# Service difficulty reports: JASC 8500

A list on [JASC 8500](https://openairdocs.org/jasc/8500.md).

Reports filed under 8500 · Engine (Reciprocating), newest first.

Page 1 of 15 · 745 reports

- [SDR QMLA2026101320078](https://openairdocs.org/sdr/QMLA2026101320078.md): Synchrophaser · out of adjust · Oct 12, 2026 · N912SM · Beech B200GT
  > LEFT PROP LEVER ACTING LIKE IT WAS HOOKED UP BACKWARDS. PUSHING THE LEVER FORWARD INCREASED RPM, AND VICE VERSA. ADJUSTED LT ENGINE PROPELLER SYNCHROPHASER MAGNETIC PICKUPS IAW KING AIR B200GT AMM 61-23-01. PERFORMED REQUIRED FUNCTIONAL GROUND CHECKS. NO FAULT
- [SDR 2026FA0000693](https://openairdocs.org/sdr/2026FA0000693.md): Engine · fod · Sep 15, 2026
  > DURING THE DISASSEMBLY OF ENGINE MM03 (ESN: 577403), THE MECHANIC DISCOVERED A FOD INSIDE THE ENGINE. A 5/16 WRENCH WAS FOUND SEVERELY CRUSHED AND JAMMED BETWEEN THE SM53 INNER AIR SEAL AND THE SM54 DISK.
- [SDR 2026FA0000681](https://openairdocs.org/sdr/2026FA0000681.md): Gascolator · dirty · Sep 3, 2026 · N172UZ · Cessna 172P
  > PILOT REPORTED LOW POWER AND VIBRATION ON TAKEOFF AND ABORTED TAKEOFF. CLEANED GASCOLATOR AND AGGRESSIVELY FUEL TANKS AND BELLY SUMPS. NO WATER WAS PRESENT. VERIFIED PROPELLER TORQUE AND CHECKED DYNAMIC BALANCE DUE TO A RECENT PROPELLER INSTALLATION. PROPELLER
- [SDR N3XR 08 13](https://openairdocs.org/sdr/N3XR%2008%2013.md): Crankcase · punctured · Aug 4, 2026 · N323ER · Diamon DA42
  > LEFT ENGINE OIL LEAK ON TAKEOFF WITH WHITE SMOKE, CREW FEATHERED AND LANDED. DURING INSPECTION, A HOLE WAS FOUND IN THE CRANKCASE, AND ANOTHER LOCATION SHOWED A FRACTURED CASE. THE ENGINE WAS DISASSEMBLED, AND A CRANKSHAFT BOLT E4A-10-100-202 WAS FOUND TO HAVE
- [SDR 2026FA0000594](https://openairdocs.org/sdr/2026FA0000594.md): Cylinder Head · cracked · Jul 17, 2026 · N719LL
  > NUMBER 3 CYLINDER OIL LEAK. STILL LEAKING AFTER REPLACING ROCKER BOX GASKETS AND PUSHROD TUBE SEALS. DETAILED VISUAL INSPECTION REVEALED A 2.5 INCH CRACK IN THE WEBBING SUPPORT BETWEEN THE TWO ROCKER BOXES. CYLINDER REMOVED AND REPLACED WITH NEW.
