# Service difficulty reports: Continental IO-550-N

A list on [Continental IO-550-N](https://openairdocs.org/engine/continental-io-550-n.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 7 · 335 reports

- [SDR 2026FA0000818](https://openairdocs.org/sdr/2026FA0000818.md): Drive Gear · spalled · Oct 6, 2026 · Cirrus SR22 · Reciprocating Engine Power Section
  > 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 2026FA0000796](https://openairdocs.org/sdr/2026FA0000796.md): Lock Tab · misinstalled · Sep 30, 2026 · N621K · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > 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 2026FA0000820](https://openairdocs.org/sdr/2026FA0000820.md): Drive Gear · spalled · Sep 24, 2026 · Cirrus SR22 · Reciprocating Engine Power Section
  > 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 EVGR20260720001](https://openairdocs.org/sdr/EVGR20260720001.md): Pump · leaking · Jul 1, 2026 · N6153Z · Cessna U206G · Fuel Boost Pump
  > DURING A POST FLIGHT INSPECTION THE PILOT OBSERVED BLUE STAINS ON THE BACK OF THE ENGINE DRIVEN FUEL PUMP. FUEL WAS FOUND TO BE SEEPING FROM THE SMALL WEEP HOLE ON THE PUMP NEAR THE UNMETERED FUEL PRESSURE ADJUSTER SCREW. THIS PUMP WAS REMOVED FROM SERVICE A
- [SDR 2026FA0000597](https://openairdocs.org/sdr/2026FA0000597.md): Engine · failed · Apr 16, 2026 · N93021 · Cessna U206F · Engine (Reciprocating)
  > COMPLETE LOSS OF POWER IN CRUISE FLIGHT, AIRCRAFT WAS DITCHED AND UNRECOVERABLE.
- [SDR 2026FA0000210](https://openairdocs.org/sdr/2026FA0000210.md): Alternator · failed · Mar 13, 2026 · N993MM · Cirrus SR22 · DC Generator-Alternator
  > FACTORY NEW ALTERNATOR SUDDENLY FAILED AFTER ONE MONTH AND 52 FLIGHT HOURS SINCE INSTALLATION. FAILURE OCCURRED IN CRUISE FLIGHT RESULTING IN A TOTAL ELECTRICAL POWER LOSS TO THE MAIN AIRCRAFT BATTERY. THIS NECESSITATED A PROMPT DIVERSION AND UNSCHEDULED LANDI
- [SDR 2026FA0000052](https://openairdocs.org/sdr/2026FA0000052.md): Spark Plug · cracked · Nov 23, 2025 · N77541 · Piper J3C65 · Fuel Control/Turbine Engines
  > LEVELED AT 4000FT, ENGINE POWER WAS REDUCED TO 80% WITH FUEL CONSUMPTION LEANED TO 17GAL/HR. AFTER BEING SET IN THIS CRUISE PROFILE FOR APPROXIMATELY 2 MINUTES, THE ENGINE BEGAN TO RUN ROUGH. THE PILOT THEN RICHENED THE MIXTURE WHICH DID NOT FIX THE ISSUE, HE
- [SDR 2025FA0000529](https://openairdocs.org/sdr/2025FA0000529.md): Filter · melted · Jul 18, 2025 · Cirrus SR22T · Magneto/Distributor
  > PRESSURIZED MAGNETO AIR SOURCE FILTER MELTED/DEFORMED AFTER ONLY 79H AFTER INSTALLATION. BLOCKAGE OF AIR TO MAGNETO CAUSED LEFT MAGNETO FAILURE, WHICH WAS ALSO JUST 79H AFTER REPLACEMENT. PROBLEM SEEMS TO OCCUR FREQUENTLY WITH THAT FILTER INSTALLATION IN SR22
