# TCM IO-550-N

- Type: Engine model (FAA registry)
- Registry code: 42990
- Manufacturer (registry): TCM
- Model: IO-550-N
- Engine type: Reciprocating
- Power: 310 hp
- Data sheet: [TCDS E3SO](https://openairdocs.org/tcds/E3SO) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 10 registered aircraft
- Page: https://openairdocs.org/engine/tcm-io-550-n

Model codes come from the FAA registry's reference file.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2023-17-04](https://openairdocs.org/ad/2023-17-04): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Oct 26, 2023
- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023
- [AD 2023-05-16](https://openairdocs.org/ad/2023-05-16): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 147 more. Effective Mar 15, 2023
- [AD 2023-02-12](https://openairdocs.org/ad/2023-02-12): Engine Air Intake System · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Feb 17, 2023
- [AD 2020-16-11](https://openairdocs.org/ad/2020-16-11): SUMMARY: Reciprocating Cylinder Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 23 more. Effective Sep 21, 2020
- [AD 2016-16-12](https://openairdocs.org/ad/2016-16-12): Cylinder assemblies · Continental Motors LTSIO-520-AE, TSIO-520-A, TSIO-520-AE and 89 more. Effective Sep 15, 2016
- [AD 2014-05-29](https://openairdocs.org/ad/2014-05-29): SAP replacement parts manufacturer approval (PMA) investment cast cylinder assemblies · Continental Motors TSIO-520-A, TSIO-520-AE, TSIO-520-AF and 55 more. Effective Apr 25, 2014
- [AD 2012-10-13](https://openairdocs.org/ad/2012-10-13): Starter adapters · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Jun 8, 2012
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2010-11-04](https://openairdocs.org/ad/2010-11-04): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 190 more. Effective Jun 16, 2010
- [AD 2007-16-10](https://openairdocs.org/ad/2007-16-10): Kelly Aerospace Power Systems turbochargers · Turbonormalizing system (Engine Technologies STC SE10589SC or SA10588SC). Effective Aug 23, 2007
- [AD 2004-08-10](https://openairdocs.org/ad/2004-08-10): Serial-numbered (SN) cylinders · Modify Teledyne Continental TSIO-520-NB engine (RAM Aircraft Limited Partnership STC SE09104SC or 4 others). Effective May 5, 2004
- [AD 2000-23-21](https://openairdocs.org/ad/2000-23-21): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 164 more. Effective Dec 12, 2000
- [AD 99-19-01](https://openairdocs.org/ad/99-19-01): No. 2 and No. 5 Crankshaft Inspections · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Sep 30, 1999
- [AD 96-12-22](https://openairdocs.org/ad/96-12-22): Full Flow Engine Oil Adapter · Bellanca CH-300 Pacemaker, 120, 140 and 361 more. Effective Jul 31, 1996
- [AD 93-08-17](https://openairdocs.org/ad/93-08-17): Oil Pick-Up Tube · Continental Motors IO-470-A, IO-470-C, IO-470-D and 104 more. Effective Aug 23, 1993
- [AD 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993
- [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991
- [AD 88-03-06](https://openairdocs.org/ad/88-03-06): Oil Filter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 155 more. Effective Apr 15, 1988

Historical (superseded or no longer in force):

- [AD 2023-04-08](https://openairdocs.org/ad/2023-04-08) (historical): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 141 more. Effective Feb 23, 2023
- [AD 2011-25-51](https://openairdocs.org/ad/2011-25-51) (historical): Starter Adapter Gear Shaft · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Dec 28, 2011
- [AD 2009-24-52](https://openairdocs.org/ad/2009-24-52) (historical): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 192 more
- [AD 2009-16-03](https://openairdocs.org/ad/2009-16-03) (historical): Cylinder assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 55 more. Effective Sep 9, 2009
- [AD 2000-08-51](https://openairdocs.org/ad/2000-08-51) (historical): Crankshaft · Teledyne Continental Motors IO-360-A, IO-360-AB, IO-360-B and 158 more
- [AD 99-09-17](https://openairdocs.org/ad/99-09-17) (historical): Crankshaft · Teledyne Continental Motors IO-470-A, IO-470-C, IO-470-D and 114 more