- [SDR 141A2026062900001](https://openairdocs.org/sdr/141A2026062900001.md): Engine · faulted · Jun 29, 2026 · N9481F · Cessna 208
  > DURING CLIMB TO CRUISE, PASSING THROUGH 6000 TO 8000 FT THE ENGINE ITT WAS AT 740, WITH THE POWER BEING SET AT ONLY 1200LBS OF TORQUE. WE WERE ONLY ABLE TO MAINTAIN CLIMB RATE OF 200-300 FPM WITH AIRSPEED AT 95-100 INDICATED KNOTS. AT CRUISE ALTITUDE OF 8000FT
- [SDR 2026FA0000501](https://openairdocs.org/sdr/2026FA0000501.md): Vent Line · faulted · Jun 10, 2026
  > THIS IS AN AMPHIBIAN DESIGN WITH THE ENG MOUNTED ABOVE THE WING. THE SEAMAX M22 HAS HAD ENGINE FIRES. THERE ARE A TOTAL OF 5 FUEL VENT LINES THAT EXHAUST INTO THE ENGINE NACELLE. 2 COME FROM THE RIGHT WING TANK, 2 COME FROM THE LEFT WING TANK, AND 1 COMES FRO
- [SDR 2026FA0000407](https://openairdocs.org/sdr/2026FA0000407.md): Engine · failed · May 11, 2026 · N314VV · Tecnam PMENTOR
  > DURING A SOLO CROSS-COUNTRY FLIGHT, THE PILOT EXPERIENCED A SUDDEN ENG MALFUNCTION WHILE CRUISING AT APPROX 4,500 FT MSL NEAR KCSQ. THE ENGINE BEGAN OPERATING EXTREMELY ROUGH, ACCOMPANIED BY A FLASHING LANE A WARNING INDICATION & MULTIPLE INSTRUMENT DISPLAY FA
- [SDR 2026FA0000597](https://openairdocs.org/sdr/2026FA0000597.md): Engine · failed · Apr 16, 2026 · N93021 · Cessna U206F
  > COMPLETE LOSS OF POWER IN CRUISE FLIGHT, AIRCRAFT WAS DITCHED AND UNRECOVERABLE.
- [SDR 2026FA0000212](https://openairdocs.org/sdr/2026FA0000212.md): Engine · making metal · Mar 25, 2026 · N89109 · Cessna 140
  > DURING THE ENGINE OVERHAUL, UNDER THE DISASSEMBLY PROCESS, WE FOUND A MOUNTED EXTERNAL SPIN-ON OIL FILTER. HOWEVER, THE ENGINE STILL RETAINED ITS ORIGINAL INTERNAL MESH OIL FILTER. THE ORIGINAL FILTER CONTAINED A SIGNIFICANT AMOUNT OF OIL SLUDGE, DEPOSITS, AND
- [SDR HYIA20260327004](https://openairdocs.org/sdr/HYIA20260327004.md): Engine · making metal · Jan 14, 2026 · N135CA · Tecnam P2012
  > PILOT REPORTED LEFT ENGINE LOW OIL PRESSURE, WHICH DROPPED INTO THE RED DURING LANDING. MAINTENANCE INSPECTED AND FOUND METAL CONTAMINATION IN THE LEFT ENGINE AND OIL POOLING IN 5 OUR OF 6 CYLINDERS. THE ENGINE WAS REPLACED WITH NO FURTHER DEFECTS NOTED.
- [SDR N3XR202510300002](https://openairdocs.org/sdr/N3XR202510300002.md): Dampener · failed · Oct 30, 2025 · N316ER · Diamon DA42
  > DURING TROUBLESHOOTING FOR LOW POWER OUTPUT, THE TORSIONAL VIBRATION DAMPER WAS FOUND DAMAGED, WITH SEVERAL BROKEN PIECES MISSING FROM IT. IT WAS ALLOWING SLIPPAGE WHILE DRIVING THE PROPELLER.
- [SDR 2025FA0000573](https://openairdocs.org/sdr/2025FA0000573.md): Nut · mismanufactured · Aug 25, 2025
  > WE ARE SEEING ISSUES WITH NEW SL12186 CONNECTING ROD BOLTS DURING INSTALLATION. THE ROD NUTS "WOBBLE" DURING INSTALLATION AND DO NOT SEAT FLUSH AFTER INSTALLATION. IT APPEARS THAT THE THREADS WERE MACHINED OFF CENTER.
