# Continental IO-520-M - Type: Engine model (FAA registry) - Registry code: 17233 - Manufacturer (registry): CONT MOTOR - Model: IO-520-M - Engine type: Reciprocating - Power: 285 hp - Data sheet: [TCDS E5CE](https://openairdocs.org/tcds/E5CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 2 registered aircraft - Page: https://openairdocs.org/engine/continental-io-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 2023-17-04](https://openairdocs.org/ad/2023-17-04): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Oct 26, 2023 - [AD 2023-05-16](https://openairdocs.org/ad/2023-05-16): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 147 more. Effective Mar 15, 2023 - [AD 2023-02-12](https://openairdocs.org/ad/2023-02-12): Engine Air Intake System · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Feb 17, 2023 - [AD 2016-16-12](https://openairdocs.org/ad/2016-16-12): Cylinder assemblies · Continental Motors LTSIO-520-AE, TSIO-520-A, TSIO-520-AE and 89 more. Effective Sep 15, 2016 - [AD 2014-05-29](https://openairdocs.org/ad/2014-05-29): SAP replacement parts manufacturer approval (PMA) investment cast cylinder assemblies · Continental Motors TSIO-520-A, TSIO-520-AE, TSIO-520-AF and 55 more. Effective Apr 25, 2014 - [AD 2012-03-06](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 2009-19-07](https://openairdocs.org/ad/2009-19-07): EQ3 cylinders · Continental Motors IO-470-C, IO-470-D, IO-470-E and 72 more. Effective Oct 7, 2009 - [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007 - [AD 2004-08-10](https://openairdocs.org/ad/2004-08-10): Serial-numbered (SN) cylinders · Modify Teledyne Continental TSIO-520-NB engine (RAM Aircraft Limited Partnership STC SE09104SC or 4 others). Effective May 5, 2004 - [AD 2000-23-21](https://openairdocs.org/ad/2000-23-21): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 164 more. Effective Dec 12, 2000 - [AD 99-19-01](https://openairdocs.org/ad/99-19-01): No. 2 and No. 5 Crankshaft Inspections · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Sep 30, 1999 - [AD 97-26-17](https://openairdocs.org/ad/97-26-17): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 90 more. Effective Jan 23, 1998 - [AD 96-12-22](https://openairdocs.org/ad/96-12-22): Full Flow Engine Oil Adapter · Bellanca CH-300 Pacemaker, 120, 140 and 361 more. Effective Jul 31, 1996 - [AD 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 1995 - [AD 93-16-15](https://openairdocs.org/ad/93-16-15): Fuel Pump Drive Shaft · Continental Motors IO-520-B, IO-520-BA, IO-520-BB and 27 more. Effective Dec 14, 1993 - [AD 93-08-17](https://openairdocs.org/ad/93-08-17): Oil Pick-Up Tube · Continental Motors IO-470-A, IO-470-C, IO-470-D and 104 more. Effective Aug 23, 1993 - [AD 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993 - [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991 - [AD 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 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981 - [AD 80-01-04](https://openairdocs.org/ad/80-01-04): Cylinder Holddown Flange Assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 44 more. Effective Jan 25, 1980 - [AD 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 98-01-08](https://openairdocs.org/ad/98-01-08): Exhaust