# Continental GTSIO-520-M

- Type: Engine model (FAA registry)
- Registry code: 17101
- Manufacturer (registry): CONT MOTOR
- Model: GTSIO-520-M
- Engine type: Reciprocating
- Power: 375 hp
- Data sheet: [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 6 registered aircraft
- Page: https://openairdocs.org/engine/continental-gtsio-520-m

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 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 2008-08-17](https://openairdocs.org/ad/2008-08-17): Turbocharger turbine housing flange and the exhaust tube flange · Teledyne Continental Motors TSIOL-550-A 'Liquid-Cooled' engines (RAM Aircraft Limited Partnership STC SA7633SW or SA7633SW-D). Effective May 6, 2008
- [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 80-25-06 R1](https://openairdocs.org/ad/80-25-06-R1): Engine Oil Pressure · Continental Motors GTSIO-520-L, GTSIO-520-M and GTSIO-520-N. Effective Mar 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 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

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 (6)

- [N12SN](https://openairdocs.org/aircraft/N12SN): [Nechvatal Equipment Leasing LLC](https://openairdocs.org/faa-owner/NECHVATAL%20EQUIPMENT%20LEASING%20LLC), [Grand Blanc, MI](https://openairdocs.org/faa-place/MI/Grand%20Blanc), built 2007, S/N 31-0019
- [N404CR](https://openairdocs.org/aircraft/N404CR): [Tvpx Aircraft Solutions Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20AIRCRAFT%20SOLUTIONS%20INC%20TRUSTEE), [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake), built 1977, S/N 404-0065
- [N475RC](https://openairdocs.org/aircraft/N475RC): [Tvpx Aircraft Solutions Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20AIRCRAFT%20SOLUTIONS%20INC%20TRUSTEE), [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake), built 1978, S/N 4040223
- [N575RC](https://openairdocs.org/aircraft/N575RC): [Richland Aviation Inc](https://openairdocs.org/faa-owner/RICHLAND%20AVIATION%20INC), [Sidney, MT](https://openairdocs.org/faa-place/MT/Sidney), built 1979, S/N 4040431
- [N608RC](https://openairdocs.org/aircraft/N608RC): [Richland Aviation Inc](https://openairdocs.org/faa-owner/RICHLAND%20AVIATION%20INC), [Sidney, MT](https://openairdocs.org/faa-place/MT/Sidney), S/N 404-0608
- [N835RC](https://openairdocs.org/aircraft/N835RC): [Dodson International Parts Inc](https://openairdocs.org/faa-owner/DODSON%20INTERNATIONAL%20PARTS%20INC), [Rantoul, KS](https://openairdocs.org/faa-place/KS/Rantoul), S/N 4040835

## 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.

- [Accident 20111231029949A](https://openairdocs.org/incident/20111231029949A), Dec 31, 2011: Cessna 404 (N835RC), Fort Lauderdale, FL, Substantial damage. Pilot reported, " on ltakeoff got rotation speed, couuld not get airborn, tryed to abort at that time a/c got airborn, and came back up on main gear, bounced…

