# Continental IO-520-B

- Type: Engine model (FAA registry)
- Registry code: 17229
- Manufacturer (registry): CONT MOTOR
- Model: IO-520-B
- Engine type: Reciprocating
- Power: 285 hp
- Data sheet: [TCDS E5CE](https://openairdocs.org/tcds/E5CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 16 registered aircraft
- Page: https://openairdocs.org/engine/continental-io-520-b

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 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 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 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 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980
- [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 70-14-07](https://openairdocs.org/ad/70-14-07): Fuel Injection Pump · Continental Motors IO-360-A, IO-360-C, IO-360-D and 25 more. Effective Nov 22, 1974
- [AD 72-24-03](https://openairdocs.org/ad/72-24-03): Oil Filter Adapter · Continental Motors IO-360-A, IO-520-B, IO-520-C and 3 more. Effective Nov 15, 1972
- [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)
- [AD 77-13-22](https://openairdocs.org/ad/77-13-22): Crankcase Cracks · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 22 more

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 2022-04-04](https://openairdocs.org/ad/2022-04-04) (historical): 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 Mar 29, 2022
- [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 94-14-12](https://openairdocs.org/ad/94-14-12) (historical): Octane Aviation Gasoline · Teledyne Continental Motors A-65-8, C85-12, E185-11 and 68 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-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

## Registered aircraft (16)

- [N10CA](https://openairdocs.org/aircraft/N10CA): [Brunson Richard P](https://openairdocs.org/faa-owner/BRUNSON%20RICHARD%20P), [New Braunfels, TX](https://openairdocs.org/faa-place/TX/New%20Braunfels), built 2007, S/N E-3814
- [N1259M](https://openairdocs.org/aircraft/N1259M): [L A M Capital Management LLC](https://openairdocs.org/faa-owner/L%20A%20M%20CAPITAL%20MANAGEMENT%20LLC), [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan), built 1967, S/N CE-175
- [N167TF](https://openairdocs.org/aircraft/N167TF): [Whitney David W](https://openairdocs.org/faa-owner/WHITNEY%20DAVID%20W), [Ooltewah, TN](https://openairdocs.org/faa-place/TN/Ooltewah), built 1967, S/N D-8472
- [N2054W](https://openairdocs.org/aircraft/N2054W): [Verran Clinton T](https://openairdocs.org/faa-owner/VERRAN%20CLINTON%20T), [Rochester Hills, MI](https://openairdocs.org/faa-place/MI/Rochester%20Hills), built 1965, S/N D-7991
- [N2433T](https://openairdocs.org/aircraft/N2433T): [Nw Aircraft Sales & Lesing LLC](https://openairdocs.org/faa-owner/NW%20AIRCRAFT%20SALES%20%26%20LESING%20LLC), [Scappoose, OR](https://openairdocs.org/faa-place/OR/Scappoose), S/N NAV-4-2433
- [N2497T](https://openairdocs.org/aircraft/N2497T): [Hoogasian Stephen M](https://openairdocs.org/faa-owner/HOOGASIAN%20STEPHEN%20M), [Manassas, VA](https://openairdocs.org/faa-place/VA/Manassas), built 1973, S/N NAV-4-2497
- [N2521T](https://openairdocs.org/aircraft/N2521T): [Moore Kevin B](https://openairdocs.org/faa-owner/MOORE%20KEVIN%20B), [Lancaster, VA](https://openairdocs.org/faa-place/VA/Lancaster), built 1968, S/N NAV-4-2519
- [N277F](https://openairdocs.org/aircraft/N277F): [Rowland Maxwell J](https://openairdocs.org/faa-owner/ROWLAND%20MAXWELL%20J), [League City, TX](https://openairdocs.org/faa-place/TX/League%20City), built 1969, S/N CJ-16
- [N336NA](https://openairdocs.org/aircraft/N336NA): [Nickravesh Niknam J](https://openairdocs.org/faa-owner/NICKRAVESH%20NIKNAM%20J), [Saratoga, CA](https://openairdocs.org/faa-place/CA/Saratoga), built 1980, S/N E-480
- [N4856J](https://openairdocs.org/aircraft/N4856J): [N4856j LLC](https://openairdocs.org/faa-owner/N4856J%20LLC), [Boulder, CO](https://openairdocs.org/faa-place/CO/Boulder), built 1967, S/N D-8536
- [N6655G](https://openairdocs.org/aircraft/N6655G): [Right Wing Left Wing Flyers LLC](https://openairdocs.org/faa-owner/RIGHT%20WING%20LEFT%20WING%20FLYERS%20LLC), [Cleveland, GA](https://openairdocs.org/faa-place/GA/Cleveland), built 1968, S/N E-89
- [N7610N](https://openairdocs.org/aircraft/N7610N): [Harrison Danny L](https://openairdocs.org/faa-owner/HARRISON%20DANNY%20L), [Byrdstown, TN](https://openairdocs.org/faa-place/TN/Byrdstown), built 1968, S/N TC-1137
- [N843CM](https://openairdocs.org/aircraft/N843CM): [Lamar Lending LLC](https://openairdocs.org/faa-owner/LAMAR%20LENDING%20LLC), [League City, TX](https://openairdocs.org/faa-place/TX/League%20City), built 1975, S/N E-754
- [N858AL](https://openairdocs.org/aircraft/N858AL): [Finnegan Brian](https://openairdocs.org/faa-owner/FINNEGAN%20BRIAN), [Novato, CA](https://openairdocs.org/faa-place/CA/Novato), built 1990, S/N E2544
- [N8921U](https://openairdocs.org/aircraft/N8921U): [Lucy Donald E III](https://openairdocs.org/faa-owner/LUCY%20DONALD%20E%20III), [Newbury Park, CA](https://openairdocs.org/faa-place/CA/Newbury%20Park), built 1965, S/N D-7911
- [N95WD](https://openairdocs.org/aircraft/N95WD): [Burleson Gary L](https://openairdocs.org/faa-owner/BURLESON%20GARY%20L), [Myrtle Beach, SC](https://openairdocs.org/faa-place/SC/Myrtle%20Beach), built 1971, S/N CE-322

