# Continental IO-520-MB - Type: Engine model (FAA registry) - Registry code: 17235 - Manufacturer (registry): CONT MOTOR - Model: IO-520-MB - Engine type: Reciprocating - Power: 285 hp - Data sheet: [TCDS E5CE](https://openairdocs.org/tcds/E5CE) (OpenAirDocs) - Holder: Continental Aerospace Technologies, Inc. - Installed in: 8 registered aircraft - Page: https://openairdocs.org/engine/continental-io-520-mb 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 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) 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 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) (10) - [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 ## Registered aircraft (8) - [N1919J](https://openairdocs.org/aircraft/N1919J): [Valiair Lc Trustee](https://openairdocs.org/faa-owner/VALIAIR%20LC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1979, S/N 310R1554 - [N21GB](https://openairdocs.org/aircraft/N21GB): [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 1979, S/N 310R-1580 - [N310AJ](https://openairdocs.org/aircraft/N310AJ): [Pj Aviation Holding LLC Trustee](https://openairdocs.org/faa-owner/PJ%20AVIATION%20HOLDING%20LLC%20TRUSTEE), [Eden Prairie, MN](https://openairdocs.org/faa-place/MN/Eden%20Prairie), built 1980, S/N 310R1606 - [N310GG](https://openairdocs.org/aircraft/N310GG): Obersulm, built 1979, S/N 310R1585, Sale reported - [N350JC](https://openairdocs.org/aircraft/N350JC): [Wear On Earth Aviation LLC](https://openairdocs.org/faa-owner/WEAR%20ON%20EARTH%20AVIATION%20LLC), [Potsdam, NY](https://openairdocs.org/faa-place/NY/Potsdam), built 1975, S/N 310R0606 - [N443LT](https://openairdocs.org/aircraft/N443LT): [Valiair Ltd Co Trustee](https://openairdocs.org/faa-owner/VALIAIR%20LTD%20CO%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1976, S/N 310R-0627 - [N444LJ](https://openairdocs.org/aircraft/N444LJ): [Dsl Aviation LLC](https://openairdocs.org/faa-owner/DSL%20AVIATION%20LLC), [Ronkonkoma, NY](https://openairdocs.org/faa-place/NY/Ronkonkoma), built 1978, S/N 310R-1294 - [N747YK](https://openairdocs.org/aircraft/N747YK): [Yk Flight Inc Trustee](https://openairdocs.org/faa-owner/YK%20FLIGHT%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1975, S/N 310R0138 ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## Service difficulty reports (30) As reported by operators and repair stations, by the model named in the report. - [SDR 2026FA0000433](https://openairdocs.org/sdr/2026FA0000433), May 27, 2026: ALTERNATOR. INOPERATIVE. THE PILOT REPORTED THE LH ALTERNATOR FAILURE LIGHT ILLUMINATED IN FLIGHT, WITH THE LH ALTERNATOR INDICATING NO ELECTRICAL OUTPUT. THE ALTERNATOR WAS INSTALLED O - [SDR 7RKR2024043001](https://openairdocs.org/sdr/7RKR2024043001), Apr 29, 2024: MUFFLER. SEPARATED. DURING VISUAL INSPECTION PRIOR TO MAINTENANCE RH MUFFLER OF LH ENGINE WAS FOUND TO BE COMPLETELY SEPARATED FROM FORWARD PIVOT ADAPTER TUBE AT TUBE-TO-MUFFLER WE - [SDR W1XA20210614](https://openairdocs.org/sdr/W1XA20210614), Jun 14, 2021: ENGINE. FAILED. PILOT DEPARTED KANE, WHILE CLIMBING THROUGH 2,700', LEFT ENGINE DEVELOPED A VIBRATION. WHILE SCANNING ENGINE INSTRUMENTS HE NOTICED THE LEFT ENGINE OIL PRESSURE - [SDR N4CA2019012100002](https://openairdocs.org/sdr/N4CA2019012100002), Jan 17, 2019: BELLCRANK. BROKEN. BELLCRANK FORK ASSEMBLY BROKE WHILE EXTENDING THE LANDING GEAR FOR LANDING CAUSING THE NOSE GEAR TO NOT EXTEND. AIRCRAFT LANDED WITH MAIN GEAR ONLY. - [SDR 