JASC 8530

Service difficulty reports · 4,340

Reports filed under 8530 · Reciprocating Engine Cylinder 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 = '8530'
  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 2026FA0000822Cylinder · crackedDISCOVERED CRACKED CYLINDER #3 FOLLOWING A ROUTINE INSPECTION FOR SB25-04.Oct 2, 2026 · N1096W · Cirrus SR22TSDR 8HBR20261010088Cylinder Head · rotatedDURING A ROUTINE ANNUAL INSPECTION CYLINDER #3 HAD OIL LEAKING AND A DAMAGED SEAL ON THE EXHAUST PUSH ROD TUBE. WHILE PERFORMING THE WORK TO REPLACE THE SEAL, THE TECHNICIAN FOUND IT DIFFICULT TO GET THE TUBE SEATED PROPERLY. UPON FURTHER INSPECTION IT APPEARESep 30, 2026 · N46889 · Cessna 152SDR 2026FA0000796Lock Tab · misinstalledREMOVED THE #2 AND #4 CYLINDER INTAKE AND EXHAUST ROCKER COVERS FOR ROUTINE GASKET REPLACEMENT. UPON INSPECTION OF THE VALVE ASSEMBLY, I FOUND THE LOCKING TAB WASHER P/N: 501868, FOR THE CYLINDER ROCKER ARM SHAFT HOLD DOWN BOLTS TO NOT BE BENT INTO THE LOCKINGSep 30, 2026 · N621K · Cirrus SR22SDR VT9R2026092400782Pushrod · galledTHIS IS THE SECOND TIME WE HAVE HAD THIS PROBLEM SINCE WE RECEIVED IT NEW FROM THE ROBINSON HELICOPTER FACTORY ON 7/30/2026. DURING ITS FIRST 100HR INSPECTION WHILE PREFORMING LYCOMING SB-388, ALL 8 PUSH RODS AND ALL 8 ROCKER ARMS WERE FOUND TO HAVE THE SAME ASep 24, 2026 · N925KM · Robsin R22BETAIISDR 2026FA0000832Clamp · brokenAIRCRAFT DEPARTED KHND. A FEW MINUTES AFTER REACHING FL 190 AND SETTING CRUISE POWER, THE LEFT ENGINE BEGAN TO LOSE POWER. THE LEFT ENGINE MANIFOLD PRESSURE BEGAN DECLINING SO PILOT DECLARED AN EMERGENCY AND IMMEDIATELY DIVERTED TO KSGU. THE INITIAL LOSS IN POSep 13, 2026 · N340LL · Cessna 340ASDR HYIA20260917002Cylinder · crackedDURING NORMAL INSPECTION THE #1 CYLINDER ON THE RIGHT ENGINE WAS FOUND TO BE CRACKED. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.Sep 10, 2026 · N133CA · Tecnam P2012SDR 2026FA0000672Cylinder · separatedCYLINDER NR 3 HEAD SEPARATED FROM BARREL. THE OPERATOR HAD PREVIOUSLY INSPECTED AN OIL LEAK ON OR AROUND CYLINDER NR 3. PRESENTATION OF OIL LEAK AND SEPARATION OF HEAD FROM BARREL IS THE SAME AS DESCRIBED IN AD 86-13-04 R3. THIS CYLINDER PN STAMPED ON THE FLANAug 27, 2026 · N9772H · Cessna 182RSDR V79R2026090600629Pushrod · scoredTHIS IS THE FOURTH FACTORY NEW AIRCRAFT WE HAVE RECEIVED IN A ROW FROM ROBINSON HELICOPTER CO WITH THIS ISSUE. ALL PUSHRODS AND ROCKER ARMS WERE FOUND TO BE SORED AT THE MATING SURFACE. PARTS HAVE SINCE