- [SDR 2025FA0000558](https://openairdocs.org/sdr/2025FA0000558.md): Engine · power loss · Aug 20, 2025 · N960JP · Beech 200CBEECH
  > PARTIAL POWER LOSS ON TAKEOFF. REJECTED TAKEOFF LEFT SIDE. PERFORMED A VISUAL INSPECTION OF BOTH ENGINES WITH NO DEFECTS NOTED. PERFORMED ENGINE PERFORMANCE GROUND RUNS WITH NO ISSUES FOUND DURING RUNS. ALL PARAMETERS WITHIN LIMITS. AIRCRAFT TEST FLIGHT GOOD N
- [SDR 2025F00229](https://openairdocs.org/sdr/2025F00229.md): Engine · failed · Aug 15, 2025 · Bnorm BN2A
  > FLT NUMBER: DVR023, ENGINE FAILURE AND EMERGENCY LANDING. SHORTLY AFTER DEPARTURE FROM BON, THE CREW EXPERIENCED A LOSS OF FUEL PRESSURE AND OBSERVED A DECREASING OIL PRESSURE ON THE LEFT-HAND (LH) ENGINE. DUE TO THESE CRITICAL INDICATIONS, A PRECAUTIONARY SH
- [SDR 2025FA0000516](https://openairdocs.org/sdr/2025FA0000516.md): Engine · auto shutdown · Jul 23, 2025 · N21483 · Cessna 172S
  > AIRCRAFT AND CREW EXPERIENCED ENGINE ROUGHNESS AND THE ENGINE QUITTING WHILE IN FLIGHT. THE CREW AND AIRCRAFT MADE AN UNPOWERED SAFE LANDING AT KARR (HOME AIRPORT). INITIAL INSPECTION FOUND THAT THE PROP WAS FREEWHEELING WITH NO RESISTANCE. NR 3 CYLINDER HAD A
- [SDR UOIA202507020001](https://openairdocs.org/sdr/UOIA202507020001.md): Idler Gear · damaged · Jul 2, 2025 · N904GD · Bnorm BN2B26
  > PILOT REPORTED THAT DURING CRUISE FLIGHT FROM TJIG TO TJCP LEFT ENGINE OIL PRESSURE STARTED DROPPING AND AFTER A FEW SECONDS PROPELLER FETHERED BY ITSELF AND ENGINE SHUT DOWN. PILOT PERFORMED ENGINE FAILURE PROCEDURE AS PER FLIGHT MANUAL AND DIVERTED TO TJRV A
- [SDR 2025FA0000218](https://openairdocs.org/sdr/2025FA0000218.md): Engine · power loss · Mar 27, 2025 · N971TH · Cessna 172S
  > WHILE IN STRAIGHT AND LEVEL FLIGHT PILOT REPORTED THE ENGINE RPM REDUCED SIGNIFYINGLY RESULTING IN POWER LOSS. AFTER A BRIEF TIME THE ENGINE RPM BEGAN TO OPERATE NORMALLY AND POWER WAS RESTORED. PILOT LANDED WITHOUT INCIDENT. TROUBLESHOOTING COULD NOT DUPLI
- [SDR 2025FA0000217](https://openairdocs.org/sdr/2025FA0000217.md): Engine · power loss · Mar 27, 2025 · N796T
  > ON TAKE-OFF THE ENGINE LOST POWER MOMENTARILY AND PILOT WAS ABLE TO ABORT TAKE-OFF AND LAND WITHOUT INJURIES. POWER RESTORED ITS SELF AND TROUBLESHOOTING COULD NOT DUPLICATE THE LOSS OF POWER.
