# Continental TSIO-520-NB - Type: Engine model (FAA registry) - Registry code: 17265 - Manufacturer (registry): CONT MOTOR - Model: TSIO-520-NB - Engine type: Turbo-prop - Power: 310 hp - Data sheet: [TCDS E8CE](https://openairdocs.org/tcds/E8CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 52 registered aircraft - Page: https://openairdocs.org/engine/continental-tsio-520-nb 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 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 93-16-15](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 82-09-01](https://openairdocs.org/ad/82-09-01): Fuel Pressure Regulator Inlet and Outlet · Continental Motors TSIO-520-J, TSIO-520-K, TSIO-520-N and 1 more. Effective Jul 8, 1982 - [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) (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 (52, first 50) - [N1173W](https://openairdocs.org/aircraft/N1173W): [Scupham R K](https://openairdocs.org/faa-owner/SCUPHAM%20R%20K), [West Des Moines, IA](https://openairdocs.org/faa-place/IA/West%20Des%20Moines), built 1983, S/N 25-0731 - [N1234W](https://openairdocs.org/aircraft/N1234W): [Cuellar Mauricio Dominguez](https://openairdocs.org/faa-owner/CUELLAR%20MAURICIO%20DOMINGUEZ), [Tampa, FL](https://openairdocs.org/faa-place/FL/Tampa), built 1970, S/N 414-0043 - [N134GG](https://openairdocs.org/aircraft/N134GG): [Gibson Gordon S Trustee](https://openairdocs.org/faa-owner/GIBSON%20GORDON%20S%20TRUSTEE), [Pacific Palisades, CA](https://openairdocs.org/faa-place/CA/Pacific%20Palisades), built 1981, S/N 340A1202 - [N15VV](https://openairdocs.org/aircraft/N15VV): [Liberty Flying Club Inc Trustee](https://openairdocs.org/faa-owner/LIBERTY%20FLYING%20CLUB%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1990, S/N 340A1520 - [N167AW](https://openairdocs.org/aircraft/N167AW): [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 1978, S/N 340A0537 - [N169KS](https://openairdocs.org/aircraft/N169KS): [Svetfur Aviation LLC](https://openairdocs.org/faa-owner/SVETFUR%20AVIATION%20LLC), [Camden, SC](https://openairdocs.org/faa-place/SC/Camden), built 1978, S/N 414A0015 - [N233JH](https://openairdocs.org/aircraft/N233JH): [Aircraft Holding Solutions LLC Trustee](https://openairdocs.org/faa-owner/AIRCRAFT%20HOLDING%20SOLUTIONS%20LLC%20TRUSTEE), [Newark, DE](https://openairdocs.org/faa-place/DE/Newark), built 1977, S/N 414A0009 - [N254PB](https://openairdocs.org/aircraft/N254PB): [Nicole Business Group LLC](https://openairdocs.org/faa-owner/NICOLE%20BUSINESS%20GROUP%20LLC), [Hooks, TX](https://openairdocs.org/faa-place/TX/Hooks), built 1982, S/N 340A1504 - [N305PJ](https://openairdocs.org/aircraft/N305PJ): [Bradley Alana J](https://openairdocs.org/faa-owner/BRADLEY%20ALANA%20J), [Joliet, IL](https://openairdocs.org/faa-place/IL/Joliet), built 1986, S/N 25-1020 - [N30FB](https://openairdocs.org/aircraft/N30FB): [Bmg Aviation Leasing LLC](https://openairdocs.org/faa-owner/BMG%20AVIATION%20LEASING%20LLC), [Bloomington, IN](https://openairdocs.org/faa-place/IN/Bloomington), built 1978, S/N 414A0067 - [N320SW](https://openairdocs.org/aircraft/N320SW): [East West Investment Advisors LLC](https://openairdocs.org/faa-owner/EAST%20WEST%20INVESTMENT%20ADVISORS%20LLC), [Sandy Point, VA](https://openairdocs.org/faa-place/VA/Sandy%20Point), built 1980, S/N 414A0451 - [N340GT](https://openairdocs.org/aircraft/N340GT): [Wow-We Wings LLC](https://openairdocs.org/faa-owner/WOW-WE%20WINGS%20LLC), [Pawleys Island, SC](https://openairdocs.org/faa-place/SC/Pawleys%20Island), built 1981, S/N 340A1249 - [N340JC](https://openairdocs.org/aircraft/N340JC): [S O W Aviation LLC](https://openairdocs.org/faa-owner/S%20O%20W%20AVIATION%20LLC), [Crystal