# N18192: 1941 Monocoupe 90AF

- Status: Valid registration
- Airframe: [Monocoupe 90AF](https://openairdocs.org/model/monocoupe-90af) (registry code 5810107, 2 seats)
- Engine: [Franklin 4AC199D&E series](https://openairdocs.org/engine/franklin-4ac199d-e-series) (registry code 27009)
- Data sheets: [TCDS A-306](https://openairdocs.org/tcds/A-306) (Monocoupe Corporation) (OpenAirDocs)
- Serial number: A-821
- Year built: 1941
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: April 3, 1956
- Certificate issued: July 28, 2005
- Expires: October 31, 2027
- Mode S code: A14811
- Registered owner: [Sondey Charles S](https://openairdocs.org/faa-owner/SONDEY%20CHARLES%20S)
- Location: [Stow, MA](https://openairdocs.org/faa-place/MA/Stow)
- Owner type: Individual
- Owner's area on the map: 42.4299° N, 71.5116° W: Placed by OpenAirDocs at the center of ZIP code 01775, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=18192
- Page: https://openairdocs.org/aircraft/N18192

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 Franklin 4AC199D&E model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Monocoupe 90AF)

None in force.

### Matched by engine (Franklin 4AC199D&E series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N18192.

## FAA accident and incident reports

None matched to N18192.

## 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.

## STCs that may be installed (OpenAirDocs) (15)

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 airframe (Monocoupe 90AF)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA00081NY](https://openairdocs.org/stc/SA00081NY): Installation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector. Alcor LLC
- [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC
- [STC SA02594SE](https://openairdocs.org/stc/SA02594SE): SkyView HDX Instrumentation and Autopilot System manufactured. Dynon Avionics
- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc
- [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc
- [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc
- [STC SA2-952](https://openairdocs.org/stc/SA2-952): Installation of fiberglass covering. Razorback Fabrics Inc. Lists 90 Series
- [STC SA5159NM](https://openairdocs.org/stc/SA5159NM): Installation of chip detector system. Northwest Aircraft Inc. Lists 90 Series
- [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc
- [STC SA308EA](https://openairdocs.org/stc/SA308EA): Installation of carburetor ice detection system 105AP in single and twin engine aircraft and single engine helicopters powered by Continental, Franklin, and Lycoming type engines equipped with Marvel-Schebler MA-2, MA-3, MA-4, MA-4-5, MA-6 and HA-6 series carburetors. (Normal,Utility and Acrobatic Category airplanes and helicopters equipped with engines and carburetors as described.). Alfred R Puccinelli
- [STC SA4-1024](https://openairdocs.org/stc/SA4-1024): Ceconite 101 covering of complete airplane. Cooper Engineering Corporation. Lists 90 Series

## Related

- Other Monocoupe 90AF aircraft: https://openairdocs.org/model/monocoupe-90af/aircraft.md
- The Franklin 4AC199D&E series engine: https://openairdocs.org/engine/franklin-4ac199d-e-series.md

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