# Continental TSIO-520-UB - Type: Engine model (FAA registry) - Registry codes: 17271, 17061 - Manufacturer (registry): CONT MOTOR - Model: TSIO-520-UB - Engine type: Turbo-prop - Power: 300 hp - Data sheet: [TCDS E8CE](https://openairdocs.org/tcds/E8CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 27 registered aircraft - Page: https://openairdocs.org/engine/continental-tsio-520-ub Model codes come from the FAA registry's reference file. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all. ## 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 97-26-17](https://openairdocs.org/ad/97-26-17): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 90 more. Effective Jan 23, 1998 - [AD 96-12-22](https://openairdocs.org/ad/96-12-22): Full Flow Engine Oil Adapter · Bellanca CH-300 Pacemaker, 120, 140 and 361 more. Effective Jul 31, 1996 - [AD 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 1995 - [AD 93-16-15](https://openairdocs.org/ad/93-16-15): Fuel Pump Drive Shaft · Continental Motors IO-520-B, IO-520-BA, IO-520-BB and 27 more. Effective Dec 14, 1993 - [AD 93-08-17](https://openairdocs.org/ad/93-08-17): Oil Pick-Up Tube · Continental Motors IO-470-A, IO-470-C, IO-470-D and 104 more. Effective Aug 23, 1993 - [AD 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993 - [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991 - [AD 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 89-24-03](https://openairdocs.org/ad/89-24-03): Turbocharger Inlet Assembly · Continental Motors TSIO-520-UB. Effective Jun 18, 1990 - [AD 88-17-03](https://openairdocs.org/ad/88-17-03): Starter Adapter Shaftgear Assembly · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Aug 10, 1988 - [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 87-14-02](https://openairdocs.org/ad/87-14-02): Starter Adapter Shaftgear · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Oct 5, 1987 - [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 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 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 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 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) (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 (27) - [N101KG](https://openairdocs.org/aircraft/N101KG): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1983, S/N EA392 - [N11RM](https://openairdocs.org/aircraft/N11RM): [Haig Amy](https://openairdocs.org/faa-owner/HAIG%20AMY), [Redlands, CA](https://openairdocs.org/faa-place/CA/Redlands), built 1993, S/N EA-553 - [N134RD](https://openairdocs.org/aircraft/N134RD): [Devere Albert R](https://openairdocs.org/faa-owner/DEVERE%20ALBERT%20R), [Warrenton, VA](https://openairdocs.org/faa-place/VA/Warrenton), built 1955, S/N BG-11 - [N207DF](https://openairdocs.org/aircraft/N207DF): [Double R Air LLC](https://openairdocs.org/faa-owner/DOUBLE%20R%20AIR%20LLC), [Miami, FL](https://openairdocs.org/faa-place/FL/Miami), built 1978, S/N 20700430 - [N2155N](https://openairdocs.org/aircraft/N2155N): [Flight Test Affiliates LLC](https://openairdocs.org/faa-owner/FLIGHT%20TEST%20AFFILIATES%20LLC), [Flagler Beach, FL](https://openairdocs.org/faa-place/FL/Flagler%20Beach), built 1981, S/N EA-255 - [N225CR](https://openairdocs.org/aircraft/N225CR): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1982, S/N EA 317 - [N3070T](https://openairdocs.org/aircraft/N3070T): [Jacobson Jeffery L](https://openairdocs.org/faa-owner/JACOBSON%20JEFFERY%20L), [Manning, ND](https://openairdocs.org/faa-place/ND/Manning), built 1987, S/N EA-462 - [N30LF](https://openairdocs.org/aircraft/N30LF): [Signalwave LLC](https://openairdocs.org/faa-owner/SIGNALWAVE%20LLC), [Doral, FL](https://openairdocs.org/faa-place/FL/Doral), built 1980, S/N EA-122 - [N324GT](https://openairdocs.org/aircraft/N324GT): [324 Aviation LLC](https://openairdocs.org/faa-owner/324%20AVIATION%20LLC), [Cavour, SD](https://openairdocs.org/faa-place/SD/Cavour), built 1979, S/N EA-38 - [N32TB](https://openairdocs.org/aircraft/N32TB): [Boyland Todd](https://openairdocs.org/faa-owner/BOYLAND%20TODD), [Solon, OH](https://openairdocs.org/faa-place/OH/Solon), built 1980, S/N EA-77 - [N361KW](https://openairdocs.org/aircraft/N361KW): [Fliteco Holdings LLC](https://openairdocs.org/faa-owner/FLITECO%20HOLDINGS%20LLC), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 1981, S/N EA-264 - [N417WC](https://openairdocs.org/aircraft/N417WC): [Mpi Warehouse Specialty Company Inc](https://openairdocs.org/faa-owner/MPI%20WAREHOUSE%20SPECIALTY%20COMPANY%20INC), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1985, S/N EA 451 - [N434CC](https://openairdocs.org/aircraft/N434CC): [Lambo Air LLC](https://openairdocs.org/faa-owner/LAMBO%20AIR%20LLC), [Springtown, TX](https://openairdocs.org/faa-place/TX/Springtown), built 1982, S/N EA-321 - [N4474M](https://openairdocs.org/aircraft/N4474M): [N4474m Inc](https://openairdocs.org/faa-owner/N4474M%20INC), [Camarillo, CA](https://openairdocs.org/faa-place/CA/Camarillo), built 2001, S/N EA-674 - [N523DB](https://openairdocs.org/aircraft/N523DB): [N523db LLC](https://openairdocs.org/faa-owner/N523DB%20LLC), [Santa Ana, CA](https://openairdocs.org/faa-place/CA/Santa%20Ana), built 1999, S/N EA-643 - [N6387U](https://openairdocs.org/aircraft/N6387U): [Weyermuller Scott P](https://openairdocs.org/faa-owner/WEYERMULLER%20SCOTT%20P), [Bossier City, LA](https://openairdocs.org/faa-place/LA/Bossier%20City), S/N EA-291 - [N63JN](https://openairdocs.org/aircraft/N63JN): [Desert Air Inc](https://openairdocs.org/faa-owner/DESERT%20AIR%20INC), [Phoenix, AZ](https://openairdocs.org/faa-place/AZ/Phoenix), built 1997, S/N EA602 - [N640MC](https://openairdocs.org/aircraft/N640MC): [Conston Kenneth M](https://openairdocs.org/faa-owner/CONSTON%20KENNETH%20M), [Hopewell Junction, NY](https://openairdocs.org/faa-place/NY/Hopewell%20Junction), built 2001, S/N EA-682 - [N644BL](https://openairdocs.org/aircraft/N644BL): [Gahan Matthew](https://openairdocs.org/faa-owner/GAHAN%20MATTHEW), [San Clemente, CA](https://openairdocs.org/faa-place/CA/San%20Clemente), built 1989, S/N EA492 - [N6529R](https://openairdocs.org/aircraft/N6529R): [N6529r LLC](https://openairdocs.org/faa-owner/N6529R%20LLC), [Merritt Island, FL](https://openairdocs.org/faa-place/FL/Merritt%20Island), built 1982, S/N EA-322 - [N66585](https://openairdocs.org/aircraft/N66585): [Haines Jay A](https://openairdocs.org/faa-owner/HAINES%20JAY%20A), [Summerland Key, FL](https://openairdocs.org/faa-place/FL/Summerland%20Key), built 1983, S/N EA-353 - [N6745Y](https://openairdocs.org/aircraft/N6745Y): [Seamech International Inc](https://openairdocs.org/faa-owner/SEAMECH%20INTERNATIONAL%20INC), [Houston, TX](https://openairdocs.org/faa-place/TX/Houston), built 