River, FL](https://openairdocs.org/faa-place/FL/Crystal%20River), built 1979, S/N 340A0801 - [N340JF](https://openairdocs.org/aircraft/N340JF): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1978, S/N 340A0451 - [N340JL](https://openairdocs.org/aircraft/N340JL): [Lechman Joseph](https://openairdocs.org/faa-owner/LECHMAN%20JOSEPH), [Agoura Hills, CA](https://openairdocs.org/faa-place/CA/Agoura%20Hills), built 1982, S/N 340A1543 - [N340JS](https://openairdocs.org/aircraft/N340JS): [Asher Kenneth Edward](https://openairdocs.org/faa-owner/ASHER%20KENNETH%20EDWARD), [Durango, CO](https://openairdocs.org/faa-place/CO/Durango), built 1979, S/N 340A0661 - [N340MY](https://openairdocs.org/aircraft/N340MY): [Aircraft Guaranty Corp Trustee](https://openairdocs.org/faa-owner/AIRCRAFT%20GUARANTY%20CORP%20TRUSTEE), [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City), built 1979, S/N 340A-0906 - [N340RA](https://openairdocs.org/aircraft/N340RA): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1976, S/N 340A0038 - [N340YZ](https://openairdocs.org/aircraft/N340YZ): [N340yz Corp Trustee](https://openairdocs.org/faa-owner/N340YZ%20CORP%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1976, S/N 340A0019 - [N346DW](https://openairdocs.org/aircraft/N346DW): [Valiair Lc Trustee](https://openairdocs.org/faa-owner/VALIAIR%20LC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1979, S/N 340A0742 - [N379TW](https://openairdocs.org/aircraft/N379TW): [Tanglewood Aviation LLC](https://openairdocs.org/faa-owner/TANGLEWOOD%20AVIATION%20LLC), [Fort Mill, SC](https://openairdocs.org/faa-place/SC/Fort%20Mill), built 1981, S/N 414A-0616 - [N414BL](https://openairdocs.org/aircraft/N414BL): [Big South Fork Aero Inc](https://openairdocs.org/faa-owner/BIG%20SOUTH%20FORK%20AERO%20INC), [Huntsville, TN](https://openairdocs.org/faa-place/TN/Huntsville), built 1978, S/N 414A0115 - [N414DW](https://openairdocs.org/aircraft/N414DW): [Agrigro Midwest Aviation LLC](https://openairdocs.org/faa-owner/AGRIGRO%20MIDWEST%20AVIATION%20LLC), [Poplar Bluff, MO](https://openairdocs.org/faa-place/MO/Poplar%20Bluff), built 1978, S/N 414A0043 - [N414EG](https://openairdocs.org/aircraft/N414EG): [Hardrock Transport LLC](https://openairdocs.org/faa-owner/HARDROCK%20TRANSPORT%20LLC), [Pulaski, VA](https://openairdocs.org/faa-place/VA/Pulaski), built 1982, S/N 414A0805 - [N414EH](https://openairdocs.org/aircraft/N414EH): [Surdex Corp](https://openairdocs.org/faa-owner/SURDEX%20CORP), [Chesterfield, MO](https://openairdocs.org/faa-place/MO/Chesterfield), built 1979, S/N 414A-0225 - [N414HL](https://openairdocs.org/aircraft/N414HL): [Warwick Corp](https://openairdocs.org/faa-owner/WARWICK%20CORP), [Laughlin, NV](https://openairdocs.org/faa-place/NV/Laughlin), built 1981, S/N 414A0809 - [N414JA](https://openairdocs.org/aircraft/N414JA): [Ghanbarzadeh Jamshid](https://openairdocs.org/faa-owner/GHANBARZADEH%20JAMSHID), [Costa Mesa, CA](https://openairdocs.org/faa-place/CA/Costa%20Mesa), built 1980, S/N 414A0410 - [N414JL](https://openairdocs.org/aircraft/N414JL): [Dodson International Parts Inc](https://openairdocs.org/faa-owner/DODSON%20INTERNATIONAL%20PARTS%20INC), [Rantoul, KS](https://openairdocs.org/faa-place/KS/Rantoul), built 1979, S/N 414A0301 - [N414KH](https://openairdocs.org/aircraft/N414KH): [Indian Flight LLC](https://openairdocs.org/faa-owner/INDIAN%20FLIGHT%20LLC), [Lake Placid, FL](https://openairdocs.org/faa-place/FL/Lake%20Placid), S/N 414-0915 - [N414TF](https://openairdocs.org/aircraft/N414TF): [Blue Sky Aviation LLC](https://openairdocs.org/faa-owner/BLUE%20SKY%20AVIATION%20LLC), [Columbia, TN](https://openairdocs.org/faa-place/TN/Columbia), built 1981, S/N 