BEEN SENT TO RHC AND WE ARE WAITING FOR REPLACEMENT PARTSAug 5, 2026 · N728TK · Robsin R22BETASDR V79R2026090600628Pushrod · scoredTHIS HELICOPTER IS THE THIRD FACTORY NEW AIRCRAFT WE RECEIVED FROM THE MANUFACTURER WITH THIS ISSUE. ALL THE ROCKER ARMS AND PUSH ROD CAPS WERE FOUND TO BE SCORED DURING A PRECAUTIONARY INSPECTION. BELOW IS WHAT WAS ENTERED INTO THE AIRCRAFT LOGBOOKS. "REMOVEDJul 30, 2026 · N925KM · Robsin R22BETASDR 2026FA0000519Cylinder · crackedPILOT REPORTED LOUD NOISE FROM ENGINE, SIGNIFICANT POWER LOSS, AND LOUD VIBRATIONS. PILOT LANDED AT A NEARBY AIRPORT WHERE MANTIENCE DISCOVERED A LARGE CRACK IN CYLINDER #2(HEAD SEPERATING FROM THE BARREL).Jun 15, 2026 · N5251Z · Cessna 172SSDR 2026FA0000508Cylinder · separatedON 6/9/26 ABOUT 1:00PM AKST, THE SUPER DC3 TAIL NUMBER N28TN WAS RETURNING TO ANCHORAGE WHEN THE #2 ENGINE FAILED. UPON INSPECTION THE #9 CYLINDER CRACKED AROUND THE BASE, SEPARATED FROM THE ENGINE AND LODGED IN THE COWLING. THE FLIGHT CREW SHUT THE ENGINE DOWJun 10, 2026 · N28TN · Doug R4D8SDR 2026FA0000404Cylinder Head · separatedSEPARATION OF CYLINDER HEAD, EXHAUST SIDE FROM NR 5 CYLINDER DURING CRUISE/LEVEL FLIGHT. APPROXIMATELY 30 MINUTES INTO FLIGHT.May 18, 2026 · N444AN · Cirrus SR22TSDR 2026FA0000422Intake Valve · brokenDURING ENROUTE CRUISE FLIGHT NR 4 CYLINDER INTAKE VALVE STEM FAILED ALLOWING VALVE TO ENTER CYLINDER, DAMAGE PISTON AND SPARK PLUGS AND SUBSEQUENTLY SENT PIECES OF VALVE INTO NR 1 CYLINDER SMASHING SPARK PLUGS, PISTON AND RENDERING A VERY ROUGH ENGINE RUNNING May 11, 2026 · N62BV · Beech C24RSDR 2026FA0000347Thrust Button · faultyDURING MAJOR OVERHAUL INSTALLED SUPERIOR ROCKER SHAFT THRUST BUTTONS P/N SL12893.INFORMATION THAT WE RECEIVED STATED THAT FAULTY THRUST BUTTONS WILL FLOAT IN WATER AND GOOD PARTS WILL SINK. WE PERFORMED THIS TEST ON EVERY LOT NUMBER IN OUR INVENTORY AND FOUND May 9, 2026SDR 2026FA0000346Thrust Button · faultedDURING MAJOR OVERHAUL INSTALLED SUPERIOR ROCKER SHAFT THRUST BUTTONS P/N SL12893.INFORMATION THAT WE RECEIVED STATED THAT FAULTY THRUST BUTTONS WILLFLOAT IN WATER AND GOOD PARTS WILL SINK. WE PERFORMED THIS TEST ON EVERY LOT NUMBER IN OURINVENTORY AND FOUND SEMay 9, 2026SDR 2026FA0000345Thrust Button · meltedUPON INSPECTION AFTER MAJOR ENGINE OVERHAUL, IT WAS DISCOVERED THAT THE ROCKER SHAFT THRUST BUTTONS HAD EITHER PARTIALLY OR COMPLETELY MELTED, ONLY ONE CYLINDER HAD BOTH THRUST BUTTONS COMPLETELY INTACT. MELTED PLASTIC DEBRIS WAS FOUND IN THE ROCKER COVERS