# Continental TSIO-520-R

- Type: Engine model (FAA registry)
- Registry code: 17267
- Manufacturer (registry): CONT MOTOR
- Model: TSIO-520-R
- Engine type: Reciprocating
- Power: 310 hp
- Data sheet: [TCDS E8CE](https://openairdocs.org/tcds/E8CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 22 registered aircraft
- Page: https://openairdocs.org/engine/continental-tsio-520-r

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 2010-07-08](https://openairdocs.org/ad/2010-07-08): Turbochargers · Kelly Aerospace Energy Systems HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 137 more. Effective Apr 19, 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 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 80-22-05](https://openairdocs.org/ad/80-22-05): Crankshaft Front Oil Seal · Continental Motors TSIO-520-M, TSIO-520-P and TSIO-520-R. Effective Oct 24, 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 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 77-05-04](https://openairdocs.org/ad/77-05-04): Crankshaft · Continental Motors IO-470-L, IO-520-D, IO-520-F and 6 more. Effective Mar 11, 1977
- [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 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 (22)

- [N100YN](https://openairdocs.org/aircraft/N100YN): [Enrique Angulo](https://openairdocs.org/faa-owner/ENRIQUE%20ANGULO), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego), S/N 21061236
- [N10HM](https://openairdocs.org/aircraft/N10HM): [Aggst LLC](https://openairdocs.org/faa-owner/AGGST%20LLC), [Shingle Springs, CA](https://openairdocs.org/faa-place/CA/Shingle%20Springs), built 1978, S/N 21062908
- [N16ZA](https://openairdocs.org/aircraft/N16ZA): [Visser Johannes Christoffel](https://openairdocs.org/faa-owner/VISSER%20JOHANNES%20CHRISTOFFEL), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), built 1980, S/N 21063807
- [N1815H](https://openairdocs.org/aircraft/N1815H): [Plane Fun Inc Tr Trustee](https://openairdocs.org/faa-owner/PLANE%20FUN%20INC%20TR%20TRUSTEE), [Snellville, GA](https://openairdocs.org/faa-place/GA/Snellville), built 1976, S/N 21061148
- [N213GC](https://openairdocs.org/aircraft/N213GC): [Eastern Stearman Inc Trustee](https://openairdocs.org/faa-owner/EASTERN%20STEARMAN%20INC%20TRUSTEE), [Leesburg, VA](https://openairdocs.org/faa-place/VA/Leesburg), built 1978, S/N 21062368
- [N243RZ](https://openairdocs.org/aircraft/N243RZ): [Best Aircraft Deals LLC](https://openairdocs.org/faa-owner/BEST%20AIRCRAFT%20DEALS%20LLC), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1983, S/N 21064961
- [N297DR](https://openairdocs.org/aircraft/N297DR): [Mingus Mason](https://openairdocs.org/faa-owner/MINGUS%20MASON), [Scottsville, KY](https://openairdocs.org/faa-place/KY/Scottsville), built 1978, S/N 62398
- [N308BC](https://openairdocs.org/aircraft/N308BC): [Mike Kilo Foxtrot LLC](https://openairdocs.org/faa-owner/MIKE%20KILO%20FOXTROT%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1979, S/N 21063618
- [N30VG](https://openairdocs.org/aircraft/N30VG): [Geoterra Inc](https://openairdocs.org/faa-owner/GEOTERRA%20INC), [Eugene, OR](https://openairdocs.org/faa-place/OR/Eugene), built 1980, S/N 21063856
- [N344AJ](https://openairdocs.org/aircraft/N344AJ): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1980, S/N 21063891
- [N48AL](https://openairdocs.org/aircraft/N48AL): [Hutchinson Scott](https://openairdocs.org/faa-owner/HUTCHINSON%20SCOTT), [Missouri City, TX](https://openairdocs.org/faa-place/TX/Missouri%20City), built 1976, S/N 21061658
- [N5495A](https://openairdocs.org/aircraft/N5495A): [Rzs Enterprises Inc](https://openairdocs.org/faa-owner/RZS%20ENTERPRISES%20INC), [Finley, ND](https://openairdocs.org/faa-place/ND/Finley), built 1979, S/N 21063470
- [N54DZ](https://openairdocs.org/aircraft/N54DZ): [Mcdonald Donald F](https://openairdocs.org/faa-owner/MCDONALD%20DONALD%20F), [Greer, SC](https://openairdocs.org/faa-place/SC/Greer), built 1983, S/N 21064820
- [N6362A](https://openairdocs.org/aircraft/N6362A): [Millican Clifford A](https://openairdocs.org/faa-owner/MILLICAN%20CLIFFORD%20A), [Burleson, TX](https://openairdocs.org/faa-place/TX/Burleson), built 1979, S/N 21063523