- [SDR 2025FA0000408](https://openairdocs.org/sdr/2025FA0000408.md): Oil Cooler · cracked · Jun 18, 2025 · N603DK · Cirrus SR22 · Engine Oil Cooler
  > WHILE PERFORMING AN OIL CHANGE, IT WAS DISCOVERED THE DIAGONAL STIFFENERS ON BOTH SIDES OF THE OIL COOLER WERE BROKEN AND HALF GONE. THE OIL COOLER WAS NOT LEAKING. THE OIL COOLER WAS REPLACED WITH NEW. INSTALLED PART NUMBER: 658767, SERIAL NUMBER: H22-12342-2
- [SDR 2025FA0000445](https://openairdocs.org/sdr/2025FA0000445.md): Rheostat · unknown · Jun 5, 2025 · N556CE · Cirrus SR22 · Electrical Power System
  > AIRCRAFT IS A CIRRUS SR22 WITH THE GARMIN PERSPECTIVE AVIONICS SUITE CONSISTING OF 2 GARMIN 1000 DISPLAYS SERVING AS A PFD & MFD. PILOT REPORTS THAT WHILE FLYING ON AN IFR FLIGHT PLAN BOTH THE PFD & MFD WENT COMPLETELY BLACK & UNREADABLE. AUTOPILOT REMAINED EN
- [SDR 2025FA0000282](https://openairdocs.org/sdr/2025FA0000282.md): Cylinder Head · cracked · Apr 21, 2025 · N214TW · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > CRACKS / SEPARATION OF CYLINDER EVEN AFTER COMPLYING WITH AD 2020-16-11 OVER 5 YEARS AGO.
- [SDR 2025FA0000113](https://openairdocs.org/sdr/2025FA0000113.md): Connecting Rod · binding · Jan 23, 2025 · N623ES · Cirrus SR22 · Reciprocating Engine Power Section
  > 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 2025FA0000010](https://openairdocs.org/sdr/2025FA0000010.md): Cylinder Head · burned · Jan 8, 2025 · N220AM · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > ENGINE COMPRESSION CHECK CYLINDER #5 WAS 10/80 PSI. REMOVED CYLINDER, PISTON WAS BURNED BADLY AROUND THE OUTSIDE EDGES. TOP SPARK PLUG PORCELAIN WAS BROKEN AND DAMAGED.
- [SDR 2024FA0000961](https://openairdocs.org/sdr/2024FA0000961.md): Cylinder · cracked · Dec 13, 2024 · N681S · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > I PREVIOUSLY REPORTED THIS CYLINDER FOR A LOOSE VALVE GUIDE (CONTROL # 2024FA0000818). UPON FURTHER INSPECTION, THIS CYLINDER IS ALSO CRACKED IN THE TARGET AREA OF AD20-16-11. CRACK CONFIRMED BY 10X MAGNIFIER AND FLORESCENT PENETRANT INSPECTION. THIS CYLINDER
- [SDR 2024FA0000818](https://openairdocs.org/sdr/2024FA0000818.md): Valve Guide · loose · Nov 6, 2024 · N681S · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > PILOT REPORTED AN UNUSUAL VIBRATION DEVELOPING IN FLIGHT BETWEEN 2200-2400 RPM. I FOUND THE #5 CYLINDER EXHAUST VALVE GUIDE, PN: 636242P005, WAS LOOSE, FLOATING IN THE CYLINDER. LOGBOOKS INDICATE THE #5 CYLINDER WAS AN OVERHAULED CYLINDER. THE CYLINDER WAS O
- [SDR 2024FA0000777](https://openairdocs.org/sdr/2024FA0000777.md): Drive Shaft · damaged · Oct 19, 2024 · N267PK · Cirrus SR22 · Water Injection System
  > AC DRIVE ASSEMBLY, CIRRUS PN: 21119-102, ALSO PN: 1133180-4. THE 4 BOLTS, THAT WERE ALSO SAFETY WIRED, ALL SHEERED OFF IN FLIGHT, CAUSING THE AC DRIVE SHAFT TO BACK OUT, RESULTING IN HEAVY DAMAGE TO THE AC DRIVE ASSEMBLY. NO ENGINE ROUGHNESS FROM THE PILOT WA
