# Continental TSIO-520-C

- Type: Engine model (FAA registry)
- Registry code: 17251
- Manufacturer (registry): CONT MOTOR
- Model: TSIO-520-C
- Engine type: Reciprocating
- Power: 285 hp
- Data sheet: [TCDS E8CE](https://openairdocs.org/tcds/E8CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 17 registered aircraft
- Page: https://openairdocs.org/engine/continental-tsio-520-c

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 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 93-08-17](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 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 70-13-03](https://openairdocs.org/ad/70-13-03): Hydraulic Lock · Continental Motors TSIO-520-C. Effective Jul 2, 1970
- [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 (17)

- [N186ML](https://openairdocs.org/aircraft/N186ML): [Idaho Fly Girl LLC](https://openairdocs.org/faa-owner/IDAHO%20FLY%20GIRL%20LLC), [Boise, ID](https://openairdocs.org/faa-place/ID/Boise), built 1974, S/N U20602644
- [N206BA](https://openairdocs.org/aircraft/N206BA): [Boeing Company](https://openairdocs.org/faa-owner/BOEING%20COMPANY), [Mesaon, AZ](https://openairdocs.org/faa-place/AZ/Mesaon), built 1973, S/N U20602034
- [N2443T](https://openairdocs.org/aircraft/N2443T): [N2443t LLC](https://openairdocs.org/faa-owner/N2443T%20LLC), [High Springs, FL](https://openairdocs.org/faa-place/FL/High%20Springs), built 1962, S/N NAV-4-2443
- [N2704W](https://openairdocs.org/aircraft/N2704W): [Spillman David T](https://openairdocs.org/faa-owner/SPILLMAN%20DAVID%20T), [Flagstaff, AZ](https://openairdocs.org/faa-place/AZ/Flagstaff), built 1967, S/N U2060690
- [N3746](https://openairdocs.org/aircraft/N3746): [Nickravesh Niknam J](https://openairdocs.org/faa-owner/NICKRAVESH%20NIKNAM%20J), [Saratoga, CA](https://openairdocs.org/faa-place/CA/Saratoga), built 1975, S/N U20602818
- [N448AK](https://openairdocs.org/aircraft/N448AK): [N448ak LLC](https://openairdocs.org/faa-owner/N448AK%20LLC), [Helena, MT](https://openairdocs.org/faa-place/MT/Helena), built 1974, S/N U20602295
- [N4831F](https://openairdocs.org/aircraft/N4831F): [Willis Rodney S](https://openairdocs.org/faa-owner/WILLIS%20RODNEY%20S), [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla), built 1966, S/N U206-0531
- [N6214V](https://openairdocs.org/aircraft/N6214V): built 1968, S/N U206-1189
- [N65N](https://openairdocs.org/aircraft/N65N): [Olterman Robin L](https://openairdocs.org/faa-owner/OLTERMAN%20ROBIN%20L), [John Day, OR](https://openairdocs.org/faa-place/OR/John%20Day), built 1971, S/N U20601729
- [N6712R](https://openairdocs.org/aircraft/N6712R): [Aero Applications Inc](https://openairdocs.org/faa-owner/AERO%20APPLICATIONS%20INC), [Burley, ID](https://openairdocs.org/faa-place/ID/Burley), built 1966, S/N T210-0112
- [N673AT](https://openairdocs.org/aircraft/N673AT): [Citizen Air LLC](https://openairdocs.org/faa-owner/CITIZEN%20AIR%20LLC), [Port Angeles, WA](https://openairdocs.org/faa-place/WA/Port%20Angeles), built 1976, S/N U20603513
- [N6946R](https://openairdocs.org/aircraft/N6946R): [Grosslight Gordon](https://openairdocs.org/faa-owner/GROSSLIGHT%20GORDON), [Westcliffe, CO](https://openairdocs.org/faa-place/CO/Westcliffe), built 1968, S/N T210-0346
- [N71924](https://openairdocs.org/aircraft/N71924): [Keystone Aerial Surveys Inc](https://openairdocs.org/faa-owner/KEYSTONE%20AERIAL%20SURVEYS%20INC), [Philadelphia, PA](https://openairdocs.org/faa-place/PA/Philadelphia), built 1968, S/N U206-1226
- [N769BS](https://openairdocs.org/aircraft/N769BS): [Wells Donald T](https://openairdocs.org/faa-owner/WELLS%20DONALD%20T), [Seattle, WA](https://openairdocs.org/faa-place/WA/Seattle), built 1968, S/N U206-1251
- [N8225Q](https://openairdocs.org/aircraft/N8225Q): [Cartoflight Inc](https://openairdocs.org/faa-owner/CARTOFLIGHT%20INC), [Willoughby, OH](https://openairdocs.org/faa-place/OH/Willoughby), built 1976, S/N U20603109
- [N8491S](https://openairdocs.org/aircraft/N8491S): [Ogrin Kirk V](https://openairdocs.org/faa-owner/OGRIN%20KIRK%20V), [Bigfork, MT](https://openairdocs.org/faa-place/MT/Bigfork), built 1965, S/N 18256591
- [N858JA](https://openairdocs.org/aircraft/N858JA): [Ams Aviation LLC](https://openairdocs.org/faa-owner/AMS%20AVIATION%20LLC), [South Bend, IN](https://openairdocs.org/faa-place/IN/South%20Bend), built 1976, S/N U20603437