## Service difficulty reports (157, newest 50)

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

- [SDR HTKA202001080000](https://openairdocs.org/sdr/HTKA202001080000), Nov 14, 2019: ENGINE. FAILED. ENGINE FAILED IN FLIGHT. NUMBER 1 CONNECTING ROD AND (CRANK END) PROTRUDING THROUGH TOP OF ENGINE CASE. RIGHT MAGNETO BROKEN OFF ITS MOUNT. THE ENGINE HAS BEEN 
- [SDR DUFA20190619001](https://openairdocs.org/sdr/DUFA20190619001), Jun 15, 2019: CASE. CRACKED. WHILE ON A ONE MILE FINAL APPROACH, THE RIGHT HAND ENGINE DEVELOPED A SEVERE VIBRATION AND BEGAN TO LOSE POWER. THE AUXILIARY FUEL PUMP WAS SELECTED TO HIGH BUT
- [SDR 2017FA0000152](https://openairdocs.org/sdr/2017FA0000152), Apr 3, 2017: CYLINDER. DAMAGED. AT INSPECTION ALL CYLINDERSS, HAD LOW DIFFERENTIAL PRESSURE CHECK, FOUND GLAZING ON CYLINDERSS AND ALL EXHAUST VALVE GUIDES WERE WORN OUT. REPLACED.
- [SDR DUFA20140506002](https://openairdocs.org/sdr/DUFA20140506002), May 6, 2014: HOSE. DETERIORATED. WHILE IN CRUISE FLIGHT, THE PILOT NOTICED THE LT ENG OIL PRESS DROPPING. ONCE THE OIL PRESS DROPPED BELOW THE GREEN ARC, SHUT DOWN THE LT ENG & CONTACTED CTR. D
- [SDR BGJA201404230001](https://openairdocs.org/sdr/BGJA201404230001), Apr 3, 2014: CLUTCH. FAILED. DURING FLIGHT, THE LT ENGINE ALTERNATOR STOPPED PRODUCING POWER DUE TO THE DRIVE CLUTCH SLIPPING. AFTER LANDING, REMOVED ALTERNATOR AND CHECKED THE DRIVE CLUTCH
- [SDR KY7A20131204001](https://openairdocs.org/sdr/KY7A20131204001), Dec 4, 2013: GASKET. FAILED. PRIOR TO DEPARTURE FROM DEN, THE PILOT REPORTED THAT THE LT PNEUMATIC PUMP WAS INOPERATIVE. MX REPLACED THE PNEUMATIC PUMP & THE ACFT DEPARTED, CRUISING AT FL20
- [SDR KY7A20120727002](https://openairdocs.org/sdr/KY7A20120727002), Jul 26, 2012: OIL SYSTEM. LOW PRESSURE. PILOT REPORTED THAT WHEN CONFIGURING THE ACFT FOR CRUISE FLIGHT THE LT ENGINE MANIFOLD PRESSURE DECREASED. PILOT NOTED THAT THE OIL PRESSURE WAS DECLINING AND S
- [SDR GNB2009F00000](https://openairdocs.org/sdr/GNB2009F00000), May 26, 2009: SLEEVE. CRACKED. AFTER TAKEOFF, PILOT FELT ENGINE RUNNING ROUGH. ACFT RETURNED TO FIELD. MX DISCOVERED NR 2 CYLINDER UPPER DECK NOZZLE TUBE CRACKED. POSSIBLE WEAK WELD OF OUTSID
- [SDR M7JA2009030200001](https://openairdocs.org/sdr/M7JA2009030200001), Sep 13, 2008: ENGINE. MALFUNCTIONED. IN CRUISE FLIGHT THE CAPTAIN NOTICE A DROP IN THE RT ENGINE OIL PRESSURE WITH INCREASE IN OIL TEMP. THERE WAS NOT VIBRATION OR VISIBLE OIL LEAKS ON THE MENTION 
- [SDR DUFA041007001](https://openairdocs.org/sdr/DUFA041007001), Apr 10, 2007: STUD. SHEARED. WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM TH
- [SDR DUFA20070002](https://openairdocs.org/sdr/DUFA20070002), Apr 10, 2007: STUD. SHEARED. WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RIGHT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM
- [SDR 2007FA0000226](https://openairdocs.org/sdr/2007FA0000226), Feb 20, 2007: ENGINE. FAILED. THIS ENGINE FAILED TO THE TERMINOLOGY OF CATASTROPHIC AT THE NR 1 AND NR 2 CYLINDER CONNECTING ROD LOCATIONS DURING A MAINTENANCE TEST FLIGHT WITHIN TEN MINUTES
- [SDR BAC005](https://openairdocs.org/sdr/BAC005), Aug 2, 2006: TUBE. DISCONNECTED. PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS SEL
- [SDR BAC001](https://openairdocs.org/sdr/BAC001), Aug 2, 2006: LINE. DISCONNECTED. PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LEFT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS S
- [SDR BGJ2006F00000](https://openairdocs.org/sdr/BGJ2006F00000), Jan 6, 2006: CYLINDER. CRACKED. THE AIRCRAFT WAS IN CRUISE POWER CONFIGURATION. NR 5 CYLINDER BARREL ON RT ENGINE CRACKED AND SEPARATED APPROXIMATELY 3 INCHES FROM MOUNTING BASE IN THE BARREL 
- [SDR AU510001447](https://openairdocs.org/sdr/AU510001447), Dec 12, 2005: BOLT. BROKEN. (AUS) ENGINE INTERNAL DAMAGE. SUSPECT CAUSED BY FAILURE OF NR 5 CONNECTING ROD BOLT OR CONNECTING ROD. INVESTIGATION CONTINUING.
- [SDR AU510001489](https://openairdocs.org/sdr/AU510001489), Dec 12, 2005: BEARING. FAILED. (AUS) ENGINE METAL CONTAMINATION. WORKSHOP STRIP AND INVESTIGATION FOUND NR 2 AND NR 3 MAIN BEARINGS FAILED. BEARING SHELLS BROKE UP CAUSING DAMAGE TO CRANKCASE
- [SDR AU510001530](https://openairdocs.org/sdr/AU510001530), Dec 12, 2005: UPLOCK SWITCH. FAILED. LT MAIN LANDING GEAR UPLOCK MICROSWITCH FAULTY.
- [SDR AU510001619](https://openairdocs.org/sdr/AU510001619), Dec 12, 2005: HEATER. FAULTY. (AUS) CABIN HEATER FAULTY. SMOKE IN CABIN. INVESTIGATION FOUND THE FORWARD VENT BLOWER INOPERATIVE DUE MOTOR BRUSH HANGUP. INSPECTION OF THE HEATER FOUND DISCOL
- [SDR AU510001695](https://openairdocs.org/sdr/AU510001695), Dec 12, 2005: BEARING. DAMAGED. ENGINE METAL CONTAMINATION. BULK STRIP FOUND THAT THE TWO REARMOST MAIN BEARINGS WERE DAMAGED. INSPECTION OF THE CRANKSHAFT IN THE VICINITY OF THE TWO REARMOST 
- [SDR AU510001730](https://openairdocs.org/sdr/AU510001730), Dec 12, 2005: BEARING. COLLAPSED. RT ENG DRIVEN ALT FAILED. ALT DRIVE COUPLING SHEARED AND ALT FRONT BEARING COLLAPSED. RED ELASTOMER MAT`L FROM ALT DRIVE COUPLING AND MINOR METALLIC PARTICLES V
- [SDR AU510001799](https://openairdocs.org/sdr/AU510001799), Dec 12, 2005: SWITCH. UNSERVICEABLE. (AUS) RT MAIN LANDING GEAR UPLOCK MICROSWITCH FAILED. SWITCH HAD ONLY 54.5 HOURS OPERATION SINCE REPLACEMENT. (CASA NR 510001799)
- [SDR AU510001816](https://openairdocs.org/sdr/AU510001816), Dec 12, 2005: STUD. BROKEN. RT ENGINE NR 5 CYLINDER HOLD-DOWN STUDS (2OFF) BROKEN OFF FLUSH WITH THE CYLINDER BASE.
- [SDR AU510001970](https://openairdocs.org/sdr/AU510001970), Dec 12, 2005: HUB. CORRODED. PROPELLER HUB CORRODED BEYOND LIMITS IN BLADE SOCKET AREA.
- [SDR AU510002176](https://openairdocs.org/sdr/AU510002176), Dec 12, 2005: CONNECTOR. FAULTY. (AUS) RT MAIN LANDING GEAR DOWN MICROSWITCH WIRE CONNECTOR FAULTY. SUSPECT CONNECTOR WAS NOT AN APPROVED ITEM. (OTHER CAUSE: MAINTENANCE CONTROL ISSUE ) (CASA N
