# Continental GTSIO-520-L

- Type: Engine model (FAA registry)
- Registry code: 17100
- Manufacturer (registry): CONT MOTOR
- Model: GTSIO-520-L
- Engine type: Reciprocating
- Power: 375 hp
- Data sheet: [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 16 registered aircraft
- Page: https://openairdocs.org/engine/continental-gtsio-520-l

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) (5)

- [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

## Registered aircraft (16)

- [N241EW](https://openairdocs.org/aircraft/N241EW): [Fort Carlos LLC](https://openairdocs.org/faa-owner/FORT%20CARLOS%20LLC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 1978, S/N 421C-0496
- [N262MC](https://openairdocs.org/aircraft/N262MC): [Aerospace Trust Management LLC Trustee](https://openairdocs.org/faa-owner/AEROSPACE%20TRUST%20MANAGEMENT%20LLC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), S/N 421C0140
- [N274MB](https://openairdocs.org/aircraft/N274MB): [Adams Aviation Services Inc Trustee](https://openairdocs.org/faa-owner/ADAMS%20AVIATION%20SERVICES%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1977, S/N 421C0315
- [N28WD](https://openairdocs.org/aircraft/N28WD): [Optio Air LLC](https://openairdocs.org/faa-owner/OPTIO%20AIR%20LLC), [Moore, OK](https://openairdocs.org/faa-place/OK/Moore), S/N 421C0715
- [N421BR](https://openairdocs.org/aircraft/N421BR): [Control Data Inc](https://openairdocs.org/faa-owner/CONTROL%20DATA%20INC), [Melbourne Beach, FL](https://openairdocs.org/faa-place/FL/Melbourne%20Beach), built 1976, S/N 421C0128
- [N421JL](https://openairdocs.org/aircraft/N421JL): [Wagner Distributing Co Inc](https://openairdocs.org/faa-owner/WAGNER%20DISTRIBUTING%20CO%20INC), [Auburn, CA](https://openairdocs.org/faa-place/CA/Auburn), built 1977, S/N 421C0210
- [N421JR](https://openairdocs.org/aircraft/N421JR): [421jr LLC](https://openairdocs.org/faa-owner/421JR%20LLC), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 1976, S/N 421C-0094
- [N421MU](https://openairdocs.org/aircraft/N421MU): [N421mu LLC](https://openairdocs.org/faa-owner/N421MU%20LLC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), built 1977, S/N 421C0248
- [N421TC](https://openairdocs.org/aircraft/N421TC): [Athar Glenola LLC](https://openairdocs.org/faa-owner/ATHAR%20GLENOLA%20LLC), [Mars, PA](https://openairdocs.org/faa-place/PA/Mars), built 1980, S/N 421C0879
- [N421XL](https://openairdocs.org/aircraft/N421XL): [Locaero Services Inc Trustee](https://openairdocs.org/faa-owner/LOCAERO%20SERVICES%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1979, S/N 421C0803
- [N42HM](https://openairdocs.org/aircraft/N42HM): [Sky West Aviation Inc Trustee](https://openairdocs.org/faa-owner/SKY%20WEST%20AVIATION%20INC%20TRUSTEE), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque), built 1979, S/N 421C0683
- [N47JD](https://openairdocs.org/aircraft/N47JD): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1980, S/N 421C0805
- [N61AJ](https://openairdocs.org/aircraft/N61AJ): [Coco Air Ltd Trustee](https://openairdocs.org/faa-owner/COCO%20AIR%20LTD%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1978, S/N 421C0457
- [N8401A](https://openairdocs.org/aircraft/N8401A): [Commercial Property Services Group LLC](https://openairdocs.org/faa-owner/COMMERCIAL%20PROPERTY%20SERVICES%20GROUP%20LLC), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 1977, S/N 421C0443
- [N844CK](https://openairdocs.org/aircraft/N844CK): [Turpin Time LLC](https://openairdocs.org/faa-owner/TURPIN%20TIME%20LLC), [Helena, MT](https://openairdocs.org/faa-place/MT/Helena), built 1979, S/N 421C0706
- [N87PP](https://openairdocs.org/aircraft/N87PP): [Aerospace Trust Management LLC Trustee](https://openairdocs.org/faa-owner/AEROSPACE%20TRUST%20MANAGEMENT%20LLC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1976, S/N 421C0206