- [N6394D](https://openairdocs.org/aircraft/N6394D): [Manzur Miguel Antonio](https://openairdocs.org/faa-owner/MANZUR%20MIGUEL%20ANTONIO), [Mcallen, TX](https://openairdocs.org/faa-place/TX/Mcallen), built 1977, S/N 21062010
- [N685GT](https://openairdocs.org/aircraft/N685GT): [Eatmb Air Inc Trustee](https://openairdocs.org/faa-owner/EATMB%20AIR%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1979, S/N 21063361
- [N6970N](https://openairdocs.org/aircraft/N6970N): [Seitz Thomas J](https://openairdocs.org/faa-owner/SEITZ%20THOMAS%20J), [Mission, KS](https://openairdocs.org/faa-place/KS/Mission), built 1979, S/N 21063179
- [N718AP](https://openairdocs.org/aircraft/N718AP): [Aviation Trust Company LLC Trustee](https://openairdocs.org/faa-owner/AVIATION%20TRUST%20COMPANY%20LLC%20TRUSTEE), [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City), built 1977, S/N 21061857
- [N734JC](https://openairdocs.org/aircraft/N734JC): built 1977, S/N 21062107
- [N761MB](https://openairdocs.org/aircraft/N761MB): [Gump Timothy K](https://openairdocs.org/faa-owner/GUMP%20TIMOTHY%20K), [Dalton Gardens, ID](https://openairdocs.org/faa-place/ID/Dalton%20Gardens), built 1977, S/N 21062354
- [N888KA](https://openairdocs.org/aircraft/N888KA): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1975, S/N 21061046
- [N994CD](https://openairdocs.org/aircraft/N994CD): [Navair LLC](https://openairdocs.org/faa-owner/NAVAIR%20LLC), [Mount Vernon, OH](https://openairdocs.org/faa-place/OH/Mount%20Vernon), built 1979, S/N 21063312

## 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 ERA21LA268](https://openairdocs.org/ntsb/ERA21LA268), May 19, 2021: Cessna T210 (N7568N), Bloomsburg, PA, substantial damage. Probable cause: The pilot’s unstable approach and delayed go-around attempt, which resulted in a porpoised landing, a nose landing gear collapse, and runway excursion.
- [NTSB WPR16LA030](https://openairdocs.org/ntsb/WPR16LA030), Nov 19, 2015: Cessna T210N (N91HC), La Verne, CA, substantial damage. Probable cause: The total loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN14LA194](https://openairdocs.org/ntsb/CEN14LA194), Apr 6, 2014: Cessna T210M (N761BT), Lee's Summit, MO, substantial damage. Probable cause: The pilots’ inadequate preflight planning and fuel management, which resulted in fuel exhaustion, a loss of engine power, and a forced landing on a soft field. Contributing to the accident was the…
- [NTSB ERA12LA224](https://openairdocs.org/ntsb/ERA12LA224), Mar 14, 2012: Cessna T210J (N2275R), Rabbit Hash, KY, substantial damage. Probable cause: The pilot's inadequate preflight and in-flight fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB LAX89LA187](https://openairdocs.org/ntsb/LAX89LA187), May 12, 1989: Cessna T210N (N7568N), Monterey, CA, substantial damage. Probable cause: THE PILOTS IMPROPER USE OF THE CHECKLIST WHEN HIS ATTENTION WAS DIVERTED.

## FAA accident and incident reports (7)

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 20210519015719A](https://openairdocs.org/incident/20210519015719A), May 19, 2021: Cessna T210N (N7568N), Bloomsburg, PA, Substantial damage. 05/19/2021: N7568N crashed at N13 following an unsuccessful landing attempt. Pilot stated the plane porpised several times and the nose gear collapsed before…
- [Accident 20151119022499A](https://openairdocs.org/incident/20151119022499A), Nov 19, 2015: Cessna T210N (N91HC), Pomona, CA, Destroyed. This aircraft departed camarillo-kcma airport at 09:11 hours with full fuel tanks according to an interview with the mishap pilot. He was engaged in high…
- [Accident 20140406005159A](https://openairdocs.org/incident/20140406005159A), Apr 6, 2014: Cessna T210M (N761BT), Lee'S Summit, MO, Substantial damage. This aircraft was enroute from jacksonville executive airport (kcrg) to Lee'S Summit Municipal Airport (klxt). During the descent into klxt, the engine lost…
- [Accident 20120313005829A](https://openairdocs.org/incident/20120313005829A), Mar 13, 2012: Cessna T210J (N2275R), Rabbit Hash, KY, Destroyed. Received call from gl roc on 03/13/2012 @ 2345 for this accident. Arrived at scene on 03/14/2012 @ 0745. Accident investigation revealed that aircraft had no…
- [Incident 19910413022579I](https://openairdocs.org/incident/19910413022579I), Apr 13, 1991: Cessna T210N (N5495A), Corvallis, OR, Minor damage. Pilot forgot to lower landing gear and landed gear up.
