WPR13LA398

NTSB accident investigation · Strong Dream Machine · Bieber, CA · September 3, 2013

Accident · Serious injuriesLimited investigationFinal report
Date
September 3, 2013, 08:20 local (15:20 UTC)
Place
Bieber, CA
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9032YStrong Dream Machine
Defining event
Takeoff: Miscellaneous/other
Weather
Visual (VMC) · Day
Status
Completed · report October 19, 2015
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20130903017549A
Case key
87980

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot’s inability to maintain aircraft control during takeoff after several suspension lines became entangled in, and were subsequently severed by, the propeller blades.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

AircraftAircraft › Aircraft structures · FailureStrong J/Strong B DREAM MACHINE: 1 caseAll aircraft: 72 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeStrong J/Strong B DREAM MACHINE: 1 caseAll aircraft: 933 cases
Performance/control parametersAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleStrong J/Strong B DREAM MACHINE: 1 caseAll aircraft: 1,269 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that, during takeoff in the powered parachute, he felt a slight tug on the riser lines, which then increased in intensity. He was unable to maintain control of the powered parachute, which subsequently collided with trees. Postaccident examination of the wreckage revealed that, during takeoff, several of the parachute's suspension lines became entangled in the propeller for reasons that could not be determined and were then severed. As a result, it was not possible for the pilot to maintain aircraft control.

Factual narrative

On September 3, 2013, at 0820 Pacific daylight time, an experimental Dream Machine powered parachute, N9032Y, impacted trees during takeoff near Bieber, California. The sport pilot/owner operated the powered parachute under the provisions of 14 Code of Federal Regulations Part 91, as a personal flight. The pilot received serious injuries, and the passenger received minor injuries. The powered parachute sustained substantial damage to the fuselage. Visual meteorological conditions prevailed for the local area flight that departed from a private airstrip, and no flight plan had been filed. The pilot reported to a Federal Aviation Administration (FAA) inspector that during takeoff, he felt a slight tug on the riser lines, which increased in intensity. He was unable to maintain control of the powered parachute, and it subsequently collided with trees. According to the FAA inspector, the postaccident examination of the wreckage indicated that during takeoff, several of the suspension lines from the parachute became entangled in the propeller for reasons that could not be determined, and the suspension lines had been severed at the same length. The pilot did not fill-out or return the National Transportation Safety Board Pilot/Operator Accident/Incident Report Form 6120.1.

Aircraft

Registration
N9032Y
Reported as
Strong Dream Machine
Category
Powered parachute
Serial number
6203
Built
2001
Airframe hours
800
Engine
Rotax 582, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
Bieber, CA
Destination
Bieber, CA

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
71
Injuries
Serious
Certificate
Sport Pilot
Medical
Sport pilot
Seat
Front
Flight hours
2,500 total · 2,000 in this make and model · 40 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
57 °F, dew point 45 °F
Altimeter
30.04 inHg
Observed at
AAT, 33 nm away

Docket · 2

The files NTSB released with the investigation on September 15, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 138 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.