1984, S/N EA-401 - [N67DF](https://openairdocs.org/aircraft/N67DF): [Susens Dennis W](https://openairdocs.org/faa-owner/SUSENS%20DENNIS%20W), [Columbia Falls, MT](https://openairdocs.org/faa-place/MT/Columbia%20Falls), built 1998, S/N 98191 - [N683SD](https://openairdocs.org/aircraft/N683SD): [Murray Steven L](https://openairdocs.org/faa-owner/MURRAY%20STEVEN%20L), [Webster, NY](https://openairdocs.org/faa-place/NY/Webster), built 1980, S/N EA-148 - [N747YV](https://openairdocs.org/aircraft/N747YV): [Great Among The Nations Inc](https://openairdocs.org/faa-owner/GREAT%20AMONG%20THE%20NATIONS%20INC), [Beverly Hills, CA](https://openairdocs.org/faa-place/CA/Beverly%20Hills), built 1999, S/N EA-642 - [N908DB](https://openairdocs.org/aircraft/N908DB): [B36 LLC](https://openairdocs.org/faa-owner/B36%20LLC), [Winter Park, FL](https://openairdocs.org/faa-place/FL/Winter%20Park), built 2002, S/N EA-694 - [N928KM](https://openairdocs.org/aircraft/N928KM): [Schmoker William C](https://openairdocs.org/faa-owner/SCHMOKER%20WILLIAM%20C), [Eden Prairie, MN](https://openairdocs.org/faa-place/MN/Eden%20Prairie), built 2001, S/N EA-672 ## NTSB investigations (2) 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 ERA21FA154](https://openairdocs.org/ntsb/ERA21FA154), Mar 15, 2021: Beech B36 (N236BC), Pembroke Pines, FL, destroyed, 3 fatal. Probable cause: The pilot’s likely activation of the auxiliary fuel pump to “high” for undetermined reasons during takeoff, which resulted in total loss of engine power due to an excessively rich fuel-to-air… - [NTSB CEN20LA004](https://openairdocs.org/ntsb/CEN20LA004), Oct 6, 2019: Beech B36 (N36LS), Ranger, TX, substantial damage. Probable cause: A lack of climb performance after takeoff for reasons that could not be determined based on the available information. ## FAA accident and incident reports (5) 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 20210315002229A](https://openairdocs.org/incident/20210315002229A), Mar 15, 2021: Beech B36TC (N236BC), Pempbroke Pines, FL, Destroyed, 3 fatal. Aircraft N236BE was operating VFR and had departed runway 10L from hwo airport on March 15, 2021 at approximately 1510 local. At approximately 300 feet after… - [Accident 20191006019009A](https://openairdocs.org/incident/20191006019009A), Oct 6, 2019: Beech B36TC (N36LS), Ranger, TX, Substantial damage. ? On October 6, 2019, at 0945 CDT, a Beechcraft B36TC bearing registration number N36LS, registered to a private owner, collided with terrain as it departed… - [Incident 20120619017119I](https://openairdocs.org/incident/20120619017119I), Jun 19, 2012: Raytheon Aircraft Company B36TC (N63JN), White Plains, NY, Minor damage. Pilot was on a visual approach to runway 16 at Westchester County Airport (khpn) and attempted to fly a short approach and land on the runway numbers. The… - [Incident 20031004026999I](https://openairdocs.org/incident/20031004026999I), Oct 4, 2003: Beech B36TC (N417WC), Steamboat Spgs, CO, Minor damage. (-23) Aircraft failed to rotate to pilot's satisfaction, takeoff was aborted, aircraft rolled off end of runway 32 at sbs. Aircraft may have been overloaded… - [Incident 20020617015579I](https://openairdocs.org/incident/20020617015579I), Jun 17, 2002: Beech B36TC (N6529R), Eagle, CO, Minor damage. (-23) Aircraft lost