- [Accident 19890512011399A](https://openairdocs.org/incident/19890512011399A), May 12, 1989: Cessna T210N (N7568N), Monterey, CA, Substantial damage. Landed gear up. Was distracted by radio transmissions. Failed to extend the landing gear.
- [Incident 19840312015659I](https://openairdocs.org/incident/19840312015659I), Mar 12, 1984: Cessna T210M (N10HM), Mountainair, NM. Ran out of fuel en route. Failed to ascertain fuel supply for round robin trip. Landed on a highway.

## Service difficulty reports (129, newest 50)

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

- [SDR 2024FA0000620](https://openairdocs.org/sdr/2024FA0000620), Aug 18, 2024: ALTERNATOR. LOOSE. WE RECENTLY REPLACED AN ALTERNATOR DUE TO THE CHARGING SYSTEM DROPPING OUT IN FLIGHT, AND UPON EXAMINATION OF THE REMOVED ONE, IT WAS FOUND THAT TWO OF THE FOUR
- [SDR 2024FA0000594](https://openairdocs.org/sdr/2024FA0000594), Aug 13, 2024: LIFTER. CORRODED. RECEIVED FACTORY REMANUFACTURED TSIO520 R9B FROM CAT. PRIOR TO REMOVING THE ENGINE FROM THE SHIPPING CRATE A PITTED AND MARRED LIFTER WAS DISCOVERED. ENGINE SN 
- [SDR M2LA201806221001](https://openairdocs.org/sdr/M2LA201806221001), Jun 11, 2018: CYLINDER. CRACKED. ACFT STARTED AND RUNNING FOR A TRAINING FLIGHT, PILOTS NOTICED A VIBRATION OF THE ENGINE AND NO CYLINDER HEAD TEMP OR EXHAUST TEMP ON NR 6 CYLINDER IAW THE ENGI
- [SDR 2017FA0000410](https://openairdocs.org/sdr/2017FA0000410), Aug 10, 2017: ALTERNATOR. FAILED. REBUILT ALTERNATOR WAS INSTALLED. DURING A 50/100 HOUR INSPECTION FOR A NORMAL TBO REPLACEMENT, IT WAS REMOVED FROM THE ACFT DUE TO FAILURE AT AIRCRAFT TT 6680.
- [SDR 2017F00155](https://openairdocs.org/sdr/2017F00155), Jul 11, 2017: FUEL NOZZLE. CLOGGED. POWER LOSS AFTER TAKEOFF RESULTING IN RETURN TO AIRPORT. FUEL FLOW WAS REPORTED HIGH AND MANIFOLD PRESSURE NORMAL. SUSPECTED PARTIALLY PLUGGED FUEL INJECTOR NOZ
- [SDR 2016FA0000584](https://openairdocs.org/sdr/2016FA0000584), Nov 15, 2016: ALTERNATOR. LOW VOLTAGE. VOLT METER INDICATED A DISCHARGE AT 1000 RPM. NORMAL VOLT AT 1000RPM AS PER CHECK SHOULD BE 28.5+-5. VOLT METER INDICATED AT 1000 RPM 25.0 AMPS 37. AT 1700 RPM 
- [SDR 2015FA0000492](https://openairdocs.org/sdr/2015FA0000492), Oct 12, 2015: CONDENSER. FAILED. FOUND BAD CONDENSOR ON MAGNETO, SN 14020225 IN JULY 2014. PART TT APPROXIMATELY 16 HOURS. ON OCTOBER 9, 2015 FOUND BAD CONDENSOR ON WARRANTY REPLACEMENT MAGNETO
- [SDR 2015FA0000493](https://openairdocs.org/sdr/2015FA0000493), Oct 12, 2015: COIL. FAILED. MAGNETO, SN 14020225 FAILED IN FLIGHT IN JULY 2014. PART TT APPROXIMATELY 16 HOURS. FOUND BAD CONDENSOR ON WARRANTY REPLACEMENT MAGNETO, SN 14020227, PART TT 18
- [SDR NF2R201812210002](https://openairdocs.org/sdr/NF2R201812210002), Apr 16, 2015: LIFTER. GALLED. #1 CYLINDER LOW COMPRESSION 59/80 LEAKING THROUGH EXHAUST VALVE. FOUND LIFTERS SHOWING PITTING AND STRESS.