## NTSB investigations (5)

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 WPR24LA174](https://openairdocs.org/ntsb/WPR24LA174), Jun 1, 2024: Beech 35-C33A (N1259M), San Diego, CA, substantial damage. Probable cause: A partial loss of engine power due to water contamination of the fuel system.
- [NTSB MKC82FCG09](https://openairdocs.org/ntsb/MKC82FCG09), Nov 22, 1981: Beech V35 (N2054W), East Lynne, MO, substantial damage
- [NTSB CHI79DER04](https://openairdocs.org/ntsb/CHI79DER04), Jul 3, 1979: Beech E33C (N277F), Star Prairie, WI, substantial damage
- [NTSB DEN78FTC24](https://openairdocs.org/ntsb/DEN78FTC24), Jun 11, 1978: Beech V35 (N4856J), Jackson Hole, WY, substantial damage
- [NTSB CHI74DEA25](https://openairdocs.org/ntsb/CHI74DEA25), Jan 14, 1974: Beech V35 (N4856J), Indianapolis, IN, substantial damage

## FAA accident and incident reports (8)

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 20240601007129A](https://openairdocs.org/incident/20240601007129A), Jun 1, 2024: Beech 35-C33A (N1259M), San Diego, CA, Substantial damage. On June 1, 2024 aircraft had a hard landing on runway 28R at kmyf causing nose gear to detach and damaging propeller and left wing. There was substantial…
- [Incident 20060625015219I](https://openairdocs.org/incident/20060625015219I), Jun 25, 2006: Beech V35 (N2054W), Detroit/Grosse, MI, Minor damage. (-23) Aircraft landed with landing gear in the retracted position.
- [Incident 19890813049239I](https://openairdocs.org/incident/19890813049239I), Aug 13, 1989: Beech V35 (N2054W), Cape Girardeau, MO, Minor damage. Failed to use checklist before landing with gear retracted.
- [Incident 19820922059879I](https://openairdocs.org/incident/19820922059879I), Sep 22, 1982: Beech V35 (N2054W), Coffeyville, KS, Minor damage. Lost electrical power. Failed to manually extend gear full down for landing. Found broken alternator field wire.
- [Accident 19811122000829A](https://openairdocs.org/incident/19811122000829A), Nov 22, 1981: Beech V35 (N2054W), East Lynne, MO, Substantial damage. Aircraft landed gear up. Pilot did not check gear lights.
- [Accident 19790703022229A](https://openairdocs.org/incident/19790703022229A), Jul 3, 1979: Beech E33C (N277F), Star Prairie, WI, Substantial damage. Crosswind landing on wet sod runway. Unable to stop. Ran off departure end into a ditch.
- [Accident 19780611035219A](https://openairdocs.org/incident/19780611035219A), Jun 11, 1978: Beech F35 (N4856J), Jackson Hole, WY, Substantial damage. Airworthiness directive on propeller not complied with.
- [Accident 19740114001269A](https://openairdocs.org/incident/19740114001269A), Jan 14, 1974: Beech V35 (N4856J), Indianapolis, IN, Substantial damage. Pilot stated ctl loss due lack of currency.

