N-Number: N551X
Information Updated 11/23/2025
Aircraft Description
| N-Number | N551X | ||
| Serial Number | ONX0137 | Status | Valid |
| Manufacturer Name | THOMAS N HELM | Certificate Issue Date | 05/12/2020 |
| Model | SONEX ONEX | Expiration Date | 05/31/2023 |
| Type Aircraft | Fixed Wing Single Engine | Type Engine | Reciprocating |
| Pending Number Change | Dealer | ||
| Date Change Authorized | Mode S Code (base 8 / octal) | 51602457 | |
| MFR Year | Mode S Code (base 16 / hex) | A7052F | |
| Type Registration | Individual | Fractional Owner | No |
Registered Owner
| Name | HELM THOMAS N | ||
| Street | 1335 LORI DR | ||
| City | NEENAH | State | WI |
| County | WINNEBAGO COUNTY | Zip Code | 54956-1998 |
| Country | US | ||
Airworthiness
| Engine Manufacturer | A/W Date | // | |
| Engine Model | Classification | Unknown | |
| Category | |||
Other Owner Names
| None |
NTSB Records
| Date | Purpose | Phase | Severity | Fatal/Serious/Minor | Aircraft Damage | Location |
| 03/06/2009 | PERSONAL | MANEUVERING | FATAL(1) | 1/0/0 out of 1 | SUBSTANTIAL | OCALA, FL |
Deregistered Aircraft
| Deregistered Aircraft 1 of 2 | |||
| Aircraft Description | |||
| Serial Number | 076 | Certificate Issue Date | 09/04/2003 |
| Manufacturer Name | ELDREDGE KEVIN | Mode S Code (base 8 / oct) | 51602457 |
| Model | S51 | Mode S Code (base 16 / hex) | A7052F |
| Year Manufacturer | 2002 | Cancel Date | 04/12/2012 |
| Reason for Cancellation | Export To | ||
| Type Registration | Individual | ||
| Aircraft Registration prior to Deregistration | |||
| Name | HAMBLETON JOHN A | ||
| Street | 9420 NW 125TH AVE | ||
| City | OCALA | ||
| State | FL | Zip Code | 34482-8648 |
| County | Marion County | ||
| Country | |||
| Deregistered Airworthiness | |||
| Engine Manufacturer | Classification | Experimental | |
| Engine Model | Category | ||
| A/W Date | 05/17/2002 | ||
| Deregistered Other Owner Names | |||
| None | |||
| Deregistered Aircraft 2 of 2 | |||
| Aircraft Description | |||
| Serial Number | 75267 | Certificate Issue Date | 07/05/1994 |
| Manufacturer Name | BOEING | Mode S Code (base 8 / oct) | 51602457 |
| Model | A75N1 | Mode S Code (base 16 / hex) | A7052F |
| Year Manufacturer | Cancel Date | 07/10/1995 | |
| Reason for Cancellation | Export To | PARAGUAY | |
| Type Registration | Corporation | ||
| Aircraft Registration prior to Deregistration | |||
| Name | PARKER AVIATION ENTERPRISES INC | ||
| Street | BOX 311 | ||
| City | WARREN | ||
| State | VT | Zip Code | 05674 |
| County | Washington County | ||
| Country | US | ||
| Deregistered Airworthiness | |||
| Engine Manufacturer | Classification | Unknown | |
| Engine Model | Category | ||
| A/W Date | |||
| Deregistered Other Owner Names | |||
| None | |||