Roller Rocker Arm · Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW) - [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 2009-16-03](https://openairdocs.org/ad/2009-16-03) (historical): Cylinder assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 55 more. Effective Sep 9, 2009 - [AD 2000-08-51](https://openairdocs.org/ad/2000-08-51) (historical): Crankshaft · Teledyne Continental Motors IO-360-A, IO-360-AB, IO-360-B and 158 more - [AD 94-14-12](https://openairdocs.org/ad/94-14-12) (historical): Octane Aviation Gasoline · Teledyne Continental Motors A-65-8, C85-12, E185-11 and 68 more - [AD 99-09-17](https://openairdocs.org/ad/99-09-17) (historical): Crankshaft · Teledyne Continental Motors IO-470-A, IO-470-C, IO-470-D and 114 more ## Information bulletins (advisory) (11) - [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020 - [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT Alternator Drive Coupling. Issued Jun 20, 2018 - [SAIB NE-17-11](https://openairdocs.org/saib/NE-17-11): POWERPLANT Engine damage as a result of kickback. Issued May 10, 2017 - [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016 - [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013 - [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012 - [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009 - [SAIB NE-10-07](https://openairdocs.org/saib/NE-10-07): Reciprocating Engine Cylinder: Identification Information for Superior Air Parts, PMA Cylinder Heads for Teledyne Continental Motors (TCM) IO-520, TSIO-520,and IO-550 Series Engines.. Issued Nov 2, 2009 - [SAIB NE-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009 - [SAIB NE-07-09R1](https://openairdocs.org/saib/NE-07-09R1): Periodic Inspections of ECi Cylinder Assemblies for Cracks in the Aluminum Head. Issued Mar 21, 2007 - [SAIB NE-02-41](https://openairdocs.org/saib/NE-02-41): . Issued Aug 8, 2002 ## Registered aircraft (2) - [N101MT](https://openairdocs.org/aircraft/N101MT): [Allman Air LLC](https://openairdocs.org/faa-owner/ALLMAN%20AIR%20LLC), [Blackstone, VA](https://openairdocs.org/faa-place/VA/Blackstone), built 1969, S/N P20600626 - [N310ND](https://openairdocs.org/aircraft/N310ND): [Moroney Aviation LLC](https://openairdocs.org/faa-owner/MORONEY%20AVIATION%20LLC), [Chugiak, AK](https://openairdocs.org/faa-place/AK/Chugiak), built 1975, S/N 310R0128 ## NTSB investigations (3) 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 DEN07CA087](https://openairdocs.org/ntsb/DEN07CA087), Apr 27, 2007: Cessna 310R (N3700G), Hatch, NM, substantial damage. Probable cause: The pilot's inattentiveness to the fuel flow and fuel selector valve position resulting in fuel starvation. Contributing factors were the pilot's failure to follow proper engine failure procedures,… - [NTSB CHI98LA113](https://openairdocs.org/ntsb/CHI98LA113), Mar 26, 1998: Cessna 310R (N3700G), Sioux Falls, SD, substantial damage. Probable cause: the pilot's failure to extend the landing gear for landing. Factors associated with the accident were: the crosswind, and the pilot not following his normal habit pattern of lowering the landing gear… - [NTSB NYC86LA110](https://openairdocs.org/ntsb/NYC86LA110), Apr 22, 1986: Cessna C-310R (N1909G), Buffalo, NY, substantial