## NTSB investigations (6)

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 CEN22FA168](https://openairdocs.org/ntsb/CEN22FA168), Apr 5, 2022: Cessna TU206F (N858JA), Marlin, TX, substantial damage, 2 fatal. Probable cause: The pilot’s failure to maintain control of the airplane during landing for reasons that could not be determined based on available information.
- [NTSB CEN10CA378](https://openairdocs.org/ntsb/CEN10CA378), Jul 7, 2010: Cessna 206 (N164SA), Albuquerque, NM, substantial damage. Probable cause: The pilot's improper recovery from a bounced landing.
- [NTSB DEN84FA016](https://openairdocs.org/ntsb/DEN84FA016), Oct 23, 1983: Cessna TU-206A (N4831F), Loveland, CO, substantial damage
- [NTSB DEN79FA044](https://openairdocs.org/ntsb/DEN79FA044), Jun 17, 1979: Cessna U206 (N4424Q), Milford, UT, destroyed
- [NTSB DEN76AD066](https://openairdocs.org/ntsb/DEN76AD066), Aug 15, 1976: Cessna TU206 (N4831F), Ouray, UT, substantial damage
- [NTSB NYC67D0397](https://openairdocs.org/ntsb/NYC67D0397), Nov 29, 1966: Navion G (N2443T), West Chester, PA, substantial damage

## FAA accident and incident reports (10)

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 20220405004969A](https://openairdocs.org/incident/20220405004969A), Apr 5, 2022: Cessna TU206F (N858JA), Marlin, TX, Substantial damage, 2 fatal. On April 5, 2022, about 1231 central daylight time, a Cessna TU206 airplane, N858JA, was substantially damaged when it was involved in an accident near Marlin,…
- [Incident 20160419004119I](https://openairdocs.org/incident/20160419004119I), Apr 19, 2016: Navion NAVION G (N2443T), Melbourne, FL, Minor damage. On April 20, 2016, N2443T, a Navion aircraft, landed gear up on runway 9L at Melbourne international airport. The pilot was uninjured. During a discussion with…
- [Accident 20100707050129A](https://openairdocs.org/incident/20100707050129A), Jul 7, 2010: Cessna TU206B (N164SA), Albuquerque, NM, Substantial damage. Pilot took off from and remained in pattern at kaeg for touch and go's. on third landing, pilot lost control in a porpoise and aircraft sustained substantial…
- [Incident 19920716033459I](https://openairdocs.org/incident/19920716033459I), Jul 16, 1992: Cessna T210F (N6712R), Pozo, CA. Vibration and power loss on descent. Landed in pasture. Propeller failure caused by actuating pin defect.
- [Incident 19870213031579I](https://openairdocs.org/incident/19870213031579I), Feb 13, 1987: Cessna TU206F (N8225Q), Willoughby, OH, Minor damage. Moved propeller through by hand. Engine started, unoccupied aircraft taxied into a ditch.
- [Accident 19831023055469A](https://openairdocs.org/incident/19831023055469A), Oct 23, 1983: Cessna TU206A (N4831F), Ft Collins, CO, Substantial damage. Lost part of a prop blade. Jumpers left. Aircraft deadsticked to airport. Extensive vibration damage. Popped rivets.
- [Accident 19820723031699A](https://openairdocs.org/incident/19820723031699A), Jul 23, 1982: Cessna 206CESSNA (N206BA), Warren, OH, Substantial damage. Entered downdraft below tree line landing at Private strip. Unable to flare,damaged wing tip, floats and empennage.
- [Incident 19800921069879I](https://openairdocs.org/incident/19800921069879I), Sep 21, 1980: Cessna T210H (N6946R), Santa Susana, CA, Minor damage. Failed to extend gear before landing.
- [Accident 19790617041309A](https://openairdocs.org/incident/19790617041309A), Jun 17, 1979: Cessna 206CESSNA (N4424Q), Milford, UT, Destroyed. Ground lead came off alternator. Arcing caused fuel hose to rupture & fuel fire. Landed safely. Airplane burned.
- [Accident 19760815038929A](https://openairdocs.org/incident/19760815038929A), Aug 15, 1976: Cessna TU206A (N4831F), Ouray, UT, Substantial damage. Lndd in gusty conditions on rough rocky strip.

