# Service difficulty reports: JASC 8520 A list on [JASC 8520](https://openairdocs.org/jasc/8520.md). Reports filed under 8520 · Reciprocating Engine Power Section, newest first. Page 1 of 45 · 2,213 reports - [SDR 2026FA0000818](https://openairdocs.org/sdr/2026FA0000818.md): Drive Gear · spalled · Oct 6, 2026 · Cirrus SR22 > FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING, GALLING, AND CHIPPING OF THE GEAR TEETH. - [SDR 2026FA0000807](https://openairdocs.org/sdr/2026FA0000807.md): Drive Gear · spalled · Oct 1, 2026 · Cirrus SR22T > FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING, GALLING, AND CHIPPING OF THE GEAR TEETH. - [SDR 2026FA0000820](https://openairdocs.org/sdr/2026FA0000820.md): Drive Gear · spalled · Sep 24, 2026 · Cirrus SR22 > FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING, GALLING, AND CHIPPING OF THE GEAR TEETH. - [SDR 8TNC202609060001](https://openairdocs.org/sdr/8TNC202609060001.md): Case · cracked · Sep 6, 2026 · N81052 · Piper PA32301 > THIS ENGINE HAS BEEN REMOVED FROM SERVICE DUE TO A CRACK ON THE RT SIDE OF THE CASE BELOW THE NR 3 CYLINDER AT THE FORWARD LOWER CYLINDER HOLD DOWN NUT. CRACK STARTS FROM THE FORWARD LOWER CYLINDER HOLD DOWN NUT AND CONTINUES ABOUT 3 INCHES. ENGINE REMOVED F - [SDR 2026FA0000817](https://openairdocs.org/sdr/2026FA0000817.md): Drive Gear · spalled · Jul 15, 2026 · Cirrus SR22T > FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING AND GALLING OF THE GEAR TEETH. - [SDR 2026FA0000819](https://openairdocs.org/sdr/2026FA0000819.md): Drive Gear · spalled · Apr 29, 2026 · Cirrus SR22T > FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING AND GALLING OF THE GEAR TEETH. - [SDR 8HBR20260426081](https://openairdocs.org/sdr/8HBR20260426081.md): Plug · worn · Apr 23, 2026 · N89312 · Cessna 152 > WHILE COMPLYING WITH LYCOMING SB667A, ONE WRIST PIN PLUG ON CYLINDER #2 WAS FOUND EXCESSIVELY WORN WITH A HOLE IN THE CENTER OF THE PLUG - [SDR 2026FA0000214](https://openairdocs.org/sdr/2026FA0000214.md): Bushing Sleeve · migrated · Mar 25, 2026 · N1470 · Cessna 172M > FOUND BRONZE PARTICLES IN FULL FLOW FILTER AT INSPECTION. TRACED TO MIGRATING CONNECTING ROD BUSHINGS ON ALL 4 RODS - [SDR NX422026031600013](https://openairdocs.org/sdr/NX422026031600013.md): Crankcase · gouged · Mar 13, 2026 · N923ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANKCASE HALF ON ALL FOUR THRU STUD BORE LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PADS JUST INSIDE THE THRU STUD BORES. SIMILAR DAMAGE O - [SDR NX422026031600012](https://openairdocs.org/sdr/NX422026031600012.md): Stud · damaged · Mar 13, 2026 · N979ER · Cessna 172S > UPON DISASSEMBLY FOR IT'S FIRST OVERHAUL, DAMAGE WAS FOUND ON ONE OF THE THRU STUDS. THE DAMAGE APPEARS TO BE DIPLSACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUD. A RELEVANT INDICATION IS SEEN UNDER MAGNETIC PARTICLE INSPECTION. THE LEF - [SDR NX422026031600011](https://openairdocs.org/sdr/NX422026031600011.md): Crankcase · gouged · Mar 13, 2026 · N979ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANKCASE HALF TO THREE THRU STUD BORE LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PADS JUST INSIDE THE THRU STUD BORES. SIMILAR DAMAGE ON O - [SDR HYIA20260327008](https://openairdocs.org/sdr/HYIA20260327008.md): Crankcase · cracked · Feb 27, 2026 · N843CA · Tecnam P2012 > DURING INSPECTION, WHILE TROUBLESHOOTING AN OIL LEAK, A CRACK FOUND IN THE ENGINE CRANK CASE. THE ENGINE WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR NX422026022700010](https://openairdocs.org/sdr/NX422026022700010.md): Stud · displaced · Feb 24, 2026 · N964ER · Cessna 172S > UPON DISASSEMBLY FOR IT'S FIRST OVERHAUL, DAMAGE WAS FOUND ON ONE OF THE THRU STUDS. THE DAMAGE APPEARS TO BE DISPLACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUD. THE DAMAGE IS MINOR BUT DUE TO THE SIMILAR LOCATION AND SEVERITY OF THE D - [SDR NX422026022700009](https://openairdocs.org/sdr/NX422026022700009.md): Crankcase · gouged · Feb 24, 2026 · N964ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE TO ONE THRU STUD LOCATION. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORE. SIMILAR DAMAGE ON OTHER ENGINES WAS PREV - [SDR NX422026021800008](https://openairdocs.org/sdr/NX422026021800008.md): Stud · displaced · Feb 17, 2026 · N909ER · Cessna 172S > UPON DISASSEMBLY FOR IT'S FIRST OVERHAUL, DAMAGE WAS FOUND ON 2 OF THE THRU STUDS. THE DAMAGE APPEARS TO BE DISPLACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUD. THE DAMAGE IS MINOR BUT DUE TO THE SIMILAR LOCATION AND SEVERITY OF THE DAM - [SDR NX422026021800007](https://openairdocs.org/sdr/NX422026021800007.md): Crankcase · gouged · Feb 17, 2026 · N909ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE TO ALL 4 THRU STUD LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORE. ON THREE OF THE THRU STUD BORES THE D - [SDR NX422026021800006](https://openairdocs.org/sdr/NX422026021800006.md): Stud · displaced · Feb 16, 2026 · N934ER · Cessna 172S > UPON DISASSEMBLY FOR IT'S FIRST OVERHAUL, DAMAGE WAS FOUND ON 1 OF THE THRU STUDS. THE DAMAGE APPEARS TO BE DISPLACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUD. THE DAMAGE IS MINOR BUT DUE TO THE SIMILAR LOCATION AND SEVERITY OF THE DAM - [SDR NX422026021800005](https://openairdocs.org/sdr/NX422026021800005.md): Crankcase · gouged · Feb 16, 2026 · N934ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE TO ALL 4 THRU STUD LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORE. IN ADDITION, 1 OF THE THRU STUDS HAVE - [SDR NX422026020600004](https://openairdocs.org/sdr/NX422026020600004.md): Stud · displaced · Feb 2, 2026 · N958ER · Cessna 172S > UPON DISASSEMBLY FOR IT'S FIRST OVERHAUL, DAMAGE WAS FOUND ON 2 OF THE THRU STUDS. THE DAMAGE APPEARS TO BE DISPLACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUDS. THE DAMAGE APPEARS TO BE VERY MINOR BUT DUE TO THE SIMILAR LOCATION AND SE - [SDR NX422026020600003](https://openairdocs.org/sdr/NX422026020600003.md): Crankcase · gouged · Feb 2, 2026 · N958ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE TO THE UPPER MIDDLE FLOATING THRU STUD LOCATION. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORE. IN ADDITION, 2 OF - [SDR NX422026020600001](https://openairdocs.org/sdr/NX422026020600001.md): Crankcase · gouged · Feb 2, 2026 · N963ER · Cessna 172S > UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE ON ALL 4 OF THE FLOATING THRU STUD LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORES. IN ADDITION, 2 OF TH - [SDR NX422026020600002](https://openairdocs.org/sdr/NX422026020600002.md): Stud · displaced · Feb 2, 2026 · N963ER · Cessna 172S > ON DISASSEMBLY FOR ITS 1ST OVERHAUL, DAMAGE FOUND ON 2 OF THRU STUDS. DAMAGE APPEARS TO BE DISPLACED STEEL UNDER THREADED PORTION ON SHOULDER OF THRU STUDS. ON 1 THRU STUD. DAMAGE IS SEVERE WITH DISPLACED METAL FROM SMALLER NECKED DOWN PORTION OF STUD UP TO - [SDR 2025FA0000775](https://openairdocs.org/sdr/2025FA0000775.md): Crankcase · gouged · Nov 20, 2025 · N957ER > DURING DISASSEMBLY OF THE ENGINE FOR OVERHAUL DAMAGE WAS FOUND ON THE LEFT CRANKCASE HALF AT EACH OF THE 4 THRU STUD CYLINDER PAD LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE DISPLACING SOME OF THE ALUMINUM CRANKCASE PAD DOWN INTO EACH OF THE THRU STUD BORE LOC - [SDR HYIA20260327003](https://openairdocs.org/sdr/HYIA20260327003.md): Case · cracked · Nov 5, 2025 · N508CA · Tecnam P2012 > DURING TROUBLESHOOTING FOR AN OIL LEAK DURING SCHEDULED INSPECTION, A CRACK IN THE ENGINE CASE WAS FOUND IN THE AREA OF THE #1-CYLINDER BOTTOM MOUNT. THIS ENGINE WAS REPLACED WITH NO FURTHER ISSUES. - [SDR 2025FA0000457](https://openairdocs.org/sdr/2025FA0000457.md): Piston · cracked · Jul 8, 2025 · Cessna 172G > HIGH OIL CONSUMPTION REPORTED. BORESCOPE INSPECTION REVEALED PISTON DAMAGE. CYLINDER REMOVED AND FOUND PISTON CRACKED AND SEPARATED IN HALF. INSPECTION OF ENGINE INTERIOR REVEALED SUSPICIOUS PISTON ON OPPOSING CYLINDER. REMOVED CYLINDER AND FOUND CRACK FORMING - [SDR 2025FA0000409](https://openairdocs.org/sdr/2025FA0000409.md): Crankcase · cracked · Jun 18, 2025 · N3080E · Cessna 172N > CASE CRACKED AT TOP BASE OF #2 CYLINDER, LEAKING OIL - [SDR 2025FA0000383](https://openairdocs.org/sdr/2025FA0000383.md): Camshaft · gouged · Jun 3, 2025 · N486W · Cirrus SR22T > AN UNACCEPTABLE OIL SAMPLE LEAD TO A RECOMMENDATION BY AN OUTSIDE COMPANY TO HAVE AN INSPECTION OF THE CAMSHAFT AND LIFTERS PERFORMED. WE PERFORMED THESE INSPECTIONS AND FOUND A GOUGE ON THE #6 INTAKE LOBE ON THE CAMSHAFT. A PICK CAN BE CAUGHT IN THIS GOUGE TH - [SDR N3XR202505230001](https://openairdocs.org/sdr/N3XR202505230001.md): Piston · cracked · May 21, 2025 · N316ER · Diamon DA42 > WHEN COMPLYING WITH AD2024-19-10 / MSB-E4-043 (RTBORESCOPE) INSPECTION, THE #2 PISTON WAS FOUND CRACKED. - [SDR N3XR20250507001](https://openairdocs.org/sdr/N3XR20250507001.md): Piston · cracked · May 2, 2025 · N313ER · Diamon DA42 > WHILE COMPLYING WITH AD2024-19-10 / MSB-E4-043 (RTBORESCOPE INSPECTION), THE #2 PISTON ON THE RIGHT ENGINE WAS FOUND CRACKED. THE ENGINE WAS REPLACED. - [SDR 2025FA0000113](https://openairdocs.org/sdr/2025FA0000113.md): Connecting Rod · binding · Jan 23, 2025 · N623ES · Cirrus SR22 > DURING FLIGHT THE AIRCRAFT OWNER/OPERATOR NOTICED A DRONING VIBRATION AT CRUISE. UPON LANDING, ALL CYLINDERS WERE INSPECTED AND BORE-SCOPED. MOVED PROPELLER BACK AND FORTH AND HEARD A CLUNKING NOISE, NARROWED DOWN TO CYLINDER #2 PISTON SHOWING SIGNS OF EXCESSI - [SDR 2025FA0000000](https://openairdocs.org/sdr/2025FA0000000.md): Nut · damaged · Jan 3, 2025 > NHDO ASSEMBLING COMCC??NG RODS TO CRANKSHAFT DURING OVERHAUL. II WAS NOTICED THAT T NUT WAS NOT SLMNG FLUSH TO ITS BEARING SURFACE. THE NUT HAD BEEN RUN DOWN FINGER TIGHT, PRIOR TO TORQUING LOOKING AT THO NUT, 1T IS OBVIOUS THAT