- [SDR 2014FA0000711](https://openairdocs.org/sdr/2014FA0000711), Dec 16, 2014: LINE. LEAKING. FUEL LINE, THAT GOES FROM THE FUEL SELECTOR TO THE FUEL BOOST PUMP WAS FOUND LEAKING PROFUSELY. HOSE LOOKED TO BE ORIGINAL EQUIPMENT.
- [SDR 4DSR201411240001](https://openairdocs.org/sdr/4DSR201411240001), Nov 24, 2014: CONTROL UNIT. SEIZED. DURING 50 HOUR INSPECTION, MECHANIC FOUND THE MIXTURE CONTROL OPERATION TO BE VERY STIFF. FOUND THE MIXTURE CONTROL UNIT ON ENGINE SEIZED AND VERY HARD TO MOVE 
- [SDR 2014FA0000558](https://openairdocs.org/sdr/2014FA0000558), Sep 25, 2014: FUEL LINE. LEAKING. FUEL LINE HAS DARK STAIN HALF WAY BETWEEN ATTACHMENT AND FITTING. LINE PITTED UNDER PLASTIC ANTI-CHAFING MATERIAL, FUEL WEEP CAUSING STAIN. FOUND DURING ANNUAL.
- [SDR 2014FA0000074](https://openairdocs.org/sdr/2014FA0000074), Feb 14, 2014: SPAR. LOOSE. DURING ANNUAL INSPECTION, FOUND MOVEMENT IN THE RT WING SPAR FITTINGS, BETWEEN THE RT WING MAIN SPAR ATTACH BRACKETS AND THE FUSELAGE CARRY-THROUGH SPAR ATTACH 
- [SDR 2014FA0000047](https://openairdocs.org/sdr/2014FA0000047), Jan 27, 2014: ATTACH BRACKET. CORRODED. DURING SCHEDULED ANNUAL INSPECTION, FOUND MOVEMENT IN THE RT WING SPAR FITTINGS, BETWEEN THE RT WING MAIN SPAR ATTACH BRACKETS AND THE FUSELAGE CARRY-THROUGH SP
- [SDR 2014FA0000046](https://openairdocs.org/sdr/2014FA0000046), May 13, 2013: LIFTER. SPALLED. TWO SPALLED EXHUAST LIFTERS WHICH DAMAGE CAM.
- [SDR CKE2013F00000](https://openairdocs.org/sdr/CKE2013F00000), Mar 12, 2013: BUSHING. LOOSE. FUEL INJECTOR BUSHINGS DID NOT STAY IN PLACE WHEN FUEL INJECTORS WERE REMOVED. INJECTORS WERE REMOVED FOR CLEANING. THIS ENGINE HAS 185 TSMOH AND 5 OUT OF THE 6
- [SDR 2013FA0000009](https://openairdocs.org/sdr/2013FA0000009), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS INT INCLUDED.
- [SDR 2013FA0000010](https://openairdocs.org/sdr/2013FA0000010), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS INT INCLUDED.
- [SDR 2013FA0000011](https://openairdocs.org/sdr/2013FA0000011), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS INT INCLUDED.
- [SDR 2013FA0000012](https://openairdocs.org/sdr/2013FA0000012), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS NOT INCLUDED.
- [SDR 2013FA0000013](https://openairdocs.org/sdr/2013FA0000013), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS INT INCLUDED.
- [SDR 2013FA0000014](https://openairdocs.org/sdr/2013FA0000014), Dec 15, 2012: CYLINDER HEAD. CRACKED. COMPRESSION CHECK AT ANNUAL REVEALED CRACKED HEAD-AD 2004-08-10 NA DUE TO SN AND "A" STAMP. THIS CYLINDER SEEMS TO HAVE SAME PROBLEM AS AD BUT WAS INT INCLUDED.