electrical power in the vicinity of Eagle county airport. Pilot decided to land at Eagle county airport with no communication with the… ## Service difficulty reports (31) As reported by operators and repair stations, by the model named in the report. - [SDR 2014FA0000700](https://openairdocs.org/sdr/2014FA0000700), Dec 12, 2014: CYLINDER HEAD. CRACKED. DURING AN INSPECTION, IT WAS NOTICED ON THE TOP COWL BLACK SOOT NEAR CYLINDER NR 5. COMPRESSION TEST DONE AND CYLINDER SPRAYED WITH SOAP SOLUTION. BUBBLES WERE - [SDR 2014FA0000001](https://openairdocs.org/sdr/2014FA0000001), Jan 3, 2014: PLATE. CRACKED. ENGINE WAS IN OVERHAUL, A REBUILT TURBOCHARGER WAS INSTALLED ON THE ENGINE AT THAT TIME. THE ENGINE WAS INSTALLED, THE TURBOCHARGER WAS REMOVED DUE TO AN OIL LE - [SDR 2011FA0000456](https://openairdocs.org/sdr/2011FA0000456), Jun 22, 2011: MOTOR. FAILED. AIR-CONDITIONING VENT BLOWER MOTOR FAILED INTERNALLY. SHORTED-OUT AND FILLED THE COCKPIT/CABIN WITH SMOKE. REPLACED WITH NEW UNIT. OPS CKD OK. - [SDR 2011FA0000405](https://openairdocs.org/sdr/2011FA0000405), Jun 2, 2011: ROTOR. OPEN. ALTERNATOR ROTOR OHM CHECK INFINITE. - [SDR 2010FA0001199](https://openairdocs.org/sdr/2010FA0001199), Nov 24, 2010: CAMSHAFT. SPALLED. DURING CYLINDER REPLACEMENT DUE TO LOW COMPRESSION FOUND NR3 & NR4 INTAKE LOBE ON CAM WORN AND SPALLING. ENGINE REMOVED FOR CAM REPLACEMENT OR ENGINE O/H. SPALL - [SDR 2009FA0000333](https://openairdocs.org/sdr/2009FA0000333), Apr 24, 2009: SUPPORT. ARCED. DURING FLIGHT THE PILOT NOTICED THE INSTRUMENT SUBPANEL LIGHTING FLICKERING. UPON INSP THE WIRE BUNDLE THAT CROSSES OVER THE CENTER SUPPORT FWD OF THE INSTRUMEN - [SDR FTU2004F00005](https://openairdocs.org/sdr/FTU2004F00005), Jul 21, 2004: SEAL. DAMAGED. AC ENGINE WAS DRIPPING OIL. ALL CYLINDERS LOOKED LIKE THEY HAVE BEEN REPLACED RECENTLY. FURTHER INVESTIGATION REVEALED MOST OF PUSH ROD HOUSING SEALS AT CYLINDE - [SDR Q532004F00000](https://openairdocs.org/sdr/Q532004F00000), Jul 1, 2004: CONNECTING ROD. BENT. ROUGH RUNNING ENGINE, PULLED NR 4 CYLINDER FOUND CONNECTING ROD HAD SLIGHT BEND. CAM SHAFT LOBES FORWARD OF CYL 4, WORN OUT. - [SDR AKG2004F00006](https://openairdocs.org/sdr/AKG2004F00006), Mar 15, 2004: NUT. LOOSE. WHILE COMPLETING AN ANNUAL INSPECTION. ONE OF THE CYLINDER RET BASE NUTS FOR THE NR 4 CYLINDER WAS MISSING. NUT WAS FOUND BETWEEN CYLINDER. TORQUE CHECK MADE OF - [SDR PCP2003F00000](https://openairdocs.org/sdr/PCP2003F00000), Jun 23, 2003: CLAMP. DAMAGED. OWNER REPORTED, UNABLE TO ACHIEVE GEAR DOWN AND LOCK ON APPROACH TO LANDING. GEARS WERE MANUALLY EXTENDED IAW POH EMERGENCY GEAR EXTENSION PROCEDURES AND THE AI - [SDR THG2003F00000](https://openairdocs.org/sdr/THG2003F00000), Mar 17, 2003: ROD END. INOPERATIVE. PILOT HEARD LOUD NOISE DURING FLIGHT AS MAIN LANDING GEAR WAS ACCUATED TO UP POSITION, GOT UNSAFE LANDING GEAR WARNING LIGHT. PILOT ASKED FOR ASSISTANCE FROM LO - [SDR 2002FA0000386](https://openairdocs.org/sdr/2002FA0000386), Feb 4, 2002: TURBOCHARGER. LEAKING. TURBOCHARGER LEAKING OIL IN INDUCTION SYSTEM. RECHECKED SYSTEMS AS PER MFG. AND MM. THIS IS NR2 OF SEVERAL ON THIS ENGINE. - [SDR 20010511CW006](https://openairdocs.org/sdr/20010511CW006), Apr 23, 2001: RING. CRACKED. IN COMPLETING ANNUAL INSPECTION, CABIN HEATER ASSEMBLY WAS REMOVED FOR LEAK INSPECTION. FOUND ONE OF MUFF SUPPORT RINGS CRACKED HALF