# Continental TSIO-520-VB

- Type: Engine model (FAA registry)
- Registry code: 17272
- Manufacturer (registry): CONT MOTOR
- Model: TSIO-520-VB
- Engine type: Reciprocating
- Power: 325 hp
- Data sheet: [TCDS E8CE](https://openairdocs.org/tcds/E8CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 11 registered aircraft
- Page: https://openairdocs.org/engine/continental-tsio-520-vb

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 2012-10-13](https://openairdocs.org/ad/2012-10-13): Starter adapters · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Jun 8, 2012
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2010-11-04](https://openairdocs.org/ad/2010-11-04): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 190 more. Effective Jun 16, 2010
- [AD 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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [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 93-16-15](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 89-24-01 R1](https://openairdocs.org/ad/89-24-01-R1): Scavenge Oil Pump Gears · Continental Motors TSIO-520-B, TSIO-520-BB, TSIO-520-D and 11 more. Effective Aug 10, 1990
- [AD 88-03-06](https://openairdocs.org/ad/88-03-06): Oil Filter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 155 more. Effective Apr 15, 1988
- [AD 86-13-04 R3](https://openairdocs.org/ad/86-13-04-R3): Cylinder Assemblies · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 44 more. Effective Feb 24, 1988
- [AD 81-24-06](https://openairdocs.org/ad/81-24-06): Engine Driven Fuel Pumps · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 51 more. Effective Nov 23, 1981
- [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981
- [AD 80-01-04](https://openairdocs.org/ad/80-01-04): Cylinder Holddown Flange Assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 44 more. Effective Jan 25, 1980
- [AD 79-05-09](https://openairdocs.org/ad/79-05-09): Oil Pump Assembly Or Oil Pressure Relief Valve Screw And/Or Plunger · Teledyne Continental Motors 6-285-CA, GTSIO-520-C, GTSIO-520-D and 60 more. Effective Mar 12, 1979
- [AD 98-01-08](https://openairdocs.org/ad/98-01-08): Exhaust Roller Rocker Arm · Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW)

Historical (superseded or no longer in force):

- [AD 2023-04-08](https://openairdocs.org/ad/2023-04-08) (historical): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 141 more. Effective Feb 23, 2023
- [AD 2011-25-51](https://openairdocs.org/ad/2011-25-51) (historical): Starter Adapter Gear Shaft · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Dec 28, 2011
- [AD 2009-24-52](https://openairdocs.org/ad/2009-24-52) (historical): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 192 more
- [AD 2009-24-51](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) (11)

- [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020
- [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT  Alternator Drive Coupling. Issued Jun 20, 2018
- [SAIB NE-17-11](https://openairdocs.org/saib/NE-17-11): POWERPLANT  Engine damage as a result of kickback. Issued May 10, 2017
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013
- [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012
- [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009
- [SAIB NE-10-07](https://openairdocs.org/saib/NE-10-07): Reciprocating Engine Cylinder: Identification Information for Superior Air Parts, PMA Cylinder Heads for Teledyne Continental Motors (TCM) IO-520, TSIO-520,and IO-550 Series Engines.. Issued Nov 2, 2009
- [SAIB NE-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009
- [SAIB NE-07-09R1](https://openairdocs.org/saib/NE-07-09R1): Periodic Inspections of ECi Cylinder Assemblies for Cracks in the Aluminum Head. Issued Mar 21, 2007
- [SAIB NE-02-41](https://openairdocs.org/saib/NE-02-41): . Issued Aug 8, 2002