- [SDR 2012FA0000716](https://openairdocs.org/sdr/2012FA0000716), Oct 22, 2012: PUMP. LEAKING. PILOT WROTE-UP "FUEL FLOW METER INOP" DURING INITIAL START-UP. FOUND NO OR VERY LOW FUEL FLOW INDICATION AT IDLE BUT ENGINE RAN NORMAL, FOUND NORMAL FUEL FLOW I
- [SDR 2010FA0001213](https://openairdocs.org/sdr/2010FA0001213), Dec 2, 2010: ROD BOLT. LOOSE. PILOT EXPERIENCED ENGINE SUDDEN STOPPAGE IN FLIGHT AND MADE UNSCHEDULED LANDING. ANALYSIS OF THE CATASTROPHIC ENGINE FAILURE INDICATED FAILURE OCCURED WHEN THE 
- [SDR 2010FA0001177](https://openairdocs.org/sdr/2010FA0001177), Nov 15, 2010: CASE. PUNCTURED. PILOT REPORTED LOSSING OIL PRESSURE FOLLOWED BY LOSS OF POWER. AFTER FORCED LANDING ON DIRT ROAD, INSP SHOWED CONNECTING ROD HAD PENETRATED UPPER LT SIDE OF MAI
- [SDR 2010FA0001164](https://openairdocs.org/sdr/2010FA0001164), Nov 3, 2010: CAMSHAFT. WORN. WORN CAMSHAFT (PN 655384, SN 34962) DISCOVERED DURING CYLINDER CHANGE (LOW COMPRESSION) CYLINDERS NR3 & NR4 INTAKE LOBES ONLY. NEW LIFTERS WERE INSTALLED WITH T
- [SDR 2010FA0001170](https://openairdocs.org/sdr/2010FA0001170), Oct 28, 2010: HUB. FAILED. RT MAIN WHEEL HUB BROKE ON LANDING, AFTER NORMAL TOUCHDOWN WITH NO BRAKING. BROKEN AREA OF WHEEL HAS CORROSION AT BOTTOM OF THREADS. WHEEL TURNED SIDEWAYS DAMAG
- [SDR 2010FA0001121](https://openairdocs.org/sdr/2010FA0001121), Oct 18, 2010: TAPPET. CHIPPED. NEW TAPPET BODY WAS CHIPPED AT THE EDGE OF THE TAPPET BODY FACE.
- [SDR 2010FA0001215](https://openairdocs.org/sdr/2010FA0001215), Oct 4, 2010: FITTING. BROKEN. (GBBR) THE ENGINE SUFFERED CATASTROPHIC FAILURE DUE TO ENGINE OIL STARVATION CAUSED BY THE FAILURE/BREAKAGE OF THE TURBOCHARGER OIL RETURN LINE FITTING AT THE R
- [SDR GBBR155E](https://openairdocs.org/sdr/GBBR155E), Sep 24, 2010: FITTING. BROKEN. (GGBR) THE ENGINE SUFFERED CATASTROPHIC FAILURE DUE TO ENGINE OIL STARVATION CAUSED BY THE FAILURE/BREAKAGE OF THE TURBOCHARGER RETURN OIL LINE FITTING AT THE R
- [SDR J7B2010F00000](https://openairdocs.org/sdr/J7B2010F00000), Aug 13, 2010: CYLINDER. LEAKING. CYLINDER ASSY IS LEAKING. FUEL, EXHAUST, AND OIL STAIN BETWEEN CYLINDER BARREL AND HEAD. OCCURRED UNDER NORMAL USAGE.
- [SDR J7B2010F00001](https://openairdocs.org/sdr/J7B2010F00001), Aug 13, 2010: CYLINDER. LEAKING. CYLINDER ASSY IS LEAKING. FUEL, EXHAUST, AND OIL STAIN BETWEEN CYLINDER BARREL AND HEAD. OCCURRED UNDER NORMAL USAGE.
