# N3504H: Engineering & Research 415-CD, registration cancelled 1992-02-05

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 5, 1992
- Status when cancelled: Triennial form not returned
- Airframe: [Engineering & Research 415-CD](https://openairdocs.org/model/engineering-research-415-cd) (registry code 0420304)
- Data sheets: [TCDS A-718](https://openairdocs.org/tcds/A-718) (OpenAirDocs)
- Serial number: 4129
- Type of aircraft: Fixed wing single engine
- Certificate issued: February 10, 1982
- Last registry action: December 21, 1991
- Mode S code: A3E7B9
- Owner when cancelled: [Clyde David N](https://openairdocs.org/faa-owner/CLYDE%20DAVID%20N)
- Location: [Hereford, TX](https://openairdocs.org/faa-place/TX/Hereford)
- Owner type: Individual
- Owner's area on the map: 34.8999° N, 102.5148° W: Placed by OpenAirDocs at the center of ZIP code 79045, within about 19 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N3504H
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=3504H
- Page: https://openairdocs.org/deregistered/N3504H-1992-02-05

From the FAA registry file of November 5, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Engineering & Research 415-CD: https://openairdocs.org/model/engineering-research-415-cd.md

## 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 FTW90FA092](https://openairdocs.org/ntsb/FTW90FA092), Apr 9, 1990: Ercoupe 415CD (N3504H), Hereford, TX, destroyed, 1 fatal. Probable cause: INADVERTENT STALL. FACTORS WERE MAXIMUM GROSS WEIGHT EXCEEDED BY THE PILOT, THE PILOT'S IMPAIRMENT DUE TO DRUGS, AND THE PILOT'S LACK OF TOTAL EXPERIENCE.

## 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 19900409007889A](https://openairdocs.org/incident/19900409007889A), Apr 9, 1990: Univar 415CD (N3504H), Hereford, TX, Destroyed, 1 fatal. Apparent loss of control during departure climb. Nose pitched straight down, impacted terrain and burned.

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