Single-engine piston

N686X

Homebuilt HR II

Registered 1 NTSB/FAA record
Built
—
Serial
207
Class
Single-engine piston
Engines
Ama/Expr UNKNOWN ENG
Status
Current as of October 2026
Registered owner
N373Se LLC (LLC)
Based
Wilmington, DE
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Registration record

N686X on the FAA register

Type
Homebuilt HR II
Serial
207
Engines
Ama/Expr UNKNOWN ENG
Registered owner
N373Se LLC
Wilmington, DE
Certificate issued
2026-03-27
Airworthiness date
2003-02-14
Registration expires
2033-03-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A91B8E
Mode S (octal)
52215616
Seats (type)
2
Weight class
up to 12,499 lb
Kit
Harmon Rocket Llc RR II
Status
Current as of October 2026
Registry history

Timeline

  • 2033-03-31
    Registration expires (renewal due).
  • 2026-03-27
    Certificate of registration issued as N686X.
  • 2025-09-17
    Accident at Hayden, ID; damage: substantial.
  • 2003-02-14
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
Overview

About N686X

N686X is a Homebuilt HR II, serial number 207. The FAA register lists N373Se LLC as the registrant in Wilmington, Delaware. The current certificate of registration was issued on March 27, 2026 and expires on March 31, 2033.

The FAA aircraft reference file describes the type as a single-engine piston, one Ama/Expr UNKNOWN ENG engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated February 14, 2003.

N686X has 1 accident/incident record on file (most serious damage: substantial); details are below.

Safety record

Accident & incident history

2025-09-17 Accident · Hayden, ID Damage: Substantial NTSB · WPR25LA280
Reported aircraft: Weaver Harmon Rocket
Probable cause: The pilot s loss of directional control during landing, which resulted in a runway excursion and collision with terrain.
NTSB report ↗

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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Browse: Aircraft registered in Delaware· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.