# N552SM: 1946 Engineering & Research ERCOUPE 415-C

- Status: Valid registration
- Airframe: [Engineering & Research ERCOUPE 415-C](https://openairdocs.org/model/engineering-research-ercoupe-415-c) (registry code 0420312, 2 seats)
- Engine: [Continental A&C75 series](https://openairdocs.org/engine/continental-a-c75-series) (registry code 17005)
- Serial number: 1908
- Year built: 1946
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: August 16, 1956
- Certificate issued: May 30, 2026
- Expires: May 31, 2033
- Mode S code: A70875
- Registered owner: [Mondloch Jesse R](https://openairdocs.org/faa-owner/MONDLOCH%20JESSE%20R)
- Location: [Freedom, WI](https://openairdocs.org/faa-place/WI/Freedom)
- Owner type: Individual
- Owner's area on the map: 44.3110° N, 88.2441° W: Placed by OpenAirDocs at the center of ZIP code 54130, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=552SM
- Page: https://openairdocs.org/aircraft/N552SM

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Continental A&C75 model are included.

## ADs that may apply (OpenAirDocs): 9 in force

### Matched by airframe (Engineering & Research ERCOUPE 415-C)

None in force.

### Matched by engine (Continental A&C75 series)

- [AD 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 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 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 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 81-07-06](https://openairdocs.org/ad/81-07-06): AC Fuel Pumps · Continental Motors A-65-1, A-65-12, A-65-12F and 60 more. Effective Apr 1, 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 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969
- [AD 69-09-01](https://openairdocs.org/ad/69-09-01): Eisemann Magnetos · Eisemann Magnetos, 2A4-45-B2, 2A4-49-B2 and 158 more
- [AD 46-36-01](https://openairdocs.org/ad/46-36-01): Piston Pins · Continental Motors A-65-1, A-65-12, A-65-12F and 32 more

## Information bulletins (advisory) (3 in force)

- [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
- [SAIB CE-98-21R1](https://openairdocs.org/saib/CE-98-21R1): . Issued Jun 10, 1998

## NTSB investigations

None matched to N552SM.

## FAA accident and incident reports

None matched to N552SM.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## Service difficulty reports on N552SM not matched to an aircraft (1)

They name N552SM, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR SIIA004K](https://openairdocs.org/sdr/SIIA004K), Mar 11, 2002: ACCESS DOOR. MISSING. RIGHT ENGINE OIL ACCESS DOOR DISCOVERED MISSING ON POST-FLIGHT INSPECTION. IN-FLIGHT SEPARATION PROBABLY OCCURRED APPROXIMATELY 2.5 HOURS INTO FLIGHT WHEN CREW 

## STCs that may be installed (OpenAirDocs) (24)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (Continental A&C75 series)

- [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. Lists A75-3
- [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 A75-3
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc. Lists A75-3
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp. Lists A75-3
- [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. Lists A75-3
- [STC SE00533SE](https://openairdocs.org/stc/SE00533SE): Installation of Real Gasket Corporation Continental Engine Pushrod Tube Modification. Real Gaskets Tennessee. Lists A75-3
- [STC SE4247SW](https://openairdocs.org/stc/SE4247SW): Regrind crankshaft to .020 undersize on crankpin and main journals. Continental Motors, Inc
- [STC SE4271SW](https://openairdocs.org/stc/SE4271SW): Alteration of crankcase to accept alternate front main bearing P/N530058. Continental Motors, Inc
- [STC SE3330NM](https://openairdocs.org/stc/SE3330NM): Continental valve cover gasket. Real Gaskets Tennessee. Lists A75-3
- [STC SE1589GL](https://openairdocs.org/stc/SE1589GL): Installation of Slick Aircraft Products Magneto Model 4202 or Model 4302. Champion Aerospace LLC. Lists A75-3
- [STC SE09002SC](https://openairdocs.org/stc/SE09002SC): Regrind Teledyne Continental crankshafts, to .020-inch undersize on crankpin and main journals. Aircraft Specialties Services Inc
- [STC SE1780NM](https://openairdocs.org/stc/SE1780NM): Installation of Precise Flight standby vacuum system (SVS III). Precise Flight Inc. Lists A75-3
- [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. Lists A75-3
- [STC SE634GL](https://openairdocs.org/stc/SE634GL): Superseded by STC SE01943CH. Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index. EAA Aviation Foundation
- [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
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp
- [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
- [STC SE2030CE](https://openairdocs.org/stc/SE2030CE): Add approved fuel: unleaded automotive gasoline, 87 minimum anitknock index and leaded automotive gasoline, 88 minimum antiknock index(RON+MON)/2. Petersen Aviation Inc. Lists A75-3
- [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
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec
- [STC SE4CE](https://openairdocs.org/stc/SE4CE): Motorola alternator A12NK451. Steven E/Robert F Bell. Lists A75-8F
- [STC SE984SW](https://openairdocs.org/stc/SE984SW): Delco 55A ampere alternator. (C85 SERIES Suffix F Series). Waldrop Lee A
- [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

## Related

- Other Engineering & Research ERCOUPE 415-C aircraft: https://openairdocs.org/model/engineering-research-ercoupe-415-c/aircraft.md
- The Continental A&C75 series engine: https://openairdocs.org/engine/continental-a-c75-series.md

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