# Service difficulty reports: JASC 8530

A list on [JASC 8530](https://openairdocs.org/jasc/8530.md).

Reports filed under 8530 · Reciprocating Engine Cylinder Section, newest first.

Page 1 of 87 · 4,340 reports

- [SDR 2026FA0000822](https://openairdocs.org/sdr/2026FA0000822.md): Cylinder · cracked · Oct 2, 2026 · N1096W · Cirrus SR22T
  > DISCOVERED CRACKED CYLINDER #3 FOLLOWING A ROUTINE INSPECTION FOR SB25-04.
- [SDR 8HBR20261010088](https://openairdocs.org/sdr/8HBR20261010088.md): Cylinder Head · rotated · Sep 30, 2026 · N46889 · Cessna 152
  > DURING 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 APPEARE
- [SDR 2026FA0000796](https://openairdocs.org/sdr/2026FA0000796.md): Lock Tab · misinstalled · Sep 30, 2026 · N621K · Cirrus SR22
  > REMOVED 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 LOCKING
- [SDR VT9R2026092400782](https://openairdocs.org/sdr/VT9R2026092400782.md): Pushrod · galled · Sep 24, 2026 · N925KM · Robsin R22BETAII
  > THIS 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 A
- [SDR 2026FA0000832](https://openairdocs.org/sdr/2026FA0000832.md): Clamp · broken · Sep 13, 2026 · N340LL · Cessna 340A
  > AIRCRAFT 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 PO
- [SDR HYIA20260917002](https://openairdocs.org/sdr/HYIA20260917002.md): Cylinder · cracked · Sep 10, 2026 · N133CA · Tecnam P2012
  > DURING NORMAL INSPECTION THE #1 CYLINDER ON THE RIGHT ENGINE WAS FOUND TO BE CRACKED. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.
- [SDR 2026FA0000672](https://openairdocs.org/sdr/2026FA0000672.md): Cylinder · separated · Aug 27, 2026 · N9772H · Cessna 182R
  > CYLINDER 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 FLAN
- [SDR V79R2026090600629](https://openairdocs.org/sdr/V79R2026090600629.md): Pushrod · scored · Aug 5, 2026 · N728TK · Robsin R22BETA
  > THIS 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 PARTS
- [SDR V79R2026090600628](https://openairdocs.org/sdr/V79R2026090600628.md): Pushrod · scored · Jul 30, 2026 · N925KM · Robsin R22BETA
  > THIS 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. "REMOVED
- [SDR 2026FA0000519](https://openairdocs.org/sdr/2026FA0000519.md): Cylinder · cracked · Jun 15, 2026 · N5251Z · Cessna 172S
  > PILOT 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).
- [SDR 2026FA0000508](https://openairdocs.org/sdr/2026FA0000508.md): Cylinder · separated · Jun 10, 2026 · N28TN · Doug R4D8
  > ON 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 DOW
- [SDR 2026FA0000404](https://openairdocs.org/sdr/2026FA0000404.md): Cylinder Head · separated · May 18, 2026 · N444AN · Cirrus SR22T
  > SEPARATION OF CYLINDER HEAD, EXHAUST SIDE FROM NR 5 CYLINDER DURING CRUISE/LEVEL FLIGHT. APPROXIMATELY 30 MINUTES INTO FLIGHT.
- [SDR 2026FA0000422](https://openairdocs.org/sdr/2026FA0000422.md): Intake Valve · broken · May 11, 2026 · N62BV · Beech C24R
  > DURING 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
- [SDR 2026FA0000347](https://openairdocs.org/sdr/2026FA0000347.md): Thrust Button · faulty · May 9, 2026
  > DURING 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
- [SDR 2026FA0000346](https://openairdocs.org/sdr/2026FA0000346.md): Thrust Button · faulted · May 9, 2026
  > DURING 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 SE
- [SDR 2026FA0000345](https://openairdocs.org/sdr/2026FA0000345.md): Thrust Button · melted · May 9, 2026
  > UPON 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 AND