## NTSB investigations (1)

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 CEN17FA167](https://openairdocs.org/ntsb/CEN17FA167), Apr 25, 2017: Cessna 421C (N421TK), Huntsville, TX, destroyed, 1 fatal. Probable cause: The pilot's failure to identify the alternate runway, to perform a timely precautionary landing, and to maintain airplane control. Contributing to the accident was the failure of the left engine due…

## 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 20170425003719A](https://openairdocs.org/incident/20170425003719A), Apr 25, 2017: Cessna 421C (N421TK), Huntsville, TX, Destroyed, 1 fatal. Aircraft crashed short of runway after shutting down left engine. The aircraft hit the tops of some trees which ripped off right wing and caught the aircraft…

## Service difficulty reports (139, newest 50)

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

- [SDR 2024FA0000146](https://openairdocs.org/sdr/2024FA0000146), Dec 8, 2023: PROPELLER. OVERSPEED. RIGHT PROP GOVERNOR FAILED APPROACHING LEVEL OFF FROM CLIMB. ENGINE SPIKED TO OVER 6,000 RPM, ENGINE RUINED, BROUGHT PROP CONTROL BACK TO NO AVAIL. THROTTLE BAC
- [SDR 2023FA0000268](https://openairdocs.org/sdr/2023FA0000268), May 18, 2023: CYLINDER. SPLIT. AN OCCURRENCE WAS REPORTED THAT HAPPENED AT RALEIGH AIRPORT (RDU), ON THE 05/09/2023 AT 1715 EDT. THE SAID AIRCRAFT, N382BW HAD JUST GOTTEN AIRBORNE AND RECEIVE
- [SDR 2023F00043](https://openairdocs.org/sdr/2023F00043), Jan 26, 2023: CYLINDER. SEIZED. WHILE IN CRUISE FLIGHT AT 19,000 FT, PILOT NOTICED THE RIGHT ENGINE SURGING. HE SUSPECTED IT WAS A FAILED FUEL PUMP AND WHILE ATTEMPTING TO REMEDY THE SITUATION
- [SDR 2020FA0000524](https://openairdocs.org/sdr/2020FA0000524), Nov 25, 2020: GEAR. DISCONNECTED. PILOT NOTED THAT RIGHT ALTERNATOR FAILED IN FLIGHT. POST FLIGHT INSPECTION FOUND ENGINE GEAR, ALTERNATOR DRIVE, RETAINING BOLTS WERE NOT INSTALLED AND TWO WERE 
- [SDR 6DFA2019042319001](https://openairdocs.org/sdr/6DFA2019042319001), Apr 19, 2019: HEATER. ODOR. SMOKE IN CABIN DURING CRUISE. PIC TURNED ON HEATER AND FAN SWITCHES. NO HEAT, BUT FAINT BURNING SMELL. PIC LOOKED BACK SAW SMOKE AND SECURED HEATER.
- [SDR 2018FA0000484](https://openairdocs.org/sdr/2018FA0000484), Nov 16, 2018: CONNECTOR. UNSECURE. LEFT ENGINE TACHOMETER GENERATOR CANNONPLUG VIBRATED LOOSE DUE TO NOT BEING SAFETIED AND FROM VIBRATION OF ENGINE. CANNON PLUG REATTACHED AND SAFETIED. GROUND R
- [SDR 1TLR20180425001](https://openairdocs.org/sdr/1TLR20180425001), Apr 25, 2018: THROTTLE BODY. LEAKING. DURING ANNUAL INSPECTION ENGINE RUNS, NOTICED FUEL LEAK EMINATING FROM THROTTLE BODY FUEL CONTROL SHAFT. LOCATION OF THE FUEL LEAK IS RIGHT ABOVE EXHAUST MANIFO