ANDMay 9, 2026SDR 2026FA0000344Thrust Button · meltedUPON INSPECTION AFTER MAJOR ENGINE OVERHAUL, IT WAS DISCOVERED THAT ALL ROCKER SHAFT THURST BUTTONS HAD EITHER PARTIALLY OR COMPLETELY MELTED. MELTED PLASTIC DEBRIS WAS DISCOVERED IN THE ROCKER COVERS AND OIL SUMP SCREEN. DEFECTIVE THRUST BUTTONS WERE REMOVED May 9, 2026SDR 2026FA0000343Thrust Button · meltedINSPECTION PERFORMED SHORTLY AFTER MAJOR ENGINE OVERHAUL DUE TO SUSPECTED DEFECTIVE SUPERIOR ROCKER SHAFT THRUST BUTTONS INSTALLED AT MAJOR OVERHAUL. ALL THRUST BUTTONS WERE PARTIALLY MELTED AND DEFORMED WITH MELTED PLASTIC DEBRIS FOUND IN ROCKER COVER. DEFECTMay 9, 2026SDR 2026FA0000342Thrust Button · meltedINSPECTION PERFORMED SHORTLY AFTER MAJOR ENGINE OVERHAUL DUE TO SUSPECTED DEFECTIVE SUPERIOR ROCKER SHAFT THRUST BUTTONS INSTALLED AT MAJOR OVERHAUL. THRUST BUTTONS WERE PARTIALLY MELTED, DEFECTIVE THRUST BUTTONS REMOVED AND REPLACED WITH LYCOMING THRUST BUTTOMay 9, 2026SDR HYIA20260508003Cylinder · oil consumptionDURING SCHEDULED INSPECTION IT WAS NOTED THE LEFT ENGINE #1 CYLINDER HAD AN OIL FOULED PLUG AND EXCESSIVE OIL IN THE CYLINDER. THE #1 CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.May 5, 2026 · N915CA · Tecnam P2012SDR HYIA20260430001Cylinder · failed inspCREW REPORTED THE RIGHT ENGINE HAD AN OIL LEAK. MAINTENANCE INSPECTED THE ENGINE, BORESCOPED THE CYLINDERS AND FOUND THE #5 CYLINDER TO HAVE EXCESSIVE OIL POOLING AND PITTING ON THE EXHAUST VALVE. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.Apr 27, 2026 · N411CA · Tecnam P2012SDR 8HBR20260426083Tappet · separatedWHILE PERFORMING MAINTENANCE ON THE NR 3 CYLINDER ONE OF THE VALVE TAPPET BODIES SEPARATED.Apr 26, 2026 · N5366M · Cessna 152SDR 2026FA0000290Button · meltedUPON INSPECTION AFTER MAJOR ENGINE OVERHAUL, IT WAS DISCOVERED THAT THE ROCKER SHAFT THRUST BUTTONS HAD EITHER PARTIALLY OR COMPLETELY MELTED. A COMPLETE ENGINE TEARDOWN INSPECTION WAS THEN PERFORMED, ONLY ONE CYLINDER HAD BOTH THRUST BUTTONS COMPLETELY INTACTApr 23, 2026 · N9520 · Cessna 172RSDR 2026FA0000279Intake Valve · brokenPILOT REPORTED DURING CRUISE OPERATION A SUDDEN ENGINE ROUGHNESS WITH A LOSS OF POWER. EMERGENCY LANDING REQUESTED AND COMPLETED AT KOXR. INSPECTION OF ENGINE FOUND CYLINDER NUMBER 3 WITH HOLE THROUGH INTAKE PORT AND REAR BAFFLE. BORESCOPE INSPECTION REVEALED Apr 20, 2026 · N452X · Mooney M20JSDR HYIA20260424003Stud · brokenPILOT REPORTED DURING CRUISE, THE LEFT ENGINE ONLY PRODUCING 59% POWER AT 2100 RPM. