# Continental GTSIO-520-C

- Type: Engine model (FAA registry)
- Registry code: 17035
- Manufacturer (registry): CONT MOTOR
- Model: GTSIO-520-C
- Engine type: Reciprocating
- Power: 340 hp
- Data sheet: [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 387 registered aircraft
- Page: https://openairdocs.org/engine/continental-gtsio-520-c

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 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 (387, first 50)

- [N100AJ](https://openairdocs.org/aircraft/N100AJ): [N8006j LLC](https://openairdocs.org/faa-owner/N8006J%20LLC), [Shiloh, IL](https://openairdocs.org/faa-place/IL/Shiloh), built 1972, S/N 421B0322
- [N100JL](https://openairdocs.org/aircraft/N100JL): [Bytelogics Inc](https://openairdocs.org/faa-owner/BYTELOGICS%20INC), [New York, NY](https://openairdocs.org/faa-place/NY/New%20York), S/N 421-0008
- [N1021](https://openairdocs.org/aircraft/N1021): [N1021 Inc](https://openairdocs.org/faa-owner/N1021%20INC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1972, S/N 12016
- [N1027D](https://openairdocs.org/aircraft/N1027D): [Robins Jack S](https://openairdocs.org/faa-owner/ROBINS%20JACK%20S), [Saint Charles, ID](https://openairdocs.org/faa-place/ID/Saint%20Charles), built 1968, S/N 421-0196
- [N103EC](https://openairdocs.org/aircraft/N103EC): [Aerial Surveys International LLC](https://openairdocs.org/faa-owner/AERIAL%20SURVEYS%20INTERNATIONAL%20LLC), [Watkins, CO](https://openairdocs.org/faa-place/CO/Watkins), built 1967, S/N 401-0135
- [N10GM](https://openairdocs.org/aircraft/N10GM): [Alo Aviation LLC](https://openairdocs.org/faa-owner/ALO%20AVIATION%20LLC), [Titusville, FL](https://openairdocs.org/faa-place/FL/Titusville), S/N T210-0151
- [N111EC](https://openairdocs.org/aircraft/N111EC): [Gs Wings Inc](https://openairdocs.org/faa-owner/GS%20WINGS%20INC), [Pawnee, IL](https://openairdocs.org/faa-place/IL/Pawnee), built 1967, S/N D-8385
- [N111PW](https://openairdocs.org/aircraft/N111PW): [Kilgore Eric M](https://openairdocs.org/faa-owner/KILGORE%20ERIC%20M), [Genoa, NV](https://openairdocs.org/faa-place/NV/Genoa), S/N T210-0066
- [N111SD](https://openairdocs.org/aircraft/N111SD): [Marc Inc](https://openairdocs.org/faa-owner/MARC%20INC), [Bolton, MS](https://openairdocs.org/faa-place/MS/Bolton), built 1969, S/N 310P0200
- [N111TF](https://openairdocs.org/aircraft/N111TF): [Pacific Aviation Aircraft Management Inc](https://openairdocs.org/faa-owner/PACIFIC%20AVIATION%20AIRCRAFT%20MANAGEMENT%20INC), [Ontario, OR](https://openairdocs.org/faa-place/OR/Ontario), built 1974, S/N 421B0660
- [N111TL](https://openairdocs.org/aircraft/N111TL): [Ndk Global Holdings Corp](https://openairdocs.org/faa-owner/NDK%20GLOBAL%20HOLDINGS%20CORP), [Dover, DE](https://openairdocs.org/faa-place/DE/Dover), built 1974, S/N 421B0645
- [N112AL](https://openairdocs.org/aircraft/N112AL): [Passport Auto & Aviation Inc](https://openairdocs.org/faa-owner/PASSPORT%20AUTO%20%26%20AVIATION%20INC), [Richmond, VA](https://openairdocs.org/faa-place/VA/Richmond), built 1979, S/N 421C0697
- [N113MP](https://openairdocs.org/aircraft/N113MP): [Ban Air LLC](https://openairdocs.org/faa-owner/BAN%20AIR%20LLC), [Boerne, TX](https://openairdocs.org/faa-place/TX/Boerne), built 1982, S/N 421C1235
- [N114HV](https://openairdocs.org/aircraft/N114HV): [Aerowerks LLC](https://openairdocs.org/faa-owner/AEROWERKS%20LLC), [Georgetown, TX](https://openairdocs.org/faa-place/TX/Georgetown), built 1973, S/N 421B0371
- [N1223H](https://openairdocs.org/aircraft/N1223H): [S&S Leasing Solutions LLC](https://openairdocs.org/faa-owner/S%26S%20LEASING%20SOLUTIONS%20LLC), [Sandy Springs, GA](https://openairdocs.org/faa-place/GA/Sandy%20Springs), built 1973, S/N 421B0365
- [N123BT](https://openairdocs.org/aircraft/N123BT): [Yingling Consultation LLC](https://openairdocs.org/faa-owner/YINGLING%20CONSULTATION%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1973, S/N 421B0414
- [N124WC](https://openairdocs.org/aircraft/N124WC): [3-B Farms Inc](https://openairdocs.org/faa-owner/3-B%20FARMS%20INC), [Pinetown, NC](https://openairdocs.org/faa-place/NC/Pinetown), built 1973, S/N 421B0484
- [N12KN](https://openairdocs.org/aircraft/N12KN): [Jane Air LLC](https://openairdocs.org/faa-owner/JANE%20AIR%20LLC), [Kalamazoo, MI](https://openairdocs.org/faa-place/MI/Kalamazoo), built 1968, S/N 421-0130
- [N12WT](https://openairdocs.org/aircraft/N12WT): [Mtzb Corp](https://openairdocs.org/faa-owner/MTZB%20CORP), [New York, NY](https://openairdocs.org/faa-place/NY/New%20York), built 1974, S/N 421B0829
- [N1338U](https://openairdocs.org/aircraft/N1338U): [Jstream Lc](https://openairdocs.org/faa-owner/JSTREAM%20LC), [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan), built 1965, S/N 411-0105
- [N1421U](https://openairdocs.org/aircraft/N1421U): [Aviation Services Of Tn Inc](https://openairdocs.org/faa-owner/AVIATION%20SERVICES%20OF%20TN%20INC), [Sparta, TN](https://openairdocs.org/faa-place/TN/Sparta), built 1967, S/N 421-0046
- [N144R](https://openairdocs.org/aircraft/N144R): [Extrivo Inc](https://openairdocs.org/faa-owner/EXTRIVO%20INC), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 1967, S/N D-8496
- [N1463C](https://openairdocs.org/aircraft/N1463C): [Latta Lutz M](https://openairdocs.org/faa-owner/LATTA%20LUTZ%20M), [San Francisco, CA](https://openairdocs.org/faa-place/CA/San%20Francisco), built 2003, S/N 1356
- [N147U](https://openairdocs.org/aircraft/N147U): [Martin Delano R](https://openairdocs.org/faa-owner/MARTIN%20DELANO%20R), [Spring, TX](https://openairdocs.org/faa-place/TX/Spring), S/N D-8533
