Zephyrhills Municipal Airport
Aircraft Accident/Incident Report

Zephyrhills, Florida 33542
Tuesady, August 28, 2007 18:25 EDT

NTSB Narrative Summary Released at Completion of Accident

Witnesses said that they saw an ultralight-type aircraft doing circles overhead, and that they heard a loud noise like a "pop" and then looked up and saw the aircraft with its wings folded straight up. One witness said that she then saw the aircraft roll over two times, and then it dove straight to the ground. In general, operational limitations of weight-shift-aircraft are: 60 degrees angle of bank; 30 to 45 degrees pitch up and down; positive Gs at all times, with no sustained zero Gs and negative Gs; and no aerobatics allowed. Postcrash examinations of the airframe, flight controls, and engine, did not reveal any evidence of preaccident anomalies. Examination of the wreckage revealed evidence of an in-flight breakage of the wing's structural components under high negative g-loading, consistent with the aircraft being operated outside its parameters.

NTSB Probable Cause Narrative

Improper in-flight maneuvering that resulted in the weight-shift-aircraft's design limits being exceeded, wing failure, and a loss of control.

Event Information

Type of Event Accident
Event Date 8/28/2007
Event Day of the Week Tuesday
Time of Event 1825
Event Time Zone Eastern Daylight Time
Event City Zephyrhills
Event State FLORIDA
Event Country --
Zipcode of the event site 33542
Event Date Year 2007
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 281341N
Event Location Longitude 0820921W
Event Location Airport Zephyrhills Municipal Airport
Event Location Nearest Airport ID ZPH
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 2
Degrees magnetic from airport --
Airport Elevation 89
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1850 Eastern Standard Time
Direction of event from weather observation facility (degrees) 153
Weather Observation Facility ID LAL
Elevation of weather observation facility 142
Distance of event from weather observation facility (units?) 15
Time Zone of the weather observation EST
Lighting Conditions Day
Lowest Ceiling Height 25000
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 15
Air Temperature at event time (in degrees celsius) 29
Dew Point at event time (in degress fahrenheit) 22
Wind Direction (degrees magnetic) 100
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 10
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.98
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal 2
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 26122
NTSB Notification Source Pasco County Sheriffs Departme
NTSB Notification Date Aug 28 2007 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Sep 30 2009 1:17PM
User who most recently changed record kenj
Basic weather conditions Visual Meteorological Cond
FAA District Office Orlando, Florida

Aircraft Involved

Aircraft #1

Aircraft Registration Number N304AP
NTSB Number MIA07LA136
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Destroyed
Aircraft Fire Ground
Aircraft Explosion Ground
Aircraft Manufacturer's Full Name Apollo North America Inc
Aircraft Model Tundra
Aircraft Series Identifier --
Aircraft Serial Number KLM0004
Certified Max Gross Weight 1040
Aircraft Category --
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Conditional
Date of Last Inspection Jun 12 2007 12:00AM
Airframe hours since last inspection 50
Airframe Hours 358
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Apollo North America, Inc.,
Aircraft Owner Street Address 39440 South Avenue
Aircraft Owner City Zephyrhills
Aircraft Owner State FL
Aircraft Owner Country USA
Aircraft Owner Zipcode 33542
Operator is an individual? No
Operator Name Apollo North America, Inc.,
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 39440 South Avenue
Operator City Zephyrhills
Operator State FL
Operator Country USA
Operator Zip code 33542
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code ZPH
Departure City Zephyrhills
Departure State FL
Departure Country USA
Departure Time 1800
Departure Time Zone EDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code ZPH
Destination City --
Destination State --
Destination Country USA
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Sep 30 2009 1:17PM
User who most recently changed record kenj
Since inspection or accident Time of Accident
Event Location Runway Number and Location 22
Runway Length 5000
Runway Width 100
Sight Seeing flight No
Air Medical Flight No
Medical Flight --