- [SDR 2026FA0000344](https://openairdocs.org/sdr/2026FA0000344.md): Thrust Button · melted · May 9, 2026
  > UPON 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
- [SDR 2026FA0000343](https://openairdocs.org/sdr/2026FA0000343.md): Thrust Button · melted · May 9, 2026
  > INSPECTION 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. DEFECT
- [SDR 2026FA0000342](https://openairdocs.org/sdr/2026FA0000342.md): Thrust Button · melted · May 9, 2026
  > INSPECTION 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 BUTTO
- [SDR HYIA20260508003](https://openairdocs.org/sdr/HYIA20260508003.md): Cylinder · oil consumption · May 5, 2026 · N915CA · Tecnam P2012
  > DURING 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.
- [SDR HYIA20260430001](https://openairdocs.org/sdr/HYIA20260430001.md): Cylinder · failed insp · Apr 27, 2026 · N411CA · Tecnam P2012
  > CREW 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.
- [SDR 8HBR20260426083](https://openairdocs.org/sdr/8HBR20260426083.md): Tappet · separated · Apr 26, 2026 · N5366M · Cessna 152
  > WHILE PERFORMING MAINTENANCE ON THE NR 3 CYLINDER ONE OF THE VALVE TAPPET BODIES SEPARATED.
- [SDR 2026FA0000290](https://openairdocs.org/sdr/2026FA0000290.md): Button · melted · Apr 23, 2026 · N9520 · Cessna 172R
  > UPON 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 INTACT
- [SDR 2026FA0000279](https://openairdocs.org/sdr/2026FA0000279.md): Intake Valve · broken · Apr 20, 2026 · N452X · Mooney M20J
  > PILOT 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
- [SDR HYIA20260424003](https://openairdocs.org/sdr/HYIA20260424003.md): Stud · broken · Apr 12, 2026 · N411CA · Tecnam P2012
  > PILOT 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.
- [SDR HYIA20260410002](https://openairdocs.org/sdr/HYIA20260410002.md): Cylinder · low pressure · Apr 6, 2026 · N255CA · Tecnam P2012
  > PILOT 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.
- [SDR 2026FA0000164](https://openairdocs.org/sdr/2026FA0000164.md): Cylinder Head · cracked · Mar 10, 2026
  > I 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 HA
- [SDR 2026FA0000159](https://openairdocs.org/sdr/2026FA0000159.md): Cylinder · cracked · Mar 5, 2026 · N70052 · Cessna 172M
  > POSITION # 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.
- [SDR HYIA20260327007](https://openairdocs.org/sdr/HYIA20260327007.md): Exhaust Valve · failed · Feb 26, 2026 · N288CA · Tecnam P2012
  > PILOT 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.
- [SDR 2026FA0000142](https://openairdocs.org/sdr/2026FA0000142.md): Cylinder · cracked · Feb 25, 2026 · N267HH · Cirrus SR22T
  > DURING 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
- [SDR HYIA20260327006](https://openairdocs.org/sdr/HYIA20260327006.md): Cylinder · scored · Feb 17, 2026 · N357CA · Tecnam P2012
  > DURING 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.
- [SDR HYIA20260327005](https://openairdocs.org/sdr/HYIA20260327005.md): Intake Valve · failed · Feb 9, 2026 · N244CA · Tecnam P2012
  > PILOT 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 CYLINDE
- [SDR 2026FA0000138](https://openairdocs.org/sdr/2026FA0000138.md): Retainer · broken · Jan 16, 2026 · N6862F · Cessna 150
  > ON 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 THE
- [SDR 2026FA0000623](https://openairdocs.org/sdr/2026FA0000623.md): Cylinder · scored · Dec 5, 2025 · N306VA · Robsin R44
  > THIS 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 EXHAUST
