# N551X — THOMAS N HELM SONEX ONEX
> **2021** Fixed Wing Single-Engine · Reciprocating · Owner: HELM THOMAS N · NEENAH, WI
## Aircraft
- **N-Number:** N551X
- **Serial Number:** ONX0137
- **Manufacturer:** THOMAS N HELM
- **Model:** SONEX ONEX
- **Year manufactured:** 2021
- **Type:** Fixed Wing Single-Engine
- **Engine type:** Reciprocating (01 engines)
- **Seats:** 001
- **Weight class:** CLASS 1
- **Mode S code (hex):** `A7052F`
## Owner
- **Name:** HELM THOMAS N
- **Type of registrant:** Individual
- **Location:** NEENAH, WI 549561998, US
## Registration
- **Status:** Valid
- **Certificate issued:** 2020-05-12
- **Last action:** 2023-01-22
- **Expiration:** 2027-05-31
## Source
- [FAA Aircraft Inquiry](https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=551X)
- [ADS-B Exchange live tracking](https://globe.adsbexchange.com/?icao=a7052f)
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