damage ## FAA accident and incident reports (8) 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 20070426005949A](https://openairdocs.org/incident/20070426005949A), Apr 26, 2007: Cessna 310R (N3700G), Hatch, NM, Substantial damage. (-23) On April 26, 2007 at 19:15 mdst, a Cessna 310R, N3700G operated by aero charter and transport (N3BA) lost power on one engine and made an off-airport… - [Accident 19980326013539A](https://openairdocs.org/incident/19980326013539A), Mar 26, 1998: Cessna 310R (N3700G), Sioux Falls, SD, Substantial damage. Landed gear up. Pilot error. (.4)the pilot reported that due to the gusty crosswind conditions, he made a single 180 degree turn from downwind to final during… - [Incident 19970703016599I](https://openairdocs.org/incident/19970703016599I), Jul 3, 1997: Cessna 310R (N3700G), Omaha, NE, Minor damage. Nose gear collapsed landing. Had unsafe light on approach. Used manual. Showed safe. Bellcrank had failed. - [Incident 19960913032459I](https://openairdocs.org/incident/19960913032459I), Sep 13, 1996: Cessna 310R (N3700G), Omaha, NE. Narrative: on September 12, 1996, approximately 1950 CST, Cessna 310R N3700G, experienced an unsafe left hand gear indication on approach to the sioux city… - [Incident 19870116078689I](https://openairdocs.org/incident/19870116078689I), Jan 16, 1987: Cessna 310R (N1909G), South Burlingto, VT, Minor damage. Engine started. Brakes set. Accelerated. Failed to stop engine. Struck parked aircraft. Mixture control was frozen. - [Accident 19860422014739A](https://openairdocs.org/incident/19860422014739A), Apr 22, 1986: Cessna 310R (N1909G), Buffalo, NY, Substantial damage. The right wing bracket fractured on landing. The aircraft taxied to ramp. Break showed signs of overstress failure. - [Incident 19851217065409I](https://openairdocs.org/incident/19851217065409I), Dec 17, 1985: Cessna 310R (N1909G), Ogdensburg, NY. Right engine shutdown due to frozen throttle cable. Uneventful landing. - [Incident 19800328040119I](https://openairdocs.org/incident/19800328040119I), Mar 28, 1980: Cessna 310R (N1909G), Jamaica, NY. Pilot unable to obtain a down safe light for the left main. Switch acutator bent, not contacting switch. ## Service difficulty reports (187, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR W1XA201806200001](https://openairdocs.org/sdr/W1XA201806200001), Jun 20, 2018: GASKET. COLLAPSED. AFTER TAKE OFF AND IN CLIMB OUT, THE TOWER REPORTED SMOKE TRAILING THE LEFT ENGINE. RETURNED TO DEPARTURE WITHOUT INCIDENT. REMOVED COWL AND FOUND OIL DRIPPING - [SDR CA150107011](https://openairdocs.org/sdr/CA150107011), Jan 7, 2015: MAGNETO. FAILED. (CAN) DURING 200HR INSPECTION OIL LEAK NOTICED ON LH SIDE OF ENGINE. AFTER CLEANING AREA WAS DETERMINED THAT IT WAS THE LH MAG GASKET LEAKING. MAGNETO WAS REMOV - [SDR 2014FA0000144](https://openairdocs.org/sdr/2014FA0000144), Mar 3, 2014: INJECTOR. DIRTY. PILOT REPORTED ROUGH RUNNING ENGINE AND MADE PRECAUTIONARY LANDING. PILOT WAS ABLE TO INFORM MAINTENANCE OF THE CYLINDERS THAT WERE HAVING ISSUES FROM THE ENGIN - [SDR CA130124008](https://openairdocs.org/sdr/CA130124008), Jan 23, 2013: BULKHEAD. CRACKED. (CAN) DURING ANNUAL INSPECTION,THE REAR BULKHEAD WAS FOUND CRACKED AT TOP RT AND