## Service difficulty reports (52, newest 50)

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

- [SDR 2015FA0000651](https://openairdocs.org/sdr/2015FA0000651), Dec 15, 2015: BUSHING. FAILED. AT ENGINE O/H A USED SERVICEABLE OIL PUMP DRIVEN GEAR WITH BUSHING WAS INSTALLED. THE ENGINE WAS TEST RUN, OIL WAS DRAINED AND FILTER WAS CUT OPEN. NO DISCREPAN
- [SDR CA140321003](https://openairdocs.org/sdr/CA140321003), Feb 9, 2014: RESTRAINT. MISSING. (CAN) LT AND RT CABIN DOOR RESTRAINTS BROKEN AND MISSING ALLOWING DOORS, REPEATEDLY CONTACT WING STRUTS. DAMAGE TO DOOR SKINS AND WING STRUTS OCCURRED.
- [SDR CA140321004](https://openairdocs.org/sdr/CA140321004), Feb 9, 2014: HORN. DEFORMED. (CAN) LT AND RT ELEVATOR HORN L/E DEFORMED AND COVERED IN A UNAPPROVED RUBBER L/E BOOT. VERY POOR HORIZONTAL STABILIZER TO ELEVATOR HORN CLEARANCE. WHEN UNAPPRO
- [SDR CA140321005](https://openairdocs.org/sdr/CA140321005), Feb 9, 2014: FUSE. MISINSTALLED. (CAN) EXTERNAL GROUND POWER CIRCUIT PROTECTION UNAPPROVED. FOUND PREVIOUSLY TRIPPED GLASS FUSE WRAPPED IN ALUMINUM FOIL FROM A CIGARETTE PACKAGE AND INSTALLED I
- [SDR CA140321006](https://openairdocs.org/sdr/CA140321006), Feb 9, 2014: WIRE. MISINSTALLED. (CAN) ELT REMOTE POWER WIRING NOT CIRCUIT PROTECTED. FOUND POWER WIRE HARD WIRED TO CLOCK. CLOCK POWER CIRCUIT PROTECTION UNAPPROVED. FOUND CLOCK POWER FUSE WRA
- [SDR CA140321007](https://openairdocs.org/sdr/CA140321007), Feb 9, 2014: CYLINDER. CORRODED. (CAN) HOT CYLINDER DIFFERENTIAL COMPRESSION CHECK CARRIED OUT AND FOUND ALL CYLINDER COMPRESSIONS WELL BELOW MINIMUM ALLOWABLE. VIDEOSCOPE INSPECTION CARRIED OU
- [SDR CA140321008](https://openairdocs.org/sdr/CA140321008), Feb 9, 2014: SENSOR. MALFUNCTIONED. (CAN) ENGINE TEMPERATURE MONITOR PROBES ON THE ODD CYLINDER BANK REVERSED CAUSING THE INCORRECT CYLINDER DATA TO BE DISPLAYED TO PILOT. ALSO, FOUND MAIN POWER A
- [SDR CA140321009](https://openairdocs.org/sdr/CA140321009), Feb 9, 2014: EXTINGUISHER. MISINSTALLED. CABIN FIRE EXTINGUISHER FOUND TO BE POORLY SECURED TO CABIN FLOOR. PK STYLE SHEET METAL SCREWS FASTENING MOUNT TO LIGHT ALUMINUM FLOOR. WEEK INSTALLATION UNABLE
- [SDR CA140321010](https://openairdocs.org/sdr/CA140321010), Feb 9, 2014: MOUNT. WEAK. (CAN) ENGINE LOWER COWLING INDUCTION AIR DUCT CHAFED THOUGH BY ENGINE EXHAUST MUFFLER HEAT SHROUD. FOUND ENGINE RUBBER ISOLATION MOUNTS WEAK AND DAMAGED AND POO
