# Continental IO-470-D

- Type: Engine model (FAA registry)
- Registry code: 17345
- Manufacturer (registry): CONT MOTOR
- Model: IO-470-D
- Engine type: Reciprocating
- Power: 260 hp
- Data sheet: [TCDS 3E1](https://openairdocs.org/tcds/3E1) (OpenAirDocs)
- Holder: Continental Aerospace Technologies, Inc.
- Installed in: 7 registered aircraft
- Page: https://openairdocs.org/engine/continental-io-470-d

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 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 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 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 97-21-02](https://openairdocs.org/ad/97-21-02): Cylinders · Continental Motors E165-2, E165-3, E165-4 and 61 more. Effective Oct 27, 1997
- [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 93-08-17](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 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 80-06-05](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
- [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 70-14-07](https://openairdocs.org/ad/70-14-07): Fuel Injection Pump · Continental Motors IO-360-A, IO-360-C, IO-360-D and 25 more. Effective Nov 22, 1974
- [AD 72-20-02](https://openairdocs.org/ad/72-20-02): Cylinders · Continental Motors IO-470-D, IO-470-E, IO-470-F and 10 more. Effective Oct 2, 1974
- [AD 67-01-04](https://openairdocs.org/ad/67-01-04): Oil Filters · Full flow oil filter (Superior Flow STC SA401SW or 2 others). Effective Jan 2, 1967
- [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 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
- [AD 97-15-01](https://openairdocs.org/ad/97-15-01) (historical): Pistons · Teledyne Continental Motors E165-2, E165-3, E165-4 and 61 more

## Information bulletins (advisory) (6)

- [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020
- [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 (7)

- [N259JG](https://openairdocs.org/aircraft/N259JG): [Gaber Jerome D](https://openairdocs.org/faa-owner/GABER%20JEROME%20D), [Las Cruces, NM](https://openairdocs.org/faa-place/NM/Las%20Cruces), S/N 2007-001
- [N272DG](https://openairdocs.org/aircraft/N272DG): [Deutscher Kevin W](https://openairdocs.org/faa-owner/DEUTSCHER%20KEVIN%20W), [Chandler, AZ](https://openairdocs.org/faa-place/AZ/Chandler), built 2024, S/N 0272-2024
- [N30T](https://openairdocs.org/aircraft/N30T): [Aero Quest LLC](https://openairdocs.org/faa-owner/AERO%20QUEST%20LLC), [Olive Branch, MS](https://openairdocs.org/faa-place/MS/Olive%20Branch), built 1962, S/N 310G-0031
- [N310MB](https://openairdocs.org/aircraft/N310MB): [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 1961, S/N 310-0147
- [N391E](https://openairdocs.org/aircraft/N391E): [Dodge City, KS](https://openairdocs.org/faa-place/KS/Dodge%20City), built 1960, S/N 39131, Registration pending
- [N847AF](https://openairdocs.org/aircraft/N847AF): [Boise, ID](https://openairdocs.org/faa-place/ID/Boise), built 1957, S/N 32917, Registration pending
- [N997TX](https://openairdocs.org/aircraft/N997TX): [Peso Consulting LLC](https://openairdocs.org/faa-owner/PESO%20CONSULTING%20LLC), [Lexington, TX](https://openairdocs.org/faa-place/TX/Lexington), S/N 182-54369

## 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 MIA79FA008](https://openairdocs.org/ntsb/MIA79FA008), Nov 3, 1978: Cessna 421B (N391E), Miami, FL, 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.

- [Incident 20001229024989I](https://openairdocs.org/incident/20001229024989I), Dec 29, 2000: Cessna 310G (N30T), Wichita, KS, Minor damage. (-23) At 02:53Z on December 28, 2000 the pilot of N30T was landing on runway 1R at Wichita Mid-Continent Airport, Wichita, KS after an IFR flight from…

