# Continental IO-520-CB - Type: Engine model (FAA registry) - Registry code: 17234 - Manufacturer (registry): CONT MOTOR - Model: IO-520-CB - Engine type: Reciprocating - Power: 285 hp - Data sheet: [TCDS E5CE](https://openairdocs.org/tcds/E5CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 3 registered aircraft - Page: https://openairdocs.org/engine/continental-io-520-cb 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 2023-05-16](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 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022 - [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 2012-03-06](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 2009-19-07](https://openairdocs.org/ad/2009-19-07): EQ3 cylinders · Continental Motors IO-470-C, IO-470-D, IO-470-E and 72 more. Effective Oct 7, 2009 - [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 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 97-26-17](https://openairdocs.org/ad/97-26-17): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 90 more. Effective Jan 23, 1998 - [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 95-03-14](https://openairdocs.org/ad/95-03-14): Engine Mount Brackets · Continental Motors IO-346-A, IO-346-B, IO-520-C and 2 more. Effective Mar 13, 1995 - [AD 93-16-15](https://openairdocs.org/ad/93-16-15): Fuel Pump Drive Shaft · Continental Motors IO-520-B, IO-520-BA, IO-520-BB and 27 more. Effective Dec 14, 1993 - [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 - [AD 86-13-04 R3](https://openairdocs.org/ad/86-13-04-R3): Cylinder Assemblies · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 44 more. Effective Feb 24, 1988 - [AD 81-24-06](https://openairdocs.org/ad/81-24-06): Engine Driven Fuel Pumps · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 51 more. Effective Nov 23, 1981 - [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981 - [AD 80-01-04](https://openairdocs.org/ad/80-01-04): Cylinder Holddown Flange Assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 44 more. Effective Jan 25, 1980 - [AD 79-05-09](https://openairdocs.org/ad/79-05-09): Oil Pump Assembly Or Oil Pressure Relief Valve Screw And/Or Plunger · Teledyne Continental Motors 6-285-CA, GTSIO-520-C, GTSIO-520-D and 60 more. Effective Mar 12, 1979 - [AD 98-01-08](https://openairdocs.org/ad/98-01-08): Exhaust Roller Rocker Arm · Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW) 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 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 2009-24-51](https://openairdocs.org/ad/2009-24-51) (historical): Hydraulic lifters · Teledyne Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 156 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 94-09-07](https://openairdocs.org/ad/94-09-07) (historical): Engine Mount Brackets · Teledyne Continental Motors IO-346-A, IO-346-B, IO-520-C and 2 more. Effective Jul 5, 1994 - [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) (11) - [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-07-09R1](https://openairdocs.org/saib/NE-07-09R1): Periodic Inspections of ECi Cylinder Assemblies for Cracks in the Aluminum Head. Issued Mar 21, 2007 - [SAIB NE-02-41](https://openairdocs.org/saib/NE-02-41): . Issued Aug 8, 2002 ## Registered aircraft (3) - [N767FA](https://openairdocs.org/aircraft/N767FA): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1981, S/N TE1188 - [N7885C](https://openairdocs.org/aircraft/N7885C): [S Tec Corp](https://openairdocs.org/faa-owner/S%20TEC%20CORP), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1966, S/N TE-72 - [N926BT](https://openairdocs.org/aircraft/N926BT): [Telematic Systems Inc](https://openairdocs.org/faa-owner/TELEMATIC%20SYSTEMS%20INC), [North Fort Myers, FL](https://openairdocs.org/faa-place/FL/North%20Fort%20Myers), built 1977, S/N TE-1110 ## 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 CHI80DA018](https://openairdocs.org/ntsb/CHI80DA018), Dec 21, 1979: Beech B58 (N2058X), Taylorville, IL, destroyed, 2 fatal ## FAA accident and incident reports (3) 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. - [Incident 20240328011099I](https://openairdocs.org/incident/20240328011099I), Mar 28, 2024: Beech 95-C55 (N7885C), Mineral Wells, TX, Minor damage. On March 28 at 1109 central time, [privacy data omitted] conducted an r&d flight to evaluate an adahrs software mod iaw test conditions in rtca DO-334. Shortly… - [Accident 19791221044059A](https://openairdocs.org/incident/19791221044059A), Dec 21, 1979: Beech 58 (N2058X), Taylorville, IL, Destroyed, 1 fatal. Flew into trees on VFR night approach to airport with low ceiling, fog & rain in area. - [Incident 19780628035169I](https://openairdocs.org/incident/19780628035169I), Jun 28, 1978: Beech 58 (N958V), Charleston, WV, Minor damage. Nose pitched downward during rollout due to broken nose gear actuator arm. ## Service difficulty reports (68, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2025F00224](https://openairdocs.org/sdr/2025F00224), Sep 16, 2025: PISTON. SEPARATED. PISTON CYLINDER BECAME SEPARATED FROM THE HUB. IT APPEARS THAT THE THREADS STRIPPED OUT OF THE HUB ABOUT 1/8 INCH. AT THIS TIME WE ARE SENDING TO H&S PROPELLER - [SDR 2024FA0000298](https://openairdocs.org/sdr/2024FA0000298), Mar 28, 2024: ROD. BENT. INSPECTED GEAR COLLAPSE ON BARON N7885C JACKED AIRCRAFT. POWER ON. GEAR GREEN LIGHT ILLUMINATED. GEAR DOORS DAMAGED. INSPECTED AIRCRAFT. NO VISIBLE DAMAGE TO WI - [SDR 2016FA0000048](https://openairdocs.org/sdr/2016FA0000048), Dec 29, 2015: PUMP. BURNED. CABIN HEATER CIRCUIT BREAKER POPPED DURING HEATER OPERATION WHILE AIRCRAFT WAS IN FLIGHT. UPON LANDING MAINTENANCE PERFORMED INSPECTION/TROUBLESHOOTING OF HEATE - [SDR CXIA2015F00000](https://openairdocs.org/sdr/CXIA2015F00000), Jan 27, 2015: CONNECTING ROD. FAILED. RIGHT ENGINE WAS SHUTDOWN IN FLIGHT, ENROUTE TO TOP DUE TO OIL LEAKING FROM COWLING. AIRCRAFT LANDED WITHOUT INCIDENT. ENGINE WAS FOUND TO HAVE HOLES IN THE TOP - [SDR RIQA2015011600001](https://openairdocs.org/sdr/RIQA2015011600001), Dec 4, 2014: CONTROL CABLE. BROKEN. THROTTLE CABLE SNAPPED IN CRUISE FLIGHT ENROUTE TO A DESTINATION AIRPORT. NO POWER CHANGES WERE BEING MADE AT THE TIME OF FAILURE, PROBABLE CAUSE OF FAILURE SUS - [SDR BSYA2010046](https://openairdocs.org/sdr/BSYA2010046), Nov 24, 2010: VOLT REGULATOR. INTERMITTENT. ENROUTE, EXPERIENCED DUAL ALTERNATOR FAILURE SHORTLY BEFORE ARRIVING, LANDED NO PROBLEM. R & R BOTH VOLTAGE REGULATORS, OPS CHECKS GOOD. - [SDR BSYA2010040](https://openairdocs.org/sdr/BSYA2010040), Sep 