- [SDR CA140322002](https://openairdocs.org/sdr/CA140322002), Feb 9, 2014: FEEDER CABLE. DAMAGED. (CAN) ENGINE STARTER POWER CABLE, WIRE NR D-PA8, WILL NOT ALLOW SUFFICIENT CURRENT FLOW TO CRANK ENGINE PROPERLY DUE TO CABLE STRANDS BROKEN IN TERMINAL END AT 
- [SDR CA140321002](https://openairdocs.org/sdr/CA140321002), Feb 9, 2014: AIR BOX. DEFECTIVE. (CAN) CARBURETOR AIR BOX SEALING FACE PREVIOUSLY REPAIRED. FIT BETWEEN AIR BOX SEALING FACE & ENG LOWER COWLING INDUCTION AIR DUCT EXPANSION BOOT VERY POOR, ALL
- [SDR BGJA2013121600031](https://openairdocs.org/sdr/BGJA2013121600031), Dec 16, 2013: CYLINDER. CRACKED. DURING INSPECTION, FOUND CYLINDER CRACKED.
- [SDR BGJA2013121600749](https://openairdocs.org/sdr/BGJA2013121600749), Dec 16, 2013: CYLINDER. CRACKED. DURING INSPECTION FOUND CYLINDER CRACKED.
- [SDR 2013FA0000679](https://openairdocs.org/sdr/2013FA0000679), Nov 23, 2013: CYLINDER. CRACKED. CRACKED ENGINE CYLINDER.
- [SDR GNMA20120704](https://openairdocs.org/sdr/GNMA20120704), Jul 4, 2012: ENGINE. POWER LOSS. PILOT REPORTED LOW RT ENGINE MANIFOLD PRESSURE AND LOW RPM ON GROUND RUN UP WHEN LEAVING TO RETURN TO HOME BASE. ENGINE RESPONSE AT DIFFERENT SETTINGS MADE NO C
- [SDR 2011FA0000768](https://openairdocs.org/sdr/2011FA0000768), Nov 16, 2011: ENGINE. FAILED. ACFT ENGINE HAD 35 HRS SINCE O/H. O/H FACILITY "BROKE IN" ENGINE. POST CATASTROPHIC FAILURE INSPECTION REVEALED EXTREMELY HIGH TEMPERATURES, IE: CRANKSHAFT JOUR
- [SDR CA111019018](https://openairdocs.org/sdr/CA111019018), Oct 19, 2011: BRUSHES. MISSING. (CAN) MAG WAS REMOVED FROM ENGINE DUE TO PROP STRIKE INSPECTION. A 500 HR INSP WAS PERFORMED ON THE MAG DUE TO THE PROP STRIKE. WHEN THE MAG WAS DISASSEMBLED TH
- [SDR CA120215002](https://openairdocs.org/sdr/CA120215002), Sep 24, 2011: EXHAUST VALVE. STUCK. (CAN) STICKY EXHAUST VALVE
- [SDR CA110105013](https://openairdocs.org/sdr/CA110105013), Oct 15, 2010: BLADES. BENT. BENT COMPRESSOR BLADES, POSSIBLE FOD.
- [SDR CA081002003](https://openairdocs.org/sdr/CA081002003), Sep 29, 2008: TURBINE WHEEL. SEIZED. (CAN) TURBINE WHEEL SEIZED. TURBOCHARGER REMOVED, OVERHAULED TURBOCHARGER INSTALLED.
- [SDR CA071227004](https://openairdocs.org/sdr/CA071227004), Sep 9, 2007: BULKHEAD. CRACKED. (CAN) CRACK IN REAR BULKHEAD PIN DURING MANDATORY NDT INSPECTION OF THE ARGA. (TC NR 20071227004)
- [SDR 2007FA0000723](https://openairdocs.org/sdr/2007FA0000723), Aug 23, 2007: CHECK VALVE. WORN. AFTER FLIGHT A/C SITTING ON RAMP DEVELOPED LARGE OIL LEAK FROM TURBOCHARGER. FOUND OIL CHECK VALVE FLAPPER VALVE SEVERELY WORN.
