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.

SDR 95ZZZX3674Crankcase · crackedAIRCRAFT HAS SEVERAL OIL LEAKS ON RT ENGINE FINALLY RESULTING IN CRACKED CASE. SUSPECT THAT WHEN TEAR DOWN IS DONE, CRANK HAS COUNTERWEIGHT PROBLEM. THIS IS THE THIRD ENGINE THIS YEAR TO REJECT DUE TO CRANK PROBLEMS. SUBMITTER STATED MAYBE ENGINE OVERHAUL SJul 16, 1995 · N91WC · Beech E55SDR 95ZZZX3675Crankcase · bolt separatedDURING A SCHEDULED INSPECTION, THE LOWER FORWARD CRANKCASE THROUGH-BOLT ON NR 6 CYLINDER WAS FOUND COMPLETELY SEPARATED. FURTHER INSPECTION FOUND THE BOLT IMPROPERLY INSTALLED. THE BOLT FAILED IN THE O-RING GROOVE LOCATED IN THE MIDDLE PORTION OF THE BOLT. Jul 5, 1995 · N96NL · Beech 95B55SDR 95ZZZX4395Rod Bolt · broke1300 HOURS SINCE FACTORY OVERHAUL, ENGINE NR 5 CYLINDER CONNECTING ROD BOLT BROKE IN TWO PIECES.Jul 1, 1995SDR 95ZZZX5753Crankshaft · failedWHILE IN CRUISE FLIGHT, THE RIGHT ENGINE QUIT. THE PROP CONTINUED TO WINDMILL. THE PILOT FEATHERED THE PROP AND SECURED RIGHT ENGINE. AN EMERGENCY LANDING WAS COMPLETED. THE ENGINE WAS INSPECTED. THE CRANKCASE WAS CRACKED AND DISTORTED AROUND NR 6 CYLINDEJun 27, 1995 · N114MN · Gulstm 680FLSDR 95ZZZX3458Crankcase · bolts looseENGINE OVERHAULED 2-3-94. INSTALLED IN AIRCRAFT 4-1-94. AT 1,800 RPM CRUISE POWER, OIL PRESSURE AT 55 PSI, 190 DEGREES, OIL TEMPERATURE, WHICH IS ON THE TOP OF YELLOW ARC, BOTTOM OF GREEN ARC, AT HIGHER OIL TEMP, OIL PRESSURE WOULD DROP INTO YELLOW ARC. REMJun 16, 1995 · N252MA · Piper PA31PSDR 95ZZZX3462Crankcase · crackedWHILE ASSISTING THE OWNER/OPERATOR WITH A PREVENTIVE MAINTENANCE OPERATION, A CRACK WAS DISCOVERED ON THE FRONT SIDE OF THE NR 1 CYLINDER MOUNT PAD AREA. THE CRACK, ALTHOUGH CLEARLY VISIBLE, WAS CONFIRMED WITH DYE PENETRANT. THE CRACK DID NOT APPEAR TO BE LEJun 15, 1995 · N269JW · Piper PA36285SDR 95ZZZX3857Crankshaft · crackedCRANK MAGNETIC PARTICLE INSPECTION SHOWS FATIGUE CRACK IN RADIUS OF FLANGE/JOURNAL TRANSITION. CRACK ALSO INDICATED JUST FORWARD OF OIL SLINGER. AIRCRAFT HAS NO DAMAGE HISTORY. CRACKS ARE ORIENTED TO PROPELLER BLADE POSITION. PROPELLER (HARTZELL HCCWYK4) AJun 14, 1995SDR 95ZZZX3210Crankshaft · crackedAIRCRAFT MADE AN OFF-FIELD LANDING 200 YARDS SHORT OF THE AIRPORT. A COMPLETE LOSS OF OIL OCCURRED EXITING A HOLE IN THE CRANKCASE ADJACENT TO THE NR 2 CYLINDER. THE NR 1 AND NR 2 CYLINDER CAM FOLLOWER LIFTER BODY HEADS WERE SEPARATED ON THE INTAKE AND EXHAUMay 31, 1995 · N16354 · Piper PA32260SDR 95ZZZX2892Crankshaft · brokeENGINE FAILURE - LEVEL AT 12,000 FEET MSL CRUISE POWER. RAPID REDUCTION IN RPM, M.A.P., AND O.P., THEN PUT IN FEATHER. UPON LANDING, MECHANIC DETERMINED THAT NR 1 AND NR 2 CYLINDERS PISTONS DO NOT MOVE WHEN CRANKSHAFT/PROPELLER IS