, JUST AFT OF THE PROP UNDER THE FORWARD BAFFLE. THE ENGINE WAS REPLACED.SDR AU960797Crankshaft · failed(AUS) ENGINE CRANKSHAFT FAILED THROUGH WEBS OF NO1 AND NO2 BIG END JOURNALS - NO1 AND NO2 CYLINDERS AND CONNECTING RODS DAMAGEDSDR CA960604005Bearing · scored(CAN)PROP WENT INTO FEATHER AT ENGINE IDLE. PROP CONTROL OIL LEAK TEST PERFORMED PER LYCOMING S.L. 1462, NOT WITHIN LIMITS. NON FERROUS METAL IN FILTERS. ENGINE REPLACED. TEARDOWN REVEALED FRONT CRANKSHAFT BEARING BADLY WORN DUE TO AN APPARENT OUT OF ROUND CONSDR 96ZZZX3426Seal · looseOUTER CIRCUMFERENCE OF SEAL IS NOT A TIGHT FIT TO THE CRANKCASE. AFTER SEAL IS INSTALLED, SEAL IS ABLE TO ROTATE. NO SEALANT IS RECOMMENDED IN THE OVERHAUL OR SERVICE MANUALS, PN 13792 AND SL 13792 SEALS.SDR 96ZZZX3444Crankcase · crackedENGINE CRANKCASE WAS FOUND CRACKED FROM THE CRANKCASE THROUGH-BOLT AT CYLINDER NR 2. THE CASE WAS REPLACED 4-9-95. THE ENGINE CURRENTLY HAS 1,257 HOURS TSO.SDR AU960736Crankcase · cracked(AUS) CRANKCASE CRACKED IN AREA OF NO1 BEARING - CRACK ALSO IN CRANKCASE TOP FLANGE AT 7TH HOLE FROM THE FRONT - NO1 BEARINGSPINNING AND BREAKING UP - FRETTING OF CRANKCASE MATING FACES INDICATES EXCESSIVE MOVEMENT POSSIBLY DUE TO INSUFFICIENT THROUGHBOLT TENSDR AU961015Bolt · broken(AUS) ENGINE NO5 CYLINDER HOLDDOWN NUTS MISSING AND THROUGH BOLTS BROKEN - CRANKCASE CRACKEDSDR CA960606002Split Pin · detached(CAN)ON ANNUAL INSPECTION, ONE SPLIT PIN FOUND IN THE SUCTION OIL SCREEN. OIL PAN REMOVED FOR INTERNAL INSPECTION. #5 CONROD BEARING CAP MISSING ONE COTTER PIN, REPLACED.SDR CA960611002Conrod · broken(CAN)IN CRUISE, LEFT ENGINE LOST POWER AND VIBRATED, SHUTDOWN. HOLE APPROXIMATELY 6 INCHES DIAMETER IN CRANKCASE. CONROD FAILED.SDR AU960679Bearing · wrong part(AUS) CRANKSHAFT COUNTERWEIGHT ROLLER BEARING PNO 630261-43 INCORRECT PART - CORRECT PART NUMBER FITTED SHOULD HAVE BEEN PNO 630261-44 - COUNTERWEIGHT RETAINING WASHER WORN INTO COUNTERWEIGHT - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERRORSDR 96ZZZX4072Crankcase · crackedLEFT CRANKCASE CRACKED BELOW NR 2 CYLINDER, FORWARD LOWER BASE STUD. CRACK WAS APPROXIMATELY 2 INCHES LONG. CASE WAS REPAIRED.SDR 96ZZZX2857Tappet · spalledENGINE DISASSEMBLED. CAMSHAFT LOBE AND HYDRAULIC BODY TAPPET FURNISHED BY SUPERIOR AIR PARTS WERE REMOVED. THE CAM LOBE WAS WORN BELOW TOLERANCE, THE HYD BODY WAS BADLY PITTED. THE CAMSHAFT AND BODY HAD BEEN INSTALLED ABOUT 30 MONTHS AGO AND HAD A TOTAL OF SDR CA960510103Crankshaft · broken(CAN)IN CRUISE, ENGINE RUNNING ROUGH AND LOSING POWER. ENGINE SHUTDOWN. MAINTENANCE FOUND THAT TURNING PROP BY HAND RESULTED IN NO ROTATION ON 3,4,5 & 6 CYLINDERS INDICATING A BROKEN CRANKSHAFT. ENGINE ROUTED TO SHOP FOR FURTHER INVESTIGATION.
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