# Continental 0-300-C

- Type: Engine model (FAA registry)
- Registry code: 17175
- Manufacturer (registry): CONT MOTOR
- Model: 0-300-C
- Engine type: Reciprocating
- Power: 145 hp
- Data sheet: [TCDS E-253](https://openairdocs.org/tcds/E-253) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 4 registered aircraft
- Page: https://openairdocs.org/engine/continental-0-300-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 2023-17-04](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 2011-26-07](https://openairdocs.org/ad/2011-26-07): Engine · Continental Motors C-125-1, C-125-2, C145-2 and 48 more. Effective Jan 24, 2012
- [AD 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998
- [AD 94-05-05 R1](https://openairdocs.org/ad/94-05-05-R1): Cylinder Rocker · Continental Motors C-125-1, C-125-2, C145-2 and 59 more. Effective Feb 13, 1996
- [AD 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 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 93-11-03](https://openairdocs.org/ad/93-11-03): Incorrect Connecting Rod · Continental Motors O-200-A, O-300-A, O-300-C and 1 more. Effective Jul 13, 1993
- [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980

Historical (superseded or no longer in force):

- [AD 2022-04-04](https://openairdocs.org/ad/2022-04-04) (historical): 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 Mar 29, 2022
- [AD 2002-13-04](https://openairdocs.org/ad/2002-13-04) (historical): Magneto impulse coupling stop pin · Teledyne Continental Motors C-125-1, C-125-2, C145-2 and 48 more. Effective Jul 12, 2002
- [AD 2000-11-51](https://openairdocs.org/ad/2000-11-51) (historical): Magnetos · Teledyne Continental Motors IO-360 Series (all), LTSIO-520-AE, O-300-A and 21 more

## Information bulletins (advisory) (3)

- [SAIB NE-18-27](https://openairdocs.org/saib/NE-18-27): POWERPLANT  Rocker Shaft Boss Inspection. Issued Sep 10, 2018
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [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

## Registered aircraft (4)

- [N718DF](https://openairdocs.org/aircraft/N718DF): [Turning Point @ Sonrise Inc](https://openairdocs.org/faa-owner/TURNING%20POINT%20%40%20SONRISE%20INC), [Hartsville, TN](https://openairdocs.org/faa-place/TN/Hartsville), built 1964, S/N 17251190
- [N7821T](https://openairdocs.org/aircraft/N7821T): [Cameron Michael Shelley](https://openairdocs.org/faa-owner/CAMERON%20MICHAEL%20SHELLEY), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), built 1960, S/N 47421
- [N8818T](https://openairdocs.org/aircraft/N8818T): [Engel Samina](https://openairdocs.org/faa-owner/ENGEL%20SAMINA), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego), built 1964, S/N 17251521
- [N901MS](https://openairdocs.org/aircraft/N901MS): [Dantonio David R](https://openairdocs.org/faa-owner/DANTONIO%20DAVID%20R), [Wichita Falls, TX](https://openairdocs.org/faa-place/TX/Wichita%20Falls), S/N 074

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW74FPA01](https://openairdocs.org/ntsb/FTW74FPA01), Jul 21, 1973: Cessna 172 (N7821T), Denison, TX, substantial damage

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19730721021869A](https://openairdocs.org/incident/19730721021869A), Jul 21, 1973: Cessna 172A (N7821T), Denison, TX, Substantial damage. Ldg gr hit shallow drainage ditch at end of rnwy.