8, 2010: LINE. LEAKING. ON TAKEOFF OUT OF AVP LEFT ENGINE STARTED SURGING 200-300 RPM PILOT THEN ABORTED TAKEOFF. MAINTENANCE FOUND OIL LINE COMING OFF THE PROP GOVERNOR LEAKING OIL. R - [SDR 2010FA0000768](https://openairdocs.org/sdr/2010FA0000768), Jul 27, 2010: CYLINDER. CRACKED. CYLINDERS ARE CRACKING IN THE INTAKE PORT BETWEEN THE FINS. HAD 8 OUT OF 12 CYLINDERS WITH FUEL STAINS BETWEEN THE FINS ON THE INTAKE PORT SIDE OF THE CYLINDER. - [SDR BSYA2009057A](https://openairdocs.org/sdr/BSYA2009057A), Dec 2, 2009: ENGINE. FAILED. AIRCRAFT EN ROUTE FROM BIH TO VCV WHEN BOTH ENGINES QUIT AT 16,000FT. AFTER DESCENDING 2,000FT PILOT WAS ABLE TO GET BOTH ENGINES RUNNING AGAIN AND THEN RETURNE - [SDR 2008FA0000380](https://openairdocs.org/sdr/2008FA0000380), Mar 3, 2008: ENGINE. MALFUNCTIONED. OH ENGINE AND RETURNED TO SERVICE APROX (2) YEARS AGO, 600 HOURS OPERATION. ENGINE FAILED WHEN POWER WAS REDUCED ON LANDING. THE COUNTERWEIGHT MANAGED TO HOOK O - [SDR FFKA020108124](https://openairdocs.org/sdr/FFKA020108124), Feb 1, 2008: TUBE. BROKEN. AFTER TAKEOFF PILOT REPORTED AN UN-COMMANDED FEATHERING OF THE LEFT ENGINE. AFTER LANDING MAINTENANCE FOUND OIL RESIDUE ON THE OUTSIDE OF ENGINE NACELLE, AND TH - [SDR RC2R130L](https://openairdocs.org/sdr/RC2R130L), Jan 23, 2008: PILOT VALVE. BROKEN. PROPELLER WENT TO FEATHER IN FLIGHT AND WAS UNABLE TO UNFEATHER. AFTER RECEIVING THE GOVERNOR FOR INSPECTION IT WAS DISCOVERED THAT THE BOTTOM END OF THE PILOT - [SDR 2007FA0000698](https://openairdocs.org/sdr/2007FA0000698), Jul 30, 2007: CYLINDER. CRACKED. NR 6 CYLINDER WAS NEW ECI REV 3 E SERIES CRACKED BETWEEN FINS 1-3 BEHIND FUEL INJECTOR. THIS IS 6TH ECI REV 3 E SERIES TO CARCK IN THE SAME LOCATION. (K) - [SDR XGN2007F00021](https://openairdocs.org/sdr/XGN2007F00021), Jul 30, 2007: CYLINDER HEAD. CRACKED. NR 6 CYLINDER WAS NEW ECI, REV 3, E SERIES, CRACKED BETWEEN FINS 1-3 BEHIND FUEL INJECTOR. THIS IS 6TH ECI, REV 3, E SERIES, TO CRACK IN THE SAME LOCATION. (K) - [SDR XGN2007F00025](https://openairdocs.org/sdr/XGN2007F00025), Jul 30, 2007: CYLINDER. CRACKED. NR 6 CYLINDER WAS NEW, REV 3, E SERIES, CRACKED BETWEEN FINS 1-3 BEHIND FUEL INJECTOR. THIS IS 6TH REV 3, E SERIES TO CRACK IN THE SAME LOCATION. (K) - [SDR N4C2007F00000](https://openairdocs.org/sdr/N4C2007F00000), Jul 26, 2007: ROD END. BROKEN. NOSE GEAR WOULD NOT LOCK DOWN BECAUSE OF A BROKEN ROD END ON THE NOSE GEAR RETRACT ROD. ROD END CONNECTS THE RETRACT ROD TO THE APR NOSE GEAR DRAG BRACE. RESULT - [SDR A6Y2007F00000](https://openairdocs.org/sdr/A6Y2007F00000), Mar 4, 2007: COOLING FAN. MALFUNCTIONED. APPROXIMATELY 20 MINUTES INTO THE FLIGHT PILOT SUSPECTED AN ELECTRICAL BURNING SMELL. HE NOTICED SOME SMOKE COMING FROM UNDER INSTRUMENT PANEL. AT THAT TIME HE - [SDR XGN2007F00007](https://openairdocs.org/sdr/XGN2007F00007), Oct 23, 2006: CYLINDER HEAD. CRACKED. CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K) - [SDR XGN2007F00015](https://openairdocs.org/sdr/XGN2007F00015), Oct 23, 2006: CYLINDER. CRACKED. CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K) - [SDR XGN2007F00005](https://openairdocs.org/sdr/XGN2007F00005), Sep 21, 2006: CYLINDER HEAD. CRACKED. CYLINDER HEAD CRACKED INTHE EXHAUST AREA. (K) - [SDR