## Registered aircraft (11)

- [N270RC](https://openairdocs.org/aircraft/N270RC): [Eagle 1-N270rc LLC](https://openairdocs.org/faa-owner/EAGLE%201-N270RC%20LLC), [San Juan, PR](https://openairdocs.org/faa-place/PR/San%20Juan), built 1980, S/N 402C0269
- [N274MR](https://openairdocs.org/aircraft/N274MR): [Aero Systems Inc](https://openairdocs.org/faa-owner/AERO%20SYSTEMS%20INC), [Broomfield, CO](https://openairdocs.org/faa-place/CO/Broomfield), built 1980, S/N 402C0274
- [N275RC](https://openairdocs.org/aircraft/N275RC): [Gianopoulous William](https://openairdocs.org/faa-owner/GIANOPOULOUS%20WILLIAM), [Lawrence, MA](https://openairdocs.org/faa-place/MA/Lawrence), built 1979, S/N 402C0117
- [N346CH](https://openairdocs.org/aircraft/N346CH): [Ace Flight Center Inc](https://openairdocs.org/faa-owner/ACE%20FLIGHT%20CENTER%20INC), [St Thomas, VI](https://openairdocs.org/faa-place/VI/St%20Thomas), built 1979, S/N 402C0029
- [N400AT](https://openairdocs.org/aircraft/N400AT): [Alpha Tango Aviation Inc](https://openairdocs.org/faa-owner/ALPHA%20TANGO%20AVIATION%20INC), [Middletown, DE](https://openairdocs.org/faa-place/DE/Middletown), built 1981, S/N 402C0510
- [N402SB](https://openairdocs.org/aircraft/N402SB): [Glemone Airways Inc](https://openairdocs.org/faa-owner/GLEMONE%20AIRWAYS%20INC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1979, S/N 402C0082
- [N426LJ](https://openairdocs.org/aircraft/N426LJ): [Venture Air Solutions Inc](https://openairdocs.org/faa-owner/VENTURE%20AIR%20SOLUTIONS%20INC), [Opa Locka, FL](https://openairdocs.org/faa-place/FL/Opa%20Locka), built 1981, S/N 402C0434
- [N42AA](https://openairdocs.org/aircraft/N42AA): [N42aa LLC](https://openairdocs.org/faa-owner/N42AA%20LLC), [Nantucket, MA](https://openairdocs.org/faa-place/MA/Nantucket), built 1979, S/N 402C0238
- [N68379](https://openairdocs.org/aircraft/N68379): [Express Carrier LLC](https://openairdocs.org/faa-owner/EXPRESS%20CARRIER%20LLC), [St Thomas, VI](https://openairdocs.org/faa-place/VI/St%20Thomas), built 1981, S/N 402C0469
- [N751CA](https://openairdocs.org/aircraft/N751CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1979, S/N 402C0217
- [N997TA](https://openairdocs.org/aircraft/N997TA): [Air Flight Inc](https://openairdocs.org/faa-owner/AIR%20FLIGHT%20INC), [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale), built 1980, S/N 402C-0231

## NTSB investigations

None matched to aircraft with this engine model.

## FAA accident and incident reports

None matched to aircraft with this engine model.