- [SDR IKJ2007F00000](https://openairdocs.org/sdr/IKJ2007F00000), Jan 18, 2007: CYLINDER. CRACKED. CYLINDER DEVELOPED CRACK FROM INTAKE SEAT AROUND THE OUTER PORTION OF CYLINDER TO SPARK PLUG HOLE. CRACK FOLLOWED THE PATH OF 1 OR 2 FINS AND WENT JUST AFT (CAS
- [SDR CA061117002](https://openairdocs.org/sdr/CA061117002), Sep 21, 2006: CONTROLLER. FAILED. (CAN) ERRATIC MANIFOLD PRESSURE DUE TO CONTROLLER FAILURE TO REGULATE OIL PRESSURE FROM WASTEGATE (TC NR 20061117002)
- [SDR 2006FA0000470](https://openairdocs.org/sdr/2006FA0000470), Apr 4, 2006: BEARING. FAILED. WHILE REMOVING THE STARTER FOR MAINTENANCE, THE STARTER ADAPTER WORM SHAFT ROLLER BEARING RETAINER CAGE HALF WAS FOUND STUCK TO THE STARTER FLANGE. ALL THE ROLL
- [SDR 2005FA0001070](https://openairdocs.org/sdr/2005FA0001070), Jun 23, 2005: DOOR. FAILED. INVESTIGATION OF LOW MANIFOLD PRESSURE BY TECH RVEALED THE STEEL TAB RIVETED TO ALTERNATE AIR DOOR FOR MAGNETIC CLOSURE HAD FALLEN OFF AND ENTERED TURBOCHARGER.
- [SDR TZR2005F00019](https://openairdocs.org/sdr/TZR2005F00019), Apr 15, 2005: CYLINDER. CRACKED. CYLINDER CRACKED FROM EXHAUST VALVE TO TOP SPARK PLUG PORT. ECI CYLINDER. (SW05200507952) (K)
- [SDR 2004FA0000749](https://openairdocs.org/sdr/2004FA0000749), Jul 28, 2004: DUCT. LOOSE. SCAT 16 NOSE FROM AIRBOX TO TURBOCHARGER AIR INLET, WIRE INSIDE SCAT 16 NOSE WAS 1 INCH FROM TURBOCHARGER COMPRESSOR WHEEL. WIRE MUST BE SECURED TO OUTSIDE OF A
- [SDR AOC04002](https://openairdocs.org/sdr/AOC04002), Jul 21, 2004: CYLINDER. DAMAGED. FOLLOWING SEVERAL WRITE UPS CONCERNING HIGH CYLINDER TEMP, THE CYLINDERS WERE REMOVED AFTER PREVIOUS LIKE PROBLEMS WITH ANOTHER AIRCRAFT. UPON INSPECTION OF THE
- [SDR RKW2003F00000](https://openairdocs.org/sdr/RKW2003F00000), Jun 6, 2003: CONDENSER. SHORTED. FLYING OVER MOUNTAINS, ENGINE BEGAN TO RUN ROUGH. DIVERTED, RIGHT MAGNETO CONDENSER FOUND TOTALLY SHORTED. ON RUN UP AFTER MAINTENANCE, LEFT MAGNETO RAN ROUGH, 
- [SDR 2003FA0000002](https://openairdocs.org/sdr/2003FA0000002), Nov 26, 2002: THRU BOLT. UNDERTORQUED. THE ALTERNATOR THROUGH BOLTS SECURING THE FRONT CASE HALF TO THE REAR CASE HALF WERE FOUND TO HAVE BACKED OUT ALLOWING THE CASE HALVES TO SEPARATE APPROXIMATELY
- [SDR CA020322004](https://openairdocs.org/sdr/CA020322004), Mar 12, 2002: FITTING. SHEARED. (CAN) RIVETS THAT ATTACH FITTING TO FORWARD SPAR WERE SHEARED. MOST RIVETS, 10 IN ALL, SHOWED SIGNS OF RINGS AROUND SHANKS AT FITTING/SKIN SEAM. ONE RIVETS WAS 