## Service difficulty reports (12)

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

- [SDR CA150317002](https://openairdocs.org/sdr/CA150317002), Mar 5, 2015: CYLINDER. DELAMINATED. (CAN) DURING A ROUTINE INSPECTION, HIGH METAL CONTENT FOUND IN ENGINE OIL SCREEN. CONTINUED INSPECTION OF THE ENGINE FOUND CYLINDER NR 4 NOT ABLE TO OBTAIN HIGH
- [SDR 2012FA0000141](https://openairdocs.org/sdr/2012FA0000141), Mar 3, 2012: SUPPORT. CRACKED. DURING A ROUTINE TAKEOFF, NOTICED THAT THE LT PROPELLER SPINNER WAS OSCILLATING UP AND DOWN APPROX 4.0" AT THE SPINNER TIP. AN IMMEDIATE RETURN FOR LANDING AND 
- [SDR CA040917006](https://openairdocs.org/sdr/CA040917006), Sep 3, 2004: LEG ASSY. BROKEN. (CAN) WHEN TURNING TO ALIGN AIRCRAFT FOR TAKEOFF ON THE GRASS STRIP AT CPE7 THE LT MAIN LANDING GEAR LEG SNAPPED OFF AT THE OB CHANNEL. THE AIRCRAFT COLLAPSED, 
- [SDR KKI2003F00000](https://openairdocs.org/sdr/KKI2003F00000), Jan 28, 2003: PIN. WRONG PART. DURING ANNUAL INSPECTION, IT WAS FOUND THAT FEATHERING PIN ASSY MOUNTED ON THIS PROPELLER IS WRONG PART. PART AS INSTALLED IS MOUNTED ON TOP OF TWO RIVETS IN SP
- [SDR CA021119007](https://openairdocs.org/sdr/CA021119007), Oct 30, 2002: COUNTERWEIGHT. CRACKED. (CAN) PROPELLER RECEIVED FOR AD 97-18-02 REPETITIVE INSPECTION. CRACK DISCOVERED DURING M.P.I. INSPECTION OF THE CLAMPS. AT ONE TIME DURING THE HISTORY OF THE P
- [SDR 2002FA0000175](https://openairdocs.org/sdr/2002FA0000175), Jan 30, 2002: ENGINE. FAILED. WHILE PERFORMING A STATIC GROUND RUN, AT APPROX. 2200 RPMS THE ENGINE SHOOK VIOLENTLY. THE ENGINE WAS QUICKLY SHUT DOWN AND FUEL SHUT-OFF VALVE SELECTED TO THE 
- [SDR 2001FA0000341](https://openairdocs.org/sdr/2001FA0000341), Aug 22, 2001: PLATE. WRONG PART. ENGINE HAD LOST OIL PRESSURE DURING FLIGHT. AFTER A SAFE LANDING IT WAS DETERMINED THAT THE OIL HAD LEAKED OUT FROM THE BETWEEN THE OIL COOLER PLATE AND THE ENG
- [SDR CA000811004](https://openairdocs.org/sdr/CA000811004), Jul 20, 2000: CRANKSHAFT. SEPARATED. (CAN) AIRCRAFT WAS IN A CRUISE ATTITUDE, IN PREPARATION TO DISEMBARK SKYDIVERS, WHEN PILOT NOTICED AN ENGINE VIBRATION FOLLOWED BY A BANG, ENGINE CAME TO A SUDD
- [SDR 20000817SH005](https://openairdocs.org/sdr/20000817SH005), Jul 19, 2000: CYLINDER. FAILED. LEFT ENGINE WOULD NOT DEVELOP FULL POWER AT TAKEOFF. AIRCRAFT CRASH LANDED DUE TO POOR PERFORMANCE. INSPECTION OF ENGINE REVEALED THAT NR 2 CYLINDER HAD ''ZERO'
- [SDR CA000928020](https://openairdocs.org/sdr/CA000928020), Jul 11, 2000: FUEL LINE. BROKEN. (CAN) BOTH LT AND RT FUEL PRESSURE LINES WERE MADE LOCALLY BY OTHERS OUT OF -2 SOFT COPPER. COPPER MOST LIKELY WORK HARDENED AND CRACKED. CORRECT P/N HOSES AS A
- [SDR 20000426SH032](https://openairdocs.org/sdr/20000426SH032), Mar 24, 2000: CONDUIT. FAILED. MIXTURE CONTROL CONDUIT IN ENGINE NACELLE BETWEEN MIXTURE CONTROL AND WING ROOT. CONDUIT THAT HOUSES CABLE FATIGUED AND BROKE CAUSING HOUSING TO MOVE AND MIXTUR
- [SDR 96ZZZX5889](https://openairdocs.org/sdr/96ZZZX5889), Nov 25, 1996: PISTON PIN. MISMFG. BOUGHT 6 EACH 539467 PISTON PINS. 4 OF THEM WERE WAY TOO LONG. 2 OF THEM WERE CORRECT. RETURNED AND FOUND OUT ALL OF THEM IN STOCK THAT WERE LONG HAD HG CODE ON