## Service difficulty reports (40)

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

- [SDR CA131002007](https://openairdocs.org/sdr/CA131002007), Sep 26, 2013: BRACKET. CRACKED. (CAN) BRACKET 051305-63-1, FRONT ELEVATOR BELL CRANK SUPPORT, IN CABIN UNDER FLOOR CRACKS AT LUG ATTACH AREA. REPLACED WITH LATER STRONGER, LONGER LUGS, MORE RI
- [SDR CA090813006](https://openairdocs.org/sdr/CA090813006), Jun 23, 2009: YOKE. CORRODED. YOKE BROKE DURING WIND STORM. YOKE FOUND BORKEN AT THE BOTTOM PART DUE TO CORROSION (INSIDE TUBE).
- [SDR CA081117007](https://openairdocs.org/sdr/CA081117007), Nov 15, 2008: CYLINDER. CRACKED. (CAN) NR 3 CYLINDER ASSY WAS FOUND CRACKED BETWEEN THE CYLINDER HEAD AND THE BARREL, APPROX .7500 AROUND THE CICUMFERENCE OF THE ASSY. THIS RESULTED IN LOSS OF 
- [SDR CA060405009](https://openairdocs.org/sdr/CA060405009), Apr 5, 2006: ENGINE. MAKING METAL. OIL SCREEN BYPASS LIGHT CAME ON INFLIGHT. SCREEN INSPECTION FOUND FERROUS AND NON-FERROUS METAL IN QUANTITY.
- [SDR CA050624002](https://openairdocs.org/sdr/CA050624002), Jun 11, 2005: WHEEL. FAILED. AS AIRCRAFT TAXIED FROM TIE-DOWN, NOSE WHEEL FAILED ABRUPTLY, APPROXIMATELY 15 FEET FROM TIE-DOWN, TUBE, TIRE AND NOSE WHEEL REMAINED IN YOKE, WITH NO DAMAGE TO
- [SDR AU510002001](https://openairdocs.org/sdr/AU510002001), Jun 10, 2005: FORK. CORRODED. RT AILERON BELLCRANK FORK CORRODED. FOUND DURING INSPECTION IAW AWB 27-1. AIRCRAFT HAS SPENT MOST OF ITS LIFE OUTDOORS.
- [SDR CA050324008](https://openairdocs.org/sdr/CA050324008), Mar 16, 2005: PISTON. ERODED. (CAN) TOP LAND OF PISTON ERODED AWAY AND HOLE BURNED THROUGH PISTON BELOW 3RD RING FROM HEAD OR TOP OF PISTON. PISTON EXPANDED FROM EXCESSIVE HEAT AND SCUFFED A
- [SDR AUS20040015](https://openairdocs.org/sdr/AUS20040015), Jan 14, 2004: SUPPORT. CRACKED. (AUS) PROPELLER SPINNER FORWARD SUPPORT CRACKED AROUND PROPELLER BOLT ATTACHMENT HOLES. SUPPORT HAD BEEN FITTED 30 HOURS AGO DUE TO THE SAME PROBLEM WITH THE PR
- [SDR AUS20030945](https://openairdocs.org/sdr/AUS20030945), Sep 8, 2003: STRUT. CORRODED. (AUS) LT AND RT MAIN LANDING GEAR LEGS CORRODED.
- [SDR CA021119008](https://openairdocs.org/sdr/CA021119008), Oct 25, 2002: FLYING WIRE. BROKEN. (CAN) HARD LANDING ON GATINEAU RIVER - BROKE BOTH FLYING WIRES THAT ATTACH UPPER LT HAND AND LOWER RT HAND. THIS ALLOWED THE AIRPLANE TO GO DOWN ON RT WING TIP.
- [SDR CA020530006](https://openairdocs.org/sdr/CA020530006), May 16, 2002: BRACKET. CRACKED. (CAN) DURING SCHEDULED MAINTENANCE, IT WAS DISCOVERED THAT THE BELLCRANK BRACKET P/N 0513063-3 IN THE BULKHEAD ASSEMBLY, FRONT DOOR POST WAS CRACKED. THE FORWAR
- [SDR CA020530009](https://openairdocs.org/sdr/CA020530009), May 9, 2002: PISTON. BROKEN. (CAN) ENGINE RAN WELL NO VISIBLE PROBLEM. PIECE OF PISTON SKIRT BROKEN LOOSE HELD IN BY OIL RING AND CYLINDER CURVE ONLY.