- [N1505T](https://openairdocs.org/aircraft/N1505T): [N1505t LLC](https://openairdocs.org/faa-owner/N1505T%20LLC), [Tucson, AZ](https://openairdocs.org/faa-place/AZ/Tucson), built 1966, S/N P206-0212
- [N150WR](https://openairdocs.org/aircraft/N150WR): [Whiskey Romeo LLC](https://openairdocs.org/faa-owner/WHISKEY%20ROMEO%20LLC), [Timnath, CO](https://openairdocs.org/faa-place/CO/Timnath), built 1969, S/N D-8911
- [N151MT](https://openairdocs.org/aircraft/N151MT): [Island Mountain Aviation LLC](https://openairdocs.org/faa-owner/ISLAND%20MOUNTAIN%20AVIATION%20LLC), [Vesta, MN](https://openairdocs.org/faa-place/MN/Vesta), built 1973, S/N 21059861
- [N1527G](https://openairdocs.org/aircraft/N1527G): [Hanley Thomas W](https://openairdocs.org/faa-owner/HANLEY%20THOMAS%20W), [Kissimmee, FL](https://openairdocs.org/faa-place/FL/Kissimmee), built 1974, S/N 421B0623
- [N1534G](https://openairdocs.org/aircraft/N1534G): [Rugger Investment Group LLC](https://openairdocs.org/faa-owner/RUGGER%20INVESTMENT%20GROUP%20LLC), [Tustin, CA](https://openairdocs.org/faa-place/CA/Tustin), S/N 421B0630
- [N1543G](https://openairdocs.org/aircraft/N1543G): [Qds Aviation LLC](https://openairdocs.org/faa-owner/QDS%20AVIATION%20LLC), [Baton Rouge, LA](https://openairdocs.org/faa-place/LA/Baton%20Rouge), built 1974, S/N 421B0639
- [N1545G](https://openairdocs.org/aircraft/N1545G): [Saltzer Eric R](https://openairdocs.org/faa-owner/SALTZER%20ERIC%20R), [Somerton, AZ](https://openairdocs.org/faa-place/AZ/Somerton), built 1966, S/N T210-0208
- [N1592G](https://openairdocs.org/aircraft/N1592G): [Ctl Legacy Holdings LLC](https://openairdocs.org/faa-owner/CTL%20LEGACY%20HOLDINGS%20LLC), [Midland, TX](https://openairdocs.org/faa-place/TX/Midland), built 1974, S/N 421B0822
- [N15ZP](https://openairdocs.org/aircraft/N15ZP): [Stefenelli Aviation N Tr Inc Trustee](https://openairdocs.org/faa-owner/STEFENELLI%20AVIATION%20N%20TR%20INC%20TRUSTEE), Attersee, S/N 421B0919
- [N1621T](https://openairdocs.org/aircraft/N1621T): [Beats Driving Inc](https://openairdocs.org/faa-owner/BEATS%20DRIVING%20INC), [Northbrook, IL](https://openairdocs.org/faa-place/IL/Northbrook), built 1973, S/N 414-0401
- [N17HL](https://openairdocs.org/aircraft/N17HL): [Riley Charles S](https://openairdocs.org/faa-owner/RILEY%20CHARLES%20S), [Littleton, CO](https://openairdocs.org/faa-place/CO/Littleton), S/N 421B-0310
- [N183DA](https://openairdocs.org/aircraft/N183DA): [Hullmann John](https://openairdocs.org/faa-owner/HULLMANN%20JOHN), [Palo Alto, CA](https://openairdocs.org/faa-place/CA/Palo%20Alto), built 2003, S/N 1349
- [N1919L](https://openairdocs.org/aircraft/N1919L): [Smith Sydney O](https://openairdocs.org/faa-owner/SMITH%20SYDNEY%20O), [Lithonia, GA](https://openairdocs.org/faa-place/GA/Lithonia), S/N 411-0157
- [N1942G](https://openairdocs.org/aircraft/N1942G): [Bas Part Sales LLC](https://openairdocs.org/faa-owner/BAS%20PART%20SALES%20LLC), [Greeley, CO](https://openairdocs.org/faa-place/CO/Greeley), built 1974, S/N 421B0842
- [N1944G](https://openairdocs.org/aircraft/N1944G): [Bas Part Sales LLC](https://openairdocs.org/faa-owner/BAS%20PART%20SALES%20LLC), [Greeley, CO](https://openairdocs.org/faa-place/CO/Greeley), built 1974, S/N 421B0844
- [N1946G](https://openairdocs.org/aircraft/N1946G): [Partwin421 LLC](https://openairdocs.org/faa-owner/PARTWIN421%20LLC), [Greenwich, CT](https://openairdocs.org/faa-place/CT/Greenwich), built 1974, S/N 421B0846
- [N1GQ](https://openairdocs.org/aircraft/N1GQ): [Aero Attack Systems (USA) Inc](https://openairdocs.org/faa-owner/AERO%20ATTACK%20SYSTEMS%20(USA)%20INC), [Blaine, WA](https://openairdocs.org/faa-place/WA/Blaine), built 1972, S/N 421B0236, Non-citizen corporation, flight hours not reported
- [N1LQ](https://openairdocs.org/aircraft/N1LQ): [Strydom Cornelis F](https://openairdocs.org/faa-owner/STRYDOM%20CORNELIS%20F), [Liberal, KS](https://openairdocs.org/faa-place/KS/Liberal), built 1966, S/N T210-0148
- [N1QG](https://openairdocs.org/aircraft/N1QG): [Los Arboles Management Company LLC](https://openairdocs.org/faa-owner/LOS%20ARBOLES%20MANAGEMENT%20COMPANY%20LLC), [Moriarty, NM](https://openairdocs.org/faa-place/NM/Moriarty), built 1966, S/N D-8328
- [N1YA](https://openairdocs.org/aircraft/N1YA): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1974, S/N 421B0580
- [N200DC](https://openairdocs.org/aircraft/N200DC): [Bjg Aviation I LLC](https://openairdocs.org/faa-owner/BJG%20AVIATION%20I%20LLC), [Neelyville, MO](https://openairdocs.org/faa-place/MO/Neelyville), built 1981, S/N 421C1223
- [N202AA](https://openairdocs.org/aircraft/N202AA): [Simply Living LLC](https://openairdocs.org/faa-owner/SIMPLY%20LIVING%20LLC), [Fort Myers, FL](https://openairdocs.org/faa-place/FL/Fort%20Myers), built 1980, S/N 421C1015
- [N202Z](https://openairdocs.org/aircraft/N202Z): [Lojas Phillip](https://openairdocs.org/faa-owner/LOJAS%20PHILLIP), [San Ysidro, CA](https://openairdocs.org/faa-place/CA/San%20Ysidro), S/N 411-0292
- [N208V](https://openairdocs.org/aircraft/N208V): [Bas Part Sales LLC](https://openairdocs.org/faa-owner/BAS%20PART%20SALES%20LLC), [Greeley, CO](https://openairdocs.org/faa-place/CO/Greeley), built 1975, S/N 421B0866
- [N20EZ](https://openairdocs.org/aircraft/N20EZ): [Bigfork, MT](https://openairdocs.org/faa-place/MT/Bigfork), built 1969, S/N 310P0078, Registration pending
- [N20MW](https://openairdocs.org/aircraft/N20MW): [Striebel David J](https://openairdocs.org/faa-owner/STRIEBEL%20DAVID%20J), [Dayton, OH](https://openairdocs.org/faa-place/OH/Dayton), built 1975, S/N 421B0918