LT CORNERS WHERE THE RUDDER CABLES PASS THROUGH. A NEW REAR BULKHEAD WAS ORDERE - [SDR CA130218012](https://openairdocs.org/sdr/CA130218012), Jan 23, 2013: LIFTER. FAILED. (CAN) ENGINE WAS REMOVED FOR REPAIR AFTER FINDING METAL IN THE FILTER. IT WAS DISCOVERED THAT THE 6 INTAKE LIFTERS WERE FAILED OR FAILING. THESE LIFTERS WERE PA - [SDR 2011FA0000585](https://openairdocs.org/sdr/2011FA0000585), Jul 27, 2011: CRANKSHAFT. BROKEN. ACFT LANDED AT AIRPORT WITH RT PROPELLER FEATHERED. PILOT STATED ENGINE QUIT SUDDENLY ABOUT 15 MILES NORTH OF AIRPORT. PILOT AUTHORIZED INSP TO DETERMINE PROBLE - [SDR CA110725008](https://openairdocs.org/sdr/CA110725008), Jul 22, 2011: ENGINE. FAILED. (CAN) AFTER TAKING OFF AND IN CLIMB, PILOT FELT SLIGHT VIBRATION IN LT SIDE OF ACFT. HE CHECKED HIS ENGINE GAUGES AND NOTED THAT THE LT ENGINE HAD NO OIL PRESSU - [SDR CA101004011](https://openairdocs.org/sdr/CA101004011), Oct 1, 2010: CONTROL CABLE. FRAYED. ON COMING INTO LAND, THE FLAPS WERE LOWERED TO 15 DEGREES, THE ACFT MADE A ROLL TO THE LT. PILOT CORRECTED AND LANDED WITHOUT INCIDENT. AME INSPECTED THE FLAP S - [SDR CA090320004](https://openairdocs.org/sdr/CA090320004), Mar 19, 2009: TUBE. SPLIT. (CAN) AFTER LANDING, PILOT NOTICED ACFT DRAGGING TO ONE SIDE. ACFT WAS STOPPED, PILOT GOT OUT AND NOTICED LT TIRE WAS FLAT. MX WENT OUT AND REPLACED WHEEL ASSY. - [SDR 2008FA0000911](https://openairdocs.org/sdr/2008FA0000911), Dec 1, 2008: ROD END. CRACKED. PILOT REPORTED NO LT GEAR DOWN LIGHT AND ALSO HEARD A LOUD BANG WHEN GEAR WAS RETRACTED. PILOT DID SEVERAL FLYBYS FOR MECHANICS ON GROUND, GEAR APPEARED TO BE D - [SDR CA070927001](https://openairdocs.org/sdr/CA070927001), Aug 31, 2007: WHEEL. BROKEN. (CAN) DURING MAINT THE RT MAIN WAS FOUND WITH PART OF THE BEAD MISSING, PILOT SAID THE WHEEL WAS OK PRIOR TO DEPARTURE AND LANDING NORMAL. TOWER ADVISED AND CRE - [SDR 2007FA0000685](https://openairdocs.org/sdr/2007FA0000685), Jul 12, 2007: OIL FILTER. CONTAMINATED. THE ENGINE OIL SYSTEM WAS CONTAMINATED BY OIL FILTER SEAL DEBRIS. (K) ON DISASSEMBLY OF THE ENGINE RUBBER DEBRIS WAS FOUND: IN THE OIL PASSAGE THAT FEEDS THE ST - [SDR CA070511002](https://openairdocs.org/sdr/CA070511002), May 10, 2007: TORQUE TUBE. BROKEN. (CAN) AFTER TAKE-OFF PILOT RETACTED GEAR ALL 3 GREEN LIGHTS WENT OUT AND UNLOCKED LIGHT WAS OUT. RADIO CALL FROM TOWER INFORMED PILOT THAT LT MAIN GEAR WAS NOT - [SDR DFJ2007F00000](https://openairdocs.org/sdr/DFJ2007F00000), Apr 9, 2007: GOVERNOR. MALFUNCTIONED. PROPELLER STARTED TO SURGE ON RT ENGINE DURING CRUISE FLIGHT CONDITIONS. AC WAS LANDED AND THE PROPELLER GOVERNOR WAS REPLACED WITH AN OVERHAULED GOVERNOR. (K) - [SDR CA061019003](https://openairdocs.org/sdr/CA061019003), Oct 18, 2006: BOLT. SHEARED. (CAN) ON LANDING THE MAIN GEAR CAME DOWN AND LOCKED BUT THE NOSE GEAR STAYED UNLOCKED. THE AN5-17A BOLT CONNECTING THE DRAG LINK ASSY TO THE DRAG BRACE TRUSS AS - [SDR AU510001798](https://openairdocs.org/sdr/AU510001798), Dec 12, 2005: SHEAR PIN. FAILED. ELEVATOR ACTUATOR DRIVE SHEAR PINS FAILED. - [SDR AU510001859](https://openairdocs.org/sdr/AU510001859), Dec 12, 2005: BRUSH BLOCK. DAMAGED. ALTERNATOR HAD HIGH RESISTANCE IN BOTH BRUSH BLOCK CONNECTIONS. - [SDR AU510002129](https://openairdocs.org/sdr/AU510002129), Nov 