# N7UN: 1974 Harmon MONOPLANE, registration cancelled 2013-05-06

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 6, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Harmon MONOPLANE](https://openairdocs.org/model/harmon-monoplane) (registry code 0560806)
- Engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501)
- Serial number: 1
- Year built: 1974
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental
- Certificate issued: June 17, 2005
- Last registry action: June 17, 2008
- Mode S code: A951AB
- Owners when cancelled: [Bylsma Michael R](https://openairdocs.org/faa-owner/BYLSMA%20MICHAEL%20R), [Bylsma Roberta S](https://openairdocs.org/faa-owner/BYLSMA%20ROBERTA%20S)
- Location: [Wiggins, CO](https://openairdocs.org/faa-place/CO/Wiggins)
- Owner type: Co-owned
- Owner's area on the map: 40.1356° N, 104.0819° W: Placed by OpenAirDocs at the center of ZIP code 80654, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N7UN
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=7UN
- Page: https://openairdocs.org/deregistered/N7UN-2013-05-06

From the FAA registry file of October 29, 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 Harmon MONOPLANE: https://openairdocs.org/model/harmon-monoplane.md

## NTSB investigations (2)

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 FTW79DPD03](https://openairdocs.org/ntsb/FTW79DPD03), Oct 15, 1978: Harmon 1 (N7UN), Gainesville, TX, substantial damage
- [NTSB FTW75DPA12](https://openairdocs.org/ntsb/FTW75DPA12), Oct 20, 1974: Harmon Monopl (N7UN), Sherman, TX, substantial damage

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