All 387: https://openairdocs.org/engine/continental-gtsio-520-c/aircraft.md

## NTSB investigations (332, newest 50)

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 GAA26WA228](https://openairdocs.org/ntsb/GAA26WA228), Jun 25, 2026: Cessna 401 (N35VC), Ciudad del Carmen, Mexico, substantial damage
- [NTSB ERA26FA179](https://openairdocs.org/ntsb/ERA26FA179), Apr 19, 2026: Cessna 401B (N122AT), Land O' Lakes, FL, destroyed, 1 fatal, investigation ongoing
- [NTSB WPR26LA145](https://openairdocs.org/ntsb/WPR26LA145), Mar 27, 2026: Cessna 421B (N799TF), Sedona, AZ, substantial damage, investigation ongoing
- [NTSB ERA26LA050](https://openairdocs.org/ntsb/ERA26LA050), Nov 18, 2025: Cessna 401 (N6255Q), Eureka, NC, substantial damage, investigation ongoing
- [NTSB ANC24FA094](https://openairdocs.org/ntsb/ANC24FA094), Sep 16, 2024: Cessna 207 (N90193), Saint Mary's, AK, destroyed, 4 fatal, investigation ongoing
- [NTSB CEN24FA212](https://openairdocs.org/ntsb/CEN24FA212), Jun 7, 2024: Beech V35A (N150WR), Arvada, CO, destroyed, 1 fatal. Probable cause: A total loss of engine power due to oil starvation as a result of loose turbocharger oil line fittings.
- [NTSB DCA24WA107](https://openairdocs.org/ntsb/DCA24WA107), Feb 21, 2024: Cessna 421C (N421RN), Tapachula, Mexico, incident, no damage
- [NTSB CEN24LA063](https://openairdocs.org/ntsb/CEN24LA063), Dec 13, 2023: Cessna T210 (N6789R), Sapulpa, OK, substantial damage. Probable cause: The total loss of engine power due to the failure of the left magneto and subsequent damage to a lead for the right magneto.
- [NTSB ERA24LA041](https://openairdocs.org/ntsb/ERA24LA041), Nov 11, 2023: Cessna 421 (N977SM), Lake City, FL, substantial damage. Probable cause: A landing gear collapse following an aborted takeoff due to degraded climb performance for reasons that could not be determined.
- [NTSB CEN23LA267](https://openairdocs.org/ntsb/CEN23LA267), Jun 24, 2023: Cessna 421 (N123SM), Rockport, TX, substantial damage. Probable cause: The failure of the left engine starter adapter gear, which resulted in catastrophic damage to other engine components, and the subsequent loss of engine power.
- [NTSB WPR23LA084](https://openairdocs.org/ntsb/WPR23LA084), Dec 8, 2022: Cessna TP206A (N30WL), Maricopa, AZ, substantial damage. Probable cause: A total loss of engine power due to fuel starvation. Contributing to the accident was the pilot’s improper fuel management.
- [NTSB CEN22LA341](https://openairdocs.org/ntsb/CEN22LA341), Jul 16, 2022: Cessna 421B (N21GF), Riverdale, NE, substantial damage. Probable cause: A total loss of engine power as a result of fuel exhaustion.
- [NTSB ERA22LA317](https://openairdocs.org/ntsb/ERA22LA317), Jul 15, 2022: Cessna T210F (N6195R), Monticello, NY, destroyed. Probable cause: Maintenance personnel’s improper torque of the engine through-bolts during maintenance, which resulted in a bearing shift, oil starvation, and a total loss of engine power.
- [NTSB CEN22FA042](https://openairdocs.org/ntsb/CEN22FA042), Nov 22, 2021: Cessna T310R (N310JA), Chadron, NE, destroyed, 3 fatal. Probable cause: The incapacitating effects of a myocardial infarction (heart attack), which resulted in the pilot's loss of airplane control and impact with terrain.
- [NTSB CEN21LA341](https://openairdocs.org/ntsb/CEN21LA341), Jul 27, 2021: Cessna T210F (N6162R), Peyton, CO, substantial damage. Probable cause: The pilot’s fuel mismanagement that resulted in a complete loss of engine power during climb and subsequent impact with terrain during a forced landing.
- [NTSB WPR21LA285](https://openairdocs.org/ntsb/WPR21LA285), Jul 9, 2021: Cessna T210 (N6856R), Missoula, MT, substantial damage. Probable cause: The pilot's failure to extend the landing gear during landing. Contributing to the accident was the pilot’s failure to use a pre-landing checklist.
- [NTSB ERA19FA283](https://openairdocs.org/ntsb/ERA19FA283), Sep 29, 2019: Cessna 421 (N731PF), Deland, FL, destroyed, 3 fatal. Probable cause: The pilot’s failure to maintain control of the airplane, which resulted in a collision with terrain. Contributing was the pilot’s lack of training and experience in the accident airplane make and…
- [NTSB CEN19FA323](https://openairdocs.org/ntsb/CEN19FA323), Sep 18, 2019: Beech V35 (N5438U), London, OH, destroyed, 1 fatal. Probable cause: The pilot’s exceedance of the airplane’s critical angle of attack while maneuvering toward the final leg of the traffic pattern and facing the rising sun, which resulted in a subsequent aerodynamic…
- [NTSB CEN19FA100](https://openairdocs.org/ntsb/CEN19FA100), Mar 17, 2019: Cessna 421 (N424TW), Plain City, OH, destroyed, 1 fatal. Probable cause: A loss of airspeed indication due to icing of the airplane's pitot probe, and the pilot's loss of control while maneuvering.
- [NTSB GAA18CA390](https://openairdocs.org/ntsb/GAA18CA390), Jul 1, 2018: Cessna 421 (N7625Q), Clifton, TX, substantial damage. Probable cause: The pilot's improper landing flare in crosswind conditions, which resulted in a hard landing.
- [NTSB ERA18WA159](https://openairdocs.org/ntsb/ERA18WA159), Jun 5, 2018: Cessna 421B (N421MM), Rock Sound, Bahamas, destroyed, 3 fatal
- [NTSB WPR17LA131](https://openairdocs.org/ntsb/WPR17LA131), Jun 22, 2017: Cessna 421B (N380AL), Carlsbad, CA, substantial damage. Probable cause: The right main landing gear collapse for undetermined reasons.
- [NTSB ERA17FA118](https://openairdocs.org/ntsb/ERA17FA118), Mar 4, 2017: Cessna 421 (N421KL), Canton, GA, substantial damage, 1 fatal. Probable cause: The pilot's failure to maintain control of the airplane during a night visual landing approach. Contributing to the accident was the pilot's impairment due to his use of a combination of medications.
- [NTSB CEN16LA323](https://openairdocs.org/ntsb/CEN16LA323), Aug 13, 2016: Cessna TU206C (N29225), Skiatook, OK, substantial damage. Probable cause: A total loss of engine power after takeoff for reasons that could not be determined based on the available information.
- [NTSB GAA16CA042](https://openairdocs.org/ntsb/GAA16CA042), Oct 14, 2015: Cessna 421 (N19CH), Amarillo, TX, substantial damage. Probable cause: The loss of directional control during taxi to the runway as a result of insufficient brake fluid level in the right brake master cylinder, resulting in a taxiway excursion and collision with a…
- [NTSB WPR16LA008](https://openairdocs.org/ntsb/WPR16LA008), Oct 13, 2015: Cessna T210K (N8273M), Boise, ID, substantial damage. Probable cause: The pilot’s improper in-flight fuel management due to distraction and self-induced pressure, which resulted in fuel starvation and a total loss of engine power. Contributing to the accident was the…