11, 2005: DOWNLOCK. FAULTY. LT AND RT MAIN LANDING GEAR DOWNLOCKS FOUND TO BE IN AN UNSAFE CONDITION. - [SDR DFJ2005F00000](https://openairdocs.org/sdr/DFJ2005F00000), Dec 3, 2004: BELLCRANK. BROKEN. BELLCRANK BROKE DURING GEAR RETRACTION. PROBABLE CAUSE IS DUE TO FATIGUE AND STRESS. SUGGEST REMOVAL OF BELLCRANK AFTER 5,000 HOURS OF OPERATION, DYE CHECK, REI - [SDR CA041119001](https://openairdocs.org/sdr/CA041119001), Nov 12, 2004: SPAR. CRACKED. WHILE DOING A 100HR INSPECTION ON THE AIRCRAFT, AME'S NOTICED BELLY SKIN ON LOWER RT SIDE WRINKLED. FURTHER INSPECTION REVEALED THAT THE WEB SKIN ON THE REAR OF - [SDR XIR2005F00000](https://openairdocs.org/sdr/XIR2005F00000), Nov 2, 2004: BELLCRANK. CORRODED. PART SHOWED SIGNS OF INTERGRANULAR CORROSION AT BRAKE. (K) - [SDR 2004F00416](https://openairdocs.org/sdr/2004F00416), Oct 18, 2004: SKIN. CRACKED. DURING MAINTENANCE WORK ON THE LT CENTER WING LOCKER BAY COMPARTMENT FUEL TANK, MAINTENANCE FOUND A WING SKIN CRACK OF 3.0 INCH AT APPROX WING STATION 60.00 AND - [SDR 4016](https://openairdocs.org/sdr/4016), Jun 23, 2004: MAGNETO. FAILED. IN ROUTE, PILOT NOTICED HI EGT AND ROUGH LT ENGINE, PILOT DID MAG CHECK RT MAGNETO DEAD, CONTINUED APPROACH, LT ENGINE QUIT, LANDED NO PROBLEM. CAUSE UNKNOWN AT - [SDR CA040528008](https://openairdocs.org/sdr/CA040528008), May 11, 2004: PUMP. LEAKING. DURING AIRCRAFT 100 HOURS INSPECTION, THE TECHNICIAN DISCOVERED A BLUE COLORED TRACE OF FUEL ORIGINATING FROM THE FUEL PUMP LOW-METERED ADJUSTMENT SCREW. PRESSU - [SDR AUS20040360](https://openairdocs.org/sdr/AUS20040360), May 5, 2004: OIL SYSTEM. CONTAMINATED. (AUS) METAL CONTAMINATION OF RT ENGINE OIL SYSTEM. THREE PIECES OF 0.812 MM (0.032IN) LOCKWIRE FOUND IN OIL FILTER. TWO MORE PIECES OF LOCKWIRE FOUND IN OIL PRE - [SDR AUS20040154](https://openairdocs.org/sdr/AUS20040154), Mar 3, 2004: TRUNNION. CRACKED. (AUS) NOSE LANDING GEAR TRUNNION CRACKED IN RADIUS LOCATED ON LOWER SIDE OF THE LT ATTACHMENT LUG. CRACK LENGTH APPROXIMATELY 12MM(0.472IN). THE TRUNNION WAS TH - [SDR AUS20040125](https://openairdocs.org/sdr/AUS20040125), Feb 19, 2004: WIRE. MISROUTED. (AUS) WIRING IN BOTH LT AND RT WINGS CONTACTING FUEL VENT LINES LOCATED AT WS 145. PERSONNEL/MAINTENANCE ERROR. - [SDR 0408](https://openairdocs.org/sdr/0408), Jan 13, 2004: BELLCRANK. BROKEN. HAD NO NOSE GEAR DOWN AND LOCK LIGHT, PUT AIRCRAFT INTO NEG G'S NOSE GEAR CAME DOWN AND LOCKED OVER CENTER, LANDED OK. REMOVED AND REPLACED NOSE GEAR ACTUATING - [SDR AUS20031301](https://openairdocs.org/sdr/AUS20031301), Dec 29, 2003: ROD. FRACTURED. (AUS) RT MAIN LANDING GEAR AFT PUSH/PULL ROD ASSEMBLY FRACTURED. - [SDR AUS20031309](https://openairdocs.org/sdr/AUS20031309), Dec 18, 2003: BULKHEAD. CRACKED. (AUS) RT WING TIP TANK REAR ATTACHMENT BULKHEAD CRACKED. - [SDR CA031210002](https://openairdocs.org/sdr/CA031210002), Dec 8, 2003: CYLINDER. CRACKED. (CAN) ON APPROACH TO LANDING RT ENGINE STARTED TO RUN ROUGH. PILOT LANDED WITHOUT INCIDENT. AIRCRAFT WAS BROUGHT INTO THE HANGER AND A DP TEST WAS CONDUCTED ON - [SDR AUS20031184](https://openairdocs.org/sdr/AUS20031184), Oct 29, 2003: SEAL. WORN. (AUS) BRAKE MASTER CYLINDER SEAL WORN. - [SDR AUS20031031](https://openairdocs.org/sdr/AUS20031031), Sep 25, 