- [SDR 2024FA0000677](https://openairdocs.org/sdr/2024FA0000677.md): Engine · blown · Aug 21, 2024 · N452TX · Cirrus SR22 · Engine (Reciprocating)
  > 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 2025FA0000380](https://openairdocs.org/sdr/2025FA0000380.md): Screw · sheared · Jun 16, 2024 · N5695S · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > PILOT WAS FLYING WHEN THE ENGINE STARTED SHAKING AND CYLINDER 1 CHT AND EGT WENT COLD. PILOT DECLARED AN EMERGENCY AND LANDED AT KRDG. UPON REMOVAL OF THE COWLING THE INSPECTOR NOTED THERE WAS A HOLE PUNCTURED IN THE CYLINDER #1 ROCKER COVER. IT APPEARS ONE
- [SDR 2024FA0000367](https://openairdocs.org/sdr/2024FA0000367.md): Cylinder Head · cracked · May 13, 2024 · N615EM · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > CYLINDERS 1, 3 AND 5 EXHIBIT CRACKS IDENTICAL TO SDR MSB09-1B, ALTHOUGH THEY ARE NOT INCLUDED IN THE SERVICE BULLETIN. CYLINDER PNS ARE UNREADABLE BUT SNS ARE AS FOLLOWS: • CYLINDER 1 - ACO6CA702, CYLINDER 2 - AC04HC272, CYLINDER 3 - AC05BB268, CYLINDER 4 - AC
- [SDR 2024FA0000370](https://openairdocs.org/sdr/2024FA0000370.md): Pulley · damaged · May 2, 2024 · N818AB · Cirrus SR22 · Cabin Cooling System
  > AIR CONDITIONING COMPRESSOR DRIVE PULLEY SHEARED OFF BOLT, IMPACTED ALTERNATOR #2, DAMAGED ALTERNATOR #2 TO THE POINT THAT IT WAS INOP. COULD NOT LOCATE BOLT OR SAFETY WIRE.
- [SDR 2024FA0000343](https://openairdocs.org/sdr/2024FA0000343.md): Control Unit · burned · Apr 27, 2024 · N75MG · Cirrus SR22 · Electrical Power System
  > COMPLETE ELECTRICAL FAILURE EN-ROUTE FROM KGTF TO 6S8. STARTED WITH ATC REPORTING MODE C FAILURE; RECYCLED TRANSPONDER. ATC UNABLE TO RECEIVE MODE C; AVIONICS POWER RECYCLE. PANEL LIGHTS FLASHED, GPS/MFD/PFD FLICKERED. BATTERY AND ALTERNATOR GAUGES OK FOR APPR
- [SDR 2024FA0000297](https://openairdocs.org/sdr/2024FA0000297.md): Mcu · failed · Apr 4, 2024 · N220CD · Cirrus SR22 · Electrical Power System
  > AIRCRAFT WAS TAKEN ON MAINTENANCE TEST FLIGHT AFTER ENGINE INSTALLATION. UPON THE SECOND TOUCH-AND-GO, AIRCRAFT LOST ELECTRICAL POWER ON CLIMB OUT AFTER A TOUCH-AND-GO FROM MSO AIRPORT. BOTH ALTERNATORS INDICATED AS NO LONGER FUNCTIONING, AND MAIN BATTERY VOLT
- [SDR 2024FA0000306](https://openairdocs.org/sdr/2024FA0000306.md): Mcu · failed · Apr 4, 2024 · N220CD · Cirrus SR22 · Electrical Power System
  > AIRCRAFT WAS TAKEN ON MAINTENANCE TEST FLIGHT AFTER ENGINE INSTALLATION. UPON THE SECOND TOUCH-AND-GO, AIRCRAFT LOST ELECTRICAL POWER ON CLIMB OUT AFTER A TOUCH-AND-GO FROM MSO AIRPORT. BOTH ALTERATORS INDICATED AS NO LONGER FUNCTIONING, AND MAIN BATTERY VOLTA
- [SDR EVGR2024040900001](https://openairdocs.org/sdr/EVGR2024040900001.md): Piston Ring · stuck · Jan 8, 2024 · N67JA · Cessna U206G · Reciprocating Engine Cylinder Section