- [SDR 2025FA0000196](https://openairdocs.org/sdr/2025FA0000196.md): Connecting Rod · damaged · Mar 18, 2025 · Cessna T206H
  > ENGINE WAS RECEIVED BY EJ1R FOR SUDDEN STOPPAGE INSPECTION RESULTING FROM PRECAUTIONARY OFF FIELD LANDING DUE TO BROKEN EXHAUST VALVE ON CYLINDER #5. DURING SUDDEN STOPPAGE TEARDOWN INSPECTION WHILE CLEANING AND VISUALLY INSPECTING CONNECTING RODS, #1 CONNECTI
- [SDR 2025FA0000015](https://openairdocs.org/sdr/2025FA0000015.md): Pushrod · separated · Jan 14, 2025 · N2338
  > DURING A FLIGHT AT CRUISE PHASE (PIPER SEMINOLE), THE PILOT REPORTED A POWER DECREASE AND PROCEEDED TO THE NEAREST AIRPORT. AT A PRELIMINARY INSPECTION, IT WAS FOUND THAT THE PUSH ROD ASSEMBLY HAD BROKEN THE VALVE ROCKER ARM. WE WOULD BE VERY GRATEFUL FOR YO
- [SDR 2025FA0000065](https://openairdocs.org/sdr/2025FA0000065.md): Engine · destroyed · Jan 13, 2025 · N144TD · Beech A36
  > DURING CRUISE FLIGHT AT 7500 FT. THERE WAS A SUDDEN LOUD BANG AND VIBRATION. THE COCKPIT FILLED WITH SMOKE AND THE WINDSCREEN COVERED IN OIL. UPON A VISUAL INSPECTION OF THE ENGINE THERE WAS MULTIPLE HOLES IN THE ENGINE CASE. THE LARGEST HOLE WAS BETWEEN CYLIN
- [SDR 2025FA0000017](https://openairdocs.org/sdr/2025FA0000017.md): Engine · seized · Nov 24, 2024 · N977GV · Tecnam P2006T
  > IN FLIGHT LEFT ENGINE SEIZED AND PIC WAS UNABLE TO FEATHER PROPELLER AND PILOTS HAD TO DIVERT TO ALTERNATE AIRPORT. I WENT ON-SITE 12/08/2024 TO INSPECT AND SEE WHAT MIGHT OF CAUSED THE FAILURE OF LEFT ENGINE. INSPECTION OF ENGINE WITH BORESCOPE VIA THE SPAR
- [SDR FXGA2024102100780](https://openairdocs.org/sdr/FXGA2024102100780.md): Rod End · damaged · Oct 17, 2024 · N408RE · Textrn 408
  > INERTIAL SEPARATOR ACTUATOR TOP ATTACHMENT ROD END LOOSENED AND BECAME EXCESSIVELY LOOSE ON BOTH LEFT AND RIGHT ENGINES. THE NUT RETAINER BRACKET OF THE RIGHT ENGINE'S I/S ACT. ROD END BROKE AT THE BOLT HOLE AND THE BRACKET WAS FOUND ON TOP OF THE ENGINE INLET
- [SDR 2025FA0000084](https://openairdocs.org/sdr/2025FA0000084.md): Engine · faulted · Oct 5, 2024 · N3715
  > ON OCTOBER 5, 2024, THE PILOT IN COMMAND DEPARTED FROM RUNWAY 31 AT KPVU IN AIRCRAFT N3715V AFTER COMPLETING A STANDARD PRE-FLIGHT RUN-UP. SHORTLY AFTER TAKEOFF, THE PILOT OBSERVED ABNORMAL ENGINE PERFORMANCE AND A REDUCTION IN RPM. IN RESPONSE, THE PILOT MADE
- [SDR 2024FA0000752](https://openairdocs.org/sdr/2024FA0000752.md): Tube · broken · Oct 3, 2024 · N8581A · Piper PA25
  > ENGINE EXPERIENCED ROUGHNESS AND POWER REDUCTION DURING FLIGHT, BUT LANDED WITHOUT FURTHER INCIDENT. INSPECTION FOUND THAT THE FUEL INJECTION LINE CONNECTING THE FLOW DIVIDER TO THE INJECTOR NOZZLE WAS BROKEN ON #1 CYLINDER. THE BREAK OCCURRED AT THE BRAZED/
- [SDR 2024FA0000677](https://openairdocs.org/sdr/2024FA0000677.md): Engine · blown · Aug 21, 2024 · N452TX · Cirrus SR22
  > ON AUGUST 21,2024 I HAD A MAJOR ENGINE FAILURE ON TAKEOFF AT 2800 FT AGL. FORTUNATELY I WAS ABLE TO RETURN TO THE AIRPORT AND LAND. I HAD FLOWN THE PLANE FOR 6 HOURS IN THE 2 PREVIOUS DAYS WITH NO ISSUES. EVERYTHING SEEMED FINE DURING THE PRE-FLIGHT AND RUN UP
- [SDR 2024FA0000492](https://openairdocs.org/sdr/2024FA0000492.md): Engine · vibration · Jul 4, 2024 · N334KW · Beech F33A
  > AFTER TAKEOFF FROM KBIL, PILOT NOTICED VIBRATION FROM ENGINE. PILOT RETURNED TO KBIL WITHOUT INCIDENT.