## STCs that may be installed (OpenAirDocs) (47)

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 SE96SO](https://openairdocs.org/stc/SE96SO): Installation of two (2) Roto-Master Turbochargers Model 3DT5FF10J2, P/N 600572-00 (formerly Rajay Model 315F10, P/N RJ0080-102). TALCO Aviation
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [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 SE00561NY](https://openairdocs.org/stc/SE00561NY): Replacement of Fuel Injection System with Carburetted System. Aerotec Engines Limited
- [STC SE09217SC](https://openairdocs.org/stc/SE09217SC): Installation of modified fuel injector nozzles. General Aviation Modifications Inc
- [STC SE00114SE](https://openairdocs.org/stc/SE00114SE): Replaces Teledyne-Continental Part Number 646277 lifter bodies. B & B Aviation LLC
- [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc
- [STC SE02261CH](https://openairdocs.org/stc/SE02261CH): Increase engine displacement from 470 cubic inches to 520 cubic inches in the Teledyne Continental Motors IO-470-D, -E, -F, -H, -L, -M, -N, -R, -S, -U, -V, -VO engines models with a flat rating of 260 HP. Cygnet Aerospace Corp
- [STC SE92WE](https://openairdocs.org/stc/SE92WE): Installation of oil fitting (AN-823-5D) in rocker box cover. Airwolf Filter Corporation
- [STC SE2-984](https://openairdocs.org/stc/SE2-984): Modification of Continental Piston Part No. 627738 (IO-470). Continental Motors, Inc. Lists IO-470 Series
- [STC SE26WE](https://openairdocs.org/stc/SE26WE): Piston ring 250000, 250000+2W and250000+10W on Continental E Series piston 534895, O-470 piston 534895, 626992 and 537883 and IO-470 piston534895. Continental Motors, Inc. Lists IO-470 Series
- [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
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc
- [STC SE910SW](https://openairdocs.org/stc/SE910SW): The manufacturer of pistons, valve guides, and parts. Continental Motors, Inc
- [STC SE94SW](https://openairdocs.org/stc/SE94SW): Modification of Continental IO-470 Pistons P/N 627738, P/N 539814, and P/N 631481 compression ring grooves from present keystone configuration to rectangular configuration. Continental Motors, Inc. Lists IO-470 Series
- [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 SE552GL](https://openairdocs.org/stc/SE552GL): Incorporation of a fuel flow transducer. Shadin Avionics
- [STC SA02261CH](https://openairdocs.org/stc/SA02261CH): Increase engine displacement from 470 cubic inches to 520 cubic inches. Chuck Ney Enterprises
- [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 SE152SO](https://openairdocs.org/stc/SE152SO): Modification of throttle body location. Array Paul S. Lists IO-470 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-470 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-470 Series
- [STC SE09319SC](https://openairdocs.org/stc/SE09319SC): Modify oil pan adding a new oil sump drain. Texas Skyways Inc. Lists IO-470 Series
- [STC SE3517NM](https://openairdocs.org/stc/SE3517NM): Replacement of the original engine oil screen with an external mounted full flow oil adapter and spin-on filter. Timberman Allen E
- [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 SE775NE](https://openairdocs.org/stc/SE775NE): Installation of Auto-Vac-2 auxiliary vacuum system. Raymond Ives
- [STC SE2450CE](https://openairdocs.org/stc/SE2450CE): Add leaded and unleaded automotive gasoline, 91 minimum antiknock index, (RON+MON)/2. Petersen Aviation Inc
- [STC SE7432SW](https://openairdocs.org/stc/SE7432SW): Installation of Performance Engineering roller rocker arms. Performance Engineering
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-470 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-470 Series
- [STC SE939GL](https://openairdocs.org/stc/SE939GL): Installation of oil filler tube extension. Rapco, Inc
- [STC SE1642SW](https://openairdocs.org/stc/SE1642SW): Modified cylinder assembly G-626820C or G-625859. Gary Aerospace Corp. Lists IO-470 Series
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists IO-470 Series
- [STC SE69WE](https://openairdocs.org/stc/SE69WE): 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 SE16WE](https://openairdocs.org/stc/SE16WE): Bendix S-600 low tension ignition system. Salinas Engine Works. Lists IO-470 Series
- [STC SE387SW](https://openairdocs.org/stc/SE387SW): Modification of ring grooves on Continental Motors pistons 539814(3 ring) and 627738 (4 ring). Van Der Horst Corp of America. Lists IO-470 Series
- [STC SE73SO](https://openairdocs.org/stc/SE73SO): Continental GIO-470 engine oil sump assembly 628943 and oil pump suction tube assembly 628660. Aircraft Modification Engineering Company. Lists IO-470 Series
- [STC SE82SO](https://openairdocs.org/stc/SE82SO): Engine sump reworked to provide15 1/8-quart total oil capacity. Riley Aeronautics Corp. Lists IO-470 Series

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