## Service difficulty reports (76, newest 50)

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

- [SDR 2016FA0000648](https://openairdocs.org/sdr/2016FA0000648), Dec 8, 2016: LIFTER. DAMAGED. THE SURFACE OF THE LIFTER THAT CONTACT THE CAMSHAFT ARE SPALLED AND CORRODED. REPLACED THE LIFTERS.
- [SDR 2013FA0000618](https://openairdocs.org/sdr/2013FA0000618), Oct 27, 2013: CIRCUIT BREAKER. FAILED. PILOT REPORTED THAT THE BEACON LIGHT WAS INOPERATIVE. TROUBLESHOT SYSTEM AND DISCOVERED BEACON LIGHT CIRCUIT BREAKER FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR 2012FA0000640](https://openairdocs.org/sdr/2012FA0000640), Sep 11, 2012: CHECK VALVE. OBSTRUCTED. AT 15,000 FT IN CRUISE, PILOT EXPERIENCED DROP IN ENGINE OIL PRESSURE AND DROP IN MANIFOLD PRESSURE. ON LANDING, FOUND ENGINE EXHAUST COATED WITH ENGINE OIL AND
- [SDR CA110826006](https://openairdocs.org/sdr/CA110826006), Aug 24, 2011: BOLT. CORRODED. (CAN) HEAD OF BOLT CORRODED.
- [SDR 2007FA0000876](https://openairdocs.org/sdr/2007FA0000876), Sep 19, 2007: TRANSMITTER. UNRELIABLE. AIRCRAFT LANDED WITH ZERO OIL PRESSURE INDICATION. AFTER TESTING WITH DIRECT READING GAUGE IT WAS DETERMINED THAT THE ACTUAL ENGINE OIL PRESSURE WAS WITHIN LIMI
- [SDR GYN2006F00000](https://openairdocs.org/sdr/GYN2006F00000), Aug 16, 2006: ALTERNATOR. DAMAGED. REMOVED ALTERNATOR PN 1100715, SN 5050822, FOR REPLACEMENT DUE TO NO VOLTAGE OUTPUT, INSPECTED ALTERNATOR AND CRANKSHAFT GEARS BEFORE INSTALLING ANOTHER SERVICE
- [SDR 2006FA0000527](https://openairdocs.org/sdr/2006FA0000527), May 21, 2006: PUMP. FAILED. VACUUM PUMP FAILURE INFLIGHT, FIRST NOTICED ATTITUDE CHANGE (STARTED DECENDING RAPIDLY) (AUTOPILOT ENGAGED).
- [SDR AU510001901](https://openairdocs.org/sdr/AU510001901), Dec 12, 2005: DRIVE SHAFT. SHEARED. (AUS) VACUUM PUMP FAILED. INVESTIGATION FOUND THE PUMP JAMMED AND FULL OF CARBON VANE DEBRIS. DRIVE SHAFT FAILED AT SPLINED SECTION AND NOT AT SHEAR POINT AS DE
- [SDR 2005FA0000738](https://openairdocs.org/sdr/2005FA0000738), Mar 28, 2005: CYLINDER. CRACKED. THIS CYLINDER CRACKED ALL THE WAY AROUND THE TOP OF THE BARRELL. DATE OF OCCURANCE 04/26/2004. (K)
- [SDR AUS20040181](https://openairdocs.org/sdr/AUS20040181), Mar 10, 2004: SCREW. WRONG PART. (AUS) ELEVATOR CONTROL CABLE RUBBING ON SCREW. INVESTIGATION FOUND (A LONGER THAN NORMAL) SCREW HOLDING THE FORWARD CABIN FLOOR IN POSITION. INCORRECT SCREW HAD
- [SDR AUS20040044](https://openairdocs.org/sdr/AUS20040044), Jan 27, 2004: ATTACH FITTING. CORRODED. (AUS) RT WING UPPER AFT ATTACHMENT FITTING CORRODED. MAXIMUM DEPTH OF CORROSION 1.27MM (0.050IN). FOUND DURING INSPECTION IAW AD.
- [SDR AUS20031267](https://openairdocs.org/sdr/AUS20031267), Dec 10, 2003: SKIN. DAMAGED. (AUS) FOLLOWING REMOVAL OF THE LT WING THE UPPER SKIN AND INNER RIB FLANGE WAS FOUND TO BE GROUND AWAY TO THE EXTENT THAT THE RIVET EDGE DISTANCE WAS COMPROMISE
- [SDR AUS20031109](https://openairdocs.org/sdr/AUS20031109), Oct 30, 2003: LONGERON. CRACKED. (AUS) LT FUSELAGE LONGERON CRACKED IN AREA APPROXIMATELY 6.35MM (0.25IN) AFT OF FIREWALL.
- [SDR AUS20031089](https://openairdocs.org/sdr/AUS20031089), Oct 22, 2003: BOLT. DAMAGED. (AUS) LT WING UPPER FORWARD ATTACHMENT BOLT THREADS DAMAGED.
- [SDR AUS20030670](https://openairdocs.org/sdr/AUS20030670), Jun 22, 2003: CYLINDER. CRACKED. (AUS) NR 2 CYLINDER CRACKED BETWEEN VALVES. NR 3 AND NR 4 CYLINDERS REMOVED FOR LOW COMPRESSION.