ROTATED. ALTHOUGH THE ENGIMay 30, 1995 · N7632Q · Cessna 340CESSNASDR 95ZZZX3006Bearing · failedMASTER ROD BEARING FAILED AND SEIZED TO CRANKSHAFT ROD JOURNAL ON GROUND AFTER START-UP. LACK OF PROPER LUBRICATION. SUSPECT CAUSED FROM NOT PROPERLY PRE-OILING DURING START-UP. SUBMITTER SUGGESTS THIS ENGINE IS EXTREMELY SENSITIVE TO OIL STARVATION AT STARMay 29, 1995SDR 95ZZZX2886Crankshaft · crackedEMERGENCY LANDING MADE DUE TO OIL LOSS AND PRESSURE LOSS. FOUND OIL LOSS AT APPROXIMATELY 1 QUART PER MINUTE AT 1,000 RPM. REMOVED PROPELLER AND FOUND FLANGE CRACKED 50 PERCENT AROUND CIRCUMFERENCE OF FLANGE. FAILURE OF CRANKSHAFT (LOSS OF PROPELLER) WAS VEMay 19, 1995 · N3653A · Beech 95B55SDR 95ZZZX4262Camshaft · failedFAILURE OF CAMSHAFT AT NR 3 AND NR 4 INTAKE LOBE. DESTROYED LIFTER BODIES, METAL IN ENGINE, ETC. TIME SINCE OVERHAUL 486.1 HOURS.May 18, 1995 · N1704U · Cessna 207SDR 95ZZZX3002Rod · failedENGINE CAME APART IN-FLIGHT. SUSPECT CONNECTING ROD OR COUNTERWEIGHT FAILURE. DATE 5-15-95.May 15, 1995 · N36934 · Cessna 414ASDR 95ZZZX2618Crankcase · crackedFOUND ENGINE CASE CRACKED FROM NR 2 CYLINDER RETAINING STUD HOLE (LOWER, FORWARD LARGE BOLT).May 15, 1995 · N901RG · Piper PA60601PSDR 96ZZZX4722Connect Rod · brokenROD BROKE AT CRANKSHAFT END OF ROD WHERE IT WIDENS FOR CRANKSHAFT. ROD SHOWS SIGNS OF FATIGUE. CYLINDER NR 5, ROD.May 9, 1995 · N6730Y · Piper PA23250SDR 95ZZZX2549Crankshaft · wornTHREE OF THE CONNECTING ROD JOURNALS AND TWO OF THE MAIN BEARING JOURNALS ARE OUT OF NEW LIMITS, .0002 (TWO-TENTHS OF ONE THOUSANDTH).May 9, 1995SDR 96ZZZX5266Bolt · crackedDURING ATTEMPT TO REMOVE CYLINDERS FROM ENGINE CASE, FOUND HOLD DOWN NUTS HAD BEEN OVERTORQUED AND HAD TO BE DRILLED TO BE REMOVED. FOUND MAIN JOURNAL WEB CRACKS IN CYLINDERS NR 4 AND NR 6. SUBMITTER BELIEVES HOLD DOWN NUTS OVERTORQUE TO BE A FACTOR IN CASE May 5, 1995 · N8999G · Cessna A188BSDR 96ZZZX5265Bolt · crackedDURING ATTEMPT TO REMOVE CYLINDERS FROM ENGINE CASE, FOUND HOLD DOWN NUTS HAD BEEN OVERTORQUED AND HAD TO BE DRILLED TO BE REMOVED. FOUND MAIN JOURNAL WEB CRACKS IN CYLINDERS NR 4 AND NR 6. SUBMITTER BELIEVES HOLD DOWN NUTS OVERTORQUE TO BE A FACTOR IN CASE May 5, 1995 · N8999G · Cessna A188BSDR 95ZZZX2681Crankcase · stud pulledWHILE RETORQUING CYLINDER HOLD-DOWN NUT, THE STUD PULLED OUT OF ITS THREADS IN THE OPPOSITE CASE HALF; THUS, THE CASE HAS TO BE SPLIT TO REPAIR THE THREADS. THIS IS A COMMON PROBLEM AND COULD BE PREVENTED BY THE INSTALLATION OF HELICOILS EACH TIME THE ENGINE May 1, 1995 · N63454 · Cessna 150JSDR 95ZZZX2436Tappet · failedTAPPET BODIES BROKE AT THE TOP WHERE THEY RIDE ON THE CAM. PARTS OF TAPPETS THEN LODGED BETWEEN THE CAM AND CASE CAUSING A CRACK IN THE CASE, ALSO, DAMAGE TO