THO NUT WAS NOT 1N THE PROPER O - [SDR 2024FA0000979](https://openairdocs.org/sdr/2024FA0000979.md): Crankcase · damaged · Dec 15, 2024 · N41148 · Piper PA31350 > AT CRUISE ALTITUDE, AN OIL PRESSURE FLUCTUATION WAS OBSERVED ON NO.1 ENGINE INSTRUMENTS. ALSO NOTICED A SMALL OIL STREAK ON NO. 1 ENGINE COWL. DECISION WAS IMMEDIATELY MADE TO RETURN TO BASE, FOR FURTHER INVESTIGATION BY ENGINEERS. - [SDR 7L7R2024102100779](https://openairdocs.org/sdr/7L7R2024102100779.md): Piston · damaged · Oct 6, 2024 · N946L > ECU A AND B FAIL DURING INITIAL CLIMB, AND SIGNIFICANT LOSS OF POWER. DURING SUBSEQUENT BORESCOPE INSPECTION FOUND A HOLE IN THE #3 PISTON. PREVIOUS BORESCOPE INSPECTION WAS PERFORMED @ 787.4 ETSN. - [SDR N3XR20240903004](https://openairdocs.org/sdr/N3XR20240903004.md): Piston · cracked · Aug 30, 2024 · N311ER · Diamon DA42NG > DURING THE BORESCOPE INSPECTION REQUIRED BY DIAMOND MSB-E4-043, THE #2 PISTON IN THE LEFT ENGINE WAS FOUND CRACKED. - [SDR N3XR20240903003](https://openairdocs.org/sdr/N3XR20240903003.md): Piston · cracked · Aug 30, 2024 · N304ER · Diamon DA42NG > DURING THE BORESCOPE INSPECTION REQUIRED BY DIAMOND MSB-E4-043, THE #4 PISTON IN THE RIGHT ENGINE WAS FOUND CRACKED. - [SDR N3XR20240903002](https://openairdocs.org/sdr/N3XR20240903002.md): Piston · cracked · Aug 30, 2024 · N304ER · Diamon DA42NG > DURING THE BORESCOPE INSPECTION REQUIRED BY DIAMOND MSB-E4-043, THE #4 PISTON IN THE RIGHT ENGINE WAS FOUND CRACKED. - [SDR N3XR202409030001](https://openairdocs.org/sdr/N3XR202409030001.md): Piston · cracked · Aug 30, 2024 · N304ER · Diamon DA42NG > DURING THE BORESCOPE INSPECTION REQUIRED BY DIAMOND MSB-E4-043/0 THE #3 PISTON WAS FOUND CRACKED. - [SDR N3XR202408290316](https://openairdocs.org/sdr/N3XR202408290316.md): Piston · cracked · Aug 29, 2024 · N316ER · Diamon DA42NG > WHILE PERFORMING THE INSPECTION OF DIAMOND MSB-E4-043 ENGINE (BORESCOPE INSPECTION) ON THE RIGHT ENGINE, THE PISTON IN CYLINDER #1 WAS FOUND CRACKED ON THE CROWN. - [SDR 2024FA0000628](https://openairdocs.org/sdr/2024FA0000628.md): Nut · missing · Aug 15, 2024 · N288BL · Piper PA28181 > FORWARD MOST THROUGH CASE BOLT BEHIND CRANKSHAFT SEAL AND #1 MAIN BEARING, TOP STUD AND NUT MISSING. BOTTOM BOLT AND NUT LOOSE. LYCOMING WANTED ENGINE BACK IN CASE MAIN BEARING SPUN. - [SDR 2024FA0000594](https://openairdocs.org/sdr/2024FA0000594.md): Lifter · corroded · Aug 13, 2024 > RECEIVED FACTORY REMANUFACTURED TSIO520 R9B FROM CAT. PRIOR TO REMOVING THE ENGINE FROM THE SHIPPING CRATE A PITTED AND MARRED LIFTER WAS DISCOVERED. ENGINE SN 1046657. CAT RETURNED THAT ENGINE AND SENT ME A REPLACEMENT ENGINE SN 1047255. PRIOR TO INSTALLA - [SDR 2024FA0000568](https://openairdocs.org/sdr/2024FA0000568.md): Flywheel · fragmented · Aug 6, 2024 · N366L > DUAL ECU FAIL AND POWER LOSS IN FLIGHT. FOUND FLYWHEEL FAILURE WHICH APPEARS TO HAVE STARTED WITH SPRING FAILURE. - [SDR 2024FA0000435](https://openairdocs.org/sdr/2024FA0000435.md): Case · cracked · Jun 7, 2024 · N15871 · Piper PA28180 > ON CLIMB TO CRUISING ALTITUDE PIC FELT AN ENGINE VIBRATION AND DECIDED TO TURN BACK TO KARG. ON TURN BACK TO DEPARTURE AIRPORT OIL PRESSURE DROPPED TO "0" AND ENGINE SEIZED. POST EMERGENCY LANDING, ENGINE COWLING WAS REMOVED, HOLE IN CRANKCASE FOUND ON