XGN2007F00009](https://openairdocs.org/sdr/XGN2007F00009), Sep 21, 2006: CYLINDER HEAD. CRACKED. CYLINDER HEAD CRACKED IN EXHAUST AREA. (K) - [SDR XGN2007F00011](https://openairdocs.org/sdr/XGN2007F00011), Sep 21, 2006: CYLINDER. CRACKED. CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K) - [SDR XGN2007F00012](https://openairdocs.org/sdr/XGN2007F00012), Sep 21, 2006: CYLINDER. CRACKED. CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K) - [SDR 2006FA0000538](https://openairdocs.org/sdr/2006FA0000538), May 10, 2006: CAMSHAFT. WORN. COMPRESSION CHECKED ENGINE, NR 2 CYLINDER 40/80. REMOVED NR 2 CYL FOR REPAIR. INSP INSIDE OF ENG, FOUND NR 1 CYL EXHAUST LIFTER/CAM LOBE BADLY WORN. UNKNOWN HOW - [SDR 2006FA0000050](https://openairdocs.org/sdr/2006FA0000050), Jan 10, 2006: CYLINDER. CRACKED. ENGINE CYLINDER CRACKED AND BARREL AND HEAD. - [SDR 2006FA0000051](https://openairdocs.org/sdr/2006FA0000051), Jan 10, 2006: CYLINDER. CRACKED. ENGINE CYLINDER CRACKED AT BARREL AND HEAD. (K) - [SDR FPI2006F00000](https://openairdocs.org/sdr/FPI2006F00000), Jan 10, 2006: CYLINDER. CRACKED. CRACKED AT BARREL AND HEAD. (K) - [SDR FPI2006F00003](https://openairdocs.org/sdr/FPI2006F00003), Jan 10, 2006: CYLINDER. CRACKED. CRACKED AT BARREL AND HEAD. (K) - [SDR BSYA200500030](https://openairdocs.org/sdr/BSYA200500030), Dec 12, 2005: SEAL. SLIPPED. ON TAKEOFF, PILOT NOTICED SMOKE COMING FROM LT ENGINE, PILOT ELECTED TO RETURN TO DEPARTURE. MAINTENANCE FOUND THAT THE NEWLY INSTALLED VACUUM PUMP SEAL HAD SLI - [SDR BSYA200500016](https://openairdocs.org/sdr/BSYA200500016), Oct 26, 2005: DOOR. UNSECURE. COCKPIT DOOR POPPED OPEN AFTER TAKEOFF, RETURNED AND LANDED PROPERLY, SECURED DOOR AND CONTINUED WITH FLIGHT. - [SDR 4028](https://openairdocs.org/sdr/4028), Nov 19, 2004: PISTON. DAMAGED. ON APPROACH INTO CMH, RIGHT ENGINE LOST ALL OIL PRESSURE, PROPELLER FEATHERED AND ENGINE SHUT DOWN. FOUND NR 2 CYLINDER PISTON WITH SIGNS OF DESTINATION, FUEL N - [SDR 4026](https://openairdocs.org/sdr/4026), Nov 4, 2004: LANDING GEAR. MALFUNCTIONED. ON DEPARTURE OUT OF IND, SELECTED GEAR UP NOTHING HAPPENED, RETURNED TO IND. MAINTENANCE COULD NOT DUPLICATE GEAR UP PROBLEM, CHANGED DYNAMIC BREAK RELAY AND LA - [SDR 4023](https://openairdocs.org/sdr/4023), Sep 17, 2004: THROTTLE ARM. BROKEN. AIRCRAFT WAS ON APPROACH AND ENGINE WOULD NOT RESPOND TO POWER LEVER ADJUSTMENTS. ENGINE WAS SHUT DOWN AND LANDING WAS MADE. VISUAL INSPECTION REVEALED THROTTLE - [SDR 4010](https://openairdocs.org/sdr/4010), Mar 20, 2004: RELAY. INTERMITTENT. (CLE) GEAR WOULD NOT COME DOWN, CYCLED GEAR SELECTOR MANY TIMES THEN GEAR FINALLY CAME DOWN, PILOT ELECTED TO FLY GEAR DOWN TO (CMH). MAINT. FOUND BOTH THE CIRC - [SDR 2004FA0000071](https://openairdocs.org/sdr/2004FA0000071), Oct 15, 2003: ARM. CRACKED. PILOT WAS REMOVING RUDDER PEDAL GUST LOCK AND STATED THE TOP OF THE PEDAL (JUST FELL OFF). PEDAL ARM HAD SEPARATED NEAR THE TOP END. CROSS SECTION AREA, AT THE - [SDR BSY2003F00018](https://openairdocs.org/sdr/BSY2003F00018), Aug 8, 2003: LINE. OBSTRUCTED. AIRSPEED INOPERATIVE ON TAKEOFF. REMOVED LINE FROM PITOT TUBE, BLEW BACK THRU TUBE , REMOVE OBSTRUCTION, RECONNECTED. LEAKED CHECKED. OPS CHECK GOOD. - [SDR BSY2003F00020](https://openairdocs.org/sdr/BSY2003F00020), Jul 22, 2003: MAGNETO. INOPERATIVE. LT ENGINE WOULD ONLY REACH 2000 RPM ON TAKEOFF. FOUND LEFT MAGNETO DEAD. REMOVED AND REPLACED LT MAGNETO. OPS CHECK GOOD. - [SDR BSY2003F00016](https://openairdocs.org/sdr/BSY2003F00016), Jun 2, 2003: WIRE. BROKEN. GEAR WOULD NOT RETRACT, FOUND BROKEN WIRE IN LEFT WHEEL WELL COMING OFF SQUAT SWITCH, REPAIRED WIRE, OPS CHECK GOOD. - [SDR 4144W1](https://openairdocs.org/sdr/4144W1), May 20, 2003: DRAG LINK. CRACKED. IT WAS NOTICED THAT THE NLG DOORS WOULD NOT CLOSE UPON MLG RETRACTION. RETRACTION MECHANISM WAS INSPECTED WITH NO ABNORMAL INDICATION EVIDENT. A/C JACKED & GEAR - [SDR BSY2003F00013](https://openairdocs.org/sdr/BSY2003F00013), Apr 15, 2003: WIRE. BROKEN. RT ENGINE OIL TEMPERATURE, BOUNCING AND OCCASIONALLY PEGS OUT. FOUND BROKEN WIRE AT OIL TEMP PROBE CONNECTOR REPAIRED WIRE OPS CHECK GOOD. - [SDR BSY2003F00002](https://openairdocs.org/sdr/BSY2003F00002), Jan 7, 2003: THROTTLE CABLE. BROKEN. LT ENGINE, NO THROTTLE CONTROL, SHUT ENGINE DOWN, LANDED NO PROBLEM. FOUND THROTTLE CABLE BROKEN, REMOVED AND REPLACED THROTTLE CABLE, OPS CHECKED GOOD. - [SDR BSY2003F00006](https://openairdocs.org/sdr/BSY2003F00006), Dec 25, 2002: SWITCH. INOPERATIVE. AIRCRAFT LANDED WITH SMOKE IN COCKPIT. FOUND PROP HEAT SWITCH CAUSING PROBLEM. REMOVED AND REPLACED SWITCH. OPS CHECKED GOOD. - [SDR BSY2002F00010](https://openairdocs.org/sdr/BSY2002F00010), Jun 7, 2002: LATCH. FAILED. ON TAKEOFF, CABIN DOOR POPPED OPEN ON TOP SIDE, RETURNED TO AIRPORT. REPLACED UPPER TOP DOOR HOOK AND CHANNEL ASSEMBLY REPLACED WORN DOOR HANDLE. - [SDR FPI2002F00004](https://openairdocs.org/sdr/FPI2002F00004), Jan 11, 2002: CHANNEL. CRACKED. UPPER U-CHANNEL ON ENGINE FIREWALL, BOTH LEFT AND RIGHT HAND ENGINE NACELLES. CRACK DEVELOPED WHERE ENGINE MOUNT BOLT RUNS THROUGH FIREWALL. PROBABLE CAUSE IS N - [SDR FPI2002F00006](https://openairdocs.org/sdr/FPI2002F00006), Jan 9, 2002: CHANNEL. CRACKED. UPPER U-CHANNEL ON ENGINE FIREWALL. CRACKS DEVELOPED WHERE ENGINE MOUNT BOLT RUNS THROUGH FIREWALL. PROBABLE CAUSE IS NORMAL ENGINE VIBRATION. - [SDR FPI2002F00002](https://openairdocs.org/sdr/FPI2002F00002), Jan 4, 2002: STARTER. FAILED. THE STARTER DRIVE FAILED TO ENGAGE OR EVEN ATTEMT TO TURN ENGINE AFTER BRINGING INTO HANGER AND WARMING UP IT STILL DID NOT ENGAGE. INSPECTED ENGINE OIL FILTER, - [SDR FPI2002F00000](https://openairdocs.org/sdr/FPI2002F00000), Dec 19, 2001: CHANNEL. CRACKED. THESE AIRCRAFT HAVE AN UPPER AND LOWER FIREWALL CHANNEL AND THE UPPER ALMOST ALWAYS CRACKS BELOW THE ENGINE MOUNT BOLTS. THIS AIRCRAFT HAD BOTH THE LEFT AND RIG - [SDR 20010501CW008](https://openairdocs.org/sdr/20010501CW008), Apr 3, 2001: THROTTLE CABLE. BROKEN. LEFT ENGINE THROTTLE CABLE STUCK AT HALF THROTTLE, FOUND BROKEN THROTTLE CABLE, REMOVED AND REPLACED CABLE ASSEMBLY. OPS CHECK GOOD. - [SDR 20010323CW006](https://openairdocs.org/sdr/20010323CW006), Feb 9, 2001: FUEL CELL. CONTAMINATED. LT ENGINE NOT MAKING FULL TO POWER. FOUND CONTAMINATED FUEL(WATER). DEFUELED AIRCRAFT, OPENED FUEL CELL COMPLETELY DRIED OUT TANK, REPLACED ORING AND FUEL CAP. - [SDR 20010205CW001](https://openairdocs.org/sdr/20010205CW001), Dec 20, 2000: CYLINDER. CRACKED. EXHAUST LEAK BY NR 4 CYLINDER EXHAUST GASKET. INSPECTED, FOUND 4 CYLINDER CRACKED BY EXHAUST VALVE AREA, INSTALLED 