## Service difficulty reports (654, newest 50)

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

- [SDR HYIA20250515001](https://openairdocs.org/sdr/HYIA20250515001), May 12, 2025: WIRE. SHORTED. PILOT REPORTED LEFT ENGINE CYLINDER TEMP INDICATIONS WERE IN THE RED ON TAXI OUT. MAINTENANCE INSPECTED AND FOUND THE POSITIVE WIRE TO THE ALTERNATOR SHORTED IN
- [SDR 2024FA0000751](https://openairdocs.org/sdr/2024FA0000751), Oct 3, 2024: IMPULSE COUPLING. FAILED. IMPULSE COUPLING FAILURE CAUSED RT MAGNETO TO BE INOPERATIVE AND METAL CONTAMINATION OF ENGINE.
- [SDR HYIA20240321002](https://openairdocs.org/sdr/HYIA20240321002), Mar 20, 2024: ALTERNATOR. FAILED. PILOT REPORTED RIGHT ALTERNATOR INOPERATIVE. MAINTENANCE INSPECTED AND FOUND THE ALTERNATOR HUB NUT MISSING, FLY WHEEL BOLTS MISSING AND DAMAGE TO THE FLY WHEEL
- [SDR HYIA20240221001](https://openairdocs.org/sdr/HYIA20240221001), Feb 17, 2024: ENGINE. FAILED. ON APPROACH PILOT NOTICED A SUDDEN "BANG" ACCOMPANIED BY SLIGHT POWER & RPM LOSS ON THE LEFT ENGINE. SMOKE AND OIL BEGAN COMING FROM LEFT ENGINE. OIL PRESSURE D
- [SDR HYIA20240321001](https://openairdocs.org/sdr/HYIA20240321001), Nov 30, 2023: ALTERNATOR. FAILED. PILOT REPORTED RIGHT ALTERNATOR OUT LIGHT ILLUMINATED. MAINTENANCE INSPECTED AND FOUND ALTERNATOR HUB NUT MISSING AND METAL CONTAMINATION IN THE ENGINE. THE ENG
- [SDR HYIA20231031001](https://openairdocs.org/sdr/HYIA20231031001), Oct 29, 2023: THROTTLE BODY. BACKED OUT. PILOT REPORTED LEFT THROTTLE STUCK AT APPROXIMATELY 34 INCHES MP WHEN REDUCING FROM TAKE OFF POWER TO CLIMB POWER. MAINTENANCE INSPECTED AND FOUND THE LEFT THRO
- [SDR 2023F00088](https://openairdocs.org/sdr/2023F00088), Mar 9, 2023: LINE. BLEW OUT. LINE ASSY GEAR RETRACTION HOSE P/N 58 0108-1 HAD ITS FLAIR SPLIT UPON INITIAL GEAR RETRACTION DEPOSITING ALL HYDRAULIC FLUID OVERBOARD. NOSE GEAR RETRACTED BUT 
- [SDR 2023F00092](https://openairdocs.org/sdr/2023F00092), Mar 9, 2023: LINE. BLEW OUT. LINE ASSY GEAR RETRACTION HOSE PN 58 0108-1 HAD ITS FLAIR SPLIT UPON INITIAL GEAR RETRACTION ALLOWING THE DEPLETION OF ALL HYDRAULIC FLUID. AIRCRAFT EMERGENCY P
- [SDR HYIA20210823001](https://openairdocs.org/sdr/HYIA20210823001), Aug 19, 2021: ENGINE. MAKING METAL. THE PILOT REPORTED THE LEFT ENGINE HAD A LOSS OF POWER IN AND THE OIL PRESSURE FELL TO ZERO. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES IN THE OIL FILTER. 
- [SDR HYIA20210611001](https://openairdocs.org/sdr/HYIA20210611001), Jun 6, 2021: SPRING. BROKEN. DURING APPROACH THE NOSE LANDING GEAR WOULD NOT EXTEND. AIRCRAFT LANDED WITH NOSE GEAR RETRACTED. NO INJURIES. INSPECTION FOUND THE NOSE GEAR DOOR RETURN SPRING
- [SDR HYIA20210611002](https://openairdocs.org/sdr/HYIA20210611002), May 28, 2021: LINE. CRACKED. NOSE GEAR LIGHT DID NOT ILLUMINATE ON EXTENSION, AIRCRAFT LANDED WITH GEAR UNLOCKED, GEAR COLLAPSED ON LANDING. NO INJURIES. INSPECTED AIRCRAFT AND FOUND HYDRAU
- [SDR HYIA20210525002](https://openairdocs.org/sdr/HYIA20210525002), May 20, 2021: CYLINDER. DAMAGED. THE PILOT REPORTED ENGINE SURGING AND MANIFOLD PRESSURE DROP IN FLIGHT, AND THEN SHUT DOWN ENGINE IN-FLIGHT ACCORDING TO THE QRH. DURING THE INITIAL INSPECTION,
- [SDR HYIA202009109001](https://openairdocs.org/sdr/HYIA202009109001), Sep 6, 2020: ENGINE. DAMAGED. PILOT REPORTED A SIGNIFICANT DROP IN OIL PRESSURE DURING FLIGHT, AND AFTER LANDING, OIL LEAKING FROM RIGHT ENGINE. MAINTENANCE INSPECTED AND FOUND METAL PARTICL