- [NTSB CEN14CA310](https://openairdocs.org/ntsb/CEN14CA310), May 24, 2014: Cessna 421A (N936U), Dallas, TX, substantial damage. Probable cause: The improper rigging of the landing gear by maintenance personnel, which resulted in the landing gear collapse.
- [NTSB CEN14LA256](https://openairdocs.org/ntsb/CEN14LA256), Apr 22, 2014: Cessna 421 (N866BS), Horseshoe Bay, TX, substantial damage. Probable cause: The failure of the drive mechanism for the gearbox motor, which resulted in the gear not extending for the landing.
- [NTSB ERA14LA170](https://openairdocs.org/ntsb/ERA14LA170), Mar 20, 2014: Cessna 421 (N5929M), Charleston, SC, substantial damage. Probable cause: Inadequate maintenance, which resulted in the collapse of the right main landing gear during landing.
- [NTSB CEN13FA352](https://openairdocs.org/ntsb/CEN13FA352), Jun 15, 2013: Aero Commander 685 (N74CP), Victoria, TX, substantial damage. Probable cause: Maintenance personnel's failure to secure the left engine idler pin during overhaul, which resulted in a catastrophic engine failure and subsequent forced landing.
- [NTSB WPR13FA037](https://openairdocs.org/ntsb/WPR13FA037), Nov 11, 2012: Cessna 421C (N700EM), Shaver Lake, CA, substantial damage, 2 fatal. Probable cause: The pilot's failure to regain airplane control following a sudden rapid descent during cruise, which resulted in an in-flight breakup. Contributing to the accident was the pilot's decision to make…
- [NTSB CEN13FA039](https://openairdocs.org/ntsb/CEN13FA039), Nov 1, 2012: Cessna 320E (N10PM), San Marcos, TX, substantial damage, 1 fatal. Probable cause: The non-instrument-rated pilot’s decision to takeoff in night instrument meteorological conditions, which resulted in spatial disorientation and a loss of control.
- [NTSB ERA12LA589](https://openairdocs.org/ntsb/ERA12LA589), Sep 29, 2012: Cessna 421B (N1537T), Selma, AL, substantial damage. Probable cause: The pilot’s improper fuel management, which resulted in a total loss of engine power on the right engine and a partial loss of engine power on the left engine due to fuel starvation.
- [NTSB CEN12FA606](https://openairdocs.org/ntsb/CEN12FA606), Sep 5, 2012: Cessna 421B (N69924), Fort Worth, TX, substantial damage. Probable cause: The pilot's failure to maintain airplane control on takeoff, which resulted in an inadvertent stall. Contributing to the accident were the unlatched nose cargo door, the pilot’s diverted attention,…
- [NTSB CEN12CA104](https://openairdocs.org/ntsb/CEN12CA104), Dec 9, 2011: Cessna 421B (N421CE), Pampa, TX, substantial damage. Probable cause: The pilot's inadequate aircraft control during landing, which resulted in a hard landing.
- [NTSB WPR10CA409](https://openairdocs.org/ntsb/WPR10CA409), Aug 18, 2010: Cessna TP206B (N8611Z), Saint Maries, ID, substantial damage. Probable cause: A loss of aircraft control during takeoff due to an inadvertent collision with a deer that ran onto the runway.
- [NTSB CEN10FA382](https://openairdocs.org/ntsb/CEN10FA382), Jul 11, 2010: Cessna 421 (N88DF), Tulsa, OK, substantial damage, 3 fatal. Probable cause: The pilot’s inadequate preflight fuel planning and management in-flight, which resulted in total loss of engine power due to fuel exhaustion. Contributing to the accident was the pilot’s use of…
- [NTSB CEN10MA367](https://openairdocs.org/ntsb/CEN10MA367), Jul 4, 2010: Cessna 421B (N31AS), Alpine, TX, substantial damage, 5 fatal. Probable cause: The degraded performance of the airplane due to the pilot not properly setting the flaps and retracting the landing gear after takeoff. Contributing to the accident was the pilot’s fatigue.
- [NTSB WPR10LA002](https://openairdocs.org/ntsb/WPR10LA002), Oct 3, 2009: Cessna 421B (N31KT), San Simeon, CA, substantial damage. Probable cause: The pilot's failure to follow the manufacturer’s checklist and set the parking brake.
- [NTSB WPR09CA478](https://openairdocs.org/ntsb/WPR09CA478), Sep 14, 2009: Cessna T210J (N899KM), Albany, OR, substantial damage. Probable cause: The malfunction of the left main wheel brake during landing due to inadequate hydraulic fluid in the left brake pedal master cylinder due to leakage.
- [NTSB WPR09FA258](https://openairdocs.org/ntsb/WPR09FA258), May 23, 2009: Cessna 320D (N320KP), Fallon, NV, substantial damage, 4 fatal. Probable cause: The pilot’s inadequate airspeed, which resulted in an aerodynamic stall.
- [NTSB CEN09LA284](https://openairdocs.org/ntsb/CEN09LA284), May 8, 2009: Cessna 421B (N60HG), Alpine, TX, substantial damage. Probable cause: The loss of engine power due to disengagement of the magneto idler gear support pin.
- [NTSB ERA09FA248](https://openairdocs.org/ntsb/ERA09FA248), Apr 17, 2009: Cessna 421B (N1935G), Oakland Park, FL, substantial damage, 1 fatal. Probable cause: The pilot's failure to maintain aircraft control and secure the right engine during an emergency return to the airport after takeoff. Contributing to the accident was an in-flight fire of the right…
- [NTSB WPR09CA017](https://openairdocs.org/ntsb/WPR09CA017), Oct 19, 2008: Cessna TU206A (N4807F), Buckeye, AZ, substantial damage. Probable cause: Another airplanes total loss of wheel brakes while taxing which resulted in the pilot of the other aircraft colliding with a standing aircraft. Contributing to the accident was the other airplanes…
- [NTSB DFW08RA232](https://openairdocs.org/ntsb/DFW08RA232), Sep 15, 2008: Cessna 421B (N7560Q), Ojinaga, Mexico, substantial damage, 4 fatal
- [NTSB LAX08LA251](https://openairdocs.org/ntsb/LAX08LA251), Jul 31, 2008: Cessna TU206E (N1499M), Murrieta, CA, substantial damage. Probable cause: A malfunction of the flight control system and loss of engine power for undetermined reasons.
- [NTSB NYC08LA204](https://openairdocs.org/ntsb/NYC08LA204), Jun 2, 2008: Cessna 421C (N49DD), Greenville, NC, substantial damage. Probable cause: The malfunction and premature retraction of the landing gear for undetermined reasons.
- [NTSB SEA07CA224](https://openairdocs.org/ntsb/SEA07CA224), Aug 8, 2007: Cessna 421B (N968J), Oceanside, CA, substantial damage. Probable cause: The collapse of the right main landing gear during the landing roll for undetermined reason, which resulted in a loss of directional control and collision with a fence.
- [NTSB CHI07LA154](https://openairdocs.org/ntsb/CHI07LA154), May 23, 2007: Cessna 421 (N4082L), Chesterfield, MO, substantial damage. Probable cause: Maintenance personnel failed to comply with an Airworthiness Directive which resulted in the total failure of the starter adapter gear teeth and the crankshaft gear teeth and the pilot failed to…
- [NTSB SEA07LA055](https://openairdocs.org/ntsb/SEA07LA055), Jan 30, 2007: Cessna 421 (N4584L), Pocatello, ID, substantial damage. Probable cause: The separation of the bolt that attaches the elevator trim tab actuator rod to the elevator trim tab horn, resulting in violent flutter of the elevator, and eventually to the separation of the…