5-9-00, CYLINDER OVERHAULED 7-28-98, W/O 4419 All 68: https://openairdocs.org/engine/continental-io-520-cb/reports.md ## STCs that may be installed (OpenAirDocs) (44) 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 SE5583SW](https://openairdocs.org/stc/SE5583SW): Installation of fuel flow transducers (true-flow totalizer). Alcor LLC. Lists IO-520 Series - [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 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 SE09217SC](https://openairdocs.org/stc/SE09217SC): Installation of modified fuel injector nozzles. General Aviation Modifications Inc - [STC SE5785NM](https://openairdocs.org/stc/SE5785NM): Replacement of Teledyne Continental original camshaft with P/N 32122-2. B & B Aviation LLC - [STC SE70RM](https://openairdocs.org/stc/SE70RM): Installation of compressor bracket. Air Comm Corporation - [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc - [STC SE1186SW](https://openairdocs.org/stc/SE1186SW): Regrooving of pistons P/N 631475 or P/N 632585. Continental Motors, Inc - [STC SE2340SW](https://openairdocs.org/stc/SE2340SW): Installation of modified cylinder assemblies, barrels, piston, and repaired crankcases. Continental Motors, Inc - [STC SE5820SW](https://openairdocs.org/stc/SE5820SW): Installation of Airmotive exhaust valve, P/N AEC-637781. Continental Motors, Inc. Lists IO-520 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc - [STC SE09979SC](https://openairdocs.org/stc/SE09979SC): Modification of Teledyne Continental Motors IO-520-B, IO-520-BA, or IO-520-BB engine to an Ultimate Engines IO-550-B/UE engine. General Aviation Modifications, Inc - [STC SE01791LA](https://openairdocs.org/stc/SE01791LA): Conversion of the subject engines to incorporate modification of crankcase, replacing crankshaft assembly, main bearings, rod assembly, piston, fuel system, and fuel system adjustment. COLORADO AIR PARTS - [STC SE10746SC-D](https://openairdocs.org/stc/SE10746SC-D): Conversion of Teledyne Continental Motors (TCM) models IO-520-B, -BA, -BB to RAM model IO-550-B-RA engine, or conversion of TCM models IO-520-C, -CB to RAM model IO-550-C-RA engine. RAM Aircraft Limited Partnership - [STC SE267CH](https://openairdocs.org/stc/SE267CH): Installation of Slick Model 6309 and 6313 magnetos. Champion Aerospace LLC - [STC SE7325SW-D](https://openairdocs.org/stc/SE7325SW-D): Installation of crankcase modifications. RAM Aircraft Limited Partnership - [STC SE09846SC](https://openairdocs.org/stc/SE09846SC): Installation of S539800M30 starter adapter springs. Aircraft Specialties Services Inc - [STC SE487GL](https://openairdocs.org/stc/SE487GL): Installation of a fuel flow transducer. Shadin Company Inc - [STC SE02881AT](https://openairdocs.org/stc/SE02881AT): STC for the conversion of Teledyne Continental Motors (TCM) Models IO-520-B, -BA or -BB to AvPower Model IO-550-B-AP which has the same ratings and limitations as TCM Model IO-550-B, or the conversion of TCM Model IO-520-C or -CB to AvPower Model IO-550-C-AP which has the same ratings and limitations as TCM Model IO-550-C. Conversion of the Models IO-520-B, -BA, or -BB to the Model IO-550-B-AP shall be performed in accordance with AvPower Report AP1004-3 Master Parts List, Revision B dated March 26, 