414A0676 - [N414TN](https://openairdocs.org/aircraft/N414TN): [Kellum Roman Micah](https://openairdocs.org/faa-owner/KELLUM%20ROMAN%20MICAH), [Alexander City, AL](https://openairdocs.org/faa-place/AL/Alexander%20City), built 1974, S/N 414-0491 - [N47AG](https://openairdocs.org/aircraft/N47AG): [Aircraft Guaranty Corp Trustee](https://openairdocs.org/faa-owner/AIRCRAFT%20GUARANTY%20CORP%20TRUSTEE), [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City), built 1972, S/N 340-0114 - [N500QV](https://openairdocs.org/aircraft/N500QV): [Jands LLC](https://openairdocs.org/faa-owner/JANDS%20LLC), [Broken Arrow, OK](https://openairdocs.org/faa-place/OK/Broken%20Arrow), built 1979, S/N 340A0699 - [N569JM](https://openairdocs.org/aircraft/N569JM): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1981, S/N 414A0425 - [N606PP](https://openairdocs.org/aircraft/N606PP): [Andriopulos Salguero Inc](https://openairdocs.org/faa-owner/ANDRIOPULOS%20SALGUERO%20INC), [Hialeah, FL](https://openairdocs.org/faa-place/FL/Hialeah), S/N 414-0416 - [N615SA](https://openairdocs.org/aircraft/N615SA): [Lordemann Holdings LLC](https://openairdocs.org/faa-owner/LORDEMANN%20HOLDINGS%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1978, S/N 340A0427 - [N64KT](https://openairdocs.org/aircraft/N64KT): [Klute Jordan](https://openairdocs.org/faa-owner/KLUTE%20JORDAN), [Omaha, NE](https://openairdocs.org/faa-place/NE/Omaha), built 1976, S/N 340A0045 - [N650BD](https://openairdocs.org/aircraft/N650BD): [V1vr LLC](https://openairdocs.org/faa-owner/V1VR%20LLC), [Saint Louis, MO](https://openairdocs.org/faa-place/MO/Saint%20Louis), built 1979, S/N 414A0404 - [N669JM](https://openairdocs.org/aircraft/N669JM): [Merrell Bros Aviation LLC](https://openairdocs.org/faa-owner/MERRELL%20BROS%20AVIATION%20LLC), [Kokomo, IN](https://openairdocs.org/faa-place/IN/Kokomo), built 1980, S/N 340A0971 - [N6827L](https://openairdocs.org/aircraft/N6827L): [Duke Aviation LLC](https://openairdocs.org/faa-owner/DUKE%20AVIATION%20LLC), [Woodridge, IL](https://openairdocs.org/faa-place/IL/Woodridge), built 1980, S/N 340A1219 - [N68KL](https://openairdocs.org/aircraft/N68KL): [Voloshin Vitaly](https://openairdocs.org/faa-owner/VOLOSHIN%20VITALY), [Seattle, WA](https://openairdocs.org/faa-place/WA/Seattle), built 1977, S/N 340A0258 - [N700HB](https://openairdocs.org/aircraft/N700HB): [Lucky7 Air LLC](https://openairdocs.org/faa-owner/LUCKY7%20AIR%20LLC), [Lenoir, NC](https://openairdocs.org/faa-place/NC/Lenoir), built 1982, S/N 414A0810 - [N740WJ](https://openairdocs.org/aircraft/N740WJ): [Alm Holding LLC](https://openairdocs.org/faa-owner/ALM%20HOLDING%20LLC), [Winton, CA](https://openairdocs.org/faa-place/CA/Winton), built 1979, S/N 340A0740 - [N777D](https://openairdocs.org/aircraft/N777D): [Pittsburgh Institute Of Aeronautics](https://openairdocs.org/faa-owner/PITTSBURGH%20INSTITUTE%20OF%20AERONAUTICS), [West Mifflin, PA](https://openairdocs.org/faa-place/PA/West%20Mifflin), built 1981, S/N 340A-1257 - [N77BR](https://openairdocs.org/aircraft/N77BR): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1975, S/N 340A-0053 - [N789MD](https://openairdocs.org/aircraft/N789MD): [340a1021 Inc Trustee](https://openairdocs.org/faa-owner/340A1021%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1980, S/N 340A1021 - [N789PT](https://openairdocs.org/aircraft/N789PT): [Valiair Limited Company](https://openairdocs.org/faa-owner/VALIAIR%20LIMITED%20COMPANY), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1985, S/N 414A1209 - [N87536](https://openairdocs.org/aircraft/N87536): [Krull Jesse L](https://openairdocs.org/faa-owner/KRULL%20JESSE%20L), [Bismarck, ND](https://openairdocs.org/faa-place/ND/Bismarck), built 