## Information bulletins (advisory) (10)

- [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020
- [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT  Alternator Drive Coupling. Issued Jun 20, 2018
- [SAIB NE-17-11](https://openairdocs.org/saib/NE-17-11): POWERPLANT  Engine damage as a result of kickback. Issued May 10, 2017
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013
- [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012
- [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009
- [SAIB NE-10-07](https://openairdocs.org/saib/NE-10-07): Reciprocating Engine Cylinder: Identification Information for Superior Air Parts, PMA Cylinder Heads for Teledyne Continental Motors (TCM) IO-520, TSIO-520,and IO-550 Series Engines.. Issued Nov 2, 2009
- [SAIB NE-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009
- [SAIB NE-02-41](https://openairdocs.org/saib/NE-02-41): . Issued Aug 8, 2002

## Registered aircraft (10)

- [N21TE](https://openairdocs.org/aircraft/N21TE): [National Test Pilot School](https://openairdocs.org/faa-owner/NATIONAL%20TEST%20PILOT%20SCHOOL), [Mojave, CA](https://openairdocs.org/faa-place/CA/Mojave), built 2004, S/N 0964
- [N28TK](https://openairdocs.org/aircraft/N28TK): [Los Cielos Flyers LLC](https://openairdocs.org/faa-owner/LOS%20CIELOS%20FLYERS%20LLC), [San Antonio, TX](https://openairdocs.org/faa-place/TX/San%20Antonio), built 2002, S/N 0263
- [N303SR](https://openairdocs.org/aircraft/N303SR): [Tvpx Aircraft Solutions Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20AIRCRAFT%20SOLUTIONS%20INC%20TRUSTEE), [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake), built 2007, S/N 2420
- [N411AP](https://openairdocs.org/aircraft/N411AP): [N411ap LLC](https://openairdocs.org/faa-owner/N411AP%20LLC), [Independence, KS](https://openairdocs.org/faa-place/KS/Independence), built 2002, S/N 0215
- [N427TX](https://openairdocs.org/aircraft/N427TX): [Mayfly Holdings LLC](https://openairdocs.org/faa-owner/MAYFLY%20HOLDINGS%20LLC), [Monticello, FL](https://openairdocs.org/faa-place/FL/Monticello), built 2008, S/N 421007
- [N503SM](https://openairdocs.org/aircraft/N503SM): [Tyler Lauren M](https://openairdocs.org/faa-owner/TYLER%20LAUREN%20M), [Ticonderoga, NY](https://openairdocs.org/faa-place/NY/Ticonderoga), built 2022, S/N 8791
- [N6504Z](https://openairdocs.org/aircraft/N6504Z): [Albertson Robbie H](https://openairdocs.org/faa-owner/ALBERTSON%20ROBBIE%20H), [Easley, SC](https://openairdocs.org/faa-place/SC/Easley), built 2003, S/N 42024
- [N651XC](https://openairdocs.org/aircraft/N651XC): [Woodland Air LLC](https://openairdocs.org/faa-owner/WOODLAND%20AIR%20LLC), [Grand Rapids, MI](https://openairdocs.org/faa-place/MI/Grand%20Rapids), built 2003, S/N 0475
- [N7ZD](https://openairdocs.org/aircraft/N7ZD): [Edgerton Emmett Cecil III](https://openairdocs.org/faa-owner/EDGERTON%20EMMETT%20CECIL%20III), [Dunn, NC](https://openairdocs.org/faa-place/NC/Dunn), built 2005, S/N 42068
- [N9770C](https://openairdocs.org/aircraft/N9770C): [Anderson James M III](https://openairdocs.org/faa-owner/ANDERSON%20JAMES%20M%20III), [Atlanta, GA](https://openairdocs.org/faa-place/GA/Atlanta), built 2022, S/N ES-011

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ERA22LA155](https://openairdocs.org/ntsb/ERA22LA155), Mar 13, 2022: Aircraft Designs Stallion (N262KT), Ridgeland, SC, substantial damage. Probable cause: A loss of sufficient electrical power to the engine’s electronic fuel injection/ignition system for undetermined reasons, which resulted in a total loss of engine power.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20220313003289A](https://openairdocs.org/incident/20220313003289A), Mar 13, 2022: S D Martin STALLION (N262KT), Ridgeland, SC, Substantial damage. Experimental homebuilt flight number 5, pilot/builder/mechanic stated the during initial takeoff, the overvoltage light came on, then the landing gear started…