2004 and AvPower Report AP1004-6 Assembly Instructions, Revision B dated March 26, 2004, or later FAA approved revisions. Conversion of the Models IO-520-C or -CB to the Model IO-550-C-AP shall be performed in accordance with AvPower Report AP1004-4 Master Parts List, Revision B dated March 26, 2004 and AvPower Report AP1004-7 Assembly Instructions, Revision B dated March 26, 2004, or later FAA approved revisions. AERO Aviation Company - [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE09997SC](https://openairdocs.org/stc/SE09997SC): Modification of Teledyne Continental Motors IO-520-B or IO-520-BA or IO-520-BB engine. Barrett Performance Aircraft. Lists IO-520 Series - [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. Lists IO-520 Series - [STC SE09559SC](https://openairdocs.org/stc/SE09559SC): Installation of US Airparts roller rocker arm assemblies P/N US92E exhaust and US92I intake. US Airparts, Inc - [STC SE55WE](https://openairdocs.org/stc/SE55WE): Modification of fuel injection manifold valve P/N 626547 to the P/N 631427 or P/N 636326 configuration. AAR Aircraft Services Inc. d/b/a AAR Aircraft Services-Oklahoma. Lists IO-520 Series - [STC SE09319SC](https://openairdocs.org/stc/SE09319SC): Modify oil pan adding a new oil sump drain. Texas Skyways Inc. Lists IO-520 Series - [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation - [STC SE8687SW](https://openairdocs.org/stc/SE8687SW): Regrooving of pistons P/N 631475 or P/N 632585. Capehart Industries, Inc. Lists IO-520 Series - [STC SE00005DE](https://openairdocs.org/stc/SE00005DE): Installation of engine oil filter adapter compatable with SA4094NM Oilamatic, Inc. engine preoiling system. Oilamatic Inc - [STC SE8594SW](https://openairdocs.org/stc/SE8594SW): Installation of roller rocker arm P/N PE 92I intake and PE92E exhaust. Performance Engineering - [STC SE7422SW](https://openairdocs.org/stc/SE7422SW): Installation of Performance Engineering roller rocker arms. Performance Engineering - [STC SE2197CE](https://openairdocs.org/stc/SE2197CE): Add the following approved fuel: leaded & unleaded automotive gasoline 91 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved. Petersen Aviation Inc - [STC SE3812SW](https://openairdocs.org/stc/SE3812SW): Recontouring and polishing(porting) of intake manifold and exhaust parts and air flow balancing. High Performance Aircraft. Lists IO-520 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-520 Series - [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co. Lists IO-520 Series - [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists IO-520 Series - [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less. Bel-Ray Company, Inc. Lists IO-520 Series - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists IO-520 Series - [STC SE10746SC](https://openairdocs.org/stc/SE10746SC) (historical): Conversion of Teledyne Continental Motors (TCM) models IO-520-B, -BB to RAM model IO-550-B-RA engine, or conversion of TCM models IO-520-C, -CB to RAM model IO-550-C-RA engine. RAM Aircraft Limited Partnership - [STC SE7325SW](https://openairdocs.org/stc/SE7325SW) (historical): Installation of crankcase modifications. RAM Aircraft Limited Partnership --- 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.