- [SDR AUS20030542](https://openairdocs.org/sdr/AUS20030542), May 29, 2003: SPAR. CRACKED. (AUS) WING CARRY THROUGH ASSEMBLY PNO 002-430013-9 CRACKED ON LOWER FACES OF FORWARD WEB PNO 002-430018-1. CRACKS ARE BETWEEN HUCKBOLTS AND JOIN THREE HUCK BOLT
- [SDR FTU2003F00008](https://openairdocs.org/sdr/FTU2003F00008), Apr 24, 2003: SPRING. BROKEN. CUSTOMER WAS COMPLAINING OF A ROUGH RUNNING ENGINE DUE TO A BAD LEFT MAGNETO, REMOVED MAGNETO AND FOUND THE IMPULSE COUPLING SPRING WAS BROKEN. COUPLING SPRING 
- [SDR XGN2003F00000](https://openairdocs.org/sdr/XGN2003F00000), Mar 1, 2003: BEARING. FAILED. IN FLIGHT, AIRCRAFT LANDED WITHOUT INCIDENT. THE ALTERNATOR DRIVE END BEARING FAILED CAUSING THE ALTERNATOR ROTOR ASSEMBLY WITH THE DRIVEN GEAR TO EXTEND INTO T
- [SDR AUS20021032](https://openairdocs.org/sdr/AUS20021032), Sep 11, 2002: BRACKET. CORRODED. (AUS) RH MAIN LANDING GEAR STRUT SQUAT SWITCH ATTACHMENT BRACKETCORRODED THROUGH.
- [SDR AUS20020653](https://openairdocs.org/sdr/AUS20020653), Jul 3, 2002: CYLINDER. LEAKING. (AUS) ENGINE CYLINDER LEAKING FROM HEAD/BARREL JOINT.
- [SDR VJ32002F00050](https://openairdocs.org/sdr/VJ32002F00050), Jun 28, 2002: FLOW DIVIDER. FAILED. AT NORMAL POWER SETTINGS THE ENGINE RAN ROUGH AT 6000 TO 7000 FEET. REMOVED FUEL FLOW MANIFOLD VALVE AND INSTALLED NEW FUEL FLOW MANIFOLD VALVE. GROUND OPERATIO
- [SDR 2002FA0000771](https://openairdocs.org/sdr/2002FA0000771), Jun 11, 2002: FLOW DIVIDER. FLUCTUATES. FUEL FLOW FLUCTUATES IN-FLIGHT AND THE ENGINE WAS ROUGH RUNNING AT ALTITUDE, AT LOW ALTITUDE THE ENGINE WAS SMOOTH IN OPERATION. OPERATION CHECK OF ENGINE ON TH
- [SDR VJ32002F00004](https://openairdocs.org/sdr/VJ32002F00004), Jan 11, 2002: DISTRIBUTOR BLK. DAMAGED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. CARBON BRUSH WEAR ON THE SIDE OF DIST
- [SDR VJ32001F00013](https://openairdocs.org/sdr/VJ32001F00013), Dec 13, 2001: RELAY. JAMMED. DYNAMIC RELAY CONTROLS THE LANDING GEAR MOTOR. THIS UNIT IS INCONSISTENT IN CONTROL OF MOTOR WHEN POWER TO THE RELAY CONTROL IS TURNED OFF BY THE ACTUATOR SWITC
- [SDR VJ32001F00014](https://openairdocs.org/sdr/VJ32001F00014), Dec 13, 2001: DISTRIBUTOR. MELTED. REMOVED MAGNETO FROM ENGINE FOR 500 HOUR. INSPECTION. INSPECTION FOUND THAT THE PLASTIC WAS MELTED ON THE DISTRIBUTOR CAP. MAGNETO WAS SENT TO MFG.
- [SDR VJ32002F00000](https://openairdocs.org/sdr/VJ32002F00000), Dec 11, 2001: DISTRIBUTOR. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBTOR BLOCK ASSEMBLY SENT TO MFG
- [SDR VJ32002F00001](https://openairdocs.org/sdr/VJ32002F00001), Dec 11, 2001: LIFTER. COLLAPSED. ENGINE HAD A CLICKING NOISE AT LOW RPM. REMOVED NR 2 ROCKER COVER AND FOUND THAT THE INTAKE LIFTER WAS COLLAPSED, REMOVED LIFTER BODY AND INSTALLED NEW LIFTER, 
- [SDR 2001FA0000639](https://openairdocs.org/sdr/2001FA0000639), Nov 29, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW THE MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT T
- [SDR 2001FA0000642](https://openairdocs.org/sdr/2001FA0000642), Nov 29, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW THE MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK ASSEMBLY FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMB
- [SDR 2001FA0000640](https://openairdocs.org/sdr/2001FA0000640), Nov 28, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW THE MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. NEW DISTRIBUTOR BLOCK ASSEMBLY IN
- [SDR 2001FA0000641](https://openairdocs.org/sdr/2001FA0000641), Nov 28, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT TO MF
