Pilot Debrief

ULTRALITE SRO Stingsport near Clermont, FL — 2018-11-17

Final reportERA19LA050
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Date
2018-11-17
Location
Clermont, FL, USA
Aircraft
ULTRALITE SRO Stingsport
Registration
N494N
Category
Airplane
Highest injury
Minor
Fatalities
0
Phase of flight
Cruise

Probable cause

An inflight failure of the airplane’s horizontal stabilizer.

NTSB narrative

The pilot stated that he was in cruise flight when he received an automatic dependent surveillance-broadcast traffic alert of traffic approaching from his one o'clock position and closing at "a high rate of speed." The pilot went on to describe control inputs and airplane attitudes during his response to the perceived threat, which ultimately resulted in a loss of control and aerodynamic spin. During the pilot’s attempted recovery from the spin, the nose of the airplane pitched forward uncontrolled and the airplane entered a high-speed, nose-down descent. It is likely that during these remedial actions to regain control, the structure surrounding the horizontal stabilizer failed, and the stabilizer separated from the airplane. The pilot then successfully deployed the airplane’s ballistic parachute system, and it landed in a pasture. Examination of the failed structure surrounding the horizontal stabilizer revealed areas of delamination with dry glass fibers indicative of improper material layup with inadequate resin application. It could not be determined to what extent the inflight separation of the horizontal stabilizer was due to this defect, or whether the pilot’s control inputs during the response to the traffic warning, departure from controlled flight, and subsequent attempted recovery attempt imparted forces onto the horizontal stabilizer that were beyond its nominal structural capability.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have maintained power to avoid spin after traffic alert.

NTSB coding

Evidence available

  • ADS-B / radar
  • Photos
  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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