FORWARD - [SDR N3XR202406120001](https://openairdocs.org/sdr/N3XR202406120001.md): Piston · cracked · Jun 4, 2024 · N316ER · Diamon DA42 > LEFT ENGINE POWER HAD 3% & RPM(100RPM) FLUCTUATION. VISIBLE ENGINE OIL LEAKING OUT OF AIR OUTLETS. DIVERTED TO XXXX ON THE GROUND, POWER 10%FLUCTUATION RPM. INVESTIGATION REVEALED THAT THE #3 PISTON WAS CRACKED AND A HOLE HAD DEVELOPED AT THE 3 O'CLOCK POSITIO - [SDR 2024FA0000422](https://openairdocs.org/sdr/2024FA0000422.md): Connecting Rod · failed · Jun 4, 2024 · N522RK · Cirrus SR22T > ENGINE WAS DISASSEMBLED FOR INSPECTION DUE TO PROPELLER STRIKE. UPON DISASSEMBLY IT WAS NOTED THAT THE CONNECTING ROD BUSHING HAS MIGRATED PARTLY OUT OF THE BORE ON THE SMALL END OF CONNECTING ROD #2, #3, & #5. THIS IS THE THIRD TIME THAT WE HAVE SEEN THIS P - [SDR 2024FA0000141](https://openairdocs.org/sdr/2024FA0000141.md): Rod Bolt · sheared · Feb 9, 2024 · N517BL · Diamon DA40NG > UNUSUAL CLANGING SOUNDS HEARD DURING A TRAINING FLIGHT. IMMEDIATELY TURNED TO BASE AND GAINED ALTITUDE TO ASSURE SAFE LANDING AT JNX. AFTER 2 MILES, A DUAL ECU FAIL BECAME ACTIVE DUE TO LOW OIL PRESSURE. CONTINUED FLIGHT AT IDLE. AT 3 MILES FROM BASE, OIL PRES - [SDR 2024FA0000140](https://openairdocs.org/sdr/2024FA0000140.md): Bolt · sheared · Feb 8, 2024 · N517BL · Diamon DA42NG > SIGNIFICANT OIL LOSS AND LOSS OF OIL PRESSURE ON TAKEOFF. FADEC SYSTEM AUTOMATICALLY SHUT DOWN ENGINE DUE TO OIL PRESSURE LOSS. PILOT LANDED SAFELY ON RUNWAY AND TAXIED OFF OF ACTIVE RUNWAY WITHOUT ISSUES. UPON VISUAL INSPECTION, FOUND THERE TO BE A 2 IN DIAME - [SDR N3XR202401160001](https://openairdocs.org/sdr/N3XR202401160001.md): Piston · cracked · Jan 11, 2024 · N304ER · Diamon DA42 > ON TAKE-OFF, THE CREW NOTICED A LOW OIL PRESSURE INDICATION VIA A WARNING ON THE G1000 FOR THE RIGHT ENGINE. AN EMERGENCY WAS DECLARED AND THE CREW LANDED SUCCESSFULLY. AN INSPECTION OF THE RIGHT ENGINE REVEALED OIL COVERING THE RIGHT WING ON BOTH SIDES OF THE - [SDR 2024FA0000003](https://openairdocs.org/sdr/2024FA0000003.md): Rocker Boss · broken · Jan 3, 2024 · Mooney M20TN > PILOT REPORTED SUDDEN VIBRATION IN FLIGHT, FOLLOWED BY LOSS OF CHT/EGT ON CYLINDERS #1, #3, #5, AND LOSS OF ENGINE OIL PRESSURE. AFTER LANDING AND REMOVING ENGINE COWLING IT WAS DISCOVERED THAT THE #3 CYLINDER EXHAUST ROCKER ARM SHAFT MOUNT STRUCTURE HAD BROK - [SDR 2023FA0000854](https://openairdocs.org/sdr/2023FA0000854.md): Piston · broken · Dec 22, 2023 · N445L · Diamon DA40NG > THE AIRCRAFT WAS IN CRUISE AT APPROXIMATELY 7500’ WHEN THEY EXPERIENCED SOME ENGINE ROUGHNESS, A LOSS OF OIL PRESSURE AND THE ENGINE QUIT. THEY LANDED AT THE GEORGETOWN, SC AIRPORT AT APPROXIMATELY 5:30PM. MAINTENANCE FOUND OIL ON THE AIRCRAFT, A HOLE IN THE S - [SDR 2023FA0000837](https://openairdocs.org/sdr/2023FA0000837.md): Pushrod · damaged · Dec 16, 2023 · N734BB · Cessna 172N > DURING SB388C, EXHAUST VALVE GUIDE INSPECTION FOUND 4EA PUSH RODS P/N 15F28835-10 & 4EA ROCKERS P/N 17F19357 TO HAVE HEAVY SCUFF - SCORING. ENGINE TT: 2741.1 SINCE FACTORY REBUILT. Next page: https://openairdocs.org/jasc/8520/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 = '8520' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/jasc/8520/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.