- [SDR 2001FA0000566](https://openairdocs.org/sdr/2001FA0000566), Nov 16, 2001: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW THE MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT T
- [SDR 2001FA0000567](https://openairdocs.org/sdr/2001FA0000567), Nov 15, 2001: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY INSTALLED 
- [SDR 2001FA0000568](https://openairdocs.org/sdr/2001FA0000568), Nov 15, 2001: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT TO MF
- [SDR 2001FA0000569](https://openairdocs.org/sdr/2001FA0000569), Nov 15, 2001: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY INSTALLED 
- [SDR 2001FA0000570](https://openairdocs.org/sdr/2001FA0000570), Nov 15, 2001: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT TO MF
- [SDR VJ32001F00010](https://openairdocs.org/sdr/VJ32001F00010), Nov 9, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW THE MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT T
- [SDR VJ32001F00011](https://openairdocs.org/sdr/VJ32001F00011), Nov 9, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY INSTALLED 
- [SDR VJ32001F00012](https://openairdocs.org/sdr/VJ32001F00012), Nov 9, 2001: DISTRIBUTOR BLK. FAILED. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. DISTRIBUTOR BLOCK ASSEMBLY SENT TO MF
- [SDR VJ32002F00002](https://openairdocs.org/sdr/VJ32002F00002), Jul 3, 2001: ALTERNATOR. INOPERATIVE. ALTERNATOR WILL NOT CARE THE LOAD BELOW 1000 RPM. EMITS A NOISE IN THE HEADSET. EMITS A NOISE IN THE HEADSET. ALTERNATOR SENT THE MFG FOR WARRANTY.
- [SDR AU010352](https://openairdocs.org/sdr/AU010352), Apr 9, 2001: CONTROL CABLE. BROKEN. (AUS) AILERON THREADED CABLE AND FITTING SEPARATED APPROXIMATELY MIDWAY BETWEEN THE THREADED END AND THE SWAGED NUT.
- [SDR AU001028](https://openairdocs.org/sdr/AU001028), Oct 10, 2000: HUB. FAILED. (AUS) ALTERNATOR FLEXIBLE DRIVE COUPLING FAILED. (X)
- [SDR AU001005](https://openairdocs.org/sdr/AU001005), Oct 9, 2000: FITTING. RUSTED. (AUS) ENGINE DRIVEN FUEL PUMP CONTAMINATED. INVESTIGATION FOUND CONTAMINATION WAS RUST FROM THE INTERNAL BORES OF THE STEEL END FITTINGS OF THE FLEXIBLE HOSES A
- [SDR AU001008](https://openairdocs.org/sdr/AU001008), Oct 4, 2000: PUMP. CONTAMINATED. (AUS) ENGINE DRIVEN FUEL PUMP VAPOR SEPARATOR CHAMBER CONTAINED A SMALL PIECE OF UNIDENTIFIABLE CONTAMINANT. REF: OPER CNTRL NR AU001005 FOR SUSPECTED ORIGIN OF
- [SDR CA000621025](https://openairdocs.org/sdr/CA000621025), Jun 13, 2000: BLADE. CORRODED. (CAN) FOUND CORROSION ON THE BLADE THREADS DURING THE CORROSIION INSPECTION. BLADES REPLACED WITH USED SERVICEABLE. IN ACCORDANCE WITH MCCAULEY MANUAL 720415.
- [SDR 20000531SH017](https://openairdocs.org/sdr/20000531SH017), May 11, 2000: HUB. CRACKED. EDDY CURRENT AND PENETRANT TESTING INDICATION IN THREAD AREA. (X)
- [SDR 20000531SH018](https://openairdocs.org/sdr/20000531SH018), May 11, 2000: NUT. FAILED. PENETRANT TESTING INDICATION IN O-RING AREA. (X)
- [SDR AU000153](https://openairdocs.org/sdr/AU000153), Mar 27, 2000: RIB. CRACKED. (AUS) LT AND RT FLAP RIBS CRACKED. RIBS ARE LOCATED IMMEDIATELY BENEATH THE FLAP ACTUATING BRACKET.
- [SDR AU000154](https://openairdocs.org/sdr/AU000154), Mar 21, 2000: RIB. CRACKED. (AUS) LT AND RT FLAP RIBS CRACKED. RIBS ARE LOCATED IMMEDIATELY BENEATH THE FLAP ACTUATING BRACKET.
- [SDR AU000168](https://openairdocs.org/sdr/AU000168), Feb 10, 2000: UPLOCK. CORRODED. (AUS) LANDING GEAR UPLOCK ACTUATING BOLT HOLE CORRODED AND WORN.

