CEN20LA339

NTSB accident investigation · Czech Sport Sportcruiser · Gober, TX · August 14, 2020

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
August 14, 2020, 07:56 local (12:56 UTC)
Place
Gober, TX
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N467SCCzech Sport Sportcruiser
Defining event
Maneuvering: Aerodynamic stall/spin
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA
FAA report
20200814020989A
Case key
101802

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

On this page

Probable cause

The student pilot’s improper recovery from a power-off stall. Contributing to the accident was the flight instructor’s failure to properly monitor the student pilot during the stall recovery.

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.

Action: incorrect action performancePersonnel issues › Action/decision · Student/instructed pilotCzech Sport Aircraft A S SPORTCRUISER: 1 caseAll aircraft: 1,386 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 student pilot was performing a power-off stall and recovery maneuver. The flight instructor was instructing the student through the maneuver as he was performing it. The student performed the maneuver steps correctly until the stall occurred. During the recovery, the student pitched the airplane’s nose down into a near vertical attitude and applied full power instead of pitching the airplane 10o nose down which was the proper recovery attitude, and the airplane entered an inverted spin. The flight instructor reported that she was caught off guard by the student’s actions during the recovery and immediately took control of the airplane. She attempted to recover the airplane from the spin but was unable to regain airplane control. The instructor then deployed the airframe parachute, and the airplane landed in an open field. Surface wind caught the parachute, causing the airplane to be dragged across the field. As a result, the empennage and wings sustained substantial damage.

Factual narrative

On August 17, 2020, about 0756 central daylight time, a Czech Sport Sportcruiser airplane, N467SC, was substantially damaged when it was involved in an accident near Gober, Texas. The flight instructor and student pilot were seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 instructional flight. According to the student pilot, he was performing a stall recovery maneuver after inducing a power-off stall. The student recalled that, when he felt the nose of the airplane begin to drop, he pitched the airplane nose down and applied full power. The student stated that, as the airspeed increased, he was unable to pitch the nose up or arrest the descent. The flight instructor stated that, in guiding the student in performing a power off-stall, she directed him to pitch the airplane 10° nose high and hold right rudder to keep the airplane coordinated until it stalled. When the stall occurred, she instructed the student to pitch the airplane nose down 10o, increase power, and partially raise the flaps. The instructor recalled that the student pitched the airplane in a near-vertical attitude and added full power. The student turned the airplane’s yoke, and the airplane began to spin. The instructor took control of the airplane and attempted to recover the airplane from the spin but was unable to regain directional control. Data from the airplane’s onboard avionics revealed that, at 1256:27, the airplane was configured with 30° flaps was 15° nose high with its airspeed slowing through the expected stall speed of 37 knots. The airplane’s pitch decreased, and, at 1256:32, the airplane was 60° nose low. At that time, the airplane began a roll to the right. At 1256:34, the airplane was 80° nose low and had rolled through 90° of right bank. The airplane continued to roll right until the airplane was inverted with a pitch attitude of about 50° nose low. The flight instructor deployed the airframe parachute, and the airplane landed in an open field. Impact signatures showed that, after landing, the airplane was dragged across the field due to surface wind that had caught the parachute. The airplane flipped, and the empennage and wings sustained substantial damage. Neither pilot reported any flight control malfunction.

Aircraft

Registration
N467SC
Reported as
Czech Sport Sportcruiser (No Series)
Category
Airplane, amateur-built
Serial number
C0571
Built
2016
Engine
Rotax 912ULS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Thrust Flight
Registered owner
Hr Aviation Llc
Airworthiness certificate
Special, Special light-sport (Special)
Departed
ADS · Dallas, TX
Destination
ADS · Dallas, TX
Flight plan
VFR
Equipment
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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
35
Certificates
Private, Commercial, Flight instructor
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Seat
Right
Flight hours
300 total · 161 in this make and model · 34 in the last 90 days
Role
Student pilot
Age
29
Certificate
Student
Seat
Left
Flight hours
2 total · 2 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 70 °F
Altimeter
29.89 inHg
Observed at
KTKI, 30 nm away

Docket · 5

The files NTSB released with the investigation on August 25, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 9.2 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.