PISTONS, RODS, CRANK, AND CAM, RESULTING ENGINE FAILURE.Apr 30, 1995 · N4145H · Mooney M20JSDR 95ZZZX2373Connect Rods · out of balanceTHE CONNECTING ROD WEIGHTS ON THE LARGE END FROM THE LIGHTEST TO THE HEAVIEST WAS 57 GRAMS.Apr 29, 1995SDR 95ZZZX2270Crankshaft · out of balanceTHE CONNECTING ROD WEIGHTS ON THE LARGE END FROM THE LIGHTEST TO THE HEAVIEST WAS 57 GRAMS. THIS ENGINE HAS NEVER BEEN INSTALLED IN AN AIRCRAFT.Apr 29, 1995SDR 95ZZZX2379Crankshaft · corrodedREMOVED PROPELLER TO REPLACE CRANKSHAFT SEAL. FOUND CRANKSHAFT FLANGE SEVERELY CORRODED. REMOVED ENGINE FROM SERVICE FOR CRANKSHAFT REPLACEMENT. ENGINE HAD BEEN OVERHAULED BY AN 'IA' JUST 75 HOURS AND 3 YEARS PREVIOUS TO THIS DISCOVERY. SUBMITTER BELIEVES Apr 27, 1995 · N8330D · Beech J35SDR 95ZZZX2645Crankcase · crackedDURING INSPECTION, FOUND CASE CRACKED THROUGH NR 5 CYLINDER STUD AT 5 O'CLOCK POSITION, APPROXIMATELY 1 INCH IN LENGTH. CRACK WAS LEAKING OIL.Apr 26, 1995 · N6866L · Cessna 421CSDR 95ZZZX2644Crankcase · crackedDURING INSPECTION, FOUND CASE CRACKED THROUGH NR 5 CYLINDER STUD AT 5 O'CLOCK POSITION, APPROXIMATELY 1 INCH IN LENGTH. CRACK WAS LEAKING OIL.Apr 26, 1995 · N6866L · Cessna 421CSDR 95ZZZX6141Through-Bolt · brokenSUBJECT NR 1 CYLINDER UPPER THROUGH-BOLT FOUND BROKEN DURING PREFLIGHT. DETECTED AS THE MAJOR REMAINING PORTION AND HOLD-DOWN NUT FOUND BACKED OUT OF POSITION AND LODGED AGAINST CYL FINS. INSTALLED NEW BOLT, SPACER, AND NUT. TORQUED PER LYC SERVICE LETTER 1Apr 25, 1995 · N7112V · Mooney M20FSDR 95ZZZX2321Camshaft · lobes roundedPILOT COMPLAINED OF FOULED PLUGS. REMOVED NR 5 CYLINDER, FOUND CAMSHAFT LOBES ROUNDED AND FOLLOWERS SPALLED. ALSO, FOUND VERY VISIBLE WEAR OF THE PISTON PIN. FOUND SOME EVIDENCE THERE MAY HAVE BEEN SOME CORROSION ON PIN AND FOLLOWERS. HOWEVER, THE ENGINE WApr 20, 1995 · N7289R · Beech F33ASDR 95ZZZX3134Crankcase · crackedDURING INSPECTION, A .75 INCH CRACK WAS FOUND RADIATING UPWARD FROM THE AFT UPPER MOUNTING STUD FOR NR 4 CYLINDER. THE ENGINE HAD 732.9 HOURS SINCE BEING REBUILT BY THE FACTORY AND HAD BEEN IN SERVICE FOR 24 MONTHS.Apr 19, 1995 · N213CH · Beech 95B55SDR 95ZZZX2315Rod Bolt · mismanufacturedINSPECTION OF CONNECTING ROD BOLTS REVEALED ONE SIDE OF THE BOLT HEAD WAS FLAT ON THE EDGE INSTEAD OF ROUND. SUBMITTER SUGGESTS IN VIEW OF ALL THE PROBLEMS INVOLVING SUPERIOR PARTS. THIS IS SUSPECT.Apr 19, 1995SDR 95ZZZX2176Cylinder · stud shearedPILOT REPORTED OIL LEAK. UPON INSPECTION, 3 UPPER CYLINDER BASE STUDS FOUND SHEARED. REMOVED CYLINDER AND NOTICED CASE CRACKED AT LOWER RIGHT STUD.Apr 14, 1995 · N111AW · Beech 58SDR CA960129019Connecting Rod · broken(CAN)AIRCRAFT WAS IN CLIMB AT LOW ALTITUDE WHEN FAILURE OF #6 CYLINDER CONNECTING ROD CAUSED A SUDDEN AND COMPLETE