## Service difficulty reports (335, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2026FA0000818](https://openairdocs.org/sdr/2026FA0000818), Oct 6, 2026: DRIVE GEAR. SPALLED. 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 VARYIN
- [SDR 2026FA0000796](https://openairdocs.org/sdr/2026FA0000796), Sep 30, 2026: LOCK TAB. MISINSTALLED. 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 W
- [SDR 2026FA0000820](https://openairdocs.org/sdr/2026FA0000820), Sep 24, 2026: DRIVE GEAR. SPALLED. 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 VARYIN
- [SDR EVGR20260720001](https://openairdocs.org/sdr/EVGR20260720001), Jul 1, 2026: PUMP. LEAKING. 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
- [SDR 2026FA0000597](https://openairdocs.org/sdr/2026FA0000597), Apr 16, 2026: ENGINE. FAILED. COMPLETE LOSS OF POWER IN CRUISE FLIGHT, AIRCRAFT WAS DITCHED AND UNRECOVERABLE.
- [SDR 2026FA0000210](https://openairdocs.org/sdr/2026FA0000210), Mar 13, 2026: ALTERNATOR. FAILED. FACTORY NEW ALTERNATOR SUDDENLY FAILED AFTER ONE MONTH AND 52 FLIGHT HOURS SINCE INSTALLATION. FAILURE OCCURRED IN CRUISE FLIGHT RESULTING IN A TOTAL ELECTRICAL
- [SDR 2026FA0000052](https://openairdocs.org/sdr/2026FA0000052), Nov 23, 2025: SPARK PLUG. CRACKED. 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,
- [SDR 2025FA0000529](https://openairdocs.org/sdr/2025FA0000529), Jul 18, 2025: FILTER. MELTED. PRESSURIZED MAGNETO AIR SOURCE FILTER MELTED/DEFORMED AFTER ONLY 79H AFTER INSTALLATION. BLOCKAGE OF AIR TO MAGNETO CAUSED LEFT MAGNETO FAILURE, WHICH WAS ALSO 
- [SDR 2025FA0000408](https://openairdocs.org/sdr/2025FA0000408), Jun 18, 2025: OIL COOLER. CRACKED. 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 LEAK
- [SDR 2025FA0000445](https://openairdocs.org/sdr/2025FA0000445), Jun 5, 2025: RHEOSTAT. UNKNOWN. 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 FLYIN
- [SDR 2025FA0000282](https://openairdocs.org/sdr/2025FA0000282), Apr 21, 2025: CYLINDER HEAD. CRACKED. CRACKS / SEPARATION OF CYLINDER EVEN AFTER COMPLYING WITH AD 2020-16-11 OVER 5 YEARS AGO.
- [SDR 2025FA0000113](https://openairdocs.org/sdr/2025FA0000113), Jan 23, 2025: CONNECTING ROD. BINDING. DURING FLIGHT THE AIRCRAFT OWNER/OPERATOR NOTICED A DRONING VIBRATION AT CRUISE. UPON LANDING, ALL CYLINDERS WERE INSPECTED AND BORE-SCOPED. MOVED PROPELLER BAC
- [SDR 2025FA0000010](https://openairdocs.org/sdr/2025FA0000010), Jan 8, 2025: CYLINDER HEAD. BURNED. 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 
- [SDR 2024FA0000961](https://openairdocs.org/sdr/2024FA0000961), Dec 13, 2024: CYLINDER. CRACKED. I PREVIOUSLY REPORTED THIS CYLINDER FOR A LOOSE VALVE GUIDE (CONTROL # 2024FA0000818). UPON FURTHER INSPECTION, THIS CYLINDER IS ALSO CRACKED IN THE TARGET AREA
- [SDR 2024FA0000818](https://openairdocs.org/sdr/2024FA0000818), Nov 6, 2024: VALVE GUIDE. LOOSE. 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
- [SDR 2024FA0000777](https://openairdocs.org/sdr/2024FA0000777), Oct 19, 2024: DRIVE SHAFT. DAMAGED. 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 
- [SDR 2024FA0000677](https://openairdocs.org/sdr/2024FA0000677), Aug 21, 2024: ENGINE. BLOWN. 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 
- [SDR 2025FA0000380](https://openairdocs.org/sdr/2025FA0000380), Jun 16, 2024: SCREW. SHEARED. 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 COWLI
- [SDR 2024FA0000367](https://openairdocs.org/sdr/2024FA0000367), May 13, 2024: CYLINDER HEAD. CRACKED. 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 A
- [SDR 2024FA0000370](https://openairdocs.org/sdr/2024FA0000370), May 2, 2024: PULLEY. DAMAGED. 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
- [SDR 2024FA0000343](https://openairdocs.org/sdr/2024FA0000343), Apr 27, 2024: CONTROL UNIT. BURNED. 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 P
- [SDR 2024FA0000297](https://openairdocs.org/sdr/2024FA0000297), Apr 4, 2024: MCU. FAILED. 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
- [SDR 2024FA0000306](https://openairdocs.org/sdr/2024FA0000306), Apr 4, 2024: MCU. FAILED. 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
- [SDR EVGR2024040900001](https://openairdocs.org/sdr/EVGR2024040900001), Jan 8, 2024: PISTON RING. STUCK. 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