1981, S/N 340A1254 - [N8789B](https://openairdocs.org/aircraft/N8789B): [Bearcat Aviation LLC](https://openairdocs.org/faa-owner/BEARCAT%20AVIATION%20LLC), [Joplin, MO](https://openairdocs.org/faa-place/MO/Joplin), built 1980, S/N 414A0605 - [N92WH](https://openairdocs.org/aircraft/N92WH): [322ee Aviation LLC](https://openairdocs.org/faa-owner/322EE%20AVIATION%20LLC), [Union, KY](https://openairdocs.org/faa-place/KY/Union), built 1977, S/N 340A0271 All 52: https://openairdocs.org/engine/continental-tsio-520-nb/aircraft.md ## 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 WPR22FA309](https://openairdocs.org/ntsb/WPR22FA309), Aug 18, 2022: Cessna 340A (N740WJ), Watsonville, CA, destroyed, 3 fatal. Probable cause: The failure of the pilot of the multi-engine airplane to see and avoid the single-engine airplane while performing a straight-in approach for landing. - [NTSB GAA22WA093](https://openairdocs.org/ntsb/GAA22WA093), Feb 6, 2022: Cessna 340A (N340YZ), Bussy-Lettrée, France, incident, no damage - [NTSB CEN14WA248](https://openairdocs.org/ntsb/CEN14WA248), Feb 18, 2014: Cessna 340 (N876DT), Toussus-Le-Noble, France, substantial damage - [NTSB CEN12WA664](https://openairdocs.org/ntsb/CEN12WA664), Sep 30, 2012: Cessna 414A (N738W), Innsbruck, Austria, destroyed, 6 fatal - [NTSB MKC79FCJ09](https://openairdocs.org/ntsb/MKC79FCJ09), Feb 17, 1979: Cessna 414A (N30FB), Lincoln, NE, substantial damage ## FAA accident and incident reports (8) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 20240830012979I](https://openairdocs.org/incident/20240830012979I), Aug 30, 2024: Cessna 414A (N8789B), Tulsa, OK, Minor damage. During crusie level flight at 16K rapid decompression, the front right windscreen was completely blew out, diverted, landed without further incident. The… - [Incident 20220224012059I](https://openairdocs.org/incident/20220224012059I), Feb 24, 2022: Cessna 414 (N414KH), Charleston, SC, Minor damage. Pilot landed on runway 15, made a right turn onto taxiway a, followed by a left turn onto taxiway g. he informed ground that he thought he might have run over… - [Incident 20190516004749I](https://openairdocs.org/incident/20190516004749I), May 16, 2019: Cessna 414 (N414TN), Fort Lauderdale, FL, Minor damage. 1. Description of incident: airplane was being taxied from hanger to runway 09. While on taxi way "b" to taxi way "e" the pilot applied the brakes and the… - [Incident 20170818015839I](https://openairdocs.org/incident/20170818015839I), Aug 18, 2017: Cessna 414A (N8789B), Muscle Shoals, AL, Minor damage. While at 15,000 ft. MSL, en route from kmkl to kdts , the right engine manifold pressure decayed. The right manifold pressure began to increase with right… - [Incident 20160512006409I](https://openairdocs.org/incident/20160512006409I), May 12, 2016: Cessna 414A (N379TW), Norfolk, NE, Minor damage. Pilot reported that while performing touch and goes in N379TW, Cessna 414A, at the Norfolk regional airport (ofk), the aircraft propellers contacted the… - [Incident 20140311002619I](https://openairdocs.org/incident/20140311002619I), Mar 11, 2014: Cessna 414 (N606PP), Lantana, FL, Minor damage. Aircraft landed on paved runway "touchdown zone" and the left main gear collasped. Aircraft slid down the runway then veared off the right side of runway into… - [Incident 19860622061259I](https://openairdocs.org/incident/19860622061259I), Jun 22, 1986: Cessna 414 (N414TF), Port Aransas, TX, Minor damage. Aircraft wing tip struck parked aircraft during taxi. - [Accident 19790217005789A](https://openairdocs.org/incident/19790217005789A), Feb 17, 1979: Cessna 414A (N30FB), Lincoln, NE, Substantial damage. Pilot's attention was diverted