- [SDR 2017FA0000615](https://openairdocs.org/sdr/2017FA0000615), Dec 1, 2017: CASE. CRACKED. ENGINE CASE HAS A THREE INCH CRACK BETWEEN THE NR 1 AND 3 CYLINDERS.
- [SDR 2017FA0000517](https://openairdocs.org/sdr/2017FA0000517), Oct 18, 2017: DRIVE SHAFT. SHEARED. PILOT REPORTED ON APPROACH TO LANDING, A MOMENTARY RIGHT ENGINE POWER FLUCTUATION, FOLLOWED BY RIGHT ALTERNATOR FAILURE, LANDED WITHOUT INCIDENT. POST FLIGHT MA
- [SDR 2017FA0000364](https://openairdocs.org/sdr/2017FA0000364), Mar 17, 2017: LIFTER. SPALLED. BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT.
- [SDR TO3R20170214001](https://openairdocs.org/sdr/TO3R20170214001), Feb 14, 2017: AIR FILTER. SEPARATED. OUR CUSTOMER REPORTED UNEVEN IDLE AND ERRATIC EGTS ON ALL CYLINDERS. AFTER TROUBLESHOOTING WE FOUND THAT ONE OF THE FILTERS WE REPLACED AT THE AIRCRAFTS LAST AN
- [SDR 2016FA0000278](https://openairdocs.org/sdr/2016FA0000278), Jun 7, 2016: CYLINDER HEAD. CRACKED. PILOT WAS IN CRUISE AND THE RT ENGINE STARTED TO VIBRATE. AN ALTERNATE AIRPORT WAS SELECTED AND ENROUTE THE ENGINE STARTED TO LOOSE POWER. MAINTENANCE PERSONNEL
- [SDR 2016FA0000085](https://openairdocs.org/sdr/2016FA0000085), Jan 4, 2016: TUBE. LEAKING. PILOT NOTED AN OIL LEAK ON THE LEFT ENGINE WHILE IN CRUISE FLIGHT AND REDUCED POWER WITH AN UNEVENTFUL LANDING PERFORMED. MAINTENANCE INSPECTED THE AIRCRAFT AND
- [SDR 2015FA0000480](https://openairdocs.org/sdr/2015FA0000480), Oct 6, 2015: ENGINE. POWER LOSS. LOSS OF POWER DURING CRUISE WITH A SUBSEQUENT UNSCHEDULED LANDING.
- [SDR NF2R201812210003](https://openairdocs.org/sdr/NF2R201812210003), Sep 4, 2015: LIFTER. GALLED. THE LEFT ENGINE LIFTER ARE PITTED.
- [SDR YN8R201504280001](https://openairdocs.org/sdr/YN8R201504280001), Apr 21, 2015: BEARING. WORN. PILOT REPORTED NORMAL MAG DROP PRIOR TO DEPARTURE. IN CRUISE FLIGHT, PILOT FELT A SHUDDER IN THE AIRCRAFT AND LOST SOME POWER IN THE LEFT ENGINE. THIS WAS HIS D
- [SDR 2014FA0000701](https://openairdocs.org/sdr/2014FA0000701), Nov 20, 2014: CRANKSHAFT. BROKEN. CRANKSHAFT BROKEN AT NR 3 MAIN JOURNAL. POSSIBLE INTERNAL FLAW AT MANUFACTURING.
- [SDR FAA20140131000002](https://openairdocs.org/sdr/FAA20140131000002), Jan 9, 2014: CYLINDER. CRACKED. DURING SCHEDULED INSPECTION, NOTICED LIGHT COATING OF OIL TOP FWD CASE. CLEANED AND COMPLIED WITH CSB97-9 DYE CHECK. VERIFIED CRACK FWD TOP OF NR 5 CYLINDER. NO
- [SDR 2013FA0000508](https://openairdocs.org/sdr/2013FA0000508), Jul 29, 2013: WASTEGATE VALVE. SEPARATED. THREADS IN WASTEGATE ACTUATOR FAILED AT OIL FEED LINE, FITTING SEPARATED FORM ACTUATOR RELEASING ALL OIL FROM LT ENGINE DURING FLIGHT.
