# Continental GTSIO-520-D - Type: Engine model (FAA registry) - Registry code: 17096 - Manufacturer (registry): CONT MOTOR - Model: GTSIO-520-D - Engine type: Reciprocating - Power: 375 hp - Data sheet: [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 2 registered aircraft - Page: https://openairdocs.org/engine/continental-gtsio-520-d 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 2023-05-16](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 2020-16-11](https://openairdocs.org/ad/2020-16-11): SUMMARY: Reciprocating Cylinder Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 23 more. Effective Sep 21, 2020 - [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 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 2011-13-03](https://openairdocs.org/ad/2011-13-03): Turbocharger Turbine · Lycoming Engines LTO-360-E1A6D, O-540-L3C5D, TIGO-541-E1A and 20 more. Effective Jul 13, 2011 - [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 2007-05-15](https://openairdocs.org/ad/2007-05-15): Starter adapter assembly · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 6 more. Effective Apr 16, 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 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 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 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993 - [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991 - [AD 88-03-06](https://openairdocs.org/ad/88-03-06): Oil Filter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 155 more. Effective Apr 15, 1988 - [AD 86-13-04 R3](https://openairdocs.org/ad/86-13-04-R3): Cylinder Assemblies · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 44 more. Effective Feb 24, 1988 - [AD 81-24-06](https://openairdocs.org/ad/81-24-06): Engine Driven Fuel Pumps · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 51 more. Effective Nov 23, 1981 - [AD 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 75-09-13](https://openairdocs.org/ad/75-09-13): Turbocharger Oil Inlet Adapter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 9 more. Effective Apr 24, 1975 - [AD 80-09-11](https://openairdocs.org/ad/80-09-11): Starter Torsional Damper/Starter Gear Shaft · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 6 more - [AD 77-13-22](https://openairdocs.org/ad/77-13-22): Crankcase Cracks · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 22 more Historical (superseded or no longer in force): - [AD 2023-04-08](https://openairdocs.org/ad/2023-04-08) (historical): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 141 more. Effective Feb 23, 2023 - [AD 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 2005-20-04](https://openairdocs.org/ad/2005-20-04) (historical): Starter adapter assembly · Teledyne Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 6 more. Effective Nov 1, 2005 - [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 ## Information bulletins (advisory) (6) - [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT Alternator Drive Coupling. Issued Jun 20, 2018 - [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-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009 ## Registered aircraft (2) - [N269F](https://openairdocs.org/aircraft/N269F): [Air2615 LLC](https://openairdocs.org/faa-owner/AIR2615%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1968, S/N 421-0177 - [N421RR](https://openairdocs.org/aircraft/N421RR): [Blue Star Aviation LLC](https://openairdocs.org/faa-owner/BLUE%20STAR%20AVIATION%20LLC), [Billings, MT](https://openairdocs.org/faa-place/MT/Billings), built 1968, S/N 4210085 ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports (1) 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 20170825017379I](https://openairdocs.org/incident/20170825017379I), Aug 