All 76: https://openairdocs.org/engine/continental-io-520-b/reports.md

## STCs that may be installed (OpenAirDocs) (56, first 50)

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 SE94WE](https://openairdocs.org/stc/SE94WE): Installation of oil fitting(AN-823-5D) in rocker box cover. Airwolf Filter Corporation
- [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 SE8677SW](https://openairdocs.org/stc/SE8677SW): Installation of Garrett/Airesearch Model TE0659 turbocharger. Western Skyways, 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 SE34WE](https://openairdocs.org/stc/SE34WE): Installation of Electro-Coatings, Inc., piston rings on Continental pistons. 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 SE993SO](https://openairdocs.org/stc/SE993SO): Installation of fuel line filters into the individual fuel injector lines in accordance with Beryl D Shannon Aviation Specialties, Inc. Installations Instructions BI 2500, approved May 24, 1976, or later FAA approved revision. D'Shannon Products Ltd
- [STC SE267CH](https://openairdocs.org/stc/SE267CH): Installation of Slick Model 6309 and 6313 magnetos. Champion Aerospace LLC
- [STC SE09846SC](https://openairdocs.org/stc/SE09846SC): Installation of S539800M30 starter adapter springs. Aircraft Specialties Services Inc
- [STC SE443GL](https://openairdocs.org/stc/SE443GL): Incorporation of a fuel flow transducer. Shadin Avionics
- [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 SE5222NM](https://openairdocs.org/stc/SE5222NM): Modification to teledyne Continental engine for the installation of turbonormalizing system. Engine Technologies Inc
- [STC SE09289SC](https://openairdocs.org/stc/SE09289SC): Installation of modified fuel injector nozzles. General Aviation Modifications, Inc
- [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 SE3816SW](https://openairdocs.org/stc/SE3816SW): Install Airesearch turbocharger and intercooler. Colorado STC Development
- [STC SE5177NM](https://openairdocs.org/stc/SE5177NM): Replacement camshaft P/N629726A3 with camshaft P/N 32122-2. Ritter Cams Inc
- [STC SE3757SW](https://openairdocs.org/stc/SE3757SW): Installation of two Rotomaster turbo-chargers, one for each bank of cylinders. Hughes Aviation Services
- [STC SE680NE](https://openairdocs.org/stc/SE680NE): Installation of Auto-Vac-4 primary vacuum system. Raymond Ives
- [STC SE400NE](https://openairdocs.org/stc/SE400NE): Installation of Auto-vac-2 instrument vacuum system. Raymond Ives
- [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 SE2514NM](https://openairdocs.org/stc/SE2514NM): Installation of Schwitzer Model4LD turbocharger. Douthitt Robert

All 56: https://openairdocs.org/engine/continental-io-520-b/stcs.md

---
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.