- [SDR 2025FA0000780](https://openairdocs.org/sdr/2025FA0000780.md): Cylinder · cracked · Nov 24, 2025
  > DURING 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.
- [SDR 2026F00198](https://openairdocs.org/sdr/2026F00198.md): Cylinder · damaged · Nov 9, 2025 · N4144E · Piper PA18150
  > ORIGINAL 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 WITH
- [SDR HYIA20260327002](https://openairdocs.org/sdr/HYIA20260327002.md): Nut · broken · Oct 26, 2025 · N699CA · Tecnam P2012
  > DURING 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.
- [SDR 2026FA0000089](https://openairdocs.org/sdr/2026FA0000089.md): Cylinder · fractured · Oct 11, 2025 · N63079 · Cessna 150M
  > AFER 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 FOUR
- [SDR 2025FA0000713](https://openairdocs.org/sdr/2025FA0000713.md): Exhaust Valve · failed · Oct 10, 2025 · N739DB · Cessna 172N
  > EXHAUST VALVE FAILED DUE TO HEAT STRESS, CAUSING LOW COMPRESSION, LOW ENGINE SPEED AND ENGINE VIBRATIONS WHILE AT CRUISE.
- [SDR N3XR20250926001](https://openairdocs.org/sdr/N3XR20250926001.md): Piston · cracked · Sep 25, 2025 · N329ER · Diamon DA42
  > DURING 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.
- [SDR 2025FA0000663](https://openairdocs.org/sdr/2025FA0000663.md): Valve · failed insp · Sep 25, 2025 · N3939X · Piper PA28151
  > DURING 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. IMPROP
- [SDR 2025FA0000662](https://openairdocs.org/sdr/2025FA0000662.md): Intake Valve · damaged · Sep 24, 2025 · N66919 · Beech A36
  > THE 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),
- [SDR 2026FA0000627](https://openairdocs.org/sdr/2026FA0000627.md): Pushrod · scored · Sep 12, 2025 · N223VA · Robsin R22
  > THIS 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 WHILE
- [SDR 2025FA0000633](https://openairdocs.org/sdr/2025FA0000633.md): Cylinder Head · cracked · Sep 9, 2025 · N99040 · Cessna 172P
  > NR 4 CYLINDER HEAD CRACKED ACROSS COOLING FINS IN FLIGHT. CREW NOTICED LOSS OF POWER/SHUDDER.
- [SDR 2025FA0000641](https://openairdocs.org/sdr/2025FA0000641.md): Connecting Rod · failed · Aug 16, 2025 · N312AK · Piper PA31350
  > NR 6 CONECTING ROD FAILED IN FLIGHT.
- [SDR 2025FA0000589](https://openairdocs.org/sdr/2025FA0000589.md): Exhaust Valve · departed · Aug 14, 2025 · N476SM · Piper PA18180
  > AIRCRAFT 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. EXPERIENCE
- [SDR ECPR2025081833027](https://openairdocs.org/sdr/ECPR2025081833027.md): Valve Guide · out of limits · Aug 14, 2025 · N8578Z · Piper PA28161
  > DURING 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
- [SDR ODAR2025080600002](https://openairdocs.org/sdr/ODAR2025080600002.md): Cylinder Head · cracked · Aug 6, 2025 · N694CP · Cessna 172S
  > SUBSTANTIAL 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 CHECK
- [SDR 2025FA0000531](https://openairdocs.org/sdr/2025FA0000531.md): Piston · disintegrated · Jul 29, 2025 · N9628 · Cessna 180
  > SUPERIOR 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.
- [SDR 2025FA0000508](https://openairdocs.org/sdr/2025FA0000508.md): Exhaust Rocker · sheared · Jul 8, 2025 · N924DA · Diamon DA20C1
  > DURING 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 SAFELY

Next page: https://openairdocs.org/jasc/8530/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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
```

This list as a web page: https://openairdocs.org/jasc/8530/reports

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