- [SDR HYIA2020090131001](https://openairdocs.org/sdr/HYIA2020090131001), Aug 28, 2020: CYLINDER. DAMAGED. PILOT REPORTED MAGNETO ROUGH IN FLIGHT. MAINTENANCE INSPECTED AND FOUND OIL IN THE #5 CYLINDER. UPON REMOVAL OF THE CYLINDER IT WAS FOUND TO HAVE MISSING MATERI
- [SDR HYIA20200521001](https://openairdocs.org/sdr/HYIA20200521001), May 20, 2020: ADAPTER. BROKEN. DURING INITIAL CLIMB APPROXIMATELY 3 MINUTES AFTER TAKEOFF THE CREW REPORTED A LT YAW MOVEMENT AND RECOGNIZED LT ENGINE MAP INDICATION DROPPING FOLLOWED BY A RA
- [SDR HYIA202005221004](https://openairdocs.org/sdr/HYIA202005221004), May 7, 2020: CYLINDER. FAILED. PILOT REPORTED A STRONG VIBRATION IN FLIGHT. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #1 CYLINDER TO HAVE LOW COMPRESSION AND THE #3 AND #4 CYLINDERS TO 
- [SDR HYIA202005222004](https://openairdocs.org/sdr/HYIA202005222004), May 7, 2020: CYLINDER. DAMAGED. PILOT REPORTED A STRONG VIBRATION IN FLIGHT. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #1 CYLINDER TO HAVE LOW COMPRESSION AND THE #3 AND #4 CYLINDERS TO 
- [SDR HYIA202005223004](https://openairdocs.org/sdr/HYIA202005223004), May 7, 2020: CYLINDER. DAMAGED. PILOT REPORTED A STRONG VIBRATION IN FLIGHT. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #1 CYLINDER TO HAVE LOW COMPRESSION AND THE #3 AND #4 CYLINDERS TO 
- [SDR HYIA20200508001](https://openairdocs.org/sdr/HYIA20200508001), May 6, 2020: CONNECTING ROD. DAMAGED. DURING ROUTINE INSPECTION AND REPLACEMENT OF THE RIGHT ENGINE CYLINDER #3 IT WAS DISCOVERED THAT THE CONNECTING ROD BUSHING OF THE #3 CYLINDER WAS FOUND TO BE D
- [SDR HYIA20200521002](https://openairdocs.org/sdr/HYIA20200521002), May 6, 2020: CYLINDER. LOW PRESSURE. PILOT REPORTED ROUGH RUNNING ENGINE. MAINTENANCE INSPECTED AND FOUND RIGHT #5 CYLINDER NO COMPRESSION. REMOVED AND REPLACED ENGINE WITH NO FURTHER DEFECT NOTED,
- [SDR HYIA20200422001](https://openairdocs.org/sdr/HYIA20200422001), Apr 21, 2020: BUSHING. MIGRATED. DURING ROUTINE INSPECTION AND REPLACEMENT OF THE RIGHT ENGINE CYLINDER #6 IT WAS DISCOVERED THAT THE CONNECTING ROD BUSHING OF THE #6 CYLINDER WAS FOUND TO BE L
- [SDR HYIA202002270001](https://openairdocs.org/sdr/HYIA202002270001), Feb 23, 2020: CYLINDER. LOW PRESSURE. PILOT REPORTED RIGHT ENGINE MAP FLUCTUATED IN FLIGHT. MAINTENANCE INSPECTED AND FOUND TURBOCHARGER IMPELLER HARD TO MOVE AS WELL AS LOW COMPRESSION ON THE NUMBE
- [SDR HYIA20200227001](https://openairdocs.org/sdr/HYIA20200227001), Feb 23, 2020: CYLINDER. LOW PRESSURE. PILOT REPORTED RIGHT ENGINE MAP FLUCTUATED IN FLIGHT. MAINTENANCE INSPECTED AND FOUND TURBOCHARGER IMPELLER HARD TO MOVE AS WELL AS LOW COMPRESSION ON THE NUMBE
- [SDR HYIA2020022700002](https://openairdocs.org/sdr/HYIA2020022700002), Feb 22, 2020: CYLINDER. LOW PRESSURE. PILOT REPORTED ROUGH RUNNING RIGHT ENGINE ON CLIMB OUT. MAINTENANCE INSPECTED AND FOUND THE NUMBER 6 CYLINDER EXHAUST VALVE TO BE BROKEN AND THE NUMBER 4 CYLIND
- [SDR HYIA20200227002](https://openairdocs.org/sdr/HYIA20200227002), Feb 22, 2020: CYLINDER. BROKEN. PILOT REPORTED ROUGH RUNNING RIGHT ENGINE ON CLIMB OUT. MAINTENANCE INSPECTED AND FOUND THE NUMBER 6 CYLINDER EXHAUST VALVE TO BE BROKEN AND THE NUMBER 4 CYLIND