WAY AROUND. IF THIS WOULD H - [SDR 20001120SH028](https://openairdocs.org/sdr/20001120SH028), Nov 10, 2000: BRACKET. BROKEN. TURBO CONTROLLER SUPPORT BRACKET BROKEN AT CASE ATTACHMENT POINT. (X) - [SDR 20001218SH015](https://openairdocs.org/sdr/20001218SH015), Nov 10, 2000: CYLINDER. FAILED. CYLINDER HAD LOW COMPRESSION. (X) - [SDR 20001214SH022](https://openairdocs.org/sdr/20001214SH022), Nov 1, 2000: EXHAUST VALVE. GROOVED. DUE TO LOW COMPRESSION READING, CYLINDER WAS BORESECOPED. EXTREME OVERHEATING OF EXHAUST VALVE WAS NOTED. WEAR GROOVE WAS CUT INTO VALVE FACE BY SEAT. REMOVED C - [SDR 20001012SH030](https://openairdocs.org/sdr/20001012SH030), Sep 4, 2000: TUBE. RUSTED. REMOVED RIGHT ELEVATOR FROM AIRCRAFT TO REPLACE HINGE BEARINGS. CLEANED INSIDE TUBE AND NOTICED 3 RUSTED HOLES THROUGH TUBE. REPLACED TUBE WITH NEW AND LUBED IN - [SDR 98ZZZX4048](https://openairdocs.org/sdr/98ZZZX4048), Sep 15, 1998: MAGNETO. FAILED. LEFT MAG FAILED. RIGHT ENGINE FAILED AT LIFT-OFF. LEFT MAG REMOVED AND DISASSEMBLED. FOUND DISTRIBUTOR BLOCK BUSHING LOOSE IN BLOCK P/N 10-391586. REPLACED BLOC - [SDR 98ZZZX3281](https://openairdocs.org/sdr/98ZZZX3281), Aug 13, 1998: DRIVE SHAFT. SEIZED. ENGINE DRIVEN FUEL PUMP SEIZED AND SHEARED THE DRIVE SHAFT. THE AIRCRAFT MADE A NORMAL LANDING AND ENGINE SHUT DOWN ON THE PARKING RAMP. UPON ENGINE START-UP, T - [SDR 98ZZZX988](https://openairdocs.org/sdr/98ZZZX988), Feb 10, 1998: VALVE SPRING. BROKEN. RIGHT ENGINE RUNNING ROUGH. FOUND 8 OF 12 VALVE SPRINGS BROKEN. REMOVED AND REPLACED ALL VALVE SPRINGS. - [SDR 98ZZZX989](https://openairdocs.org/sdr/98ZZZX989), Feb 10, 1998: VALVE SPRING. BROKEN. RIGHT ENGINE RUNNING ROUGH. FOUND 8 OF 12 VALVE SPRINGS BROKEN. REMOVED AND REPLACED ALL VALVE SPRINGS. - [SDR 98ZZZX1125](https://openairdocs.org/sdr/98ZZZX1125), Feb 1, 1998: LINE. FAILED. FUEL REF LINE FROM FLOW DIVIDER TO BAFFLE BROKE CAUSING A ROUGH RUNNING ENGINE. AIRCRAFT LANDED WITHOUT INCIDENT. - [SDR 97ZZZX4638](https://openairdocs.org/sdr/97ZZZX4638), Oct 16, 1997: TURBOCHARGER. SEAL LEAK. FOUND OIL LEAKING FROM TURBOCHARGER ON COMPRESSOR SIDE AND EXHAUST SIDE OF TURBOCHARGER. SENT IN FOR OVERHAUL AND FOUND EXHAUST TURBINE WHEEL OUT OF BALANCE WHI - [SDR 97ZZZX968](https://openairdocs.org/sdr/97ZZZX968), Jan 15, 1997: LINE. LEAKING. ENGINE WOULD NOT IDLE ON FINAL. PRESSURE CHECKED HOSE AND FOUND SEVERAL LEAKS. (NOT VISIBLE WITH FIRE SLEEVE ON). HOSE DATE 4TH QUARTER '94. A/C AIRWORTHINESS 2 - [SDR 97ZZZX271](https://openairdocs.org/sdr/97ZZZX271), Dec 23, 1996: PLUNGER. FOD MALFUNCTION. MECHANIC NOTICED THAT OIL PRESSURE DROPPED TO ZERO WHEN THROTTLE WAS RETARDED. FOUND 3 PIECES OF SAFETY WIRE STUCK UNDER OIL PRESSURE RELIEF VALVE. REMOVED THE - [SDR 97ZZZX273](https://openairdocs.org/sdr/97ZZZX273), Dec 23, 1996: COVER ASSY. LEAKING. OIL PUMP COVER IMPROPERLY INSTALLED BY OVERHAULER CAUSING A SERIOUS LEAK. RE-SEALED COVER PER TCM O/H MANUAL. FIXED THE PROBLEM. - [SDR 96ZZZX5239](https://openairdocs.org/sdr/96ZZZX5239), Sep 30, 1996: TURBOCHARGER. SEAL FAILED. DURING PRE-OILING OF NEWLY INSTALLED TCM REBUILT ENGINE, OIL LEAKED OUT OF EXHAUST TAILPIPE. FOUND OIL POURING FROM TURBINE SHAFT LIKE SEAL WAS NOT INSTALLED. - [SDR 95ZZZX3678](https://openairdocs.org/sdr/95ZZZX3678), Jun 18, 1995: PUMP. GEAR FAILED. SCAVAGE PUMP DRIVE GEAR FRACTURED IN 4 LOCATIONS FOLLOWING HEAVY WEAR OF