- [SDR HYIA20240711003](https://openairdocs.org/sdr/HYIA20240711003.md): Engine · overspeed · Jul 2, 2024 · N411CA · Tecnam P2012
  > THROUGH REVIEW OF ENGINE PERFORMANCE DATA IT WAS DISCOVERED THE RIGHT ENGINE WAS OVER SPED BY MORE THAN 10% DURING FLIGHT TRAINING DOING BACK-TO-BACK PRACTICES OF SIMULATED ENGINE OUT OPERATIONS. PER MANUFACTURE'S GUIDANCE THE ENGINE WILL BE REPLACED.
- [SDR 2024FA0000410](https://openairdocs.org/sdr/2024FA0000410.md): Idler Gear · broken · May 30, 2024 · N67778 · Cessna 152
  > PILOT IN FLIGHT NOTICED ENGINE RPM TO DROP SIGNIFICANTLY AND THE ENGINE RUNNING ROUGH. PERFORMED INSPECTION OF ENGINE AND NOTED CYLINDER VALVES NOT ACTUATING. REMOVED ENGINE SUMP AND FOUND PORTION OF CAMSHAFT IDLER GEAR IN SUMP. REMOVED ACCESSORY HOUSING AN
- [SDR XGNA202404080002](https://openairdocs.org/sdr/XGNA202404080002.md): Engine · power loss · Apr 6, 2024 · N236CH · Beech A36
  > DURING CLIMB A PARTIAL LOSS OF ENGINE POWER OCCURRED WITH FLUCTUATING MANIFOLD PRESSURE. ALL OTHER ENGINE PARAMETERS WERE NORMAL. PILOT RETURNED TO THE AIRPORT. MAGNETO DROPS WERE NORMAL.
- [SDR XGNA202404080001](https://openairdocs.org/sdr/XGNA202404080001.md): Engine · power loss · Apr 6, 2024 · N236CH · Beech A36
  > DURING CLIMB A PARTIAL LOSS OF ENGINE POWER OCCURRED WITH FLUCTUATING MANIFOLD PRESSURE. ALL OTHER ENGINE PARAMETERS WERE NORMAL. MAGNETO DROPS WERE NORMAL. PILOT RETURNED TO AIRPORT.
- [SDR 2024FA0000276](https://openairdocs.org/sdr/2024FA0000276.md): Rod · scored · Apr 2, 2024 · N5065
  > SCRATCHED AT THE ROD ASSY – PUSH AND ROCKER ASSEMBLY. THE SCORED CONDITIONS HAVE BEEN FOUND AFTER REPORTS OF: HIGH OIL TEMPERATURE, LOSS OF POWER, HIGH OIL CONSUMPTION
- [SDR 2024FA0000275](https://openairdocs.org/sdr/2024FA0000275.md): Rod · scored · Apr 2, 2024 · N2308
  > THE SCORED CONDITIONS HAVE BEEN FOUND AFTER REPORTS OF: HIGH OIL TEMPERATURE, LOSS OF POWER AND HIGH OIL CONSUMPTION ON THE O-540-J3A5D THE PLUNGER ASSEMBLY INSTALLED SHOWS DIFFERENT LENGTHS
- [SDR 2024FA0000258](https://openairdocs.org/sdr/2024FA0000258.md): Crankshaft · cracked · Mar 26, 2024 · N70392 · Cessna 172M
  > TOTAL INTERNAL CRANKSHAFT FAILURE AT CHEEK BETWEEN #3 AND #4 CONNECTING ROD JOURNALS CAUSING CRANKCASE TO COMPLETELY SEPARATE IN THE CENTER. CRACK APPEARS TO HAVE STARTED IN THE REAR THRUST RADIUS OF #3 CONNECTING ROD JOURNAL. PILOT HAD REPORTED ENGINE ROU