- [SDR 2023F00233](https://openairdocs.org/sdr/2023F00233), Jul 20, 2023: UNKNOWN. UNKNOWN. 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 
- [SDR E5ZR202308070001](https://openairdocs.org/sdr/E5ZR202308070001), Jul 17, 2023: CRANKSHAFT. RUSTED. 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 SUPPLIE
- [SDR 2023FA0000374](https://openairdocs.org/sdr/2023FA0000374), Jul 14, 2023: CRANKSHAFT. CORRODED. 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 SUPPLIE
- [SDR 2023FA0000276](https://openairdocs.org/sdr/2023FA0000276), May 17, 2023: MOUNT. DESTROYED. DEPARTED TETERBORO LATE AT NIGHT. WHILE ENROUTE NOTICED A REDUCTION IN MANIFOLD PRESSURE CONSISTENT WITH A SUPERCHARGER BELT FAILURE. RECONFIGURED FOR NORMALLY 
- [SDR 2022FA0000678](https://openairdocs.org/sdr/2022FA0000678), Nov 9, 2022: NUT. LOOSE. 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 MM32-2
- [SDR 2022FA0000217](https://openairdocs.org/sdr/2022FA0000217), Apr 19, 2022: MOUNT. CRACKED. 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 PRE
- [SDR 2022FA0000165](https://openairdocs.org/sdr/2022FA0000165), Mar 23, 2022: DRIVE SHAFT. CRACKED. 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), Dec 3, 2021: NONE. NONE. 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. PI
- [SDR 2021FA0000279](https://openairdocs.org/sdr/2021FA0000279), Aug 17, 2021: PISTON PIN. BROKEN. 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 CO
- [SDR 2021FA0000169](https://openairdocs.org/sdr/2021FA0000169), Jun 11, 2021: PISTON PIN. CRACKED. 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 SPA
- [SDR 2021FA0000111](https://openairdocs.org/sdr/2021FA0000111), Apr 12, 2021: ALT AIR DOOR. SEPARATED. PILOT REPORTED THROTTLE STUCK HALF WAY OPEN DURING FLIGHT. INSPECTED THROTTLE CONTROL AFT OF FIREWALL WITH NO DEFECTS. DISASSEMBLED Y PIPE THAT HOUSES THE ALTER
- [SDR 6SKA202102191](https://openairdocs.org/sdr/6SKA202102191), Feb 17, 2021: TRANSDUCER. INTERMITTENT. FLUCTUATION OF INDICATED ENGINE OIL PRESSURE CAUSED BY FAILING OIL PRESSURE TRANSDUCER. OIL PRESSURE TRANSDUCER WAS CHANGED WITH A NEW TRANSDUCER AND ISSUE WAS 
- [SDR 2021FA0000029](https://openairdocs.org/sdr/2021FA0000029), Feb 2, 2021: DRIVE ASSY. FAILED. AIRCRAFT INSTALLED WITH SUPERCHARGER. REMOVED PULLY DRIVE ASSY FOR INSPECTION. NOTED DRIVE SHAFT SPLINE UNEVENLY WORN AND GALLED. PULLED ACCESSORY DRIVE RECEIVI
- [SDR FJTR20210110002](https://openairdocs.org/sdr/FJTR20210110002), Jan 3, 2021: ROLL SERVO. SHORTED. 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 HEA
- [SDR 2020FA0000562](https://openairdocs.org/sdr/2020FA0000562), Dec 23, 2020: PISTON PIN. DESTROYED. 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 ROTAT
- [SDR FJTR20210110001](https://openairdocs.org/sdr/FJTR20210110001), Dec 10, 2020: ROLL SERVO. TWISTED. 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
- [SDR 2020FA0000490](https://openairdocs.org/sdr/2020FA0000490), Nov 9, 2020: EXHAUST RISER. ELONGATED. 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 FOL
- [SDR 2020FA0000449](https://openairdocs.org/sdr/2020FA0000449), Oct 19, 2020: MAGNETO. INOPERATIVE. 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 PRIO
- [SDR IKBR2020072100003](https://openairdocs.org/sdr/IKBR2020072100003), Jul 21, 2020: CONNECTOR. DAMAGED. PILOT FOUND STALL WARNING AND FUEL QUANTITY CIRCUIT BREAKERS TRIPPED ON TROUBLESHOOTING, FOUND CONNECTOR P1048 AND J1048 AT BS 293 FOR THE RECOVERABLE DATA LOGG
- [SDR 2020FA0000359](https://openairdocs.org/sdr/2020FA0000359), Jul 20, 2020: CHECK VALVE. SEPARATED. 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 O
- [SDR 2020FA0000313](https://openairdocs.org/sdr/2020FA0000313), Jun 18, 2020: CYLINDER. BROKEN. 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), Jun 18, 2020: FUEL NOZZLE. BROKEN. 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), Feb 7, 2020: CYLINDER. CRACKED. 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), Dec 3, 2019: PUMP. ABNORMAL. 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 A
- [SDR 2019FA0000347](https://openairdocs.org/sdr/2019FA0000347), Sep 10, 2019: CRANKSHAFT. FAILED. 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
- [SDR 2019FA0000217](https://openairdocs.org/sdr/2019FA0000217), Jul 8, 2019: IGNITION LEAD. BURNED OUT. 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 AN