- [SDR AU510001529](https://openairdocs.org/sdr/AU510001529), Sep 6, 2005: UPLOCK SWITCH. DAMAGED. LT MAIN LANDING GEAR MICROSWITCH DAMAGED INTERNALLY.
- [SDR AU510002082](https://openairdocs.org/sdr/AU510002082), Aug 11, 2005: CIRCUIT CARD. FAILED. GPS DATA CARD FAILED.
- [SDR AU510001856](https://openairdocs.org/sdr/AU510001856), Mar 6, 2005: SWITCH. FAILED. LT ENGINE STARTER SWITCH FAILED. SWITCH REMAINED ENGAGED.
- [SDR 2004F00429](https://openairdocs.org/sdr/2004F00429), Nov 29, 2004: SENSOR. BURNED OUT. WHILE IN CRUISE FLIGHT, THE PILOT NOTICED SPARKS COMING FROM THE LEFT ENGINE FORWARD COWL AREA. AS A PRECAUTION, THE ENGINE WAS SHUTDOWN AND SECURED. THE AIRCRA
- [SDR AUS20040507](https://openairdocs.org/sdr/AUS20040507), Jun 2, 2004: BEARING. FAILED. (AUS) LT ENGINE PROPELLER GOVERNOR FAULTY. INVESTIGATION FOUND OIL PUMP GEAR PN A20107 WORN, PIVOT PIN PN A20026 EXTREMELY WORN AND BEARING PN A20028 DESTROYED.
- [SDR AUS20040221](https://openairdocs.org/sdr/AUS20040221), Mar 24, 2004: LATCH. FAILED. (AUS) PROPELLER EXPERIENCED UNCOMMANDED FEATHER FOLLOWING GROUND RUN. SUSPECT CAUSED BY FAILURE OF THE LOW PITCH STOP LATCH PINS.
- [SDR AUS20031275](https://openairdocs.org/sdr/AUS20031275), Dec 11, 2003: VALVE. CONTAMINATED. (AUS) HYDRAULIC SYSTEM UNLOADING VALVE CONTAINED DEBRIS UNDER THE VALVE SEAT CAUSING THE VALVE TO REMAIN PARTIALLY OPEN AND PREVENTING THE CORRECT HYDRAULIC PRE
- [SDR AUS20031108](https://openairdocs.org/sdr/AUS20031108), Oct 31, 2003: SWITCH. FAULTY. (AUS) NOSE LANDING GEAR DOWN SWITCH FAULTY.
- [SDR AUS20030977](https://openairdocs.org/sdr/AUS20030977), Sep 18, 2003: PUMP. FAILED. (AUS) LT AND RT AUXILIARY FUEL BOOST PUMP PRESSURES BELOW REQUIRED LIMITS. ONE OF THE REPLACEMENT PUMPS ALSO HAD LOW FUEL PRESSURE.
- [SDR AUS20031029](https://openairdocs.org/sdr/AUS20031029), Sep 16, 2003: BRACKET. CRACKED. (AUS) ALTERNATOR CAPACITOR BRACKET FAILED ALLOWING CAPACITOR TO SHORT CIRCUIT ON POSITIVE PLATE.
- [SDR AUS20030879](https://openairdocs.org/sdr/AUS20030879), Aug 15, 2003: REGULATOR. FOD. (AUS) LT ENGINE OIL PRESSURE REGULATOR CONTAMINATED WITH FOD BETWEEN PLUNGER AND SEAT. LOSS OF ENGINE OIL PRESSURE.
- [SDR AUS20030789](https://openairdocs.org/sdr/AUS20030789), Jul 31, 2003: CYLINDER. CRACKED. (AUS) ENGINE CYLINDER CRACKED.
- [SDR AUS20030718](https://openairdocs.org/sdr/AUS20030718), Jul 16, 2003: GEAR. FAILED. (AUS) STARTER ADAPTER DRIVESHAFT GEAR TEETH STRIPPED.
- [SDR AUS20030703](https://openairdocs.org/sdr/AUS20030703), Jul 1, 2003: CONNECTING ROD. CRACKED. (AUS) CONNECTING ROD CONTAINED A CRACK INDICATION ON THE SHANK BELOW THE LITTLE END.
- [SDR AUS20030720](https://openairdocs.org/sdr/AUS20030720), Jun 10, 2003: FLANGE. BROKEN. (AUS) MAGNETO FLANGE BROKEN. SUSPECT CAUSED BY OVERTENSIONING OF HOLD DOWN NUTS. PERSONNEL/MAINTENANCE ERROR.