- [SDR HYIA20200115001](https://openairdocs.org/sdr/HYIA20200115001), Jan 9, 2020: UNKNOWN. MALFUNCTIONED. BOTH PROPELLERS CONTACTED RUNWAY DURING TOUCH & GO TRAINING MANEUVER. SUSPECT NOSE LANDING GEAR ACTUATOR TO BE AT FAULT. NO DAMAGE TO AIRCRAFT, BOTH ENGINES AND
- [SDR HYIA20191112002](https://openairdocs.org/sdr/HYIA20191112002), Nov 12, 2019: CRANKCASE. FAILED. PILOT REPORTED STEADILY DECREASING OIL PRESSURE AT LT ENGINE. CREW INTENTIONALLY CAGED LT ENGINE WHEN ‘MECHANICAL’ NOISES WERE HEARD AND SAFELY LANDED. INITIAL 
- [SDR HYIA20190920002](https://openairdocs.org/sdr/HYIA20190920002), Sep 19, 2019: CYLINDER. DAMAGED. PILOT REPORTED RIGHT ENGINE MANIFOLD PRESSURE DROPPED TO 20". AFTER FULL POWER WAS APPLIED THE RIGHT ENGINE STARTED TO SURGE. MAINTENANCE INSPECTED AND FOUND DA
- [SDR HYIA20190524001](https://openairdocs.org/sdr/HYIA20190524001), May 17, 2019: BEARING. CRACKED. PILOT REPORTED LEFT PROPELLER VIBRATES ABOVE 2500 RPM. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #1 CYLINDER EXHAUST VALVE ERODED AND RECESSED INTO CYLIND
- [SDR HYIA20190515002](https://openairdocs.org/sdr/HYIA20190515002), May 12, 2019: CYLINDER. FAILED. PILOT REPORTED A ROUGH ENGINE; "MISSING" WHEN PROPS BROUGHT BACK FOR CRUISE AND STRONG VIBRATIONS ON FINAL APPROACH. MAINTENANCE INSPECTED AND FOUND THE LEFT EN
- [SDR HYIA20190515003](https://openairdocs.org/sdr/HYIA20190515003), May 8, 2019: GOVERNOR. FAILED. PILOT REPORTED RIGHT PROP WENT ALL THE WAY TO THE DETENTE AT CLIMB POWER BUT NEVER CAME BELOW 2700 RPM. MAINTENANCE INSPECTED AND FOUND THE RIGHT PROP GOVERNOR 
- [SDR HYIA20190426001](https://openairdocs.org/sdr/HYIA20190426001), Apr 23, 2019: EXHAUST VALVE. DAMAGED. DURING INSPECTION THE #4 CYLINDER OF THE LEFT ENGINE WAS FOUND TO HAVE LOW COMPRESSION. UPON FURTHER INSPECTION THE EXHAUST VALVE HAD FOUR SMALL CHIPS IN THE ED
- [SDR HYIA20190410002](https://openairdocs.org/sdr/HYIA20190410002), Mar 22, 2019: ENGINE. MAKING METAL. PILOT REPORTED RIGHT MANIFOLD PRESSURE DROPPED TO 25 INCHES AND RIGHT OIL PRESSURE TO JUST ABOVE RED LINE. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES IN TH
- [SDR HYIA20190410001](https://openairdocs.org/sdr/HYIA20190410001), Mar 11, 2019: CYLINDER. FAILED. PILOT REPORTED RIGHT ENGINE SURGING AFTER TAKEOFF. MAINTENANCE INSPECTED AND FOUND THE #3 CYLINDER TO BE AT FAULT. THE #3 CYLINDER WAS REPLACED WITH NO FURTHER 
- [SDR HYIA20190315006](https://openairdocs.org/sdr/HYIA20190315006), Mar 7, 2019: CYLINDER. DAMAGED. PILOT REPORTED RIGHT ENGINE SURGES, SHUTTERS AND VIBRATES ON ALL POWER SETTINGS. MAINTENANCE INSPECTED AND FOUND CYLINDER NR 4 WEAR IN EXHAUST VALVE KEEPER AREA
- [SDR HYIA20190315002](https://openairdocs.org/sdr/HYIA20190315002), Mar 4, 2019: CYLINDER. LEAKING. PILOT REPORTED SHAKING FELT IN AIRFRAME DURING CLIMB/CRUISE WITH NO ABNORMAL ENGINE INDICATIONS ON INSTRUMENTATION. MAINTENANCE INSPECTED AND FOUND THE RIGHT EN
- [SDR HYIA20190315004](https://openairdocs.org/sdr/HYIA20190315004), Feb 26, 2019: EXHAUST VALVE. BROKEN. PILOT REPORTED RIGHT ENGINE RUNNING ROUGH IN FLIGHT WITH ONE INCH MAP FLUCTUATION INTERMITTENT. MAINTENANCE INSPECTED AND FOUND THE EXHAUST VALVE DISCOLORED AND
- [SDR HYIA20190315007](https://openairdocs.org/sdr/HYIA20190315007), Feb 26, 2019: LIFTER. COLLAPSED. PILOT REPORTED ENGINE RUNS ROUGH IN CLIMB. MAINTENANCE INSPECTED AND FOUND LOW COMPRESSION ON THE NR 2 & NR 3 CYLINDERS OF THE RIGHT ENGINE, COLLAPSED LIFTERS O