- [SDR AUS20011228](https://openairdocs.org/sdr/AUS20011228), Nov 19, 2001: WHEEL. FAILED. (AUS) PILOTS CONTROL WHEEL BROKE INTO SEVERAL PIECES. INVESTIGATION FOUND THE COPILOTS CONTROL WHEEL CRACKED BEYOND LIMITS.
- [SDR AUS20010748](https://openairdocs.org/sdr/AUS20010748), Jul 17, 2001: RIB. CORRODED. (AUS) ELEVATOR END RIB EXTENSIVELY CORRODED.
- [SDR CA010628025](https://openairdocs.org/sdr/CA010628025), Jun 15, 2001: VALVE GUIDE. CRACKED. (CAN) CYL REMOVED FOR LOW COMRESSION, DUE TO WORN VALVE GUIDE AND VALVE.
- [SDR AU010180](https://openairdocs.org/sdr/AU010180), Feb 20, 2001: CRANKCASE. CRACKED. (AUS) ENGINE IN AN EXTREMELY POOR CONDITION. DEFECTS INCLUDE CRACKED CRANKCASE, WORN CRANKSHAFT, WORN GEARS, WORN CYLINDERS AND VALVES.
- [SDR AU001204](https://openairdocs.org/sdr/AU001204), Dec 20, 2000: CONTROL CABLE. MISINSTALLED. (AUS) FORWARD LH FLAP RETRACTION CABLE AND RH AILERON CABLES CROSSEDOVER EACH OTHER UNDER THE FLOOR BEHIND THE LANDING GEAR BULKHEAD. FLAP AND AILERON CABLES IN
- [SDR AU001079](https://openairdocs.org/sdr/AU001079), Nov 8, 2000: SPAR. CORRODED. (AUS) WING CENTER SECTION SPAR TO PN 0512124-35 AND PN 0512124-36 LT AND RT DOOR POST CHANNELS HAD ATTACHMENT RIVETS CORRODED WITH RIVET HEADS MISSING. (X)
- [SDR AU990833](https://openairdocs.org/sdr/AU990833), Jul 1, 1999: BRACKET. CRACKED. (AUS) ELEVATOR BELLCRANK ATTACHMENT BRACKET SUPPORT CRACKED.
- [SDR AU990832](https://openairdocs.org/sdr/AU990832), May 7, 1999: SPAR. CORRODED. (AUS) RIGHT WING MAIN SPAR AND SPAR CAP CONTAINED EXTENSIVE CORROSION. RIBS AND SKIN ALSO CORRODED.
- [SDR AU990344](https://openairdocs.org/sdr/AU990344), Mar 3, 1999: WASHER. MISSING. (AUS) SEAT BELT FLOOR ATTACHMENT FITTINGS HAD THE WASHERS UNDER THE FORWARD NUTS MISSING.
- [SDR AU981051](https://openairdocs.org/sdr/AU981051), Aug 16, 1998: TORQUE LINK. CRACKED. (AUS) LANDING GEAR TORQUE LINK SIDE WEBS CRACKED IN FIVE PLACES.
- [SDR AU980585](https://openairdocs.org/sdr/AU980585), May 25, 1998: VENTURI. LOOSE. (AUS) CARBURETOR VENTURI LOOSE.
- [SDR CA980513009](https://openairdocs.org/sdr/CA980513009), May 6, 1998: RHEOSTAT. DEFECTIVE. (CAN) ON ANNUAL INSPECTION, AD CHECK INDICATED THAT AD 93-24-05 OR SB SEB-92-33R1 HAD NOT BEEN CARRIED OUT, REPLACEMENT OF LIGHT RHEOSTAT DUE TO POSSIBLE FIRE. 
- [SDR AU980380](https://openairdocs.org/sdr/AU980380), Feb 17, 1998: ROCKER ARM. BROKEN. (AUS) NR 4 CYLINDER INLET VALVE ROCKER ARM BROKEN AND PUSHROD BENT. PART TC: 3,090.
- [SDR CA971010008](https://openairdocs.org/sdr/CA971010008), Sep 27, 1997: CARBURETOR. FAILED. (CAN) DURING CRUISE THE ENGINE BEGAN TO SUFFER POWER LOSS WITHOUT WARNING. EMERGENCY LANDING WAS CARRIED OUT. POST FLIGHT INSPECTION FOUND FUEL POURING FROM THE
- [SDR AU970699](https://openairdocs.org/sdr/AU970699), Jun 22, 1997: TORQUE TUBE. CORRODED. (AUS) LH AND RH ELEVATOR TORQUE TUBE COLLARS PNO 0734102-3 (INBOARD) AND PNO 0734102-4 (OUTBOARD) SEVERELY CORRODED - RIVET HEADS LOST - RIBS, SKIN AND STRINGER