- [SDR 2013FA0000450](https://openairdocs.org/sdr/2013FA0000450), Jun 13, 2013: STUD. CRACKED. ENGINE RUNNING ROUGH UNDER POWER AND NR 5 CYLINDER MONITOR COOLER THAN THE REST. DURING INSPECTION, FOUND FOUR CYLINDER STUDS MISSING AND A GAP BETWEEN CYLINDER
- [SDR F472013F00000](https://openairdocs.org/sdr/F472013F00000), Jun 6, 2013: TUBE. DESTROYED. ON LANDING RT MAIN TIRE BLEW. ON TEARDOWN INSPECTION, NOTED TUBE WAS TOTALLY DESTROYED. REPLACED TIRE AND TUBE.
- [SDR 2013FA0000242](https://openairdocs.org/sdr/2013FA0000242), Apr 24, 2013: CYLINDER. DAMAGED. NR 5 CYLINDER SEPARATED FORM ENGINE IN FLIGHT BENT NR5 ROD AND DAMAGED CASE. PILOT FEATHERED ENGINE ON DECENT AND LANDED WITHOUT INCIDENT.
- [SDR CA130401025](https://openairdocs.org/sdr/CA130401025), Mar 28, 2013: CRANKCASE. CRACKED. (CAN) PILOT REPORTED FINDING AN OIL LEAK ON THE RT ENGINE AND ASKED MAINTENANCE TO INVESTIGATE. UPON INVESTIGATION THE SOURCE OF THE OIL WAS FOUND TO BE A CRACK
- [SDR CA130326001](https://openairdocs.org/sdr/CA130326001), Mar 25, 2013: NUT. SPLIT. (CAN) THE PILOT REPORTED THAT DURING A PRE-FLIGHT WALK-AROUND INSPECTION HE FOUND A LOOSE NUT IN THE RT ENGINE COWL. THE NUT WAS FOUND TO BE SPLIT ACROSS THE TH
- [SDR 2013FA0000095](https://openairdocs.org/sdr/2013FA0000095), Feb 1, 2013: CYLINDER. SEPARATED. NR 5 CYLINDER HAD BARREL SEPARATION DURING FLIGHT.
- [SDR JBZA20121231005](https://openairdocs.org/sdr/JBZA20121231005), Dec 26, 2012: AUTOPILOT SYS. MALFUNCTIONED. PASSING THROUGH 8000FT MSL, THE AUTOPILOT SYS WENT INTO AN UNCOMMANDED NOSE PITCH OVER RAPID DESCENT. PILOT TRIED THE AUTOPILOT DISCONNECT SWITCH WHILE TRYING T
- [SDR F472012F00000](https://openairdocs.org/sdr/F472012F00000), Nov 25, 2012: ENGINE. MAKING METAL. RT ENGINE LOSS OF POWER ON CLIMBOUT. ENGINE FEATHER. METAL IN OIL FILTER AND OIL PLUG. DAMPNER DOESN`T TRACK TRUE.
- [SDR 2012FA0000653](https://openairdocs.org/sdr/2012FA0000653), Sep 21, 2012: GOVERNOR. FAILED. AFTER TAKEOFF, THE RT ENGINE PROPELLER WENT INTO A FULL FEATHER. ENGINE SHUTDOWN AUTOMATICALLY AND ONE ATTEMPT TO RESTART WAS MADE WITH NO SUCCESS. A LANDING WA
- [SDR 2012FA0000447](https://openairdocs.org/sdr/2012FA0000447), Jun 20, 2012: ENGINE. FAILED. DURING A TEST FLIGHT, HAD A RT ENGINE FAILURE AT APPROX 2500 FT, REDUCED POWER TO 34.5 INCHES OF MAP AND LEANED ENGINES TO APPROX 35 GAL/HR/SIDE. CLIMBING THROU
- [SDR 2012FA0000113](https://openairdocs.org/sdr/2012FA0000113), Feb 2, 2012: GEAR. BROKEN. DURING ANNUAL INSPECTION, WHILE COMPLYING WITH AD-07-05-15 (DATED 04/16/07), STARTER ADAPTER 400-HOUR INSPECTION IAW MSB 94-4G, FOUND ONE BROKEN TOOTH ON CAMSHA