All 335: https://openairdocs.org/engine/tcm-io-550-n/reports.md

## STCs that may be installed (OpenAirDocs) (19)

Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc
- [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc
- [STC SE02525AT](https://openairdocs.org/stc/SE02525AT): Modification to install new engine mount brackets. Summit Aviation Inc
- [STC SE09356SC](https://openairdocs.org/stc/SE09356SC): Install F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter adapter for a spin-on oil filter. Stratus Tool Technologies LLC
- [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists IO-550 Series
- [STC SE10926SC](https://openairdocs.org/stc/SE10926SC): Installation of BAR Air, LLC supercharger system on Teledyne Continental Motors IO-550-N Engines. Bar Air LLC
- [STC SE10589SC](https://openairdocs.org/stc/SE10589SC): Installation of turbonormalizing system. Engine Technologies Inc
- [STC SE1688GL](https://openairdocs.org/stc/SE1688GL): Installation of a Shadin Company fuel flow transducer. Shadin Avionics
- [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc
- [STC SE01628NY](https://openairdocs.org/stc/SE01628NY): Modification of starter adapter by substitution or rework of accessory drive parts. Canadian Aero Manufacturing
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE09963SC](https://openairdocs.org/stc/SE09963SC): Installation of modified fuel injector nozzles. General Aviation Modifications, Inc
- [STC SE09513SC](https://openairdocs.org/stc/SE09513SC): Installation and usage of Exxon 20W50 Multigrade aircraft engine oil conforming to Exxon Oil Formulation WS-3013. Exxon Company USA
- [STC SE09319SC](https://openairdocs.org/stc/SE09319SC): Modify oil pan adding a new oil sump drain. Texas Skyways Inc. Lists IO-550 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation

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