- [SDR HYIA20190208001](https://openairdocs.org/sdr/HYIA20190208001), Feb 3, 2019: CYLINDER. LEAKING. PILOT REPORTED A SHAKING FELT IN AIRFRAME DURING CLIMB AND CRUISE. MAINTENANCE INSPECTED AND FOUND THE #6 CYLINDER OF THE LEFT ENGINE TO HAVE LOW COMPRESSION. T
- [SDR HYIA20190115002](https://openairdocs.org/sdr/HYIA20190115002), Jan 12, 2019: ENGINE. FAILED. PILOT REPORTED ENGINE SHUDDERED IN FLIGHT AND THEN STOPPED SHORTLY AFTER. THE AIRCRAFT LANDED WITHOUT INCIDENT. INITIAL INSPECTION REVEALED AN ENGINE CASE PENET
- [SDR HYIA20190107001](https://openairdocs.org/sdr/HYIA20190107001), Jan 5, 2019: INTAKE VALVE. DAMAGED. PILOT REPORTED RIGHT ENGINE SHUDDERED, THEN STARTED RUNNING ROUGH IN FLIGHT. PRELIMINARY INSPECTION FOUND DAMAGE TO THE NR 1 INTAKE VALVE, DAMAGE TO THE NR 1 AN
- [SDR HYIA20180102001](https://openairdocs.org/sdr/HYIA20180102001), Dec 30, 2018: MOUNT BOLT. MISSING. PILOT REPORTED OIL LEAK IN FLIGHT AND OIL PRESSURE DECREASING ON THE RIGHT ENGINE. UPON INSPECTION MAINTENANCE DISCOVERED ONE STARTER MOUNT BOLT NUT MISSING. ST
- [SDR HYIA20181218002](https://openairdocs.org/sdr/HYIA20181218002), Dec 14, 2018: CABLE ASSY. FAILED. PILOT REPORTED RIGHT ENGINE THROTTLE STUCK AT 35 INCHES MAP. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT RETURNED TO THE FIELD WITHOUT INCIDENT. INSPECTION FOUND 
- [SDR HYIA20181130001](https://openairdocs.org/sdr/HYIA20181130001), Nov 28, 2018: CRANKSHAFT. FRACTURED. PILOT REPORTED DURING CLIMB/CRUISE FLIGHT THE RIGHT HYDRAULIC FLOW LIGHT CAME ON AND RIGHT ENGINE LOST POWER. UPON INITIAL INSPECTION, THE ENGINE WAS FOUND TO B
- [SDR HYIA20181023003](https://openairdocs.org/sdr/HYIA20181023003), Oct 22, 2018: CYLINDER. DAMAGED. PILOT REPORTED THE LEFT ENGINE BEGAN TO VIBRATE, THEN OIL PRESSURE BEGAN TO DROP AND CONTINUED DROPPING INTO THE RED. INITIAL INSPECTION FOUND MULTIPLE POINTS O
- [SDR HYIA20181024002](https://openairdocs.org/sdr/HYIA20181024002), Oct 22, 2018: BEARING. DAMAGED. PILOT REPORTED RIGHT ENGINE LOW OIL PRESSURE ON GROUND RUN-UP. INITIAL INSPECTION FOUND THE STARTER ADAPTER NEEDLE BEARING DAMAGED. THE ENGINE IS BEING REPLACED
- [SDR HYIA20181009001](https://openairdocs.org/sdr/HYIA20181009001), Oct 8, 2018: ENGINE. FAILED. PILOT REPORTED LEFT ENGINE STARTED VIBRATING IN FLIGHT, WHEN MANIFOLD PRESSURE WENT TO AMBIENT. THE ENGINE WAS SHUT DOWN IN FLIGHT AND WOULD NOT RESTART. UPON I
- [SDR HYIA20180928001](https://openairdocs.org/sdr/HYIA20180928001), Sep 25, 2018: PUSHROD. BROKEN. PILOT REPORTED THE LEFT ENGINE RUNNING ROUGH IN FLIGHT AND OIL PRESSURE WENT TO ZERO PSI. PRELIMINARY INSPECTION FOUND METAL CONTAMINATION IN OIL FILTER, #4 CYL
- [SDR HYIA20180926001](https://openairdocs.org/sdr/HYIA20180926001), Sep 24, 2018: ENGINE. MAKING METAL. PILOT REPORTED RIGHT ENGINE OIL PRESSURE DROPPED TO 20 PSI IN FLIGHT AND TO ZERO PSI AT IDLE ON THE GROUND. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES AT T
- [SDR HYIA20180831001](https://openairdocs.org/sdr/HYIA20180831001), Aug 24, 2018: OIL SYSTEM. LOW PRESSURE. PILOT REPORTED IN CRUISE, BOTH ENGINES LOST OIL PRESSURE AND STARTED TO RUN ROUGH. NO LEAKS WERE NOTED, BUT LOW OIL LEVELS WERE NOTED ON BOTH SIDES OIL DIPSTICK