- [SDR 2010FA0000756](https://openairdocs.org/sdr/2010FA0000756), Jul 17, 2010: CHECK VALVE. FAILED. P/N S2361-1, LOT 60507, OIL CHECK VALVE FROM TURBOCHARGER, INSTALLED NEW ON 12 APRIL 2010, 60 HOURS IN SERVICE PRIOR TO FAILURE. RECEIVED "LOW OIL PRESSURE" ALE
- [SDR 2009FA0000969](https://openairdocs.org/sdr/2009FA0000969), Sep 22, 2009: CYLINDER HEAD. CRACKED. CYLINDER HEAD CRACKED AT THE EXHAUST PORT. THE CRACK EXTENDS FROM THE INSIDE ABOVE THE VALVE SEAT THROUGH THE CYLINDER HEAD APPROX 1.7" LONG. (K)
- [SDR 2009FA0000970](https://openairdocs.org/sdr/2009FA0000970), Sep 22, 2009: CYLINDER HEAD. CRACKED. CYLINDER HEAD CRACKED AT THE INTAKE PORT. THE CRACK EXTENDS FROM THE EDGE OF THE INTAKE PORT TO BETWEEN THE COOLING FINS APPROX 2.5". (K)
- [SDR 2009FA0000791](https://openairdocs.org/sdr/2009FA0000791), Jun 17, 2009: LINE. CORRODED. INSP FOUND MINOR FUEL LEAK AT THE FWD FUEL LINE WHERE IT COMES IN CONTACT WITH FRESH AIR VENT DUCTING LOACTED IN WING L/E. AIR DUCTING CAUSES CORROSION PITS TO 
- [SDR 2007FA0000641](https://openairdocs.org/sdr/2007FA0000641), Jul 6, 2007: LINE. MISMANUFACTURED. NEW FUEL INJECTOR LINE NR 5 CYL RAM PMA REPLACEMENT. INSTALLED ON ENGINES, WELD DEFECT ALLOWED DEVIPER END BAIL TO COME LOOSE FROM LINE. NOTED FUEL LEAN ON TOP 
- [SDR 2007FA0000398](https://openairdocs.org/sdr/2007FA0000398), Apr 18, 2007: MAGNETO. CORRODED. EMERGENCY RETURN TO FIELD: INSPECTION REQUIREMENTS FOR MAGNETO (PN 6320) ARC NOT ADEQUATE TO INSURE PROPER VENTING (PRESSURIZED MAG). SB 2-80C SPECIFIES ONLY EX
- [SDR 2007FA0000399](https://openairdocs.org/sdr/2007FA0000399), Apr 18, 2007: MAGNETO. CORRODED. EMERGENCY RETURN TO FIELD: INSPECTION REQUIREMENTS FOR MAGNETO (PN 6320) ARC NOT ADEQUATE TO INSURE PROPER VENTING (PRESSURIZED MAG). SB2-80C SPECIFIES ONLY EXT
- [SDR 2006FA0001070](https://openairdocs.org/sdr/2006FA0001070), Feb 23, 2006: BEARING. SEIZED. OVERHAULER W/O NR 84062, O/H DATE 10/06/2006. STARTER BEARING SEIZED AFTER INSTALLATION STARTER MOTOR FAILED. (K)
- [SDR CA060201001](https://openairdocs.org/sdr/CA060201001), Feb 1, 2006: SPAR. CRACKED. A 100 HR INSPECTION WAS STARTED A CRACK WAS DISCOVERED AT THE RIGHT FRONT SPAROUT BOARD END WHERE IT ATTACHES TO THE SUB SPAR. THE CRACK IS VERTICAL RUNNING APP
- [SDR 2005FA0001133](https://openairdocs.org/sdr/2005FA0001133), Jul 19, 2005: CYLINDER HEAD. DAMAGED. DURING CRUISE FLIGHT, A LOUD BANG FROM THE ENGINE COMPARTMENT WAS FOLLOWED BY LOSS OF POWER AND SIGNIFICANT ENGINE VIBRATION. THE PILOT MADE AN EMERGENCY LANDIN
- [SDR 2005FA0000999](https://openairdocs.org/sdr/2005FA0000999), Jun 1, 2005: CYLINDER HEAD. SEPARATED. NR 2 CYLINDER HEAD SEPARATED FROM BARREL. OCURRENCE OCCURRED DURING DEPARTURE FROM AIRPORT, ENROUTE. PROBABLE CAUSE IS WORN CYLINDER OR POSSIBLE OVERBOOST. RECO
- [SDR 2005FA0000586](https://openairdocs.org/sdr/2005FA0000586), Apr 10, 2005: GOVERNOR. PLUGGED. DEPARTING SOFT FIELD POWER AND RPM FINE ON INITIAL ROLL. AFTER WHEELS BECAME LIGHT, POWER BLED OFF, YIELDING NO FURTHER ACCELERATION OR LIFT. ABORTED TAKE-OFF, 
- [SDR 2005FA0000216](https://openairdocs.org/sdr/2005FA0000216), Feb 9, 2005: CONNECTING ROD. FAILED. NR 2 CONNECTING ROD FAILED BREAKING CRANKCASE, KNOCKING LT MAG FROM MOUNT. ROD SHOWED FRICTION WELDING TO CRANK PRIOR TO FAIURE. COUNTERWEIGHT DAMAGED BY IMPACT
- [SDR 2005FA0000024](https://openairdocs.org/sdr/2005FA0000024), Jan 17, 2005: BOLT. LOOSE. 3 OF THE 4 BOLTS THAT ATTACH THE METAL PLATE THAT THE ACTUATOR IS MOUNTED ON TO THE WASTEGATE BODY WERE MISSING. FOURTH BOLT WAS BACKED OUT ABOUT HALF WAY. ALL 
- [SDR 2005FA0000444](https://openairdocs.org/sdr/2005FA0000444), Dec 23, 2004: EXHAUST VALVE. BROKEN. PILOT REPORTED HEARING A BANG AND NOTICED AN ENGINE VIBRATION AND REDUCTION IN TEMPERATURE ON HIS ENGINE MONITOR. PILOT REPORTED AN EMERGENCY TO ATC AND MADE A 
- [SDR 2004FA0000807](https://openairdocs.org/sdr/2004FA0000807), Oct 17, 2004: EXHAUST VALVE. BURNED. EXHAUST VALVE LEAKAGE ON COMPRESSION CHECK. BURNED VALVE VERIFIED BORESCOPE INSPECTION. VALVE STEM AND GUIDE WORN BEYOND SERVICE LIMITS.