  > BETWEEN 24 & 49 HRS OIL CONSUMPTION WAS 8.7 HRS/QT. OIL CONSUMPTION WAS LOWEST AT 10 HRS PER QUART AT 240 HRS AND THEN INCREASED. AT 370 HRS IT WAS 6 HRS/QT. AT 513 HOURS WAS 4.4 HRS/QT. AT 567 HRS (100HR INSP) IT WAS 2.1 HRS/QT OVER 50 HOURS BUT WAS INCREASIN
- [SDR 2023F00233](https://openairdocs.org/sdr/2023F00233.md): Unknown · unknown · Jul 20, 2023 · N953A · Cirrus SR22 · Standard Practices/Structures
  > ON 7/20/2023, VAN NUYS AIRLINES-VNY- DBA, AD AIRLINES' CAPTAIN REPORTED: "WE HAD SMOKE IN THE CABIN AROUND 17 MILES AWAY FROM KHFD. WE HAD THE AIR CONDITIONING ON FROM BEING ON THE GROUND AT KGON. WE SMELT SMOKE THEN A COUPLE OF SECONDS LATER WE SAW SMOKE COMI
- [SDR E5ZR202308070001](https://openairdocs.org/sdr/E5ZR202308070001.md): Crankshaft · rusted · Jul 17, 2023 · N222YY · Cirrus SR22 · Reciprocating Engine Power Section
  > CONTINENTAL SUPPLIED, UNDER WARRANTY, A NEW REPLACEMENT CRANKSHAFT ASSEMBLY P/N: 649900 S/N: N23BA108 (8130-3 DATED 02/JUN/2023) TO REPLACE A PREVIOUSLY SUPPLIED NEW CRANKSHAFT ASSEMBLY. THE S/N: N23BA108 CRANKSHAFT (#2) WAS SUPPLIED BY CMI BECAUSE IT WAS FO
- [SDR 2023FA0000374](https://openairdocs.org/sdr/2023FA0000374.md): Crankshaft · corroded · Jul 14, 2023 · N222Y · Cirrus SR22 · Engine (Reciprocating)
  > CONTINENTAL SUPPLIED, UNDER WARRANTY, A NEW REPLACEMENT CRANKSHAFT ASSEMBLY P/N: 649900 S/N: N23BA108 (8130-3 DATED 02/JUN/2023) TO REPLACE A PREVIOUSLY SUPPLIED NEW CRANKSHAFT ASSEMBLY. THE S/N: N23BA108 CRANKSHAFT (#2) WAS SUPPLIED BY CMI BECAUSE IT WAS F
- [SDR 2023FA0000276](https://openairdocs.org/sdr/2023FA0000276.md): Mount · destroyed · May 17, 2023 · N2275T · Cirrus SR22 · Reciprocating Engine Supercharger
  > DEPARTED TETERBORO LATE AT NIGHT. WHILE ENROUTE NOTICED A REDUCTION IN MANIFOLD PRESSURE CONSISTENT WITH A SUPERCHARGER BELT FAILURE. RECONFIGURED FOR NORMALLY ASPIRATED OPERATION AND LANDED AT BRIDGEPORT. REMOVED THE ENGINE COWLING TO INSPECT THE SUPERCHARGER
- [SDR 2022FA0000678](https://openairdocs.org/sdr/2022FA0000678.md): Nut · loose · Nov 9, 2022 · N360CD · Cirrus SR22 · Nose/Tail Landing Gear
  > SEE ATTACHED IPC 32-20-02 COTTER PIN ITEM 123. PAGE 2 19 SEP 2017. CD MM INSTALLATION NOTES REDUCE THE POSSIBLE SHEAR FACTOR ON A "EDGE" OF THE PIN, SEE MM32-20 PAGE 28 (5) (G) AND FIGURE 32-206 (ATTACHED). AIRCRAFT RECEIVED FOR ANNUAL INSPECTION, DURING
- [SDR 2022FA0000217](https://openairdocs.org/sdr/2022FA0000217.md): Mount · cracked · Apr 19, 2022 · N242M · Cirrus SR22 · Engine Mount Section
  > ENGINE MOUNT TRUSS ASSEMBLY HAS CRACKS APPROXIMATELY HALF WAY THROUGH THE BOTTOM TRUSS TUBE AT THE JUNCTION FOR THE MID-SPAN DOWN TUBE WELDS. THE CRACKS ARE PRESENT ON BOTH SIDES OF THE LOWER TRUSS (INBD AND OUTBD).