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #6 CYLINDER TO HAVE TWO BROKEN CYLINDER STUDS. THE ENGINE WAS REPLACED WITH NO FURTHER DEFECTS NOTED.Apr 12, 2026 · N411CA · Tecnam P2012SDR HYIA20260410002Cylinder · low pressurePILOT REPORTED EXCESSIVE ENGINE VIBRATION DURING TAKE OFF AND CRUISE. MAINTENANCE INSPECTED AND FOUND THE #6 CYLINDER DEAD, THE CYLINDER WAS REPLACED ALONG WITH CYLINDER #5'S SPARK PLUGS WITH NO FURTHER DEFECTS NOTED.Apr 6, 2026 · N255CA · Tecnam P2012SDR 2026FA0000164Cylinder Head · crackedI HAVE MULTIPLE CRACKED CYLINDERS BETWEEN O-320-D2J AND O-320-D3G ENGINES, THE CYLINDER IS ALL CRACKING IS IN THE SAME LOCATION NEAR THE INTAKE PORT OF THE CYLINDER. THE FAILURE TIMES HAVE BEEN BETWEEN 1087.1 SFRM, 1980.5 SFOH, 1282.1 SFRB, MOST RECENTLY I HAMar 10, 2026SDR 2026FA0000159Cylinder · crackedPOSITION # 1 &2 CYLINDER EXHAUST PORT CRACK FROM THE INBOARD EXHAUST STUD EXTENDING TO THE BACK OF THE PORT. CRACK VISIBLE THROUGH THE FINS. SUPERIOR CYLINDERS PN: SL32006W-A1 SERIAL NUMBER 326W000003625 & 326W000003623.Mar 5, 2026 · N70052 · Cessna 172MSDR HYIA20260327007Exhaust Valve · failedPILOT REPORTED RIGHT ENGINE HIGH EGT DURING CRUISE FLIGHT. MAINTENANCE INSPECTED AND FOUND THE NR 4 EXHAUST VALVE CHIPPED NEAR VALVE SEAT. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.Feb 26, 2026 · N288CA · Tecnam P2012SDR 2026FA0000142Cylinder · crackedDURING ANNUAL INSPECTION, I WAS BORESCOPING TCM TSIO 550 K ENGINE AND FOUND NUMBER 2 CYLINDER INTAKE VALVE CRACKED AND THE EDGES WERE CHIPPED AWAY. THE CYLINDER ONLY HAD 220 HOURS SINCE OVERHAUL. I REMOVED THE CYLINDER ASSEMBLY AND SENT TO CONTINENTAL ENGINES Feb 25, 2026 · N267HH · Cirrus SR22TSDR HYIA20260327006Cylinder · scoredDURING INSPECTION IT WAS FOUND THE NR 3 CYLINDER ON THE LEFT ENGINE HAD SCORING ON THE CYLINDER WALLS CAUSED BY A BROKEN OIL CONTROL RING. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.Feb 17, 2026 · N357CA · Tecnam P2012SDR HYIA20260327005Intake Valve · failedPILOT REPORTED THE RIGHT ENGINE CHT & EGT DROPPED RAPIDLY, ALONG WITH FUEL PRESSURE, AS WELL AS AIRCRAFT YAW AND ENGINE ROUGHNESS. MAINTENANCE INSPECTED AND FOUND THE RIGHT ENGINE #3 CYLINDER INTAKE VALVE FAILED, AND THE VALVE STEM BECAME LODGED IN THE CYLINDEFeb 9, 2026 · N244CA · Tecnam P2012SDR 2026FA0000138Retainer · brokenON 1/16/26 AT APPROX 2030Z 2NM NE OF THE LAKE MURRAY DAM, ON A FLT FROM KCUB - KEOE AT 2000' MSL, ENGINE BEGAN EXPERIENCING SEVERE VIBRATION & RPM LOSS. ENG BEGAN SPUTTERING & SHUT OFF. MIXTURE WAS FULLY ENRICHED & THROTTLE MOVED TO THE FULL POSITION, ENG THEJan 16, 2026 · N6862F · Cessna 150SDR 2026FA0000623Cylinder · scoredTHIS IS A NEW AIRCRAFT. LESS THAN 50HRS HAD BEEN FLOWN BEFORE WE FOUND ISSUES. LOGBOOK ENTRY, AIRCRAFT HAD A HARD STARTING CONDITION. FOUND STUCK INTAKE VALVES ON CYLINDERS 2, 4 & 5 WHILE DOING A COLD COMPRESSION CHECK. UPON FURTHER INSPECTION ALL THE EXHAUSTDec 5, 2025 · N306VA · Robsin R44SDR 2025FA0000780Cylinder · crackedDURING ROUTINE ANNUAL/100HOUR INSPECTIONS 9 CYLINDERS HAVE BEEN FOUND TO BE CRACKED IN THE SAME LOCATION BETWEEN 4 DIFFERENT AIRCRAFT. ON THE LYCOMING O-320 SERIES OF ENGINES. THEY HAVE BEEN FOUND BETWEEN 591 AND 2261 HOURS.Nov 24, 2025SDR 2026F00198Cylinder · damagedORIGINAL INSTALL DATE 8-28-2023. NEW CYLINDERS REMOVED AT 434HRS BY MECHANIC DUE TO RING FLUTTER, RING CHATTER, WASHBOARDING. INCONSISTENT METAL WEAR PATTERN ON THE NITRIDE BORE. DISCOVERED BY BORESCOPE AT 100HR INSPECTION. MANUFACTURER REPLACED CYLINDERS WITHNov 9, 2025 · N4144E · Piper PA18150SDR HYIA20260327002Nut · brokenDURING TROUBLESHOOTING FOR A HIGH OIL CONSUMPTION CONCERN, IT WAS DISCOVERED THE RH ENG #2 CYLINDER BASE NUTS 1/2 IN. #3 AND 3/8 # 2,3,4 BROKEN AND MISSING FROM THROUGH STUDS. THE ENGINE WAS REPLACED WITH NO FURTHER ISSUES NOTED.Oct 26, 2025 · N699CA · Tecnam P2012SDR 2026FA0000089Cylinder · fracturedAFER TAKING ON FUEL AT BAF, THE AIRCRAFT DEPARTED FOR 47N. WHILE CLIMBING OUT THROUGH 2500 MSL, THE AIRCRAFT ENGINE SUFFERED CATASTROPHIC FAILURE OF CYLINDER NUMBER 4. THE UPPER SECTION OF THE CYLINDER BARREL SEPERATED FROM THE LOWER SECTION APPROXIMATELY FOUROct 11, 2025 · N63079 · Cessna 150MSDR 2025FA0000713Exhaust Valve · failedEXHAUST VALVE FAILED DUE TO HEAT STRESS, CAUSING LOW COMPRESSION, LOW ENGINE SPEED AND ENGINE VIBRATIONS WHILE AT CRUISE.Oct 10, 2025 · N739DB · Cessna 172NSDR N3XR20250926001Piston · crackedDURING TAKE OFF THE LEFT ENGINE FAILED AND WAS SHUT DOWN AND FEATHERED. OIL WAS SEEN STREAMING FROM THE COWLING. A BORE SCOPE INSPECTION REVEALED THE #1 PISTON FAILED.Sep 25, 2025 · N329ER · Diamon DA42SDR 2025FA0000663Valve · failed inspDURING ROUTINE 100 HR INSPECTION FOUND COMPRESSION TO BE 40/80 ON CYLINDER #4 AND INSPECTED FURTHER. FOUND THAT VALVE WAS NOT SEATING PROPERLY. VALVE SEAT WAS BELL MOUTHED, VALVE PUSHES IN AN OUT ON A CURVE RATHER THAN STRAIGHT, WORN ONLY ON ONE SIDE. IMPROPSep 25, 2025 · N3939X · Piper PA28151SDR 2025FA0000662Intake Valve · damagedTHE