Flight Tracker
N478SX
2004 OLSON HAROLD D SONEX
Fixed wing single engine · Reciprocating · Experimental
1 NTSB record for this tail number, including substantial damage. See the full record below.

Registration

Registered Owner
HARDY TRAV D
Registrant Type
Individual
Location
LAKE MILLS, WI
Status
Valid
Certificate Issued
Feb 7, 2025
Airworthiness Date
Jul 7, 2004
Expires
Feb 29, 2032
Approved Operations
Amateur Built

Airframe

Manufacturer
OLSON HAROLD D
Model
SONEX
Year
2004
Serial Number
478SX
Seats
2
Engines
1
Max Weight
Up to 12,499 lb
Cruise Speed
-
Type Certificate
-
Kit Manufacturer
SONEX LTD
Kit Model
SONEX

Powerplant

Engine Manufacturer
AMA/EXPR
Engine Model
UNKNOWN ENG
Type
Reciprocating
Power
-

Live Flight Status

Checking live traffic…

Coverage depends on ground receiver reception and is not a complete picture of traffic.

Transponder & Tracking

Mode S Code (Hex)
A5E078
Mode S Code (Octal)
51360170

The hex code is the aircraft's ICAO 24-bit address, broadcast by its ADS-B transponder. It is the key used to match live position reports to this registration.

NTSB Accident & Incident Record

Nov 21, 2004 Accident Substantial Oconomowoc, WI
Injuries1 serious
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause

The loss of engine power due to a fatigue fracture of the crankshaft. An additional cause to the accident was the pilot/builder's failure to verify the dimensions of the shrink-fit crankshaft components prior reassembling the engine. A factor to the accident was the ditch encountered during the forced landing.

NTSB CHI05CA032