All 332: https://openairdocs.org/engine/continental-gtsio-520-c/ntsb.md

## FAA accident and incident reports (650, newest 50)

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 20260619006259I](https://openairdocs.org/incident/20260619006259I), Jun 19, 2026: Cessna 404 (N502RA), Havre, MT, Minor damage. On June 19, 2026 at 8:20AM local time a Cessna 404 was involved in a gear up landing at Havre airport khvr in Havre Montana. The pilot admitted to not properly…
- [Incident 20260514007849I](https://openairdocs.org/incident/20260514007849I), May 14, 2026: Cessna 320E (N320VC), Middlefield, OH, Minor damage. The aircraft main and nose landing gear failed to extend. The pilot landed the aircraft in the grass.
- [Accident 20260419009749A](https://openairdocs.org/incident/20260419009749A), Apr 19, 2026: Cessna 401B (N122AT), Land O Lakes, FL, Destroyed, 1 fatal. On April 19, 2026, about 0834 eastern daylight time, a Cessna 401B took off from runway 32. During the initial climb, the airplane reached about 100 ft AGL at…
- [Accident 20260327006249A](https://openairdocs.org/incident/20260327006249A), Mar 27, 2026: Cessna 421B (N799TF), Sedona, AZ, Substantial damage. During the pre-landing checks, the pilot observed three green landing gear indication lights, indicating all three landing gear assemblies were down and…
- [Incident 20251124019649I](https://openairdocs.org/incident/20251124019649I), Nov 24, 2025: Cessna T210F (N6743R), Port Aransas, TX, Minor damage. [privacy data omitted] A Cessna 210 being operated under part 91 by the [privacy data omitted] and pilot in command landed with the gear retracted at kras Port…
- [Accident 20251118016389A](https://openairdocs.org/incident/20251118016389A), Nov 18, 2025: Cessna 401A (N6255Q), Fremont, NC, Substantial damage. The pilot was conducting aerial surveillance when they experienced a dual engine failure after switching from the auxillary fuel tanks to the main fuel tanks…
- [Incident 20241003021939I](https://openairdocs.org/incident/20241003021939I), Oct 3, 2024: Cessna 421B (N77EP), Greensboro, GA, Minor damage. At approximately 09:50 am local time, on October 3, 2024 a Cessna 421 received minor damage after veering off the taxiway and coming to rest in ditch adjacent…
- [Accident 20240915012289A](https://openairdocs.org/incident/20240915012289A), Sep 15, 2024: Cessna T207 (N90193), St. Mary'S, AK, Destroyed, 4 fatal. Aircraft departed bet (bethel, AK) in marginal VFR conditions, continued the flight into IMC conditions and subsequently crashed into the side of a hill,…
- [Incident 20240718021979I](https://openairdocs.org/incident/20240718021979I), Jul 18, 2024: Cessna 414 (N1621T), Manitowish Wate, WI, Minor damage. Pilot stated that during the landing 3 deer ran in front of the plane the pilot was able to miss two of the deer but the third deer tried to stop and slid…
- [Accident 20240607009049A](https://openairdocs.org/incident/20240607009049A), Jun 7, 2024: Beech V35A (N150WR), Arvada, CO, Destroyed, 1 fatal. On June 7, 2024, about 0930 mountain daylight time, a Beech V35A airplane was destroyed when it was involved in an accident near Arvada, Colorado. The pilot…
- [Accident 20231213020019A](https://openairdocs.org/incident/20231213020019A), Dec 13, 2023: Cessna T210F (N6789R), Sapulpa, OK, Substantial damage. Pilot stated, " departed tulsa riverside airport (krvs) westbound heading 230 at approx 1720. Leveled off at 3500 MSL, after about 1 minute the engine lost all…
- [Accident 20231111020669A](https://openairdocs.org/incident/20231111020669A), Nov 11, 2023: Cessna 421B (N977SM), Lake City, FL, Minor damage. Pilot statement revealed that after rotation and initial climb-out, he believes he experienced a weather anomaly such as a microburst that caused a loss of…
- [Incident 20231022016329I](https://openairdocs.org/incident/20231022016329I), Oct 22, 2023: Cessna T210F (N6103R), Wallace, NC, Minor damage. On the evening of October 22, the pilot in command was practicing landings at acz airport using rw 9 with 3 passengers on board. He reported that he was aiming…
- [Incident 20230825011789I](https://openairdocs.org/incident/20230825011789I), Aug 25, 2023: Cessna 421B (N214DF), Ypsilanti, MI, Minor damage. After getting fueled on the ramp, called for taxi and was given instruictions. As the plane moved forward the left main gear collapsed.
- [Accident 20230624010359A](https://openairdocs.org/incident/20230624010359A), Jun 24, 2023: Cessna 421 (N123SM), Rockport, TX, Substantial damage. [privacy data omitted] Serial number 421-0193 a Cessna 421 departed corpus christi (kcrp) with a destination to houston (k''') on a part 91 [privacy data…
- [Incident 20230420004599I](https://openairdocs.org/incident/20230420004599I), Apr 20, 2023: Cessna T210F (N10GM), Titusville, FL, Minor damage. On 04/20/2023 [privacy data omitted] a Cessna T210 was attempting to land at ktix with one sole onboard when the nose landing gear failed to lower. The pilot…
- [Accident 20221208019979A](https://openairdocs.org/incident/20221208019979A), Dec 8, 2022: Cessna TP206A (N30WL), Maricopa, AZ, Substantial damage. On December 8, 2022, at approximately 1356 MDT, [privacy data omitted], a Cessna aircraft model TP206A, single engine airplane, [privacy data omitted], was on…
- [Incident 20221119019259I](https://openairdocs.org/incident/20221119019259I), Nov 19, 2022: Cessna 421B (N111TL), Farmingdale, NY, Minor damage. On 11/19/2022, while taxiing to rwy 32 @ 1333Z. [privacy data omitted] Reached out to ground control & told them they needed assistance and needed to be towed…
- [Accident 20220716019419A](https://openairdocs.org/incident/20220716019419A), Jul 16, 2022: Cessna 421B (N21GF), Riverdale, NE, Substantial damage. [privacy data omitted] Departed goodland Kansas after taking on 50 gallons of fuel in route to Riverdale Nebraska (43NE). On a northern approach, the pilot…
- [Accident 20220715012279A](https://openairdocs.org/incident/20220715012279A), Jul 15, 2022: Cessna T210F (N6195R), Thompson, NY, Destroyed. Approximately 12 minutes after takeoff from sussex county NJ airport aircraft N6915R a Cessna 210-T crash landed with landing gear retracted, on county rt 42…
- [Incident 20220613020499I](https://openairdocs.org/incident/20220613020499I), Jun 13, 2022: Cessna 421B (N780JC), Burnsville, NC, Minor damage. On Monday June 13, 2022, at approximately 1230 EST, [privacy data omitted], a Cessna 421B, departed the runway during departure roll from mountain air airport…
- [Incident 20220301003049I](https://openairdocs.org/incident/20220301003049I), Mar 1, 2022: Cessna 421B (N421WD), Crows Landing, CA, Minor damage. The pilot was enroot to san martin (E16), and the front gear malfunctioned. The pilot had an indication that the front gear was not locking. He was able to…
- [Accident 20211121019749A](https://openairdocs.org/incident/20211121019749A), Nov 21, 2021: Cessna T310R (N310JA), Chadron, NE, Destroyed, 3 fatal. On Sunday November 21, 2021 at 1919 MST, N310JA, a Cessna T310R, departed Chadron municipal airport (kcdr) runway 30, in Chadron, Nebraska with one pilot and…
- [Accident 20211109019179A](https://openairdocs.org/incident/20211109019179A), Nov 9, 2021: Beech V35 (N87565), Cedar Key, FL, Minor damage. On Tuesday, November 9, 2021, a Beech V35, registered as N87565, serial number D-8490, was involved in an incident in the vicinity of George T Lewis Airport…
- [Accident 20210727012969A](https://openairdocs.org/incident/20210727012969A), Jul 27, 2021: Cessna T210F (N6162R), Peyton, CO, Substantial damage. On July 27, 2021 at approximately 0845 am local time N6162R, a Cessna 210T, crash landed through three fences on private property about 1NM south of Meadow…