25, 2017: Cessna 421 (N269F), Manchester, NH, Minor damage. This office notifed 8/25/2017 that N269F, C421, declared an emegency due to one engine out. Aircraft landed kmht, runway 6 without incident, exited and was… ## Service difficulty reports (17) As reported by operators and repair stations, by the model named in the report. - [SDR EMWC2012F00070](https://openairdocs.org/sdr/EMWC2012F00070), Nov 26, 2011: CABLE. DAMAGED. DURING CRUISE FLIGHT, AFT SKI CABLE ATTACH CLEVIS PIN CAME LOOSE. CLEVIS PIN AND DIAPER PIN HOLDING CLEVIS DEPARTED ACFT. AFT SKI CABLE CAME LOOSE AND SKI FLIPP - [SDR CA110804002](https://openairdocs.org/sdr/CA110804002), Jul 29, 2011: PIN. CRACKED. PROPELLER INSTALLED AS NEW ON AUG.8,2003. UPON ENGINE SHUTDOWN THE PROPELLER WOULD NOT LATCH AND TRAVELLED TO THE FULL FEATHER POSITION. WHEN THE CYLINDER WAS R - [SDR CA090209001](https://openairdocs.org/sdr/CA090209001), Jan 23, 2009: ATTACH BOLT. CRACKED. THIS BOLT WAS INSPECTED DURING THE ANNUAL INSPECTION OF THIS AIRCRAFT. IT WAS VISUALLY SEEN TO HAVE WHAT LOOKED LIKE A CRACK ON THE HEAD SURFACE OF THE BOLT. TH - [SDR 2005FA0001451](https://openairdocs.org/sdr/2005FA0001451), Oct 21, 2005: ENGINE. MAKING METAL. AT INITIAL 10 HR OIL CHANGE, A LARGE AMOUNT OF WHAT APPEARS TO BE BEARING MATERIAL WAS FOUND IN THE DRAIN OIL, DRAIN PLUG, AND ON FURTHER EXAMINATION, THE OIL F - [SDR 2004FA0000914](https://openairdocs.org/sdr/2004FA0000914), Oct 22, 2004: ROCKER. BROKEN. ANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM - [SDR 2004FA0000915](https://openairdocs.org/sdr/2004FA0000915), Oct 22, 2004: EXHAUST ROCKER. BROKEN. ANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM - [SDR CA040105004](https://openairdocs.org/sdr/CA040105004), Dec 16, 2003: STRUT. CRACKED. (CAN) LT MAIN LANDING GEAR COLLAPSED UPON TOUCH-DOWN WITH ALL 3 GREEN LIGHTS ON. FOUND DOWN LOCK ARM BROKEN AWAY FROM LUG ON TOP END OF STRUT. LOCK ARM NORMALLY - [SDR CA030116003](https://openairdocs.org/sdr/CA030116003), Jan 13, 2003: SHAFT. BROKEN. (CAN) ON DEPARTURE, ENGINE START RT ENGINE NO ROTATION. PILOT CALL MAINTENANCE. MAINTENANCE FOUND THAT STARTER CLUTCH WAS LOOSE. DISMANTLE, FOUND BAD GEAR ON SH - [SDR CA030210003](https://openairdocs.org/sdr/CA030210003), Jan 13, 2003: WINDSHIELD. FAILED. (CAN) WHILE CLIMBING TO FL190, AT APPROXIMATELY FL180 THE COPILOTS WINDSCREEN DEPARTED THE AIRCRAFT RESULTING IN INSTANTANEOUS DECOMPRESSION. OTHER COCKPIT ITEM - [SDR 2000ZZZX625](https://openairdocs.org/sdr/2000ZZZX625), Mar 14, 2000: MANIFOLD. CRACKED. DURING ANNUAL INSPECTION, A CRACK EXTENDING ABOUT 2 INCHES EACH SIDE OF THE THREADED BOSS. THE BOSS HAD BEEN DRILLED AND TAPPED FOR A HELICOIL. THREADED BOSS IS - [SDR 98ZZZX4571](https://openairdocs.org/sdr/98ZZZX4571), Nov 15, 1998: SHAFT GEAR. BROKEN. GEARS ON SHAFT GEAR BROKEN OFF WHICH CAUSED SHAFT GEAR TO DAMAGE CASE WHERE PILOT BEARING GOES. - [SDR 98ZZZX446](https://openairdocs.org/sdr/98ZZZX446), Jan 16, 1998: GASKET. FAILED. ON TAKEOFF, PILOT NOTICED OIL ON RT COWLING. ACFT RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND AN900-28 GASKET AT OIL SCREEN COVER ADAPTER LEAKING. G - [SDR 96ZZZX4953](https://openairdocs.org/sdr/96ZZZX4953), Jun 10, 1996: ADAPTER. FAILED. DURING SCHEDULED OIL CHANGE, A LARGE QUANTITY OF FERROUS PARTICLES WERE FOUND IN OIL FILTER AND ON DRAIN PLUG. INVESTIGATION REVEALED BEARING FAILURE OF STARTER - [SDR 96ZZZX798](https://openairdocs.org/sdr/96ZZZX798), Jan 26, 1996: QUILL SHAFT. FAILED. LEFT ENGINE QUIT ON CLIMB-OUT. PROP FEATHERED AIRCRAFT, MADE SAFE LANDING. FOUND HOLE IN CASE UNDER INTERCOOLER FROM FAILED CONNECTING ROD. PROP TURNS FREELY. E - [SDR 96ZZZX178](https://openairdocs.org/sdr/96ZZZX178), Nov 30, 1995: SHAFT TOOTH. BROKEN. PILOT REPORTED LOWER OIL