- [SDR AUS20030488](https://openairdocs.org/sdr/AUS20030488), Apr 24, 2003: BRACKET. CRACKED. (AUS) ALTERNATOR CAPACITOR RETAINING BRACKET FAILED. CAPACITOR SHORTCIRCUITING ON POSITIVE PLATE.
- [SDR CA021210005](https://openairdocs.org/sdr/CA021210005), Dec 6, 2002: BRACKET. CRACKED. (CAN) CRACKED BRACKET FOR NOSE GEAR ACTUATOR. AFT END ATTACHES AT THIS BRACKET.
- [SDR CA021210006](https://openairdocs.org/sdr/CA021210006), Dec 6, 2002: STRUCTURE. CRACKED. (CAN) NOSE GEAR STRUCTURE WAS CRACKED AT ALL MOUNTING POINTS. SUSPECT UNREPORTED HARD LANDING.
- [SDR CA021210008](https://openairdocs.org/sdr/CA021210008), Dec 6, 2002: GEAR. CORRODED. (CAN) GEAR TEETH FOUND CORRODED ON ALTERNATOR DRIVE HUB. CORRESPONDING DRIVE RING INSIDE ENGINE CHECKED OK.
- [SDR AUS20021208](https://openairdocs.org/sdr/AUS20021208), Oct 17, 2002: LINE. CORRODED. (AUS) OXYGEN INTERCONNECT LINES CORRODED FROM THE INSIDE OUT.
- [SDR AUS20021165](https://openairdocs.org/sdr/AUS20021165), Oct 7, 2002: BEARING. BROKEN. (AUS) NO2 MAIN BEARING BROKEN. REMAINING MAIN BEARINGS MOVING SIDEWAYSCAUSING TANGS TO WEAR INTO CASE.
- [SDR AUS20021179](https://openairdocs.org/sdr/AUS20021179), Sep 14, 2002: UPLOCK SWITCH. FAILED. (AUS) RT MAIN LANDING GEAR UPLOCK SWITCH FAILED.
- [SDR AUS20021144](https://openairdocs.org/sdr/AUS20021144), Sep 10, 2002: PISTON. DAMAGED. (AUS) LH ENGINE NO2 CYLINDER PISTON DAMAGED. SUSPECT CAUSED BYDETONATION.
- [SDR AUS20020885](https://openairdocs.org/sdr/AUS20020885), Aug 2, 2002: VALVE SPRING. BROKEN. (AUS) NO6 CYLINDER INNER EXHAUST VALVE SPRING BROKEN. METAL CONTAMINATION OF OIL SYSTEM.
- [SDR AUS20020911](https://openairdocs.org/sdr/AUS20020911), Jul 20, 2002: STUD. SHEARED. (AUS) CYLINDER ROCKER SHAFT BOLTS LOOSE. ONE STUD FRACTURED WITHSUBSEQUENT DAMAGE TO THE INLET VALVE PUSHROD AND TUBE.

All 157: https://openairdocs.org/engine/continental-gtsio-520-m/reports.md

## STCs that may be installed (OpenAirDocs) (21)

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 SE3767SW-D](https://openairdocs.org/stc/SE3767SW-D): Installation of induction hose clamps. RAM Aircraft Limited Partnership
- [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE3767SW](https://openairdocs.org/stc/SE3767SW): Installation of induction hose clamps. 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 SE00577NY](https://openairdocs.org/stc/SE00577NY): Installation of Canadian Aero Mfg. (C.A.M.) Oil Coolers. Canadian Aero Manufacturing
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [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 SE1447SO](https://openairdocs.org/stc/SE1447SO): Installation of GTSIO-520-C induction system, fuel injection system, oil cooler, oil filter, turbo- charger, exhaust system and related parts, and derate the power and per- formance to the GTSIO-520-C power. South Florida Aircraft Sales & Leasing, Inc

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