- [Accident 20210709010519A](https://openairdocs.org/incident/20210709010519A), Jul 9, 2021: Cessna T210G (N6856R), Missoula, MT, Substantial damage. The PIC failed to lower the landing gear during approach to the Missoula International Airport on July 9, 2021. The gear up landing caused substantial damage…
- [Incident 20210115004439I](https://openairdocs.org/incident/20210115004439I), Jan 15, 2021: Cessna T210F (N6789R), Stillwater, OK, Minor damage. Pilot was taxiing from ramp-A2-A-B pilot attempted a right turn on taxiway b from a. pilot states a gust of wind pushed the plane off the south edge of taxi…
- [Incident 20201214017539I](https://openairdocs.org/incident/20201214017539I), Dec 14, 2020: Cessna T210K (N9432M), Valparaiso, IN, Minor damage. Who:[privacy data omitted] When: 12/14/2020 21:25 z Where: Valparaiso airport (vpz) Valparaiso, Indiana What: a student pilot was sole occupant in a Cessna 210…
- [Incident 20200709005199I](https://openairdocs.org/incident/20200709005199I), Jul 9, 2020: Cessna 401A (N69RH), Thompsonville, MI, Minor damage. The pilot stated he was distracted by the beauty of the calm evening and simply forgot to put the gear down. T The gear warning horn sounded as he touched…
- [Incident 20200510007449I](https://openairdocs.org/incident/20200510007449I), May 10, 2020: Cessna 320D (N372J), Pendleton, OR, Minor damage. During rollout, the pilot applied brakes and the right main landing gear collapsed. The aircraft right wing contacted the ground and the aircraft departed the…
- [Accident 20190929018389A](https://openairdocs.org/incident/20190929018389A), Sep 29, 2019: Cessna 421 (N731PF), Deland, FL, Destroyed, 3 fatal. Aircraft departed Deland airport on a local flight with one pilot and two passengers. About 25 minutes after takeoff aircraft crashed into the woods. During…
- [Accident 20190918013309A](https://openairdocs.org/incident/20190918013309A), Sep 18, 2019: Beech V35 (N5438U), London, OH, Destroyed, 1 fatal. Private pilot departed his personal airfield near piqua Ohio at approximately 1100Z enroute for kuyf (Madison County Airport, London Ohio). Video evidence…
- [Incident 20190808013509I](https://openairdocs.org/incident/20190808013509I), Aug 8, 2019: Cessna 421B (N555MY), Oxford, CT, Minor damage. Pilot stated that he was taxing his aircraft to the ramp in front restaurant to have lunch and was unfamiliar with the parking area, as he attempted to park in…
- [Incident 20190711009849I](https://openairdocs.org/incident/20190711009849I), Jul 11, 2019: Cessna 421C (N421DE), Milwaukee, WI, Minor damage. On July 11, 2019, at approximately 18:30 local time, aircraft N421DE a Cessna 421 on a part 91 flight with the pilot and two passengers landed at Timmerman…
- [Incident 20190322006219I](https://openairdocs.org/incident/20190322006219I), Mar 22, 2019: Cessna 340 (N224RR), Fort Worth, TX, Minor damage. On March 22, 2019 at approximately 1520 local time, a Cessna 340, registration number N224RR, owned by metroplex flight services LLC, encountered a landing…
- [Accident 20190317001529A](https://openairdocs.org/incident/20190317001529A), Mar 17, 2019: Cessna 421B (N424TW), Plain City, OH, Destroyed, 1 fatal. On March 17, 2019, about 1745 eastern daylight time, a Cessna 421B airplane, N424TW Impacted terrain near Plain City, Ohio. The commercial rated pilot, sole…
- [Incident 20190301000689I](https://openairdocs.org/incident/20190301000689I), Mar 1, 2019: Cessna 401A (N386H), Fairbanks, AK, Substantial damage. PIC reports while departing fai in aircraft, during climbout, panel lights grew bright, an electrical smell became apparent, and possibl smoke in cock pit was…
- [Incident 20181208023379I](https://openairdocs.org/incident/20181208023379I), Dec 8, 2018: Cessna 421B (N1944G), Palm Springs, CA, No damage. Aircraft N1944G lost power on the right engine at altitude, was unable to restore power, secured engine and made an unscheduled landing at Palm Springs Airport…
- [Accident 20180701008979A](https://openairdocs.org/incident/20180701008979A), Jul 1, 2018: Cessna 421B (N7625Q), Clifton, TX, Substantial damage. On July 1, 2018 at approximately 1040 CDT, a Cessna 421B, N7625Q, [privacy data omitted] had an accident at Clifton municipal airport/isenhower field (7F7).…
- [Incident 20180513005339I](https://openairdocs.org/incident/20180513005339I), May 13, 2018: Cessna T210K (N2210C), Ridgeland, SC, Substantial damage. Aircraft N2210C (Cessna T210K sn: 21059459) pilot failed to lower landing grear, landed gear up at Ridgeland airport (K3J1) on may 13, 2018 @ 2358Z
- [Incident 20171103018199I](https://openairdocs.org/incident/20171103018199I), Nov 3, 2017: Cessna T310Q (N7527Q), Gainesville, FL, Minor damage. Pilot picked up N7527Q from deland municipal airport (kded) after paint work. After takeoff, pilot heard loud noise as he raised the gear even though gear…
- [Incident 20171011016429I](https://openairdocs.org/incident/20171011016429I), Oct 11, 2017: Cessna 421B (N4MU), New Orleans, LA, Minor damage. N4MU was cleared to land on 36L. All checks were completed and the aircraft landed normally. On the roll-out the aircraft was slowed using nirmal braking and…
- [Incident 20170824017999I](https://openairdocs.org/incident/20170824017999I), Aug 24, 2017: Cessna 421B (N8017Q), Amarillo, TX, Minor damage. On August 24, 2017, at 2100 hrs, a Cessna 421 aircraft bearing registration number N-8017Q, registered to private individual, landed long on approach and…
- [Incident 20170824017339I](https://openairdocs.org/incident/20170824017339I), Aug 24, 2017: Cessna T310Q (N7714Q), Marion, IL, Minor damage. On August 14, 2017, about 1312 central daylight time, Cessna T310Q, N7714Q, piloted by a private pilot, was damaged when the left landing gear collapsed on…
- [Incident 20170722012089I](https://openairdocs.org/incident/20170722012089I), Jul 22, 2017: Cessna 421B (N770CS), Pensacola, FL, Minor damage. Aircraft landed and taxied off of active runway onto taxiway d. once on the taxiway, the right engine quit. Engine was restarted and the crew continued to…
- [Accident 20170622021759A](https://openairdocs.org/incident/20170622021759A), Jun 22, 2017: Cessna 421B (N380AL), Carlsbad, CA, Substantial damage. After what was reported as a normal landing, during roll-out, the right landing gear collapsed. The pilots stated that the aircraft was only travelling at…
- [Accident 20170304001419A](https://openairdocs.org/incident/20170304001419A), Mar 4, 2017: Cessna 421B (N421KL), Canton, GA, Destroyed, 1 fatal. Pilot bought aircraft on 3/3. Pilot got checked out 3/3 by CFI in rvs. Pilot departed at 2030 from rvs. Pilot arrived cni @ 0010. Pilot crashed aircraft on…
- [Incident 20170301003079I](https://openairdocs.org/incident/20170301003079I), Mar 1, 2017: Cessna 421B (N5996M), Kenosha, WI, Minor damage. After landing in Kenosha, pilot parked, refueled, loaded medical passenger and began to taxi for departure. Pilot was attempting to exit the ramp at the…
- [Accident 20161106020989A](https://openairdocs.org/incident/20161106020989A), Nov 6, 2016: Cessna T210F (N6702R), Twentynine Palm, CA, Substantial damage. Aircraft r/h gear collapsed on landing at Crosswinds Airport(2CA3), 29 palms, CA.
- [Incident 20160913017679I](https://openairdocs.org/incident/20160913017679I), Sep 13, 2016: Cessna T210H (N6912R), Gunnison, CO, Minor damage. On 9/13/2016 at approximately 1400 local, N6912R landed gear up on runway 24 at the Gunnison-Crested Butte Regional Airport (guc). Weather was VFR and runway…