PRESSURE, RT ENGINE. TROUBLESHOT TO BROKEN TOOTH ON STARTER ADAPTER SHAFT AND FAILED BEARING IN CRANKCASE. BEARING SUPPORT WAS OVERSIZE - [SDR 96ZZZX179](https://openairdocs.org/sdr/96ZZZX179), Nov 30, 1995: BEARING. FAILED. PILOT REPORTED LOWER OIL PRESSURE, RT ENGINE. TROUBLESHOT TO BROKEN TOOTH ON STARTER ADAPTER SHAFT AND FAILED BEARING IN CRANKCASE. BEARING SUPPORT WAS OVERSIZE - [SDR 95ZZZX5928](https://openairdocs.org/sdr/95ZZZX5928), Jun 16, 1995: SHAFT. SHEARED. AIRCRAFT ARRIVED AT FBO WITH RIGHT ALTERNATOR PROBLEM. REPAIRED RIGHT ALTERNATOR. WHEN AIRCRAFT START ATTEMPTED, LEFT STARTER FOUND TO HAVE SHEARED THROUGH-BOLT ## STCs that may be installed (OpenAirDocs) (27) 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 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 SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc - [STC SE2340SW](https://openairdocs.org/stc/SE2340SW): Installation of modified cylinder assemblies, barrels, piston, and repaired crankcases. Continental Motors, Inc - [STC SE34WE](https://openairdocs.org/stc/SE34WE): Installation of Electro-Coatings, Inc., piston rings on Continental pistons. Continental Motors, Inc - [STC SE5820SW](https://openairdocs.org/stc/SE5820SW): Installation of Airmotive exhaust valve, P/N AEC-637781. Continental Motors, Inc. Lists GTSIO-520 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists GTSIO-520 Series - [STC SE3330NM](https://openairdocs.org/stc/SE3330NM): Continental valve cover gasket. Real Gaskets Tennessee - [STC SE00754DE](https://openairdocs.org/stc/SE00754DE): Installation of an auxiliary oil sump port on the oil sump pan. Oilamatic, Inc - [STC SE5726SW-D](https://openairdocs.org/stc/SE5726SW-D): Installation of Floscan - 20lb or - 203b fuel flow transducers. RAM Aircraft Limited Partnership - [STC SE3767SW-D](https://openairdocs.org/stc/SE3767SW-D): Installation of induction hose clamps. RAM Aircraft Limited Partnership - [STC SE612GL](https://openairdocs.org/stc/SE612GL): Installation of a Shadin Company fuel flow transducer. Shadin Avionics - [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc - [STC SE5726SW](https://openairdocs.org/stc/SE5726SW): Installation of Floscan -201b or -203b fuel flow transducers. RAM Aircraft Limited Partnership - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE09963SC](https://openairdocs.org/stc/SE09963SC): Installation of modified fuel injector nozzles. General Aviation Modifications, Inc - [STC SE3767SW](https://openairdocs.org/stc/SE3767SW): Installation of induction hose clamps. RAM Aircraft Limited Partnership - [STC SE4591SW](https://openairdocs.org/stc/SE4591SW): Installation of RAM magneto pressurization system. RAM Aircraft Limited Partnership - [STC SE8338SW](https://openairdocs.org/stc/SE8338SW): Install locknuts on cylinder attachment studs and thru-bolts, and install 6 additional cylinder attachment studs onto engine crankcases. RAM Aircraft Limited Partnership. Lists GTSIO-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 GTSIO-520 Series - [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation - [STC SE09058SC](https://openairdocs.org/stc/SE09058SC): Remove cylinder assembly, fuel nozzles, induction tubes, and injector air reference system and add corresponding parts from GTSIO-520-L engine. Texas Skyways Inc - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists GTSIO-520 Series - [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 GTSIO-520 Series - [STC SE74WE](https://openairdocs.org/stc/SE74WE): BG-341 spark plug as eligible for installation on listed Continental engines. Lewis Leibee - [STC SE12GL](https://openairdocs.org/stc/SE12GL): Installation of oil filler cap. Ray Whyte Electric Products Co --- 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.