2003: BOLT. SEPARATED. (AUS) NOSE WHEEL AXLE BOLT NUT SEPARATED ALLOWING AXLE CAP TO FALL OFF THE NOSE WHEEL ASSEMBLY. DURING LANDING THE NOSE WHEEL CAME OUT OF THE FORK AND WEDGED UN - [SDR AUS20030934](https://openairdocs.org/sdr/AUS20030934), Sep 13, 2003: WIRE. LOOSE. (AUS) LANDING GEAR SAFETY SWITCH WIRE LOOSE AT INLINE CONNECTOR. - [SDR BSY2003F00029](https://openairdocs.org/sdr/BSY2003F00029), Sep 12, 2003: MOTOR. MALFUNCTIONED. LANDING GEAR SELECTED DOWN, NOTHING HAPPENED. HAND CRANKED GEAR DOWN LANDED, NO PROBLEM. MAINTENANCE CYCLED GEAR MANY TIMES, COULD NOT DUPLICATE. CHANGED LANDIN - [SDR AUS20030597](https://openairdocs.org/sdr/AUS20030597), May 30, 2003: PIN. MISLOCATED. (AUS) LANDING GEAR FORK BOLT CLEVIS PIN INCORRECTLY FITTED. CLEVIS PIN WAS FITTED BACK TO FRONT AND CONTACTED WHEEL WELL STRUCTURE CAUSING DAMAGE TO TORQUE TUBE - [SDR AUS20030641](https://openairdocs.org/sdr/AUS20030641), May 6, 2003: INJECTOR. BLOCKED. (AUS) RT ENGINE OIL FILTER CONTAMINATED WITH METAL. INVESTIGATION FOUND NR 5 CYLINDER INJECTOR NOZZLE WAS PARTIALLY BLOCKED CAUSING TORCHING OF NR 5 PISTON. - [SDR CA030318015](https://openairdocs.org/sdr/CA030318015), Mar 11, 2003: TUBE. TORN. (CAN) A/C LANDED WITH NO PROBLEM, TAXIED TO RAMP AND PILOT NOTICE A LOT OF DRAG ON RT MAIN HEEL DISESSEMBLED AND FOUND TUBE WITH TWO TEARS APPROX 1/4 INCH. - [SDR AUS20030274](https://openairdocs.org/sdr/AUS20030274), Feb 28, 2003: PROPELLER. DAMAGED. (AUS) PROPELLER FAULTY. FOLLOWING FEATHERING CHECK IAW AD/PROP/2 AMDT2IT WAS FOUND THAT TWO BLADES COULD BE ROTATED BACK TO FULL FINE POSITION BY HAND. - [SDR 2003F00107](https://openairdocs.org/sdr/2003F00107), Feb 10, 2003: MAGNETO. FAILED. RECEIVED A FACTORY REBUILT ENGINE FROM TCM AND INSTALLED. DURING THE GROUND RUNS IT WAS DISCOVERED THAT THE LT MAGNETO WAS DEAD. FURTHER INSPECTION REVEALED THE - [SDR BSY2003F00010](https://openairdocs.org/sdr/BSY2003F00010), Feb 5, 2003: MOTOR. INOPERATIVE. GEAR WOULD NOT COME UP. CYCLED GEAR SEVERAL TIMES COULD NOT DUPLICATE PROBLEM. REMOVED AND REPLACED GEAR MOTOR AS A PRECAUTIONARY MEASURE. OPS CHECK GOOD. - [SDR BSY2003F00004](https://openairdocs.org/sdr/BSY2003F00004), Dec 9, 2002: DOWNLOCK SWITCH. INOPERATIVE. GOING INTO AIRPORT, LT MLG, NO DOWN AND LOCK INDICATION. TROUBLESHOT TO A BAD DOWN AND LOCK SWITCH, REMOVED AND REPLACED SWITCH. OPS CHECKED GOOD. - [SDR CA030122004](https://openairdocs.org/sdr/CA030122004), Dec 4, 2002: PROPELLER. (CAN) NUMBER 1 BLADE WAS LEAKING OIL FROM THE HUB. PROP WAS REMOVED AND SENT TO O/H SHOP. SEAL IN HUB WAS FOUND TO BE LEAKING. SEAL REPLACED -PROP WAS REINSTALL - [SDR AUS20021219](https://openairdocs.org/sdr/AUS20021219), Oct 23, 2002: HUB. WORN. (AUS) ALTERNATOR GEAR DRIVE HUB SLIPPING. FOUND DURING INSPECTION IAW MEB01-3. - [SDR AUS20021275](https://openairdocs.org/sdr/AUS20021275), Oct 22, 2002: TORQUE TUBE. CRACKED. (AUS) LH MAIN LANDING GEAR TORQUE TUBE CRACKED AND TWISTED. - [SDR CA021016036](https://openairdocs.org/sdr/CA021016036), Aug 28, 2002: EXHAUST VALVE. STUCK. (CAN) VIBRATION ON RT ENGINE WITH FIRE, ENGINE FEATHERED. - FUEL LINE MANIFOLD VALVE TO NOZZLE BROKEN DUE TO STICKING EXHAUST VALVE ON CYLINDER NR 6. THE EXHAUS - [SDR AUS20020742](https://openairdocs.org/sdr/AUS20020742), Jul 25, 