- [SDR HYIA20240221001](https://openairdocs.org/sdr/HYIA20240221001.md): Engine · failed · Feb 17, 2024 · N290CA · Cessna 402C
  > ON APPROACH PILOT NOTICED A SUDDEN "BANG" ACCOMPANIED BY SLIGHT POWER & RPM LOSS ON THE LEFT ENGINE. SMOKE AND OIL BEGAN COMING FROM LEFT ENGINE. OIL PRESSURE DROPPED AND PILOT SECURED THE ENGINE PER COMPANY PROCEDURES. INITIAL INSPECTION FOUND THE NUMBER 6 CY
- [SDR 2024FA0000772](https://openairdocs.org/sdr/2024FA0000772.md): Engine · power loss · Dec 30, 2023 · N678MJ · Blanca 1730A
  > TOTAL LOSS OF POWER AT 400 FEET AS I INITIATED MY LEFT PATTERN TURN OUT THE 2ND TIME. THE FIRST TIME WAS 2 WEEKS BEFORE, SAME THING EXCEPT I WAS AT 500 FEET. CONTACT INFORMATION IF MORE INFORMATION IS NEEDED.
- [SDR 2023FA0000662](https://openairdocs.org/sdr/2023FA0000662.md): Hose · deteriorated · Oct 23, 2023 · Piper PA24250
  > INFLIGHT HAD AN OIL COOLER HOSE FAILURE. RUBBER DETERIORATED. SHOULD HAVE A LIFE SPAN OF 10 YEARS.
- [SDR 2023FA0000615](https://openairdocs.org/sdr/2023FA0000615.md): Pipe · cracked · Oct 20, 2023 · N755EP
  > AT 255 HOURS SINCE NEW, INTAKE PIPE LW-14449 FAILED AND PIECES OF FLANGE WAS INGESTED CAUSING DAMAGE TO THE PISTON, RESULTING IN A CYLINDER/PISTON ASSY REPLACEMENT.
- [SDR 2023FA0000602](https://openairdocs.org/sdr/2023FA0000602.md): Rocker · damaged · Oct 18, 2023 · N9936V · Cessna 172M
  > LYCOMING FACTORY REBUILT - O-320-D2J, S/N RL-20892-39E. DURING ROUTINE MX. SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND 3EA HYDRUALIC TAPPETS P/N 15B21319, 3EA HYDRAULIC LIFTERS P/N 15B26066, 3EA ROCKER ARMS P/N 17F19357, 2EA PUSH RODS P/N 15F28835-10 & 1EA P
- [SDR 2023FA0000595](https://openairdocs.org/sdr/2023FA0000595.md): Unknown · unknown · Oct 12, 2023 · N629SA · Diamon DA42NG
  > DURING FINAL APPROACH, SIMULATED SINGLE ENGINE APPROACH, SIMULATED OPERATIVE ENGINE LOST FULL POWER WITH ECU A AND B FAIL. APPROX. 10 SECONDS LATER THE ENGINE SELF RESTARTED WITH CONSISTENT ECU A AND B FAIL, THOUGH PRODUCING POWER. DETERMINED FUEL LOAD TO BE T
- [SDR YV3R2023120100588](https://openairdocs.org/sdr/YV3R2023120100588.md): Governor · defective · Oct 5, 2023 · Robsin R44
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-9 WAS INOPERATIVE.
