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NTSB accident investigation · TL Ultralight Sro TL-3000 Sirius · South St. Paul, MN · April 8, 2016

Accident · No injuriesData collectionFinal report
Date
April 8, 2016, 16:30 local (21:30 UTC)
Place
South St. Paul, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N726TTL Ultralight Sro TL-3000 Sirius
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed · report June 1, 2016
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
Minneapolis FSDO (FAA)
FAA report
20160408003939A
Case key
93001

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 a proper landing flare in gusty wind conditions, which resulted in a hard landing and substantial damage to the firewall.

Findings · 3

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: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedTL Ultralight Sro TL-3000 SIRIUS: 1 caseAll aircraft: 1,285 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Ability to respond/compensateTL Ultralight Sro TL-3000 SIRIUS: 1 caseAll aircraft: 1,199 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 he encountered gusty wind conditions and a "sudden low level wind shear" during the landing flare and touched down hard. During the landing roll, the pilot noticed that he could not steer the airplane to the left, but he was able to stop the airplane on the runway. During a postaccident inspection, evidence of a propeller strike was also observed. The firewall was substantially damaged. An automated weather observing system, about the time of the accident, at the accident airport reported the wind 330 degrees true at 16 knots gusting to 28 knots. The pilot reported that he landed on runway 34. The pilot did not report any mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that he encountered gusty wind conditions and a "sudden low level wind shear" during the landing flare and touched down hard. During the landing roll, the pilot noticed that he could not steer the airplane to the left, but he was able to stop the airplane on the runway. During a postaccident inspection, evidence of a propeller strike was also observed. The firewall was substantially damaged. An automated weather observing system, about the time of the accident, at the accident airport reported the wind 330 degrees true at 16 knots gusting to 28 knots. The pilot reported that he landed on runway 34. The pilot did not report any mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N726T
Reported as
TL Ultralight Sro TL-3000 Sirius (NO SERIES)
Category
Airplane
Serial number
13SI77
Built
2013
Airframe hours
463.1
Engine
Rotax 912 ULS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Air Associates of Missouri
Registered owner
Swan Air LLC.
Airworthiness certificate
Special, Special light-sport (Special)
Last inspection
100 hour · November 3, 2015
Departed
DBQ · Dubuque, IA
Destination
SGS · South St. Paul, MN
Airport
SGS · South St Paul Muni-Richard E F, runway 34, 4,002 × 100 ft, asphalt
Equipment
Electronic multifunction display, Auto-pilot, Airframe parachute, ADS-B, Onboard weather, Handheld GPS, Electronic primary flight display

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
57
Injuries
None
Certificate
Sport Pilot
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
December 30, 2015
Seat
Left
Restraint
4-point
Flight hours
71.5 total · 13.6 in this make and model · 36 as pilot in command · 27 in the last 90 days · 9.1 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 16 knots, gusting 28
Visibility
10 statute miles
Lowest ceiling
5,500 ft broken
Temperature
34 °F, dew point 10 °F
Altimeter
30.06 inHg
Turbulence
Light
Observed at
KSGS

Docket · 2

The files NTSB released with the investigation on May 18, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 628 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.