- [SDR AU970780](https://openairdocs.org/sdr/AU970780), Jun 20, 1997: BLOCK. CORRODED. (AUS) FUSELAGE REAR SPAR WING ATTACHMENT BLOCK CRACKED AND CORRODED
- [SDR AU970350](https://openairdocs.org/sdr/AU970350), Apr 11, 1997: HUB. CRACKED. (AUS) PROPELLER HUB CRACKED IN AREA OF NO1 BLADE BOLT HOLES - REWORK OF HUB REVEALED ONE MAIN CRACK APPROXIMATELY 15.875MM (0.625IN) LONG TOGETHER WITH THREE SU
- [SDR AU970218](https://openairdocs.org/sdr/AU970218), Mar 5, 1997: SPAR. CRACKED. (AUS) HORIZONTAL STABILISER FORWARD SPAR CRACKED AT CENTRE LIGHTENING HOLE AS INDICATED IN SEB 94-8 - CRACK LENGTH APPROXIMATELY 10MM (0.393IN) - SUSPECT PROBLE
- [SDR AU970086](https://openairdocs.org/sdr/AU970086), Feb 7, 1997: FLAP. DAMAGED. (AUS) RH FLAP DISTORTED - FLAP HAD A BUILT IN CHORDWISE TWIST OFAPPROXIMATELY 2.5 DEGREES - FLAP HAD BEEN DAMAGED AND REPAIRED ON 23/7/68 - FLAP HAD WORN FLAP T
- [SDR AU970781](https://openairdocs.org/sdr/AU970781), Feb 6, 1997: BLOCK. CORRODED. (AUS) FUSELAGE REAR SPAR WING ATTACHMENT BLOCK CRACKED AND CORRODED BETWEEN BLOCKS AND INNER SURFACE OF SPAR
- [SDR CA960924040](https://openairdocs.org/sdr/CA960924040), Sep 1, 1996: CARBURETOR. MIS MODIFIED. (CAN) MODIFICATION OF CARBURETOR SINGLE PIECE VENTURI AND METAL FLOAT INSTALLATION WAS DONE IMPROPERLY. THE SPRING WHICH BRINGS DOWN THE NEEDLE WHEN THE FLOAT D
- [SDR AU961212](https://openairdocs.org/sdr/AU961212), Aug 27, 1996: SWITCH. FAULTY. (AUS) ELT `G' SWITCH FAULTY
- [SDR AU961158](https://openairdocs.org/sdr/AU961158), Aug 8, 1996: SEAT BELT. WRONG PART. (AUS) SEAT BELT WEBBING AND HARDWARE WAS OF AUTOMOTIVE ORIGIN - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERROR
- [SDR AU960973](https://openairdocs.org/sdr/AU960973), Jul 4, 1996: SEAT BELT. WRONG PART. (AUS) SEAT BELTS MANUFACTURED FROM AUTOMOTIVE HARDWARE AND WEBBING - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERROR
- [SDR AU960783](https://openairdocs.org/sdr/AU960783), May 13, 1996: BLOCK. CORRODED. (AUS) CENTRE WING SPAR BEARING BLOCK CONTAINS SEVERE INTERGRANNULAR EXFOLIATION CORROSION
- [SDR AU960268](https://openairdocs.org/sdr/AU960268), Mar 13, 1996: CRANKSHAFT. WORN. (AUS) ENGINE CONTAINED NUMEROUS DEFICIENCIES MAKING IT UNSERVICEABLE FOR USE: 1. CRANKSHAFT 0.0254MM TO 0.0508MM (0.001IN TO 0.002IN) UNDER MINIMUM LIMITS2. CRA
- [SDR 96ZZZX61](https://openairdocs.org/sdr/96ZZZX61), Dec 6, 1995: MAGNETO. BEARING LOOSE. TIME SINCE MAGNETO FACTORY REBUILT, 448.4 HOURS. DURING INSPECTION (500-HOURS), DISCOVERED FRONT BEARING RACE WAS LOOSE IN FRONT HOUSING. NOT APPARENT UNTIL WIP
- [SDR 95ZZZX6152](https://openairdocs.org/sdr/95ZZZX6152), Oct 2, 1995: PISTON. BROKEN. LOW COMPRESSION ON NR 1 CYLINDER (80/60) FOUND DURING ANNUAL INSPECTION. DISCOVERED OIL RING MISSING AND PISTON SKIRT BROKEN OFF. SUBMITTER SUSPECTS CAUSED BY I