- [SDR CA120117002](https://openairdocs.org/sdr/CA120117002), Jan 13, 2012: WINDSHIELD. CRACKED. (CAN) PILOT`S SIDE, LT, WINDSHIELD, ACRYLIC-HEATED, CRACKED IN-FLIGHT, CRUISE. ACFT WAS DEPRESSURIZED AND LANDED WITHOUT INCIDENT AT CLOSEST SUITABLE AIRPORT.
- [SDR F47A2012F00000](https://openairdocs.org/sdr/F47A2012F00000), Dec 23, 2011: CRANKCASE. CRACKED. UPON INSPECTION OF RT ENGINE, VERIFIED CRACKED RT SIDE CASE, FROM NR 5 TOP CYLINDER, AREA THRU DATA PLATE IE RAM STC SE8338SW-D-SMOX 165.2 HRS.
- [SDR U7Z2011F00000](https://openairdocs.org/sdr/U7Z2011F00000), Oct 12, 2011: CONNECTING ROD. CRACKED. REMOVED THE ENGINE FROM RT POSITION FOR SHIPMENT BACK DUE TO A DAMAGED CASE. DAMAGE APPEARS TO BE CAUSED BY A FAILED CONNECTING ROD THAT BROKE APART AND PUNCTUR
- [SDR 2011FA0000660](https://openairdocs.org/sdr/2011FA0000660), Oct 4, 2011: EXHAUST ROCKER. BROKEN. PILOT STATED HE WAS IN NORMAL CRUISE, WHEN HE SUDDENLY LOST POWER AND NOTICED A VIBRATION FROM THE LT ENGINE. HE IMMEDIATELY FEATHERED THE LT ENGINE AND LANDED.
- [SDR 2011F00188](https://openairdocs.org/sdr/2011F00188), Sep 10, 2011: OIL SYSTEM. LOW PRESSURE. NO OIL PRESSURE RIGHT ENGINE. RIGHT ENGINE WOULD NOT COMPLETELY FEATHER.
- [SDR FMMA20111005001](https://openairdocs.org/sdr/FMMA20111005001), Sep 10, 2011: UNKNOWN. MALFUNCTIONED. NO OIL PRESSURE RIGHT ENGINE. RIGHT PROPELLER WOULD NOT COMPLETELY FEATHER.
- [SDR FMMA20111005002](https://openairdocs.org/sdr/FMMA20111005002), Sep 10, 2011: RETAINER. BROKEN. ROCKER SHAFT RETAINER BROKE LETTING 1/3 OF RETAINER TO DROB TO BOTTOM OF ROCKER BOX COVER WHERE IT LODGED BETWEEN END OF ROCKER ARM. PUNCHED HOLE IN COVER - LET
- [SDR 2011FA0000267](https://openairdocs.org/sdr/2011FA0000267), Apr 8, 2011: MAGNETO. SEIZED. PILOT REPORTED THE LT ENGINE WAS RUNNING RUFF. THE LT ENGINE WOULD NOT START WHEN TRYING TO TROUBLESHOOT. THE LT MAG HAD SEIZED UP AND DAMAGED THE RUBBER MAG DR
- [SDR F472011F00000](https://openairdocs.org/sdr/F472011F00000), Mar 28, 2011: CASE. CRACKED. 10 MILES FROM LANDING, PILOT REPORTED RT ENG ROUGH AFTER TROUBLESHOOTING WITH MAG, FUEL AND PUMPS. NOTICED OIL FROM ACCESS DOOR. ENGINE WAS FEATHERED AND SECURE
- [SDR VE72010F00000](https://openairdocs.org/sdr/VE72010F00000), Aug 22, 2010: LUG. BROKEN. ACFT SUFFERED NOSE GEAR COLLAPSE NEAR THE END OF ITS ROLL OUT AFTER LANDING. PART OF UPPER MOUNTING BRACKET FOR NOSE GEAR ACTUATOR BROKE FREE OF AIRFRAME RELEAS