- [SDR EKI2001F00000](https://openairdocs.org/sdr/EKI2001F00000), Dec 14, 2001: ADAPTER. FAILED. STATOR ADAPTOR FAILED AND DAMAGED REAR OF CASE WHERE SHAFT RIDES. ADAPTOR WAS REMOVED 20 HOURS EARLIER AND INSPECTED PER CSB. NO DEFECTS NOTED. THESE UNITS CONT
- [SDR BLI2001F00001](https://openairdocs.org/sdr/BLI2001F00001), Aug 15, 2001: WIRE. CHAFED. ON APPROACH, RIGHT ENGINE FIRE WARNING ON. AIRCRAFT INSPECTED FOR EVIDENCE OF DAMAGE OR EXHAUST LEAK. NONE NOTED. EXTENSIVE GROUND RUNS COULD NOT DUPLICATE. AIR
- [SDR 20010312CW010](https://openairdocs.org/sdr/20010312CW010), Jan 25, 2001: BRACKET. CRACKED. AC WAS IN THE HANGAR FOR 50 HOUR INSPECTION. STROBE LIGHTS WERE TURNED ON AND AN EXPLOSION DAMAGED THE LEFT WING TIP TANK. FWD FAIRING WAS BLOWN APART BY AN EXP
- [SDR 20010227CW001](https://openairdocs.org/sdr/20010227CW001), Jan 23, 2001: TORQUE TUBE. CRACKED. TORQUE TUBE CRACKED AT FORK BOLT TUBE BOSS. THIS IS 2ND 5/8 BOSS WE HAVE HAD FAIL AND RECOMMEND INSPECTION IMMEDIATELY ON UNITS OVER 5000 HOURS. THE 1/2 BOSS TO
- [SDR 20001030SH005](https://openairdocs.org/sdr/20001030SH005), Oct 9, 2000: PUMP. LEAKING. AFTER ENGINE SHUT DOWN, FUEL FOUND LEAKING FROM LEFT COWL FLAP TRACED TO FUEL PUMP. SUBMITTER STATED THIS WAS 3RD FUEL PUMP FOR THIS ENGINE, DOWN 7/8 DAYS EACH 
- [SDR 20000913SH007](https://openairdocs.org/sdr/20000913SH007), Aug 29, 2000: PUMP. LEAKING. REPLACEMENT (FOR REBUILT) BRAND NEW FUEL PUMP FOUND LEAKING FUEL FROM PORT SIDE ENGINE COWL BEFORE FLIGHT. POSSIBLE CAUSE, BROKEN DIAPHRAGM. (X)
- [SDR 20000811SH020](https://openairdocs.org/sdr/20000811SH020), Jul 14, 2000: HOUSING. DEFECTIVE. RELEVANT INDICATION ON SIDE OF GOVERNOR BASE. (X)
- [SDR CA991103001](https://openairdocs.org/sdr/CA991103001), Oct 13, 1999: LIFTER. FAILED. (CAN) HYDRAULIC LIFTERS FAILING TO KEEP CONTACT WITH CAMS. NEW P/N INSTALLED.
- [SDR 99ZZZX3750](https://openairdocs.org/sdr/99ZZZX3750), Aug 19, 1999: VALVE. FAILED. DURING DESCENT FROM ALTITUDE AFTER A 2 HOUR CROSS COUNTRY FLIGHT AND 10 MILES FROM HOME BASE, THE ENGINE BEGAN TO RUN ROUGH. DESCENT WAS STOPPED AT 2.500 FEET T
- [SDR 99ZZZX1011](https://openairdocs.org/sdr/99ZZZX1011), Dec 10, 1998: LIFTER. FAILED. THE EXHAUST LIFTER, PN 628488, IS CALLED FOR INSTALLATION IN TSIO520C IN TCM MANUAL NR X30579A. SIX NEW LIFTERS WERE INSTALLED AT OVERHAUL OF ENGINE. ONE YEAR A
- [SDR CA980916059](https://openairdocs.org/sdr/CA980916059), Sep 9, 1998: LINE. CHAFED. (CAN) RIGHT AILERON CABLE RUNNING VERTICALLY UP THE RIGHT WINDOW POST RUBBING AND WEARING INTO THE FUEL LINE WHICH IS RUNNING UP THE SAME POST.