TOOTH PROFILE. TOTAL ENGINE FAILURE FOLLOWED. AD 89-24-01R1 AND SB M90-6 PERTAIN TO THI - [SDR 95ZZZX2729](https://openairdocs.org/sdr/95ZZZX2729), May 30, 1995: PAN. CRACKED. HOLE HAD BROKEN OUT IN CENTER OF PAN. PAN IS FORMED FROM .032. NOTIFIED BEECH OF PROBLEM. INSTALLED A NEW PART. BEECH INDICATED THEY MAY USE .061 MATERIAL SOMET - [SDR 95ZZZX2543](https://openairdocs.org/sdr/95ZZZX2543), May 3, 1995: RING. STUCK. ENGINE HAS BEEN RUN WITH MOBIL AV-1 ENGINE OIL. ENGINE STARTED TO BLOW OIL OUT OF BREATHER TUBE. ENGINE DISASSEMBLED AND INSPECTED TO DETERMINE CAUSE. FOUND ALL - [SDR 95ZZZX1148](https://openairdocs.org/sdr/95ZZZX1148), Jan 12, 1995: CYLINDERS. EXCESS WORN. FACTORY NEW CYLINDERS TT 581.4 HOURS. INSTALLED 2-1-91, LOW COMPRESSION ALL CYLINDERS. CYLINDERS ARE WORN BEYOND SERVICEABLE LIMITS AND HAVE SEVERE RING WEAR. R ## STCs that may be installed (OpenAirDocs) (45) 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 SE09908AC](https://openairdocs.org/stc/SE09908AC): Conversion of Continental Motors, Inc. (CMI) model TSIO-520-UB to RAM model IO-550-B-RA engine. RAM Aircraft Limited Partnership - [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 SE09280SC-D](https://openairdocs.org/stc/SE09280SC-D): Modify engine in accordance with RAM Aircraft Corporation Drawing No. 1888. 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 SE3631SW-D](https://openairdocs.org/stc/SE3631SW-D): Cylinder modifications. 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 SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc - [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 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 SE00729WI](https://openairdocs.org/stc/SE00729WI): Modification of the air conditioner compressor support casting to accommodate the installation of B&C Specialty Products Standby alternator P/N BC410-1 on engines with air conditioning. B & C Specialty Products Inc - [STC SE09289SC](https://openairdocs.org/stc/SE09289SC): Installation of modified fuel injector nozzles. General Aviation Modifications, Inc. Lists TSIO-520 Series - [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 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 SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists TSIO-520 Series - [STC SE3653NM](https://openairdocs.org/stc/SE3653NM): Installation of Merlyn Products, Inc. induction air intercooler system. Merlyn Products Inc - [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 - [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists TSIO-520 Series - [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less. Bel-Ray Company, Inc. Lists TSIO-520 Series - [STC SE44GL](https://openairdocs.org/stc/SE44GL): Incorporation of a fuel flow transducer. Shadin Company Inc - [STC SE44WE](https://openairdocs.org/stc/SE44WE): Use of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines. Kling Oil Company. Lists TSIO-520 Series - [STC SE09280SC](https://openairdocs.org/stc/SE09280SC) (historical): Modify engine in accordance with RAM Aircraft Corporation Drawing No. 1888. RAM Aircraft Limited Partnership - [STC SE09282SC](https://openairdocs.org/stc/SE09282SC) (historical): Modify engine in accordance with RAM Aircraft Corporation Drawing Number 1892. RAM Aircraft Limited Partnership --- 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.