All 650: https://openairdocs.org/engine/continental-gtsio-520-c/incidents.md

## Service difficulty reports (44)

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

- [SDR 17GR159B092401](https://openairdocs.org/sdr/17GR159B092401), Sep 22, 2015: GOVERNOR. FAILED. AFTER ROTATION PROPELLER WENT INTO FEATHER AND ENGINE SHUT DOWN WITHOUT ACTION ON THE PART OF THE PILOT. GOVERNOR WAS FOUND TO BE BEYOND ECONOMICAL REPAIR. PROP
- [SDR HYIA20150729003](https://openairdocs.org/sdr/HYIA20150729003), Jul 28, 2015: CONTROL CABLE. DISCONNECTED. PILOT REPORTED NO PROPELLER RPM CONTROL THROUGH LEFT PROPELLER LEVER. FOUND LEFT PROPELLER CONTROL CABLE DISCONNECTED AT GOVERNOR. CONNECTED WITH PROPER HARDWAR
- [SDR 2014FA0000721](https://openairdocs.org/sdr/2014FA0000721), Dec 25, 2014: SCREW. SHEARED. RPM AND MANIFOLD PRESSURE STARTED FLUCTUATING FOR THE RT ENGINE. WHITE SMOKE FROM TURBO CHARGER VENTS WAS NOTED AS WELL AS OIL STREAKS NOTED. OIL PRESSURE DROPP
- [SDR BGJA2014042300002](https://openairdocs.org/sdr/BGJA2014042300002), Apr 3, 2014: ALTERNATOR. FAILED. THE ACFT HAD TOTAL ELECTRICAL FAILURE DURING FLIGHT, DUE TO BOTH CHARGING SYSTEMS FAILING TOGETHER. RT ALTERNATOR FAILED DURING CRUISE, SHORTLY AFTER LT ALTERNA
- [SDR 2012FA0000596](https://openairdocs.org/sdr/2012FA0000596), Aug 24, 2012: CLAMP. CRACKED. TURBOCHARGER TURBINE TO TAILPIPE V BAND CLAMP, FOUND TO HAVE A 3" LONG CRACK ALONG THE OUTER PERIMETER OF THE V BAND. CRACK SEPARATION WAS LESS THAN .0625" AT T
- [SDR 2010FA0000522](https://openairdocs.org/sdr/2010FA0000522), May 21, 2010: BLADE. LOOSE. ON CLIMB OUT, ACFT BEGAN TO SHAKE, IT BEGAN TO SHAKE WORSE AS THE FLIGHT PROGRESSED. FLIGHT LANDED SAFELY AT THE INTENDED AIRPORT. AFTER INSPECTION IT WAS REVEA
- [SDR T9ZR725Y4370/40](https://openairdocs.org/sdr/T9ZR725Y4370%2F40), Dec 9, 2009: BLADE. LEAKING. PROP WAS OBSERVED TO BE LEAKING GREASE FROM TWO BLADE SHANK AREAS. SPINNER WAS REMOVED FOR INSP AND ALL 3 BLADES APPEAR TO BE LEAKING GREASE. ONE BLADE WAS OBSE
- [SDR T9ZR725Y4370/41](https://openairdocs.org/sdr/T9ZR725Y4370%2F41), Dec 9, 2009: BLADE. DAMAGED. PROP WAS OBSERVED TO BE LEAKING GREASE FROM 2 BLADE SHANK AREAS. SPINNER WAS REMOVED FOR INSP AND ALL 3 BLADES APPEAR TO BE LEAKING GREASE. 1 BLADE WAS OBSERVED
- [SDR 2009FA0000845](https://openairdocs.org/sdr/2009FA0000845), Oct 6, 2009: CYLINDER. CRACKED. REPAIRED CYLINDER FOUND TO BE CRACKED SPARK PLUG TO INJECTOR.
- [SDR 2009FA0000844](https://openairdocs.org/sdr/2009FA0000844), Sep 19, 2009: CYLINDER. CRACKED. REPAIRED CYLINDER FOUND TO BE CRACKED SAME PLACE AS OTHERS, SPARK PLUG TO INJECTOR.
- [SDR 2009FA0000843](https://openairdocs.org/sdr/2009FA0000843), Apr 17, 2009: CYLINDER. CRACKED. REPAIRED CYLINDER FOUND TO BE CRACKED
- [SDR 2009FA0000841](https://openairdocs.org/sdr/2009FA0000841), Dec 5, 2008: CYLINDER. CRACKED. 12/25/08 6 CRACKED TCM CYLINDERS WERE REPLACED.
- [SDR D382008F00000](https://openairdocs.org/sdr/D382008F00000), Aug 29, 2008: THRU BOLT. BROKEN. 22.2 HOURS AFTER INSTALLING AN OVERHAULED (ALV9510) ALTERNATOR, THE PILOT CAME TO ME ABOUT A THRU BOLT THAT WAS COMING OUT OF THE ALTERNATOR CASE. THERE WAS ONE
- [SDR TVD2006F00000](https://openairdocs.org/sdr/TVD2006F00000), Mar 30, 2006: CYLINDER. CRACKED. NR 3 CYLINDER ON THE LT ENGINE CRACKED COMPLETELY AROUND THE HEAD, APPROX 1.25 INCHES ABOVE THE BASE OF THE HEAD. THE CRACK WAS COMPLETELY AROUND THE CIRCUMFERA
- [SDR 2006FA0000002](https://openairdocs.org/sdr/2006FA0000002), Jan 4, 2006: CIRCUIT BREAKER. CORRODED. AVIONICS MASTER CIRCUIT BREAKER SWITCH FOUND INTERMITTENT DURING COMPLIANCE WITH AD 2005-20-05, MEB05-1. PN 593-240-101 NOT FOUND IN MFG PARTS MANUAL BUT THIS W
- [SDR TZR2005F00022](https://openairdocs.org/sdr/TZR2005F00022), Jun 10, 2005: CYLINDER. CRACKED. CRACK IS TYPICAL FOR THESE CYLINDERS. RT NR 4. (SW05200509363). (K)
- [SDR TZR2005F00023](https://openairdocs.org/sdr/TZR2005F00023), Jun 10, 2005: CYLINDER. CRACKED. CRACK IS TYPICAL FOR THESE CYLINDERS, RT ENGINE NR 3. (K)
- [SDR TZR2005F00024](https://openairdocs.org/sdr/TZR2005F00024), Jun 10, 2005: CYLINDER. CRACKED. CRACK IS TYPICAL FOR THESE CYLINDERS. RT ENGINE, NR 3. (SW05200509364) (K)
- [SDR TZR2005F00025](https://openairdocs.org/sdr/TZR2005F00025), Jun 10, 2005: CYLINDER. CRACKED. CRACK IS TYPICAL FOR THESE CYLINDERS. RT ENGINE, NR 3 CYL. (SW05200509364) (K)
- [SDR TZR2005F00026](https://openairdocs.org/sdr/TZR2005F00026), Jun 10, 2005: CYLINDER. CRACKED. CRACK IS TYPICAL FOR THESE CYLINDERS, RT ENGINE NR 6 CYLINDER. (SW05200509365) (K)
- [SDR 2005FA0001054](https://openairdocs.org/sdr/2005FA0001054), Apr 14, 2005: ANTENNA. INOPERATIVE. FOUND UPPER UAT ANTENNA UNSERVICEABLE. (K)
- [SDR TZR2005F00017](https://openairdocs.org/sdr/TZR2005F00017), Apr 11, 2005: CYLINDER. CRACKED. CRACKED FROM EXHAUST VALVE TO TOP SPARK PLUG. ECI CYLINDER. (SW05200507950) (K)
- [SDR 2005FA0000517](https://openairdocs.org/sdr/2005FA0000517), Mar 29, 2005: HINGE. MISINSTALLED. AIRCRAFT WAS HERE FOR COMPLETE EXTERIOR REPAINT. AFTER REMOVING RUDDER, COMPLIED WITH MFG MEB004. IT IS JUST A VISUAL INSPECTION, BUT IT DOES REQUIRE REMOVING T
- [SDR 2005FA0000396](https://openairdocs.org/sdr/2005FA0000396), Feb 25, 2005: RIB. CRACKED. DURING AN ANNUAL INSP, NOTED CRACKS IN LT AND RT WING T/E RIBS AT FORWARD END AFT SPAR ATTACHMENT POINT AREAS. AFFECTED RIBS ARE FIRST RIBS IB OF SPOILER SYSTEM