during take-off and aircraft hit snowbank. IFR conditions existed. ## Service difficulty reports (310, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2025F00273](https://openairdocs.org/sdr/2025F00273), Nov 26, 2025: SUPPORT. CORRODED. DURING A PREFLIGHT WALKAROUND, SURFACE CORROSION WAS OBSERVED ON THE VERTICAL STABILIZER AFT SECTION. AFTER CLOSER INSPECTION SEVERE DELAMINATION WAS SEEN ON TH - [SDR KISA202602050001](https://openairdocs.org/sdr/KISA202602050001), Nov 25, 2025: ANGLE. CORRODED. DURING A PREFLIGHT WALK AROUND CORROSION WAS OBSERVED ON THE AFT SPAR ANGLE CHANNEL OF THE VERTICAL STABILIZER. UPON FURTHER INVESTIGATION SIGNIFICANT INTERGRAN - [SDR 2025FA0000646](https://openairdocs.org/sdr/2025FA0000646), Sep 16, 2025: INTAKE DUCT. RUPTURED. R/H ENGINE MP WILL NOT GO OVER 32 INCHES ABOVE 15,000. PRESSURE TESTED THE RH ENGINE INTAKE SYSTEM AND FOUND THE REAR INTAKE PIPE TORN. - [SDR 2022F00516](https://openairdocs.org/sdr/2022F00516), Dec 13, 2022: TACH GENERATOR. SEIZED. THE LH TACH GENERATOR SEIZED INTERNALLY CAUSING THE LH TACHOMETER INDICATION TO FALL TO ZERO. - [SDR 2021FA0000112](https://openairdocs.org/sdr/2021FA0000112), Apr 20, 2021: DRIVE SHAFT. SHEARED. LEFT ALTERNATOR FAIL ANNUNCIATOR LIGHT ILLUMINATED. NO VOLTAGE INDICATION ON LEFT ALTERNATOR. WIRING TERMINALS WERE INTACT AND FIELD VOLTAGE WAS PRESENT. INSPEC - [SDR S1ZA202102000005](https://openairdocs.org/sdr/S1ZA202102000005), Mar 1, 2021: BULKHEAD. CRACKED. RIGHT MAIN FUEL TANK (TIP TANK) AFT BULKHEAD (PN: 0823400-109) CRACKED IN UPPER RADIUS. THIS BULK HEAD IS AN EXTENSION OF THE AFT WING SPARE IS THE ONLY ONE OF - [SDR 2021FA0000033](https://openairdocs.org/sdr/2021FA0000033), Feb 3, 2021: BELLCRANK. CRACKED. R/H INNER GEAR DOOR BELLCRANK IDLER HAD BROKEN IN TWO PIECES. CUSTOMER BOUGHT A NEW PART WITH HIM TO INSTALL. BREAKAGE LOOKED CLEAN WITH NO CORROSION AT THE BRE - [SDR S1ZA2019120500003](https://openairdocs.org/sdr/S1ZA2019120500003), Dec 5, 2019: CRANKCASE. CRACKED. CRACKED CRANK CASE. REMOVED ALL CYLINDERS DUE TO 4 BEING LOW COMPRESSION. 2 OTHER CYLINDERS WERE RECENTLY REPLACED BY PERSONS UNKNOWN AT EXACT TIME UNKNOWN. I F - [SDR 2019FA0000053](https://openairdocs.org/sdr/2019FA0000053), Mar 1, 2019: WIRE. CHAFED. SAW A SMALL PUFF OF SMOKE WHEN THE HEATER WAS TURNED OFF. THE FOLLOWING MORNING A FUNCTION TEST OF THE HEATER WAS PERFORMED AND A SMALL FIRE BROKE OUT. UPON INS - [SDR CCJA201809105016](https://openairdocs.org/sdr/CCJA201809105016), Sep 7, 2018: COLLAR. SPALLED. INSTALLED ENGINE AFTER OVERHAUL. AFTER THIRD START, THE PROPELLER FEATHERED. FOUND OIL TRANSFER COLLAR SPALLED/GROOVED. ENGINE HAD LESS THAN 3 MINUTES TOTAL TIM - [SDR CA180907011](https://openairdocs.org/sdr/CA180907011), Sep 7, 2018: CLAMP. CRACKED. (CAN) DURING ANNUAL INSPECTION AS WELL AS IN CONJUNCTION WITH AD 2000-01-16, THE V-BAND CLAMP THAT ATTACHES THE WASTEGATE EXHAUST ELBOW TO THE EXHAUST HEADER AS - [SDR CCJA2018091005001](https://openairdocs.org/sdr/CCJA2018091005001), Sep 5, 2018: CAMSHAFT. SPALLED. SPALLED CAMSHAFT. - [SDR CCJA2018091005002](https://openairdocs.org/sdr/CCJA2018091005002), Sep 5, 2018: LIFTER. SPALLED. LEFT ENGINE HAS SPALLED INTAKE LIFTERS. - [SDR CCJA201809105003](https://openairdocs.org/sdr/CCJA201809105003), Sep 5, 2018: LIFTER. SPALLED. LEFT ENGINE HAS SPALLED EXHAUST LIFTERS. - [SDR CCJA201809105009](https://openairdocs.org/sdr/CCJA201809105009), Sep 5, 2018: CAMSHAFT. SPALLED. RIGHT ENGINE HAS SPALLED CAMSHAFT. - [SDR CCJA201809105010](https://openairdocs.org/sdr/CCJA201809105010), Sep 5, 2018: LIFTER. SPALLED. FOUND SPALLED INTAKE LIFTER ON RIGHT HAND ENGINE. - [SDR CCJA201809105011](https://openairdocs.org/sdr/CCJA201809105011), Sep 5, 2018: LIFTER. SPALLED. FOUND SPALLED EXHAUST LIFTER ON RIGHT HAND ENGINE. - [SDR CCJA20180905004](https://openairdocs.org/sdr/CCJA20180905004), Sep 5, 2018: CYLINDER HEAD. CRACKED. FOUND #1 (S/N: 65688-04), #3 (S/N: 65976-01), #4 (S/N: 65937-18), #5 (S/N: 66237-24) AND #6 (S/N: 65025-20) CYLINDERS CRACKED AT CYLINDER HEAD ON LEFT ENGINE DU - [SDR CCJA20180905012](https://openairdocs.org/sdr/CCJA20180905012), Sep 5, 2018: CYLINDER HEAD. CRACKED. FOUND #2 (S/N: 65537-01), #3 (S/N: 65656-01), #5 (S/N: 65537-08) AND #6 (S/N: 65622-07) CYLINDERS CRACKED AT CYLINDER HEAD ON RIGHT ENGINE DURING 100 HOUR INSPE - [SDR 2RM2017F00000](https://openairdocs.org/sdr/2RM2017F00000), Oct 17, 2017: LIFTER. SPALLED. ENGINE WAS DISASSEMBLED FOR PROP STRIKE INSPECTION. FOUND LIFTERS BEGINNING TO SPALL AND WERE REPLACED WITH NEW LIFTERS AT THIS TIME TO PREVENT DAMAGE TO CAMSHA - [SDR 2RM2017F00001](https://openairdocs.org/sdr/2RM2017F00001), Oct 17, 2017: LIFTER. SPALLED. ENGINE WAS DISASSEMBLED FOR PROP STRIKE INSPECTION. FOUND LIFTERS BEGINNING TO SPALL AND WERE REPLACED WITH NEW LIFTERS AT THIS TIME TO PREVENT DAMAGE TO CAMSHA - [SDR 2017FA0000259](https://openairdocs.org/sdr/2017FA0000259), Jun 13, 2017: CRANKSHAFT. BROKEN. THE PILOT REPORTED HEARING A LOUD POP FROM THE NR 1 ENGINE ON TAKEOFF AND A NEAR COMPLETE LOSS OF RPM. THE ENGINE WAS SUBSEQUENTLY REMOVED AND DISASSEMBLED. THE - [SDR 2017FA0000180](https://openairdocs.org/sdr/2017FA0000180), May 3, 2017: BELLCRANK. CRACKED. DURING THE TAKEOFF ROLL, THE PILOT'S SEAT SUDDENLY BROKE LOOSE AND MOVED FULL AFT. THE CAUSE WAS FOUND TO BE A CRACKED BELLCRANK TUBE UNDER THE PILOT'S SEAT. I - [SDR 2017FA0000348](https://openairdocs.org/sdr/2017FA0000348), Apr 19, 2017: CYLINDER HEAD. CRACKED. CRACKS IN THE HEADS ABOVE THE INTAKE PORT IN BOTH CYLINDERS. FUEL STAINING ON THE EXTERIOR OF THE HEAD. THIS IS THE THIRD AND FOURTH CYLINDERS THAT HAVE BEEN RE - [SDR 2017FA0000356](https://openairdocs.org/sdr/2017FA0000356), Mar 17, 2017: LIFTER. SPALLED. BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT AND METAL CONTAMINATION TO ENGINE. - [SDR 2017FA0000361](https://openairdocs.org/sdr/2017FA0000361), Mar 17, 2017: LIFTER. FAILED. BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT AND METAL CONTAMINATION TO ENGINE. - [SDR 2017FA0000363](https://openairdocs.org/sdr/2017FA0000363), Mar 17, 2017: LIFTER. SPALLED. BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT AND METAL CONTAMINATION TO ENGINE. - [SDR 2017FA0000022](https://openairdocs.org/sdr/2017FA0000022), Jan 24, 2017: MANIFOLD. FLUCTUATES. RIGHT ENGINE MANIFOLD PRESSURE FLUCTUATING IN FLIGHT - [SDR 2017F00009](https://openairdocs.org/sdr/2017F00009), Dec 22, 2016: OIL FILTER. LEAKING. HAVE FOUND THREE OIL FILTERS LEAKING FROM THE HEX TO BODY CONNECTION. - [SDR 2017FA0000013](https://openairdocs.org/sdr/2017FA0000013), Dec 13, 2016: SELECTOR VALVE. MALFUNCTIONED. TO BALANCE FUEL IN FLIGHT, LEFT FUEL SELECTOR HANDLE MOVED FROM LEFT MAIN TO RIGHT MAIN. BOTH FUEL BOOST PUMPS REMAINED ON. AFTER FUEL LEVELS BALANCED, LEFT FUE - [SDR 2016FA0000419](https://openairdocs.org/sdr/2016FA0000419), Aug 19, 2016: CONTROL VALVE. SHORTED. WHEN ATTEMPTING NORMAL HYDRAULIC EXTENSION OF LANDING GEAR WITH THE SWITCH, HEARD A RAPID BANGING FROM NOSE GEAR. RED GEAR UNLOCKED LIGHT FLICKERED. LANDING GEA - [SDR 2016FA0000299](https://openairdocs.org/sdr/2016FA0000299), Jun 8, 2016: ENGINE. MALFUNCTIONED. WHILE CRUISING AT 10,000 FEET, THE LT ENGINE STARTED VIBRATING, IDENTIFYING ON THE ENGINE INSTRUMENTS AN RPM FLUCTUATION OF +/- 300 RPMS, PROCEEDED TO REDUCE EN - [SDR EWFA2016FA0000022](https://openairdocs.org/sdr/EWFA2016FA0000022), Jan 15, 2016: CYLINDER HEAD. CRACKED. NEW VIBRATION