- [SDR 2011F00141](https://openairdocs.org/sdr/2011F00141), Jul 19, 2010: JOURNAL. MISMANUFACTURED. ENGINE DEVELOPED A VIBRATION. UPON REMOVAL AND TEARDOWN, IT WAS DISCOVERED THAT THE CAM JOURNALS WERE MISSING THE NECESSARY LUBRICATION CHANNELS. IT IS THE OPIN
- [SDR CA090826009](https://openairdocs.org/sdr/CA090826009), Aug 9, 2009: VALVE SPRING. BROKEN. (CAN) CREW REPORTED RT ENG RUNNING ROUGH. UPON INSP, MX FOUND NR5 CYL EXHAUST VALVE SPRING BROKEN. SPRING REPLACED AND ENG GROUND RUN NORMAL.
- [SDR CA090728008](https://openairdocs.org/sdr/CA090728008), Jun 29, 2009: SKIN. CRACKED. (CAN) DURING INSPECTION, REFERENCED SKIN WAS FOUND CRACKED UNDER NOSE GEAR TRUNNION BEARING SUPPORT BLOCK SPACER. CRACK THAT WAS FORMING FOLLOWED THE EXACT EDGE
- [SDR K4SA200901](https://openairdocs.org/sdr/K4SA200901), Jun 24, 2009: DISTRIBUTOR GEAR. BROKEN. AFTER LEVEL OFF FOR CRUISE, A VIBRATION OR BUFFET WAS NOTED. ALL ENGINE TEMPS AND INDICATIONS APPEARED NORMAL. WAS UNABLE TO IDENTIFY WHICH ENGINE WAS CAUSING V
- [SDR 2008FA0000199](https://openairdocs.org/sdr/2008FA0000199), Mar 18, 2008: CASE. CRACKED. REMOVED THIS ENGINE FROM THE RT POSITION FOR SHIPMENT BACK TO RAM AC DUE TO A DAMAGED CASE. DAMAGE APPEARS TO BE CAUSED BY A FAILED CONNECTING ROD THAT BROKE AP
- [SDR 2007FA0000781](https://openairdocs.org/sdr/2007FA0000781), Aug 10, 2007: CRANKSHAFT. FAILED. CRANKSHAFT FAILED NDI SB MSB96-10. (K)
- [SDR CA070510004](https://openairdocs.org/sdr/CA070510004), Apr 20, 2007: CYLINDER. BROKEN. (CAN) WHEN DOING 100 HRS INSP, FOUND DAMAGE ON COVER VALVE ROCKER CYLINDER NR 4, COVER (PN : 631834) REMOVED AND FOUND RETAINER ROCKER SHAFT (PN: 646032) BROKEN
- [SDR FAA200612001](https://openairdocs.org/sdr/FAA200612001), Dec 6, 2006: CYLINDER. SEPARATED. DURING TAKEOFF ROLL PILOT REPORTED A LOUD POP FROM THE LEFT ENGINE AND THE AIRCRAFT YAWED TO THE LEFT. THE TAKEOFF WAS ABORTED. VISUAL INSPECTION REVEALED THE N
- [SDR 1234567890](https://openairdocs.org/sdr/1234567890), Apr 12, 2006: ADAPTER. FAILED. FAILURE OF STARTER ADAPTER SHAFT GEAR IN FLIGHT CAUSED ENGINE SURGING AND LOSS OF POWER. PILOT THEN FOLLOWED APPROPRIATE AFM SHUT DOWN PROCEDURES. POST FLIGHT I
- [SDR N582006F00000](https://openairdocs.org/sdr/N582006F00000), Feb 10, 2006: CASE HALF. CRACKED. RT ENGINE WAS SHUTDOWN IN FLIGHT DUE TO EXTREME SHAKING. PROP FEATHERED OK AND AIRCRAFT LANDIED WITHOUT FURTHER INCIDENT. AFTER ENGINE SHUTDOWN PILOT NOTED OIL 

All 139: https://openairdocs.org/engine/continental-gtsio-520-l/reports.md

## STCs that may be installed (OpenAirDocs) (25)

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 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

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