- [SDR 2022FA0000165](https://openairdocs.org/sdr/2022FA0000165.md): Drive Shaft · cracked · Mar 23, 2022 · N75MG · Cirrus SR22 · Reciprocating Engine Rear Section
  > LH MAGNETO DRIVE SHAFT FOUND CRACKED 3/4 OF THE LENGTH OF THE DRIVE SHAFT. THIS MAGNETO DRIVE OPERATES THE AFTER MARKET SUPERCHARGER FROM FORCED AEROMOTIVE.
- [SDR 2021FA0000354](https://openairdocs.org/sdr/2021FA0000354.md): None · none · Dec 3, 2021 · N425MT · Cirrus SR22 · Pneumatic System
  > PISTON PIN BROKE IN TWO, INSIDE BREAKAGE KEPT PARTS INTACT. P/N 630046 FOUND DURING CYLINDER EXCHANGE FOR LOW COMPRESSION CYLINDER, UNRELATED TO PIN FAILURE. PICTURES ON REQUEST AVAILABLE.
- [SDR 2021FA0000279](https://openairdocs.org/sdr/2021FA0000279.md): Piston Pin · broken · Aug 17, 2021 · N115C · Cirrus SR22 · Engine (Reciprocating)
  > THE ENGINE HAS HAD METAL IN THE FILTER. WE REMOVED CYLINDERS AND FOUND TWO PISTON PINS THAT WERE BROKEN. THE ENGINE WAS REMOVED FROM THE AIRCRAFT AND SENT TO CONTINENTAL FOR OVERHAUL.
- [SDR 2021FA0000169](https://openairdocs.org/sdr/2021FA0000169.md): Piston Pin · cracked · Jun 11, 2021 · N6503C · Lancar LC42550FG · Reciprocating Engine Cylinder Section
  > AIRCRAFT CAME IN TO REPAIR STATION FOR LOW, BUT WITHIN LIMITS, COMPRESSION ON #3 CYLINDER. BORESCOPE ALSO SHOWED EVIDENCE OF OIL ON CYLINDER WALL AND OIL ON SPARK PLUG. CYLINDER # 3 WAS REPLACED. UPON JOB CLEANUP, IT WAS DISCOVERED THAT THE CAPS ON THE OIL
- [SDR 2021FA0000111](https://openairdocs.org/sdr/2021FA0000111.md): Alt Air Door · separated · Apr 12, 2021 · N722SC · Cirrus SR22 · Engine Controls
  > PILOT REPORTED THROTTLE STUCK HALF WAY OPEN DURING FLIGHT. INSPECTED THROTTLE CONTROL AFT OF FIREWALL WITH NO DEFECTS. DISASSEMBLED Y PIPE THAT HOUSES THE ALTERNATE AIR FLAPPER VALVE AND FILTER. DISCOVERED MOST OF THE FLAPPER VALVE UP TO THE HINGE BOLT BROK
- [SDR 6SKA202102191](https://openairdocs.org/sdr/6SKA202102191.md): Transducer · intermittent · Feb 17, 2021 · N953AB · Cirrus SR22 · Engine Oil Pressure
  > FLUCTUATION OF INDICATED ENGINE OIL PRESSURE CAUSED BY FAILING OIL PRESSURE TRANSDUCER. OIL PRESSURE TRANSDUCER WAS CHANGED WITH A NEW TRANSDUCER AND ISSUE WAS RESOLVED. TRANSDUCER PN 12635-004.
