N551X is a 2021 Thomas N Helm SONEX ONEX (fixed wing single engine) with serial number ONX0137, registered in Neenah, WI. Its FAA registration is valid and runs until May 31, 2027; the renewal window opens on Nov 30, 2026. It is powered by an Aeroconver AEROVEE rated at 80 hp. Its airworthiness certificate is in the experimental class (amateur-built), issued Jun 17, 2021.
210days left
Registration expiresMay 31, 2027
Today
Registration
- FAA status
- Valid registration
- Expires
- May 31, 2027
- Registrant type
- Individual
- Registered owner
- Individual owner, name not shown
- Location
- Neenah, WI
- Local FAA office (FSDO)
- Milwaukee FSDO (MKE FSDO) · (414) 486-2920
- Certificate issued
- May 12, 2020
- Last FAA action
- Jan 22, 2023
- Mode S code (hex)
- A7052F
- Mode S code (octal)
- 51602457
- Official record
- registry.faa.gov
Aircraft
- Manufacturer
- THOMAS N HELM
- Model
- SONEX ONEX
- Year manufactured
- 2021
- Serial number
- ONX0137
- Aircraft type
- Fixed wing single engine
- Engine type
- Reciprocating
- Engine
- AEROCONVER AEROVEE (80 hp)
- Engines / seats
- 1 / 1
- Weight class
- Up to 12,499 lb
- Airworthiness
- Experimental since Jun 17, 2021
- Approved operations
- Amateur-built
- Kit
- SONEX AIRCRAFT LLC ONEX
Public airports near Neenah
| Airport | ID | Distance | Tower | Fuel |
|---|---|---|---|---|
| Brennand Neenah, WI | 79C | 4 mi | Non-towered | 100LL |
| Appleton International Appleton, WI | KATW | 7 mi | Towered | 100LL, A |
| Wittman Regional Oshkosh, WI | KOSH | 13 mi | Towered | 100LL, A+ |
Straight-line distance from the registration city, from the FAA airport directory (NASR). The registry does not say where an aircraft is based.
Earlier registrations of this number
| Canceled | Aircraft | Serial | Year | Exported to | Same airframe today |
|---|---|---|---|---|---|
| Apr 12, 2012 | ELDREDGE KEVIN S51 | 076 | 2002 | ||
| Jul 10, 1995 | BOEING A75N1 | 75267 | PARAGUAY |
NTSB accident and incident records
| Date | Place | Aircraft (as NTSB recorded it) | Damage | Highest injury | NTSB no. |
|---|---|---|---|---|---|
| Mar 6, 2009 | Ocala, FL | Amateur-built Stewart other aircraft | Substantial | Fatal | ERA09LA184 |
From the NTSB aviation accident database (events since 2008, data through Oct 28, 2026), matched by N-number. An N-number can move between aircraft, so each row is checked against the serial number on the current registration.