- [SDR 97ZZZX2850](https://openairdocs.org/sdr/97ZZZX2850), May 28, 1997: TURBOCHARGER. CRACKED. TURBOCHARGER EXHAUST HOUSING CRACKED AROUND AUXILIARY MOUNTING LUG.
- [SDR 97ZZZX863](https://openairdocs.org/sdr/97ZZZX863), Jan 7, 1997: FUEL LINE. FAILED. FUEL LINE FAILED, LEAKS. METAL BRAIDED FUEL LINE TO THE FUEL FLOW GAUGE. LINE REPLACED WITH SERVICABLE FUEL LINE.
- [SDR CA970106010](https://openairdocs.org/sdr/CA970106010), Dec 23, 1996: DOUBLER. CRACKED. (CAN) CRACKS DISCOVERED AROUND BOLT HOLES ON THE OUTBOARD SIDE OF THE DOUBLER. LEFT HAND SIDE OF THE MAIN LANDING GEAR.
- [SDR 96ZZZX4316](https://openairdocs.org/sdr/96ZZZX4316), Jul 31, 1996: HOSE. LEAKING. HOSE ASSY FAILED AFTER 2 YEARS AND LESS THAN 200 HOURS OF OPERATION. HOSE TSO: C531, MFG DATE A1094, LOT NR 06827.
- [SDR 96ZZZX4317](https://openairdocs.org/sdr/96ZZZX4317), Jul 31, 1996: HOSE ASSY. LEAKING. HOSE ASSY FAILED AFTER 2 YEARS AND LESS THAN 200 HOURS OF OPERATION. HOSE IS TSO C53A, MFG DATE A1094, LOT NR 06827.
- [SDR AU960974](https://openairdocs.org/sdr/AU960974), Jul 3, 1996: BATTERY. LEAKING. (AUS) ELT BATTERY PACK LEAKING - CORROSIVE MATERIAL FROM THE BATTERY HAD LEAKED ONTO THE AIRFRAME STRUCTURE CAUSING CORROSION - EXPIRRATION DATE OF BATTERY IS 2
- [SDR 96ZZZX95](https://openairdocs.org/sdr/96ZZZX95), Dec 18, 1995: TURBOCHARGER. BEARING FAILED. TURBOCHARGER REPLACED FOR LOW BOOST. MFG OVERHAULED TURBOCHARGER, INSTALLED AND GROUND RUN ACCOMPLISHED. GROUND PERFORMANCE SATISFACTORY. DURING FLIGHT, LOW BOO

All 52: https://openairdocs.org/engine/continental-tsio-520-c/reports.md

## STCs that may be installed (OpenAirDocs) (62, 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 SE3248NM](https://openairdocs.org/stc/SE3248NM): Installation of air to air intercooler in engine induction system. Western Skyways Aircraft Modifications 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 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 SE4988NM](https://openairdocs.org/stc/SE4988NM): Remove turbocharger and fuel injection system and install carburetor. North Point Aviation
- [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 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 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

All 62: https://openairdocs.org/engine/continental-tsio-520-c/stcs.md

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