- [SDR 2021FA0000029](https://openairdocs.org/sdr/2021FA0000029.md): Drive Assy · failed · Feb 2, 2021 · Cirrus SR22 · Reciprocating Engine Supercharger
  > AIRCRAFT INSTALLED WITH SUPERCHARGER. REMOVED PULLY DRIVE ASSY FOR INSPECTION. NOTED DRIVE SHAFT SPLINE UNEVENLY WORN AND GALLED. PULLED ACCESSORY DRIVE RECEIVING SHAFT. NOTED MISSING MATERIAL FROM RECEIVING MATING AREA. SIGNIFICANT METAL PRESENT. CONFERRED WI
- [SDR FJTR20210110002](https://openairdocs.org/sdr/FJTR20210110002.md): Roll Servo · shorted · Jan 3, 2021 · N221CD · Cirrus SR22 · Autopilot System
  > PILOT REPORTED, "THE AUTOPILOT, AT TIMES, WOULD NOT JOIN THE LOCALIZER AND/OR GLIDEPATH. THE DAY I FLEW IT TO CONTOUR FOR MY ANNUAL, IT WOULD NOT HOLD A HDG HEADING AND KEPT POPPING THE CIRCUIT BREAKER." REPAIR STATION NOTES: OPERATIONAL CHECKOUT OF AUTOPILO
- [SDR 2020FA0000562](https://openairdocs.org/sdr/2020FA0000562.md): Piston Pin · destroyed · Dec 23, 2020 · N321BG · Cirrus SR22 · Reciprocating Engine Front Section
  > NR 5 CYLINDER SUSPECTED CRACKED. CONFIRMED ON DYE PEN WITH A CRACK AT THE INJECTOR BOSS. REMOVED POWER ASSEMBLY FOR DISPOSAL. PISTON WRISTPIN WAS OBSERVED ROTATING WITHIN POWER ASSEMBLY, REMOVED WRISTPIN. WRISTPIN WAS BROKEN IN 2 PIECES WITH SEVERAL SIGNIF
- [SDR FJTR20210110001](https://openairdocs.org/sdr/FJTR20210110001.md): Roll Servo · twisted · Dec 10, 2020 · N224SY · Cirrus SR22 · Autopilot System
  > PILOT REPORTED TODAY (SATURDAY) TOOK IT OUT TO FLY SOME APPROACHES MAKE SURE EVERYTHING WAS WORKING OK. LET THE AUTOPILOT FLY ONE APPROACH, NO ISSUES. HAND FLEW THE NEXT APPROACH AND WITHOUT TOUCHING THE ROLL TRIM IT WENT FULL RIGHT, SMOKE CAME FROM CENTER C
- [SDR 2020FA0000490](https://openairdocs.org/sdr/2020FA0000490.md): Exhaust Riser · elongated · Nov 9, 2020 · N678EC · Cirrus SR22 · Engine Collector/Tailpipe/Nozzle
  > NR 1 CYLINDER EXHAUST STACK HAS AN ELONGATED BOLT HOLE THAT IS ALLOWING FOR THE BOLT HEAD TO REST ON THE STACK AND IS WEARING INTO THE SIDE WALL. (PHOTOS TO FOLLOW.)
- [SDR 2020FA0000449](https://openairdocs.org/sdr/2020FA0000449.md): Magneto · inoperative · Oct 19, 2020 · N668SR · Cirrus SR22 · Magneto/Distributor
  > LEFT MAGNETO INTERNAL GEAR FAILURE. LESS THAN 200 HRS SINCE LAST MAGNETO OVERHAUL. THIS IS THE THIRD TIME ON SAME AIRCRAFT THAT THE LEFT MAGNETO HAS FAILED PRIOR TO SCHEDULED 500 HR INSPECTION, DUE TO PLASTIC DISTRIBUTOR GEAR STRIPPING/BROKEN TEETH. MAGNETO
- [SDR IKBR2020072100003](https://openairdocs.org/sdr/IKBR2020072100003.md): Connector · damaged · Jul 21, 2020 · N250JH · Cirrus SR22 · Instrument System Wiring
  > PILOT FOUND STALL WARNING AND FUEL QUANTITY CIRCUIT BREAKERS TRIPPED ON TROUBLESHOOTING, FOUND CONNECTOR P1048 AND J1048 AT BS 293 FOR THE RECOVERABLE DATA LOGGER CORRODED, BURNED, AND MELTED. INSTALLED A NEW P1048 CONNECTOR AND INSTALLED REPAIRED DATA LOG
- [SDR 2020FA0000359](https://openairdocs.org/sdr/2020FA0000359.md): Check Valve · separated · Jul 20, 2020 · N792PG · Cirrus SR22 · Exhaust Turbocharger
  > AT CRUISE PILOT REALIZED A LOSS IN OIL PRESSURE. DECLARED AN EMERGENCY, AND LANDED. ON INSPECTION, FOUND THAT THE LEFT TURBO OIL INLET CHECK VALVE HAD SHEARED OFF AT THE THREADS GOING INTO THE TURBO OIL INLET. THIS CAUSED MOST OF THE OIL TO BE DUMPED OVER BOA
- [SDR 2020FA0000313](https://openairdocs.org/sdr/2020FA0000313.md): Cylinder · broken · Jun 18, 2020 · N138MC · Cirrus SR22 · Reciprocating Engine Cylinder Section
  > ON CLIMB OUT THE ENGINE STARTED RUNNING ROUGH. VISUAL INSPECTION PERFORMED AND CYLINDER NUMBER 6 HAS FOUND TO BE BROKEN IN HALF.