- [SDR CA050125015](https://openairdocs.org/sdr/CA050125015), Jul 16, 2004: PISTON. DISINTEGRATED. (CAN) ENGINE HAD 450 HOURS SINCE TOTAL O/H, WAS PERFORMING NORMAL. CYL LEAK TEST WERE MIN. 60/80 AND OIL CONSUMPTION WAS 1 LT-13 HRS. AC WAS IN BASE LEG WITH PO
- [SDR CRJ2004F00000](https://openairdocs.org/sdr/CRJ2004F00000), Jun 15, 2004: GROUND WIRE. DIRTY. WHEN PITOT HEAT IS ENGAGED, IT RENDERS THE STALL WARNING HORN INOPERABLE. STALL WARNING RESUMES WORKING PROPERLY WITH PITOT HEAT DISENGAGED. THE GROUND ON THE S

All 129: https://openairdocs.org/engine/continental-tsio-520-r/reports.md

## STCs that may be installed (OpenAirDocs) (58, 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 TSIO-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 SE5009NM](https://openairdocs.org/stc/SE5009NM): Installation of a modified exhaust system. Aerospace Welding Minneapolis 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 SE2599NM](https://openairdocs.org/stc/SE2599NM): Installation of an air intercooler in the engine induction system downstream of the turbocharger. Western Skyways Aircraft Modifications Inc
- [STC SE3932NM](https://openairdocs.org/stc/SE3932NM): Installation of an intercooler in the engine air induction system. Western Skyways Aircraft Modifications Inc
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [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 SE96WE](https://openairdocs.org/stc/SE96WE): Installation of oil fitting(AN-823-5D) in rocker box cover. Airwolf Filter Corporation
- [STC SE0417CH](https://openairdocs.org/stc/SE0417CH): Turbo-normalization. Western Skyways Aircraft Modifications Inc
- [STC SE00113SE](https://openairdocs.org/stc/SE00113SE): Replaces Teledyne-Continental Part Number 646277 lifter bodies. B & B Aviation LLC
- [STC SE5784NM](https://openairdocs.org/stc/SE5784NM): Replacement of Teledyne Continental original camshaft. B & B Aviation LLC
- [STC SE03415CH](https://openairdocs.org/stc/SE03415CH): The turbo-normalization of Continental Motors engine models IO-520-A, -F, -J, and -L, TSIO-520-C, -G, -H, -M, and -R, and IO-550-F and L for installation into Cessna 206, 207 & 210 aircraft. DERS Group Svc 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 SE2393NM](https://openairdocs.org/stc/SE2393NM): Installation of a magneto pressurization kit assembly and associated system for Bendix Models S6RN-1201 and 1205, and SLICK Models 662, 680, 6210 and 6220. Turboplus Aircraft Systems, Inc
- [STC SE1186SW](https://openairdocs.org/stc/SE1186SW): Regrooving of pistons P/N 631475 or P/N 632585. Continental Motors, Inc
- [STC SE5820SW](https://openairdocs.org/stc/SE5820SW): Installation of Airmotive exhaust valve, P/N AEC-637781. Continental Motors, Inc. Lists TSIO-520 Series
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists TSIO-520 Series
- [STC SE04117CH](https://openairdocs.org/stc/SE04117CH): Conversion of Continental Motors engine models TSIO-520-C, -G, -H, -M & -R to the naturally aspirated IO-520-A, -F, -J & -L. Western Skyways
- [STC SE3330NM](https://openairdocs.org/stc/SE3330NM): Continental valve cover gasket. Real Gaskets Tennessee
- [STC SE09280SC-D](https://openairdocs.org/stc/SE09280SC-D): Modify engine in accordance with RAM Aircraft Corporation Drawing No. 1888. RAM Aircraft Limited Partnership
- [STC SE3631SW-D](https://openairdocs.org/stc/SE3631SW-D): Cylinder modifications. RAM Aircraft Limited Partnership