NOTICED DURING CRUISE. ONCE NORMAL DESCENT AND LANDING WAS MADE, ENGINE WAS INSPECTED AND WHOLE IN EXHAUST SIDE OF CYLINDER NR 1 DISCOVERED. - [SDR CA151209003](https://openairdocs.org/sdr/CA151209003), Nov 22, 2015: WINDOW. CRACKED. (CAN) PILOT HEARD THE SIDE WINDOW CRACK WHEN HE WAS CRUISING AT 13,000 FT. WITH THE ACFT PRESSURIZED. THE WINDOW CRACKED FROM THE LOWER FORWARD EDGE TO THE STOR - [SDR YWYR2015112400001](https://openairdocs.org/sdr/YWYR2015112400001), Nov 16, 2015: CYLINDER. CRACKED. WHILE PERFORMING VISUAL INSPECTION DURING ANNUAL INSPECTION, TECH NOTED STAINING BETWEEN CYLINDER FINS ON INTAKE SIDE OF CYLINDER NR 6 ON RT ENGINE. CYLINDER CO - [SDR 4MCA2015F00094](https://openairdocs.org/sdr/4MCA2015F00094), Aug 4, 2015: MAGNETO. MALFUNCTIONED. ATC KEPT ACFT AT 3000 FT FOR APPROXIMATELY 15 MINUTES. DURING THIS TIME, KEPT FULL POWER AND MIXTURE FULL RICH, WAS EXPECTING A CLIMB TO FILED ALTITUDE. AFTER A - [SDR BGJA20150721001](https://openairdocs.org/sdr/BGJA20150721001), Jul 15, 2015: WASTEGATE VALVE. FAILED. DURING TAKEOFF ROLL, THE RT ENG WOULD NOT MAKE FULL POWER. THE PILOT CANCELLED THE TAKEOFF & RETURNED TO THE SHOP. THE ACFT NEVER LEFT THE GND. MX WAS NOTIFIED - [SDR BGJA20150721002](https://openairdocs.org/sdr/BGJA20150721002), Jul 15, 2015: PUMP. FAILED. DURING TAKEOFF ROLL THE RIGHT ENGINE WOULD NOT MAKE FULL POWER. THE PILOT CANCELLED THE TAKEOFF AND RETURNED TO THE SHOP. THE AIRCRAFT NEVER LEFT THE GROUND. MA - [SDR CA150715005](https://openairdocs.org/sdr/CA150715005), Jul 15, 2015: CYLINDER. CRACKED. (CAN) AIRCRAFT EXPERIENCED SLIGHTLY ABOVE NORMAL CYLINDER HEAD TEMP ON NR 2 & 4 CYLINDER AFTER LEVEL OFF AT CRUISE ALTITUDE. VISUAL INSPECTION VERIFIED FAILED C - [SDR BPY2015F00000](https://openairdocs.org/sdr/BPY2015F00000), Feb 3, 2015: CONNECTING ROD. BROKEN. DURING CRUISE FLIGHT, NR 1 AND NR 2 CONNECTING RODS FAILED AT THE CRANK JOURNALS CAUSING THE ENGINE TO SEIZE. THE RODS BROKE BOTH CASE HALVES AND THE LT MAGNETO - [SDR 2014FA0000602](https://openairdocs.org/sdr/2014FA0000602), Sep 16, 2014: PISTON RING. FAILED. ENROUTE, IFR AT 17000 FT WHEN PILOT NOTICED DROP IN MANIFOLD PRESSURE. PILOT REDUCED POWER SETTINGS AND STARTED DESCENT . NEXT OIL PRESSURE AND MANIFOLD PRESSUR - [SDR BIGR20140725001](https://openairdocs.org/sdr/BIGR20140725001), Jul 20, 2014: ALTERNATOR. FRACTURED. THE RT ENGINE LOCKED UP DURING FLIGHT GOING INTO FEATHER AND COULD NOT BE RESTARTED. MAINTENANCE FOUND THE ENGINE NEARLY LOCKED UP BUT COULD STILL BE TURNED WIT - [SDR CA140624004](https://openairdocs.org/sdr/CA140624004), Jun 24, 2014: CYLINDER. CRACKED. (CAN) OWNER REQUESTED TO HAVE LT AND RT ENGINE INTAKE PIPE GASKETS REPLACED. DURING GASKET REPLACEMENT THE CYLINDERS WERE INSPECTED INSIDE THE INTAKE PORTS RESU - [SDR CA140630025](https://openairdocs.org/sdr/CA140630025), May 5, 2014: LINE. CHAFED. (CAN) WHILE REMOVING THE ENGINE FROM THE AIRFRAME, THE OIL LINE BETWEEN THE WASTEGATE CONTROLLER AND ABSOLUTE PRESSURE CONTROLLER WAS FOUND TO BE CHAFING AGAINS - [SDR CA140630024](https://openairdocs.org/sdr/CA140630024), May 3, 2014: CYLINDER HEAD. SEPARATED. (CAN) THE NR 6 CYLINDER HEAD SEPARATED BY FAILING THOUGH THE ALUMINUM CASTING. ENGINE WAS SHUTDOWN AND PROP FEATHERED AND LANDING WAS CARRIED OUT. THE ENGINE IS - [SDR N3SA2014FA0000199](https://openairdocs.org/sdr/N3SA2014FA0000199), Mar 28, 2014: SUPPRESSOR. ARCED. SMOKE IN COCKPIT AFTER ACTIVATING WINDSHIELD HEAT. WINDSHIELD SUPPRESSOR ACRED. - [SDR 2014FA0000156](https://openairdocs.org/sdr/2014FA0000156), Mar 13, 2014: LANDING GEAR. COLLAPSED. LEFT MLG COLLAPSED ON LANDING ROLLOUT. - [SDR 9BYR2014022000091](https://openairdocs.org/sdr/9BYR2014022000091), Feb 12, 2014: CYLINDER