CEN09CA334

NTSB accident investigation · Aerotrike Safari · Lake City, MI · May 23, 2009

Accident · Minor injuriesData collectionFinal report
Date
May 23, 2009, 18:05 local (22:05 UTC)
Place
Lake City, MI
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N8035WAerotrike Safari
Defining event
Initial climb: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report November 9, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration, Grand Rapids FSDO
FAA report
20090523010659A
Case key
73957

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 failure to maintain adequate airspeed during the initial climb.

Findings · 2

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.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedAero Trike SAFARI: 1 caseAll aircraft: 1,681 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAero Trike SAFARI: 1 caseAll aircraft: 9,295 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 of the experimental weight-shift-control aircraft was performing a takeoff from runway 18 when the accident occurred. The pilot stated that during initial climb, about 10-12 feet above the ground, the aircraft began to descend and drift off of the runway centerline. The pilot was not able to correct for the descent and lateral drift before the aircraft landed hard on its rear landing gear. The right wing tip impacted the terrain as the aircraft bounced twice and tipped onto its side. The wing and its king post were substantially damaged during the accident. The pilot stated that there were no preimpact mechanical malfunctions or failures. According to the pilot, the local surface winds were 3-5 knots from the west-southwest. A nearby weather station reported that the surface winds were 7 knots from the northwest.

Factual narrative

The experimental weight-shift-control aircraft was performing a takeoff from runway 18 when the accident occurred. The pilot stated that during initial climb, about 10-12 feet above the ground, the aircraft began to descend and drift off the runway centerline. The pilot was not able to correct for the descent and lateral drift before the aircraft landed hard on its rear landing gear. The right wingtip impacted the terrain as the aircraft bounced twice and tipped onto its side. The wing and its king post were substantially damaged during the accident. The pilot stated that there were no pre-impact mechanical malfunctions or failures. According to the pilot, the local surface winds were 3-5 knots from the west-southwest. A nearby weather station reported that the surface winds were 7 knots from the northwest.

Aircraft

Registration
N8035W
Reported as
Aerotrike Safari
Category
Weight-shift
Serial number
M5439499
Airframe hours
183.27
Engine
Rotax 503 DCDI, 50 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 13, 2009
Departed
Y91 · Lake City, MI
Destination
Y91 · Lake City, MI
Airport
Y91 · Home Acres Sky Ranch Airport, runway 18, 2,550 × 150 ft, grass/turf

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
52
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
November 16, 2007
Seat
Front
Flight hours
157 total · 69 in this make and model · 87 as pilot in command · 1 in the last 90 days · 1 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 52 °F
Altimeter
30.04 inHg
Observed at
KCAD, 11 nm away

Docket · 1

The files NTSB released with the investigation on June 23, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 MB 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.