- [STC SE5726SW-D](https://openairdocs.org/stc/SE5726SW-D): Installation of Floscan - 20lb or - 203b fuel flow transducers. RAM Aircraft Limited Partnership
- [STC SE09846SC](https://openairdocs.org/stc/SE09846SC): Installation of S539800M30 starter adapter springs. Aircraft Specialties Services Inc
- [STC SE444GL](https://openairdocs.org/stc/SE444GL): Incorporation of a fuel flow transducer. Shadin Avionics
- [STC SE630SW](https://openairdocs.org/stc/SE630SW): Engine modifications. RAM Aircraft Limited Partnership
- [STC SE4651SW](https://openairdocs.org/stc/SE4651SW): Installation of Slick pressurized magnetos. Also eligible on Teledyne Continental TSIO-520-NB engines modified per STC SE4327SW. RAM Aircraft Limited Partnership
- [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc
- [STC SE5726SW](https://openairdocs.org/stc/SE5726SW): Installation of Floscan -201b or -203b fuel flow transducers. RAM Aircraft Limited Partnership
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE09261SC](https://openairdocs.org/stc/SE09261SC): Modify engine to increase power output rating from 310 hp to 335 hp, install Garrett/AlliedSignal TA-81 turbocharger, RAM intercooler, RAM economy camshaft, RAM oil pump pickup tube, RAM forged pistons with gapless rings, and 0.02 inch undersized crankshaft. RAM Aircraft Limited Partnership. Lists TSIO-520 Series
- [STC SE3631SW](https://openairdocs.org/stc/SE3631SW): Cylinder modification. RAM Aircraft Limited Partnership. Lists TSIO-520 Series
- [STC SE5455SW](https://openairdocs.org/stc/SE5455SW): Unpressurized Slick 6220 magnetos. RAM Aircraft Limited Partnership
- [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 TSIO-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 TSIO-520 Series
- [STC SE2680NM](https://openairdocs.org/stc/SE2680NM): Installation of a wastegate actuator drain line. Machen Inc
- [STC SE09289SC](https://openairdocs.org/stc/SE09289SC): Installation of modified fuel injector nozzles. General Aviation Modifications, Inc. Lists TSIO-520 Series
- [STC SE00577NY](https://openairdocs.org/stc/SE00577NY): Installation of Canadian Aero Mfg. (C.A.M.) Oil Coolers. Canadian Aero Manufacturing
- [STC SE09319SC](https://openairdocs.org/stc/SE09319SC): Modify oil pan adding a new oil sump drain. Texas Skyways Inc. Lists TSIO-520 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE00427NY](https://openairdocs.org/stc/SE00427NY): Installation, operation and inspection of CAM oil coolers. Canadian Aero Manufacturing
- [STC SE00144SE](https://openairdocs.org/stc/SE00144SE): Replaces the following Teledyne-Continental part numbers: 641682 (Rocker Arm, Exhaust), 539742 (Rocker Arm, Intake), 539740 (Rocker Arm, Shaft) and 538304 (Pushrod Assembly). Dakota Aircraft Parts Inc
- [STC SE8687SW](https://openairdocs.org/stc/SE8687SW): Regrooving of pistons P/N 631475 or P/N 632585. Capehart Industries, Inc. Lists TSIO-520 Series
- [STC SE8594SW](https://openairdocs.org/stc/SE8594SW): Installation of roller rocker arm P/N PE 92I intake and PE92E exhaust. Performance Engineering
- [STC SE5205NM](https://openairdocs.org/stc/SE5205NM): Installation of an Oilamatic engine filter screen adapter. Oilamatic Inc
- [STC SE7430SW](https://openairdocs.org/stc/SE7430SW): Installation of Performance Engineering roller rocker arms. Performance Engineering
- [STC SE941GL](https://openairdocs.org/stc/SE941GL): Installation of oil filler tube extension. Rapco, Inc

All 58: https://openairdocs.org/engine/continental-tsio-520-r/stcs.md

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