2002: LANDING GEAR. MISRIGGED. (AUS) LANDING GEAR INCORRECTLY RIGGED. LANDING GEAR COMPONENTS DAMAGED DUE TO THE EXTENT THAT THE LANDING GEAR WAS OUT OF RIG. THE DEFECTS INCLUDE BENT RETRACT - [SDR AUS20020622](https://openairdocs.org/sdr/AUS20020622), Jun 24, 2002: BLADE. CORRODED. (AUS) PROPELLER BLADES CORRODED IN AREA OF BLADE SHANK RADIUS. - [SDR AUS20020719](https://openairdocs.org/sdr/AUS20020719), Jun 22, 2002: GOVERNOR. MAKING METAL. (AUS) LT ENGINE GOVERNOR METAL CONTAMINATION. - [SDR AUS20021112](https://openairdocs.org/sdr/AUS20021112), May 22, 2002: BOLT. FAILED. (AUS) NO6 CYLINDER UPPER THROUGH BOLT FAILED. All 187: https://openairdocs.org/engine/continental-io-520-m/reports.md ## STCs that may be installed (OpenAirDocs) (46) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE5583SW](https://openairdocs.org/stc/SE5583SW): Installation of fuel flow transducers (true-flow totalizer). Alcor LLC. Lists IO-520 Series - [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd - [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc - [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc - [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp - [STC 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 SE09356SC](https://openairdocs.org/stc/SE09356SC): Install F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter adapter for a spin-on oil filter. Stratus Tool Technologies LLC - [STC SE09217SC](https://openairdocs.org/stc/SE09217SC): Installation of modified fuel injector nozzles. General Aviation Modifications Inc - [STC SE94WE](https://openairdocs.org/stc/SE94WE): Installation of oil fitting(AN-823-5D) in rocker box cover. Airwolf Filter Corporation - [STC SE00115SE](https://openairdocs.org/stc/SE00115SE): Replaces Teledyne-Continental Part Number 646277 lifter bodies. B & B Aviation LLC - [STC SE5785NM](https://openairdocs.org/stc/SE5785NM): Replacement of Teledyne Continental original camshaft with P/N 32122-2. B & B Aviation LLC - [STC SE70RM](https://openairdocs.org/stc/SE70RM): Installation of compressor bracket. Air Comm Corporation - [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc - [STC SE1186SW](https://openairdocs.org/stc/SE1186SW): Regrooving of pistons P/N 631475 or P/N 632585. Continental Motors, Inc - [STC SE2340SW](https://openairdocs.org/stc/SE2340SW): Installation of modified cylinder assemblies, barrels, piston, and repaired crankcases. Continental Motors, Inc - [STC SE5820SW](https://openairdocs.org/stc/SE5820SW): Installation of Airmotive exhaust valve, P/N AEC-637781. Continental Motors, Inc. Lists IO-520 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc - [STC SE09979SC](https://openairdocs.org/stc/SE09979SC): Modification of Teledyne Continental Motors IO-520-B, IO-520-BA, or IO-520-BB engine to an Ultimate Engines IO-550-B/UE engine. General Aviation Modifications, Inc - [STC SE3330NM](https://openairdocs.org/stc/SE3330NM): Continental valve cover gasket. Real Gaskets Tennessee - [STC SE267CH](https://openairdocs.org/stc/SE267CH): Installation of Slick Model 6309 and 6313 magnetos. Champion Aerospace LLC - [STC SE7325SW-D](https://openairdocs.org/stc/SE7325SW-D): Installation of crankcase modifications. RAM Aircraft Limited Partnership - [STC