INTAKE VALVE HAS MATERIAL MISSING IN I LOCATIONS AROUND THE PERIMETER OF THE VALVE HEAD SEAT AREA, LT APPEARS TO BE VALVE FAILURE AND NOT FOD, (OTHER INFO FOUND ON VALVE WFAA PMA719077QITALY),Sep 24, 2025 · N66919 · Beech A36SDR 2026FA0000627Pushrod · scoredTHIS HELICOPTER IS FACTORY NEW FROM MANUFACTUER AND THE SECOND HELICOPTER WE FOUND THIS SAME ISSUE ON. ALL OF THE ROCKER ARMS AND PUSHROD CAPS WERE FOUND TO HAVE SIGNIFICANT SCORING WHERE THE MAKE CONTACT WITH EACH OTHER DURING ITS FIRST 100HR INSPECTION WHILESep 12, 2025 · N223VA · Robsin R22SDR 2025FA0000633Cylinder Head · crackedNR 4 CYLINDER HEAD CRACKED ACROSS COOLING FINS IN FLIGHT. CREW NOTICED LOSS OF POWER/SHUDDER.Sep 9, 2025 · N99040 · Cessna 172PSDR 2025FA0000641Connecting Rod · failedNR 6 CONECTING ROD FAILED IN FLIGHT.Aug 16, 2025 · N312AK · Piper PA31350SDR 2025FA0000589Exhaust Valve · departedAIRCRAFT WAS IN CRUISE FLIGHT IN BANNER TOW CONFIGURATION. A LOUD AUDITABLE BANG WAS HEARD. ENGINE EXPERIENCED EXTREME VIBRATION FOLLOWED BY TOTAL LOSS OF POWER. PILOT CONDUCTED A FORCED LANDING IN A SOCCER FIELD. UPON ENGINE INSPECTION, #2 CYL. EXPERIENCEAug 14, 2025 · N476SM · Piper PA18180SDR ECPR2025081833027Valve Guide · out of limitsDURING A SIMULATED ENGINE FAILURE FOR A CFIA LESSON, THE ENGINE EXPERIENCED ROUGHNESS AND PARTIAL POWER LOSS DURING THE PLANNED GO-AROUND AT 800 FEET. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. POST FLIGHT INSPECTION REVEALED Aug 14, 2025 · N8578Z · Piper PA28161SDR ODAR2025080600002Cylinder Head · crackedSUBSTANTIAL ENGINE VIBRATION REPORTED BY PILOT DURING FLIGHT. #4 CHT CONSISTENTLY ~40% HIGHER THAN OTHER CYLINDERS. MAG CHECKS NORMAL. VIBRATION REMAINED THE SAME REGARDLESS OF MAGS SELECTED. OIL PRESSURE AND TEMP REMAINED IN GREEN. PERFORMED COMPRESSION CHECKAug 6, 2025 · N694CP · Cessna 172SSDR 2025FA0000531Piston · disintegratedSUPERIOR PISTON ASSY PART # SA640518 INSTALLED. WITHIN 40 HOURS OF INSTALLATION PISTON DISINTEGRATED RESULTING IN EXTREME VIBRATION. ENGINE WAS SHUTDOWN AND LANDING MADE IN FIELD WITHOUT INCIDENT.Jul 29, 2025 · N9628 · Cessna 180SDR 2025FA0000508Exhaust Rocker · shearedDURING FLIGHT THE NR 4-CYLINDER EXHAUST ROCKER ARM HOLD DOWN STUDS BROKE CAUSING THE NR 4-CYLINDER EXHAUST VALVE TO NOT OPEN. THIS CAUSED EXTREME VIBRATION AND A SIGNIFICANT LOSS OF ENGINE POWER. AIRCRAFT WAS WITHIN GLIDING DISTANCE OF RUNWAY AND LANDED SAFELYJul 8, 2025 · N924DA · Diamon DA20C1
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