2015FA0000066](https://openairdocs.org/sdr/2015FA0000066), Feb 19, 2015: SEAL. BLEW OUT. ICE BUILDUP ON VENT TUBE CAUSED CRANKCASE PRESSURES TO INCREASE AND CRANKSHAFT SEAL TO PUSH ON RETAINERS TILL FAILURE. FLIGHT WAS AT NIGHT AND LEAK WAS NOT NOTI - [SDR CA120202004](https://openairdocs.org/sdr/CA120202004), Feb 2, 2012: SUPPORT BEAM. CRACKED. (CAN) RIGHT ENGINE SUPPORT BEAMS INSPECTED IAW INSPECTION OPERATION 35 DURING ENGINE REPLACEMENT A2 CM. CRACK WAS FOUND VISUALLY BELOW THE FRONT INBD MOUNT ATTA - [SDR CA100809007](https://openairdocs.org/sdr/CA100809007), May 13, 2010: HEATER. CORRODED. PILOTS REPORT SMELL OF RAW FUEL ON DESCENT/APPROACH FROM HEATER. MX CHECKED VARIOUS TIMES BUT COULD NOT DUPLICATE. INSP REVEALED FUEL LINE RUNNING DOWN RT WALL - [SDR 2007FA0000331](https://openairdocs.org/sdr/2007FA0000331), Apr 4, 2007: ROD BOLT. BROKEN. PRELIMINARY INSPECTION FINDINGS: IN FLIGHT, LT ENGINE FAILURE ON CLIMB OUT. LT ENGINE HAD 737.1 HOURS AND PUT IN SERVICE 05/2003. LARGE HOLE IN CASE AROUND NR 5 - [SDR AZN2006F00000](https://openairdocs.org/sdr/AZN2006F00000), Jun 15, 2006: PUSHROD TUBE. BROKEN. WHILE LANDING NOSE GEAR FAILED TO EXTEND PILOT LANDED AIRCRAFT WITH NOSE GEAR UP, BOTH MAINS DOWN AND LOCKED. FOUND NOSE GEAR PUSH PULL TUBE JUST FWD OF THE GEA - [SDR CA060510009](https://openairdocs.org/sdr/CA060510009), May 8, 2006: SHAFT. BROKEN. THREE GEAR TEETH BROKEN OFF AND MISSING. ONE OTHER TOOTH CRACKED. - [SDR CA051201001](https://openairdocs.org/sdr/CA051201001), Nov 30, 2005: IDLER ASSY. CRACKED. DURING ROUTINE INSPECTION OF THE RIGHT MAIN LANDING GEAR, A SMALL CRACK IN PAINT HAS BEEN FOUND ON THE UPPER RADIUS OF THE BELLCRANK GEAR IDLER DOOR ARM. NON DE - [SDR CA050404007](https://openairdocs.org/sdr/CA050404007), Apr 4, 2005: TORQUE TUBE. CRACKED. (CAN) FOLLOWING AN INSPECTION, RECOMMENDED BY THE MANUFACTURER, RT MAIN LANDING GEAR EXTENSION/RETRACTION TORQUE TUBE FOUND CRACKED IN TWO PLACES, AT THE FORK B - [SDR CA050218011](https://openairdocs.org/sdr/CA050218011), Feb 12, 2005: CONNECTING ROD. BENT. (CAN) AIRPLANE FLYING AT CRUISE POWER, ENGINE FEATHERED ON ITS OWN, ENGINE PARAMETER CHECK, NO OIL PRESSURE. ENGINE SHUTDOWN, RETURN TO AIRPORT. INITIAL CHECK R - [SDR DIN2004F000A](https://openairdocs.org/sdr/DIN2004F000A), Feb 10, 2004: GEAR. DAMAGED. A COMPLETE O/H OF THE ENGINE AND MAGNETOS WAS ACCOMPLISHED BY MFG ON 6/20/2002. THE PLASTIC GEAR (10-357583) DID NOT SEEM TO BIND WITH ANY FOREIGN MATERIALS. TH - [SDR CA030626008](https://openairdocs.org/sdr/CA030626008), Jun 19, 2003: BEAM. BENT. (CAN) THE MAIN BEAM ON THE NR 2 & 6 CONNECTING RODS WERE BENT. NR 5 WAS THE MOST SEVERE. POSSIBLE CAUSE IS HYD LOCKING. - [SDR CA030605003](https://openairdocs.org/sdr/CA030605003), May 26, 2003: CONTACTOR. ARCED. (CAN) ELECTRICAL SYSTEM FAILED. LT STARTER RELAY STUCK IN ON POSITION DURING START. STARTER ROTATED TILL BATTERY WAS RUN OUT AS IT WAS A HIGH LOAD. SERVICEABLE - [SDR BSY2003F00007](https://openairdocs.org/sdr/BSY2003F00007), Jan 23, 2003: DOWNLOCK SWITCH. BROKEN. HAD NO RIGHT GEAR DOWN AND LOCK INDICATION. FOUND DOWN AND LOCK SWITCH ACTUATOR ARM BROKEN, REMOVED AND REPLACED ARM. OPS CHECKED GOOD. - [SDR AZN2003F00000](https://openairdocs.org/sdr/AZN2003F00000), Dec 6, 2002: RIVET. SHEARED. TWO FASTENERS FAILED AT OUTBOARD AFT TRAILING EDGE OF LEFT WING. WHERE THE AFT TIP FUEL TANK AND OUTBOARD AILERON HINGE BRACKET MOUNT. CREATING MOVEMENT OF AFT - [SDR CA020116001](https://openairdocs.org/sdr/CA020116001), Nov 30, 2001: BRACKET. BROKEN. (CAN) FIRE IN COCKPIT ON DESCENT FROM FLIGHT TO AIRPORT. SMOKE EMITING FROM RT DASH BY PROP DE-ICE GAUGE. SMOKE TURNED TO FLAME AND EXTINGUISHER EXERCISED. EXAM - [SDR CA010703031](https://openairdocs.org/sdr/CA010703031), Jun 23, 2001: DIODE. FAILED. (CAN) ON JUNE 23/01 THE PILOT SNAGGED HIS A/C AS THE LT ALTERNATOR BEING U/S/. UPON INSPECTION THE ALTERNATOR HAD A HOLE ON THE SIDE OF IT. REMOVED THE ALTERNAT - [SDR 20010420CW012](https://openairdocs.org/sdr/20010420CW012), Apr 20, 2001: HOUSING. CRACKED. LT ENGINE NOT PRODUCING POWER, LEAKING OIL OUT LEFT LEFT TOP GRATE. INSPECTED, FOUND CASE CRACKED BELOW NR 1 CYLINDER AROUND PUSH ROD HOUSING ASSEMBLY AND NR 1 - [SDR CA001228033](https://openairdocs.org/sdr/CA001228033), Oct 15, 2000: TORQUE TUBE. CRACKED. (CAN) LEFT MAIN GEAR REPORTED TO PILOT AS PART WAY RETRACTED. GEAR PLACED IN DOWN POSITION WITH 3 GREEN OBSERVED. PILOT LANDED SAFELY.MAINTENANCE PERSONNEL FOUN - [SDR CA001106017](https://openairdocs.org/sdr/CA001106017), Oct 15, 2000: TORQUE TUBE. CRACKED. (CAN) LANDING GEAR REPORTED TO PILOT AS PART WAY RETRACTED. (LEFT MAIN). GEAR PLACED IN DOWN POSITION, WITH 3 GREEN OBSERVED. PILOT LANDED SAFELY.MAINTENANCE FO - [SDR CA000927003](https://openairdocs.org/sdr/CA000927003), Aug 31, 2000: BELLCRANK. BROKEN. (CAN) AFTER LANDING, PILOT NOTICED THAT THE GEAR DOOR ON THE LEFT MAIN WAS HANGING DOWN. AIRCRAFT WAS PLACED ON JACKS AND GEAR DOOR BELLCRANK WAS FOUND TO BE BR - [SDR CA000621019](https://openairdocs.org/sdr/CA000621019), Jun 1, 2000: PUMP. FAILED. (CAN) DURING START UP NO FUEL PRESSURE FOR PRIME WITH PUMP ON HIGH OR LOW. MAINTENANCE REPLACED THE BOOST PUMP IN THE TANK, NOTICED THE LABEL MISSING,RETRIEVED - [SDR 20000620SH003](https://openairdocs.org/sdr/20000620SH003), May 25, 2000: ENGINE. SURGES. CMH - RIGHT ENGINE ON APPROACH STARTED SURGING BETWEEN 2,200 RPM AND 2,600 RPM. CHECKED ENGINE OUT COMPLETELY, COULD NOT DUPLICATE. OPS CHECKED GOOD. (X) - [SDR CA000927002](https://openairdocs.org/sdr/CA000927002), Dec 29, 1999: TORQUE TUBE. BROKEN. (CAN) PILOT COULD NOT GET A GREEN LIGHT INDICATION ON THE LEFT MAIN GEAR. PILOT MADE A SUCCESSFUL LANDING WITHOUT ANY DAMAGE TO THE AIRCRAFT. AIRCRAFT WAS PUT O - [SDR CA991007071](https://openairdocs.org/sdr/CA991007071), Oct 7, 1999: BELLCRANK. BROKEN. (CAN) BELLCRANK ATTACH BOLT AND TRUNNION ATTACH LUGS FAILED. BELLCRANK LOWER AFT LUG ALSO FAILED RESULTING IN THE SIDE BRACE NOT LOCKING AND ALLOWING THE RIGHT - [SDR CA961009007](https://openairdocs.org/sdr/CA961009007), Sep 30, 1996: BELLCRANK. BROKEN. (CAN) WHEN AIRCRAFT RETURNED FROM TEST FLIGHT THE RIGHT MAIN GEAR DOOR WAS HANGING DOWN. FURTHER INSPECTION REVEALED THAT THE GEAR DOOR BELLCRANK HAD BROKEN 3" - [SDR 95ZZZX689](https://openairdocs.org/sdr/95ZZZX689), Jan 23, 1995: CONNECT ROD. BROKE. NR 6 CYLINDER CONNECTING ROD ASSY, PN 646476, BROKE MIDWAY DOWN ROD. AIRCRAFT WAS IN LEVEL FLIGHT AT 3,000 AGL. FIFTEEN MINUTES AFTER TAKEOFF, CAUSE UNKNOWN. ## STCs that may be installed (OpenAirDocs) (39) 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 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 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 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 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 SE7325SW](https://openairdocs.org/stc/SE7325SW) (historical): Installation of crankcase modifications. RAM Aircraft Limited Partnership --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.