STOPPAGE OF THE ENGINE. THE BROKEN CONNECTING ROD PIERCED THE CRANKCASE. THE AIRCRAFT CARRIED OUT A FORCED LANDING IN A FIELD.Apr 13, 1995 · Cessna 185BSDR 95ZZZX2661Crankshaft · wornCRANKSHAFT MAIN BEARING JOURNALS OUT OF LIMITS .0005 INCH (ONE-HALF THOUSANDS.) CRANKSHAFT CONNECTING ROD JOURNALS OUT OF LIMITS .0002 INCH. (TWO-TENTHS OF A THOUSANDS.)Apr 7, 1995SDR 95ZZZX2609Bolt · brokenENGINE WAS DISASSEMBLED AFTER ENGINE FAILURE. THE CRANKSHAFT BOLT THAT HOLDS FRONT AND REAR SECTIONS TOGETHER WAS FOUND BROKEN AT THE BASE OF THE THREADS, CRANKSHAFT REAR HALF WAS ALSO BROKEN. ABOUT ONE-HALF THE RADIUS OF SPLINES WERE BROKEN OUT.Apr 7, 1995 · N5627X · Ayres S2RNORMALSDR 95ZZZX2323Bracket · brokenSEVENTH STUD, CYLINDERS 2 AND 4: BRACKET BROKEN IN HALVES. ONE ONE-HALF FOUND LYING NEXT TO KEEL, OTHER ONE-HALF MISSING. (ANNUAL 100-HOUR INSPECTION.) REPLACED BRACKET AND NUT, PN 646312. SUSPECT CAUSE: PROGRESSIVE CRACK LEADING TO ULTIMATE FAILURE.Apr 1, 1995 · N4759M · Beech A36SDR 95ZZZX2194Lifter · mismfgZERO TIME ENGINE AFTER OVERHAUL WAS INSTALLED ON THIS AIRCRAFT AND ON FIRST REVENUE FLIGHT AFTER TEST FLIGHT, THE ENGINE BEGAN RUNNING ROUGH AND LOSING OIL PRESSURE. THE AIRCRAFT LANDED AND UPON INSPECTION OF ENGINE, THE NR 2 CYLINDER EXHAUST PUSH-ROD WAS FOUApr 1, 1995 · N64PB · Cessna 402CSDR 95ZZZX1891Crankshaft · ctweight failedDURING CRUISE, LT ENGINE LOST POWER, OIL PRESSURE OKAY. ENGINE SHUT DOWN AND SAFE LANDING MADE. FOUND BOLTS BROKE ON NR 3 CYCLINDER CONNECTING ROD. ALSO, NR 4 COUNTERWEIGHT BROKE LOOSE FROM CRANKSHAFT DUE TO FAILURE OF ATTACH POINT ON CRANKSHAFT. NO PRIOR Mar 30, 1995 · N18MC · Piper PA31PSDR 95ZZZX1889Pan · crackedAIRCRAFT HAD A GROUND STRIKE AND SUDDEN STOPPAGE. ENGINE AND PROP DISASSEMBLED, INSPECTED, AND REASSEMBLED. AFTER 19 HOURS, OIL LEAK DEVELOPED FROM CRACK IN PAN. CRACK LOCATED 11 INCHES FROM FRONT OF PAN. BELIEVE THIS WAS CAUSED FROM PAN STRIKING ENGINE MOMar 29, 1995 · N6222A · Cessna 182SDR 95ZZZX1878Crankcase · defectiveIN COMPLYING WITH SB M92-09 DURING ASSEMBLY USING NEW 12-POINT NUT PN 652541 AND TORQUE OF 790-810 INCHES/POUNDS, ENGINE FAILED TO TURN WHEN FULL TORQUE WAS REACHED. UPON DISASSEMBLY, MAIN BEARING BORES WERE FOUND OUT OF ROUND. SUSPECT 'SOFT' CRANKCASE.Mar 28, 1995SDR 95ZZZX1799Cylinder · base nut failedON TAKEOFF, RT ENGINE FIRE LIGHT, LOSS OF POWER. PILOT SHUT DOWN, RETURNED TO AIRPORT. FOUND NR 4 CYLINDER HELD ON BY ONE BASE NUT. EXAMINED CYLINDER/PISTON, FOUND NO DISCREPANCIES. SUSPECT NUTS OVER/UNDERTORQUED.Mar 25, 1995 · N6902T · Piper PA60602PSDR 95ZZZX1695Tappet · failedAFTER TAKEOFF, TURN OUT OF TRAFFIC, UNDER FULL POWER, RPM ROLLED BACK TO 1900. SEVERE VIBRATION. CONTINUED TURN TO DOWNWIND; BASE FOR EMERGENCY