- [SDR 2023FA0000539](https://openairdocs.org/sdr/2023FA0000539.md): Rocker · damaged · Sep 14, 2023 · N9012H · Cessna 172M
  > LYCOMING FACTORY REBUILT O-320-D2J, S/N RL-20764-39E. DURING ROUTINE MX, SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND 7EA ROCKER ARMS P/N 17F19357, 1 EA PUSH ROD P/N 15F28835-09, 6EA PUSH RODS P/N 15F28835-10, 7EA TAPPET SOCKETS P/N 15B21319 & 7EA PLUNGERS P/
- [SDR 2023FA0000525](https://openairdocs.org/sdr/2023FA0000525.md): Rocker · damaged · Sep 6, 2023 · N3040K · Robsin R22BETAII
  > DURING ROUTINE MX LYCOMING SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND ALL LIFTERS P/N 15B26066, TAPPET SOCKETS P/N 15B21319, ROCKER ARMS P/N 17F19357, PUSH RODS P/N 15F28835-30 & PUSH RODS P/N 15F28835-29 TO HAVE MECHANICAL DAMAGE "HEAVY SCUFF - SCORING". L
- [SDR 2023FA0000543](https://openairdocs.org/sdr/2023FA0000543.md): Exhaust Valve · broken · Aug 29, 2023 · N5143U
  > PART OF THE EXHAUST VALVE HEAD BROKE OFF RESULTING IN COMPLETE ENGINE FAILURE AND LOSS OF AIRCRAFT.
- [SDR 2023FA0000470](https://openairdocs.org/sdr/2023FA0000470.md): Exhaust Valve · stuck · Aug 25, 2023 · N292WC · Piper PA28181
  > DURING DEPARTURE AIRCRAFT ENGINE SUDDENLY LOST SIGNIFICANT POWER. THE ENGINE WAS RUNNING ROUGH AND ABNORMAL VIBRATION/SOUND WAS ALSO PRESENT. THE CAUSE OF THE POWER LOSS WAS FOUND TO BE A STUCK EXHAUST VALVE ON CYLINDER #4 WHICH RESULTED IN THE EXHAUST VALVE P
- [SDR 2023FA0000467](https://openairdocs.org/sdr/2023FA0000467.md): Rocker · damaged · Aug 25, 2023 · N17HZ · Cessna 172M
  > LYCOMING FACTORY REBUILT O-320-D2J, TSN / TT: 2089.1. DURING ROUTINE MX, LYCOMING SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND 6EA VALVE PUSH RODS P/N 15F28835-10, 6EA ROCKERS P/N 17F19357 & 1EA TAPPET SOCKET P/N 15B21319 TO HAVE MECHANICAL DAMAGE (HEAVY SCU
- [SDR 2023FA0000431](https://openairdocs.org/sdr/2023FA0000431.md): Engine · mismanufactured · Aug 18, 2023 · N518BL · Diamon DA40NG
  > PILOT REPORTED THAT THERE WAS ENGINE ROUGHNESS AND VIBRATIONS DURING TAKEOFF, NOTICED MOST AROUND 700 FEET AGL. THEY ALSO REPORTED PROP OVERSPEED.
- [SDR 2023FA0000429](https://openairdocs.org/sdr/2023FA0000429.md): Pushrod · damaged · Aug 17, 2023 · N552LE · Robsin R22BETAII
  > DURING ROUTINE MX, LYCOMING SB388C (EXHAUST VALVE GUIDE INSPECTION). FOUND 7 OF 8 PUSH RODS, 7 OF 8 ROCKER ARMS, 7 OF 8 TAPPET SOCKETS & 7 OF 8 LIFTERS WITH MECHANICAL DAMAGE, "HEAVY SCUFF - SCORING". ALSO FOUND #3 CYLINDER WITH IMPROPERLY INSTALLED INTAKE VAL
- [SDR 2023FA0000427](https://openairdocs.org/sdr/2023FA0000427.md): Rocker · damaged · Aug 16, 2023 · N115L · Robsin R22BETAII
  > DURING ROUTINE MX, LYCOMING SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND 3 OF 4 EXHAUST PUSH RODS, ROCKER ARMS, TAPPET PLUNGERS & TAPPET SOCKETS TO HAVE MECHANICAL DAMAGE "HEAVY SCUFF - SCORING". LYCOMING FACTORY OVERHAULED O-360-J2A, S/N L-41989-36E, 7/20/20

Next page: https://openairdocs.org/jasc/8500/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 = '8500'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/8500/reports

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