HEAD. CRACKED. PILOT STATED LOSS OF POWER/ROUGH RUNNING. DURING INVESTIGATION FOUND CYLINDER NR 3 CRACKED FROM TOP SPARK PLUG HOLE TO EXHAUST VALVE. CYLINDER NR 2 HEAD HAD SEP - [SDR BGJA20140501001](https://openairdocs.org/sdr/BGJA20140501001), Feb 2, 2014: CYLINDER. CRACKED. DURING INSPECTION WE FOUND THE NR 3 CYLINDER TO HAVE A CRACK & WAS LEAKING FUEL DOWN ON TO THE INTAKE PIPE. PROCEEDED TO INSPECT THE CYLINDER & IT WAS FOUND TO - [SDR 2013FA0000681](https://openairdocs.org/sdr/2013FA0000681), Nov 23, 2013: CYLINDER. CRACKED. CRACKED ENGINE CYLINDER. All 310: https://openairdocs.org/engine/continental-tsio-520-nb/reports.md ## STCs that may be installed (OpenAirDocs) (66, 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 SE70RM](https://openairdocs.org/stc/SE70RM): Installation of compressor bracket. Air Comm Corporation - [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc - [STC SE1186SW](https://openairdocs.org/stc/SE1186SW): Regrooving of pistons P/N 631475 or P/N 632585. Continental Motors, Inc - [STC SE2340SW](https://openairdocs.org/stc/SE2340SW): Installation of modified cylinder assemblies, barrels, piston, and repaired crankcases. Continental Motors, Inc - [STC SE5820SW](https://openairdocs.org/stc/SE5820SW): Installation of Airmotive exhaust valve, P/N AEC-637781. Continental Motors, Inc. Lists 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 SE00081LA](https://openairdocs.org/stc/SE00081LA): Modification of induction system. TC SKYROCKET LLC - [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 SE09104SC-D](https://openairdocs.org/stc/SE09104SC-D): Modify Teledyne Continental TSIO-520-NB engine. Maximum continuous power is 335 hp at 2700 rpm and 38.0 inches Hg manifold pressure. This mod is limited to Teledyne Continental motors model TSIO-520-NB engines modified per STC SE4327SW. RAM Aircraft Limited Partnership - [STC SE09259SC-D](https://openairdocs.org/stc/SE09259SC-D): Installation of RAM Aircraft Corporation oil cooler. 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 SE4327SW-D](https://openairdocs.org/stc/SE4327SW-D): Increase all operations power rating to 325 horse power (HP) at 40 inches of manifold pressure (MP) and 2700 RPM. 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 SE2831SW-D](https://openairdocs.org/stc/SE2831SW-D): Installation of Bendix S6RN-1251 and S6RN-1255 magnetos. RAM Aircraft Limited Partnership - [STC SE3714SW-D](https://openairdocs.org/stc/SE3714SW-D): Install RAM economy camshaft and modified cylinders. 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 SE4159NM](https://openairdocs.org/stc/SE4159NM): Installation of American Aviation Inc., intercooler and associated systems. American Aviation Inc - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE2831SW](https://openairdocs.org/stc/SE2831SW): Bendix S6RN-1251 and S6RN-1255 magnetos. RAM Aircraft Limited Partnership - [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 SE3714SW](https://openairdocs.org/stc/SE3714SW): Install RAM economy camshaft and modified cylinders. RAM Aircraft Limited Partnership - [STC SE4327SW](https://openairdocs.org/stc/SE4327SW): Increase all operation power rating to 325 horsepower (hp) at 40 inches of manifold pressure (MP) and 2700 RPM. 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 SE00223SE](https://openairdocs.org/stc/SE00223SE): Installation of Auto-Valve Inc oil drain valve. Rocket Engineering Corporation - [STC SE8687SW](https://openairdocs.org/stc/SE8687SW): Regrooving of pistons P/N 631475 or P/N 632585. Capehart Industries, Inc. Lists TSIO-520 Series All 66: https://openairdocs.org/engine/continental-tsio-520-nb/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.