- [SDR 2005FA0000397](https://openairdocs.org/sdr/2005FA0000397), Feb 25, 2005: BULKHEAD. CRACKED. DURING AN ANNUAL INSPECTION, FOUND AFT BULKHEAD OF THE LT WING TIP TANK ASSY. CRACKED THROUGH FROM APPROXIMATE CENTER OF THE IB LIGHTENING HOLE HORIZONTALLY TO 
- [SDR 2004FA0000927](https://openairdocs.org/sdr/2004FA0000927), Dec 21, 2004: BRACKET. MISINSTALLED. COMPLIED WITH MFG MEB 00-4 RUDDER BEARING INSPECTION/REPLACEMENT. FOUND RUDDER LOWER HINGE BEARING BRACKET INSTALLED UPSIDE DOWN FROM FACTORY. REPLACEMENT PROCE
- [SDR 2005FA0000125](https://openairdocs.org/sdr/2005FA0000125), Dec 2, 2004: CRANKSHAFT. BROKEN. CRANKSHAFT BROKE AT NR 2 MAIN. NO SIGNS OF OIL STARVATION. NO SIGNS OF CASE FRETTING. CASE WAS DAMAGED BEYOND REPAIR. (K)
- [SDR 2004FA0000355](https://openairdocs.org/sdr/2004FA0000355), Apr 27, 2004: CYLINDER HEAD. CRACKED. AIRCRAFT NDT SERVICE WAS CONTRACTED TO VERIFY CRACKS IN THE ENGINE CYLINDER HEADS BETWEEN THE SPARK PLUG AND FUEL INJECTOR MOUNTING BOSS. AN EDDY CURRENT EXAMIN
- [SDR 2003FA0001035](https://openairdocs.org/sdr/2003FA0001035), Sep 20, 2003: BEARING. DESTROYED. AIRCRAFT LANDED EXITED ONTO TAXIWAY, FELT VIBRATION IN NOSE OF AIRCRAFT, FELL NOSE FIRST ONTO TAXIWAY. THE BEARINGS IN NOSE WHEEL FROZE AND SHEARED AXIAL. LANDI
- [SDR 2003F00283](https://openairdocs.org/sdr/2003F00283), Apr 1, 2003: GEAR. BROKEN. REMOVED RIGHT INOPERATIVE ALTERNATOR FOR REPAIR AND NOTED. CRANKCASE DAMAGED, ALTERNATOR FACE GEAR, BROKEN AND LOOSE. FACE GEAR ATTACH BOLTS, DAMAGED AND LOOSE.
- [SDR 2002FA0001271](https://openairdocs.org/sdr/2002FA0001271), Oct 31, 2002: WINDSHIELD. FAILED. WHILE AT CRUISE ALT FL240, PILOTS FRONT WINDSHIELD DEPARTED THE AIRCRAFT ALONG WITH PART OF THE INSTRUMENT GLARE SHIELD AND PILOTS SUN VISOR. LAB EXAM OF WINDSH
- [SDR TXH2002F00000](https://openairdocs.org/sdr/TXH2002F00000), Aug 15, 2002: DOWNLOCK SWITCH. FAILED. PILOT REPORTED LT MAIN GEAR DOWN AND LOCKED BUT NO GEAR DOWN INDICATION. FOUND DOWN LOCK SWITCH FAULTY. REPLACED SWITCH AND COPLETED RETRACTION TEST SATISFACTOR
- [SDR 2002FA0000656](https://openairdocs.org/sdr/2002FA0000656), May 8, 2002: INSULATOR. BURNED. ON REPLACING LEFT WING LOCKER FUEL CELL, DISCOVERED (PN 5656006-2), FIREWALL FIRE SCREEN COATING BURNED THROUGH BEHIND TURBOCHARGER. REMOVED RIGHT NACELLE TOP S
- [SDR MHJ2002F00000](https://openairdocs.org/sdr/MHJ2002F00000), Jan 28, 2002: TRANSFER PUMP. INOPERATIVE. TRANSFER PUMP, INOPERATIVE.
- [SDR 2002FA0000665](https://openairdocs.org/sdr/2002FA0000665), Nov 20, 2001: STRUCTURE. CORRODED. DURING INSPECTION OF THE WING NACELLE BAGGAGE COMPARTMENT STRUCTURE CORROSION WAS DISCOVERED UNDER THE TRIM AND CARPETS. UPON REMOVAL OF THE NACELLE BAGGAGE COM
- [SDR IBU2001F00000](https://openairdocs.org/sdr/IBU2001F00000), Nov 19, 2001: BOLT. SHEARED. ALTERNATOR CASE THIN BOLTS ARE SHEARING. BOLTS THAT RECOVERED FROM ENGINE COWLING, SHOWS SIGNS OF STRETCHING. BOLTS POSSIBLE OVER TORQUED FROM FACTORY.
- [SDR 2001FA0000462](https://openairdocs.org/sdr/2001FA0000462), Oct 17, 2001: CYLINDER. MALFUNCTIONED. LEFT ENGINE EXPERIENCED A VIBRATION. PILOT ELECTED TO LAND . REPLACED NR 2 CYLINDER. CLEANED VALVE GUIDES ON REMAINING CYLINDERS. REPLACED SPARK PLUG ON NR 1 CY
- [SDR VDQ2001F00000](https://openairdocs.org/sdr/VDQ2001F00000), Oct 12, 2001: CYLINDER. CRACKED. ALL 6 CYLINDER CRACKED AT 781.6 HOURS SINCE NEW. SERIAL NUMBERS: 52A0016149, 52A0016150, 52A0016201, 52A0016202, 52A0016215, 52A0016217
- [SDR VDQ2001F00001](https://openairdocs.org/sdr/VDQ2001F00001), Oct 12, 2001: CYLINDER. CRACKED. ALL 6 CYLINDERS CRACKED AT 781.6 HOURS SINCE NEW. SERIAL NUMBERS: 52A0016149, 52A0016150, 52A0016201, 52A0016202, 52A0016215, 52A0016217.
- [SDR VDQ2001F00003](https://openairdocs.org/sdr/VDQ2001F00003), Oct 12, 2001: CYLINDER. CRACKED. ALL 6 CYLINDERS CRACKED AT 781.6 HOURS SINCE NEW. SERIAL NUMBERS: 52A0016149, 52A0016150, 52A0016201, 52A0016202, 52A0016215, 52A0016217.
- [SDR 20010511CW010](https://openairdocs.org/sdr/20010511CW010), May 11, 2001: SPAR CAP. CRACKED. DURING AN ANNUAL INSPECTION, A CRACK APPROX 3 INCHES LONG WAS FOUND ON LEFT WING AFT SPAR, UPPER AFT CAP. BELOW BAGGAGE RACELLE.
- [SDR AU990862](https://openairdocs.org/sdr/AU990862), Aug 12, 1999: SWITCH. FAULTY. (AUS) COMBUSTION HEATER FAULTY. AIR VALVE SWITCH JAMMED IN THE ON POSITION. VENT MOTOR MAIN POSITIVE LEAD NOT LOCKED TO THE POWER SOURCE CAUSING ARCING ON THE P
- [SDR AU970724](https://openairdocs.org/sdr/AU970724), Jun 30, 1997: FITTING. CORRODED. (AUS) UPPER RH FUSELAGE WING ATTACHMENT FITTING CONTAINED EXFOLIATION CORROSION ON LOWER SURFACE
- [SDR 95ZZZX1456](https://openairdocs.org/sdr/95ZZZX1456), Feb 10, 1995: STARTER ADAPTER. FAILED. AIRCRAFT LANDED AFTER DARK 2-9-95, WITH THE LEFT ENGINE SHUT DOWN. FOUND STARTER ADAPTER HAD TWO BROKEN TEETH AND METAL THROUGHOUT THE ENGINE. VERY ROUGH AIRCRA

## 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 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 SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [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 SE1004SW](https://openairdocs.org/stc/SE1004SW): Installation of alternator braces. Signature Flight Support 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 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
- [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

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