LANDING. ENGINE SHUT DOWN.Mar 22, 1995 · N3216E · Cessna 172NSDR 95ZZZX1604Crankcase · crackedCRANKCASES FOUND CRACKED AND FRETTING AROUND MAIN BEARING SUPPORT STRUCTURE IN THE AREA OF THE CRACKED CRANKSHAFTS.Mar 21, 1995 · N4529P · Piper PA23250SDR 95ZZZX1603Crankcase · crackedCRANKCASES FOUND CRACKED AND FRETTING AROUND MAIN BEARING SUPPORT STRUCTURE IN THE AREA OF THE CRACKED CRANKSHAFTS.Mar 21, 1995 · N4529P · Piper PA23250SDR 95ZZZX1601Connect Rod · failedTHIS ENGINE, CONVERTED FROM A TSIO-360-GB, HAD NR 3 AND NR 4 CONNECTING RODS FAIL AT THE SAME TIME KNOCKING A HOLE IN THE UPPER CASE AREA OF ABOUT 8 INCHES DIAMETER. TELEDYNE-CONTINENTAL SB M86-11 R1 PERTAINS TO THIS SUB JECT.Mar 21, 1995 · N2443M · Piper PA28R201TSDR 96ZZZX4786Crankcase · crackedDURING TROUBLESHOOTING TO DETERMINE ORIGIN OF AN OIL LEAK, FOUND CASE CRACKED ON BOTH VALVES AT NR 3 BEARING WEB. UPON TEAR DOWN, CASE HALVES WERE REJECTED DUE TO FAILING HARDNESS TEST. CRACKS WERE IN AREA OF A PREVIOUS REPAIR. CAUSE OF FAILURE UNKNOWN.Mar 13, 1995 · N321GS · Piper PA34200TSDR 95ZZZX1430Plunger Assy · looseDURING COURSE OF TROUBLESHOOTING A ROUGH RUNNING ENGINE, THE HYDRAULIC PLUNGER ASSEMBLIES WERE REMOVED FROM THE TAPPETS. THE 'STEMS' OF 7 OF THE 8 UNITS WERE LOOSE AND WOULD SPIN IN THE BODY OF THE PLUNGER ASSEMBLY. NO CLUE WAS FOUND TO INDICATE WHAT MADE THMar 3, 1995 · N3975K · Piper PA28140SDR 95ZZZX1253Crankshaft · brokenENGINE DISASSEMBLY REVEALED THE CRANKSHAFT HAD FAILED THROUGH THE NR 3 CRANK CHEEK. THE FRACTURE FACE WAS EXAMINED BY THE TCM METALLURGIST WHO CONFORMED THE FAILURE WAS IN BENDING OVERLAOD. THE NR 1 AND NR 2 MAIN BEARINGS WERE HAMMERED OUT TO EXTRUDE THE BEAMar 1, 1995 · N1693W · Beech V35BSDR 95ZZZX1209Connect Rod · failedAFTER TAKEOFF, RIGHT ENGINE BECAME VERY ROUGH. ENGINE WAS FEATHERED, AIRCRAFT RETURNED TO AIRPORT AND LANDED. INSPECTION FOUND CONNECTING ROD CAPS HAD SEPARATED FROM NR 1, NR 2, AND NR 3 RODS. CONNECTING ROD PENETRATED BOTH BOTTOM AND TOP OF ENGINE CASE.Feb 17, 1995 · N3581C · Piper PA31350SDR 95ZZZX2664Crankshaft · wornENGINE WAS CONTAMINATED WITH METAL. THE CRANKSHAFT HAD TO BE TURNED UNDERSIZE TO REPAIR. FACTORY TEST RUN TIME ONLY.Feb 16, 1995SDR 96ZZZX5031Crankshaft · corrodedDURING OVERHAUL INSPECTION OF CRACKSHAFT, SOME CORROSION PITTING WAS NOTED ON OUTSIDE DIAMETER OF SEVERAL BEARING JOURNALS. INSPECTION OF FRONT MAIN INSIDE DIAMETER REVEALED AN AREA OF APROXIMATELY 20 CORROSION PITS. PITS WERE APPROXIMATELY .010 INCH DEEP ANFeb 7, 1995 · N7698S · Bbavia 8KCABSDR 95ZZZX765Gear · failedENGINE LOST POWER AT 80 KNOTS. ENGINE WAS REMOVED AND CRANK GEAR FOUND BROKEN AND BOLT STRIPPED.Feb 7, 1995 · N55682 · Piper PA32300
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