All 654: https://openairdocs.org/engine/continental-tsio-520-vb/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 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 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 SE00113SE](https://openairdocs.org/stc/SE00113SE): Replaces Teledyne-Continental Part Number 646277 lifter bodies. B & B Aviation LLC
- [STC SE5785NM](https://openairdocs.org/stc/SE5785NM): Replacement of Teledyne Continental original camshaft with P/N 32122-2. B & B Aviation LLC
- [STC SE70RM](https://openairdocs.org/stc/SE70RM): Installation of compressor bracket. Air Comm Corporation
- [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc
- [STC SE1186SW](https://openairdocs.org/stc/SE1186SW): Regrooving of pistons P/N 631475 or P/N 632585. Continental Motors, Inc
- [STC 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 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 SE09281SC-D](https://openairdocs.org/stc/SE09281SC-D): Modify engine in accordance with RAM Aircraft Corporation Drawing Number 1891. RAM Aircraft Limited Partnership
- [STC SE3632SW-D](https://openairdocs.org/stc/SE3632SW-D): Installation of induction hose clamps. RAM Aircraft Limited Partnership
- [STC SE09282SC-D](https://openairdocs.org/stc/SE09282SC-D): Modify engine in accordance with RAM Aircraft Corporation Drawing Number 1892. RAM Aircraft Limited Partnership
- [STC SE09653SC-D](https://openairdocs.org/stc/SE09653SC-D): Installation of RAM Induction Equalized Fuel Nozzle Set. 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 SE01628NY](https://openairdocs.org/stc/SE01628NY): Modification of starter adapter by substitution or rework of accessory drive parts. Canadian Aero Manufacturing
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC 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 SE3632SW](https://openairdocs.org/stc/SE3632SW): Installation of induction hose clamps. RAM Aircraft Limited Partnership
- [STC SE3683SW](https://openairdocs.org/stc/SE3683SW): Installation of alternator clutch hub Teledyne part no. 640934 with Teledyne part no. 642056 alternator. This mod has been found to be compatible with STC SE4327SW and SE3714SW. RAM Aircraft Limited Partnership
- [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 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 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 SE7430SW](https://openairdocs.org/stc/SE7430SW): Installation of Performance Engineering roller rocker arms. Performance Engineering
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists TSIO-520 Series
- [STC SE3630SW](https://openairdocs.org/stc/SE3630SW): Crankcase modifications. RAM Aircraft Limited Partnership
- [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 TSIO-520 Series

All 58: https://openairdocs.org/engine/continental-tsio-520-vb/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.