## STCs that may be installed (OpenAirDocs) (35)

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 SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC
- [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists O-300 Series
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com. Lists O-300 Series
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd
- [STC SE00145WI](https://openairdocs.org/stc/SE00145WI): Installation of B&C Specialty Products Model BC 320-( ) Engine Starter. B & C Specialty 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 SE00533SE](https://openairdocs.org/stc/SE00533SE): Installation of Real Gasket Corporation Continental Engine Pushrod Tube Modification. Real Gaskets Tennessee
- [STC SE8409SW](https://openairdocs.org/stc/SE8409SW): Installation of P/N CO-300-1 Oil Filter Adaptor with spin-on filter as a replacement for the existing oil screen. Stratus Tool Technologies LLC
- [STC SE10076SC](https://openairdocs.org/stc/SE10076SC): Modify engine by installation of C12ST2/S starter. Hartzell Engine Technologies, LLC
- [STC SE10129SC](https://openairdocs.org/stc/SE10129SC): Installation of rotocoil, valve springs, ni-resist valve guide, exhaust valve with chrome flash on stem, and rocker shaft with thrust buttons. Continental Motors, Inc
- [STC SE34WE](https://openairdocs.org/stc/SE34WE): Installation of Electro-Coatings, Inc., piston rings on Continental pistons. Continental Motors, Inc
- [STC SE8112SW](https://openairdocs.org/stc/SE8112SW): Installation of any or all parts identified by Parts Application List AEC9109-2. Continental Motors, Inc
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc
- [STC SE3330NM](https://openairdocs.org/stc/SE3330NM): Continental valve cover gasket. Real Gaskets Tennessee
- [STC SE1220GL](https://openairdocs.org/stc/SE1220GL): Replacement of Slick Model 664 magnetos with Slick Model 6264 magnetos or installation of Model 6364 magneto. Champion Aerospace LLC
- [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc
- [STC SE01943CH](https://openairdocs.org/stc/SE01943CH): Add the following approved fuels: unleaded automotive gasoline 87 minimum antiknock index, per ASTM Specification D-439 or D-4814 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227. Experimental Aircraft Association Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC ST00435AT](https://openairdocs.org/stc/ST00435AT): Overhaul/repair of the Delco starter adapter drive (P/N 1971890) used with Delco starters P/N's 11096656 and 1109660. Aerotech. Lists O-300 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 O-300 Series
- [STC SE1-201](https://openairdocs.org/stc/SE1-201): Installation of the Richter Aero Equipment Type B-4 or B-5 Temperature Probe. (O-360 SERIES (excl. A1C, C2B, C2D)). MidContinent Instru Co Inc. Lists O-300 Series
- [STC SE00164SE](https://openairdocs.org/stc/SE00164SE): Installation of Avglas components to modify carburetor air housing assemblies. McFarlane Aviation, Inc. Lists O-300 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE00262NY](https://openairdocs.org/stc/SE00262NY): Installation of Canadian Aero Manufacturing Pull Start Clutch, P/N 1971890-N or 1971890-M. Canadian Aero Manufacturing. Lists O-300 Series
- [STC SE8669SW](https://openairdocs.org/stc/SE8669SW): Installation of roller rocker arm. Performance Engineering
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists O-300 Series
- [STC SE3-663](https://openairdocs.org/stc/SE3-663): Install dry vacuum pump drive. Parker Hannifin Corp
- [STC SE1976SW](https://openairdocs.org/stc/SE1976SW): Manufacture of new cylinder barrels and rebarreling with original cylinder head. Gary Aerospace Corp. Lists O-300 Series
- [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists O-300 Series
- [STC SE2006CE](https://openairdocs.org/stc/SE2006CE): Add the following approved fuel: unleaded automotive gasoline, 87 minimum index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Also intermixing of aviation gasoline. Petersen Aviation Inc
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists O-300 Series
- [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. Lists O-300 Series

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