SE09846SC](https://openairdocs.org/stc/SE09846SC): Installation of S539800M30 starter adapter springs. Aircraft Specialties Services Inc - [STC SE487GL](https://openairdocs.org/stc/SE487GL): Installation of a fuel flow transducer. Shadin Company Inc - [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 SE09997SC](https://openairdocs.org/stc/SE09997SC): Modification of Teledyne Continental Motors IO-520-B or IO-520-BA or IO-520-BB engine. Barrett Performance Aircraft. Lists IO-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 IO-520 Series - [STC SE09559SC](https://openairdocs.org/stc/SE09559SC): Installation of US Airparts roller rocker arm assemblies P/N US92E exhaust and US92I intake. US Airparts, Inc - [STC SE55WE](https://openairdocs.org/stc/SE55WE): Modification of fuel injection manifold valve P/N 626547 to the P/N 631427 or P/N 636326 configuration. AAR Aircraft Services Inc. d/b/a AAR Aircraft Services-Oklahoma. Lists IO-520 Series - [STC SE09319SC](https://openairdocs.org/stc/SE09319SC): Modify oil pan adding a new oil sump drain. Texas Skyways Inc. Lists IO-520 Series - [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation - [STC SE00143SE](https://openairdocs.org/stc/SE00143SE): Replaces the following Teledyne-Continental part numbers: 641682 (Rocker Arm, Exhaust), 539742 (Rocker Arm, Intake), 539740 (Rocker Arm, Shaft) and 538304 (Pushrod Assembly). Dakota Aircraft Parts Inc - [STC SE8687SW](https://openairdocs.org/stc/SE8687SW): Regrooving of pistons P/N 631475 or P/N 632585. Capehart Industries, Inc. Lists IO-520 Series - [STC SE00005DE](https://openairdocs.org/stc/SE00005DE): Installation of engine oil filter adapter compatable with SA4094NM Oilamatic, Inc. engine preoiling system. Oilamatic Inc - [STC SE8594SW](https://openairdocs.org/stc/SE8594SW): Installation of roller rocker arm P/N PE 92I intake and PE92E exhaust. Performance Engineering - [STC SE5205NM](https://openairdocs.org/stc/SE5205NM): Installation of an Oilamatic engine filter screen adapter. Oilamatic Inc - [STC SE7422SW](https://openairdocs.org/stc/SE7422SW): Installation of Performance Engineering roller rocker arms. Performance Engineering - [STC SE2197CE](https://openairdocs.org/stc/SE2197CE): Add the following approved fuel: leaded & unleaded automotive gasoline 91 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved. Petersen Aviation Inc - [STC SE3812SW](https://openairdocs.org/stc/SE3812SW): Recontouring and polishing(porting) of intake manifold and exhaust parts and air flow balancing. High Performance Aircraft. Lists IO-520 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-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 IO-520 Series - [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists IO-520 Series - [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less. Bel-Ray Company, Inc. Lists IO-520 Series - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists IO-520 Series - [STC SE72WE](https://openairdocs.org/stc/SE72WE): BG-341 spark plug as eligible for installation on listed Continental engines. Lewis Leibee - [STC SE7325SW](https://openairdocs.org/stc/SE7325SW) (historical): Installation of crankcase modifications. 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