- [SDR 2020FA0000314](https://openairdocs.org/sdr/2020FA0000314.md): Fuel Nozzle · broken · Jun 18, 2020 · N138MC · Cirrus SR22 · Fuel Injector Nozzle
  > ON CLIMB OUT THE ENGINE STARTED RUNNING ROUGH. VISUAL INSPECTION PERFORMED AND CYLINDER NUMBER 6 FUEL INJECTOR NOZZLE HAS FOUND TO BE BROKEN IN HALF.
- [SDR 2020F00131](https://openairdocs.org/sdr/2020F00131.md): Cylinder · cracked · Feb 7, 2020 · N749KP · Cessna U206G · Reciprocating Engine Cylinder Section
  > ON ENGINE 100 HOUR IT WAS FOUND THAT 4 OF THE 6 CYLINDERS WERE CRACKED. ALL WERE EMANATING FROM THE UPPER SPARK PLUG HOLE TO THE FUEL NOZZLE HOLE
- [SDR 2019FA0000388](https://openairdocs.org/sdr/2019FA0000388.md): Pump · abnormal · Dec 3, 2019 · N899AM · Cirrus SR22 · Engine Fuel Pump
  > PILOT TOOK OFF AFTER THE AIRCRAFT HAD A ROUTINE ANNUAL. AFTER 20 MIN OF FLIGHT THE ENGINE STARTED RUNNING ROUGH AND CUTTING OFF. HE SWITCHED THE FUEL SELECTOR AND TURNED ON THE BOOST PUMP. THE ENGINE STARTED TO RUN AGAIN. THE PILOT TURNED OFF THE BOOST PUMP AN
- [SDR 2019FA0000347](https://openairdocs.org/sdr/2019FA0000347.md): Crankshaft · failed · Sep 10, 2019 · N827DG · Cessna U206G · Reciprocating Engine Power Section
  > IN FLIGHT FAILURE OF CRANKSHAFT. CRANKSHAFT SEPARATED AFT OF #2 MAIN BEARING. THERE WAS SEVERE DISTRESS OF THE #2 MAIN BEARING, CRANKCASE INTERIOR AND THE LOWER PART OF CYLINDERS 1 AND 2. ENGINE IMMEDIATELY LOST POWER. FORCED LANDING WAS SUCCESSFULLY PERFORMED
- [SDR 2019FA0000217](https://openairdocs.org/sdr/2019FA0000217.md): Ignition Lead · burned out · Jul 8, 2019 · N214TW · Cirrus SR22 · Ignition Harness (Distribution)
  > IN (2) YEARS THE BRAND NEW SPARK PLUG HARNESS SPRINGS COMPLETELY RUSTED AND BURNED OUT ON IGNITION HARNESS. APPEARS TO BE SUBSTANDARD STAINLESS STEEL SPRINGS AND GALVANIC CORROSION COMMON TO LEAD.

Next page: https://openairdocs.org/engine/continental-io-550-n/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 engine_model_key = 'IO550N'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/continental-io-550-n/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.