GAA17CA379

NTSB accident investigation · American General Acft AG5 · Rio Vista, CA · July 3, 2017

Accident · No injuriesData collectionFinal report
Date
July 2, 2017, 17:00 local (Jul 3, 2017, 00:00 UTC)
Place
Rio Vista, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N321MWAmerican General Acft AG5
Defining event
Approach-VFR go-around: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report September 22, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20170702024059A
Case key
95487

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 student pilot’s failure to maintain directional control during a go-around in gusting wind conditions.

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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAmerican General Acft AG5B: 1 caseAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · Student/instructed pilotAmerican General Acft AG5B: 1 caseAll aircraft: 9,295 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationAmerican General Acft AG5B: 2 casesAll aircraft: 1,199 cases

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 reported that, during his second low approach, the airplane was stable at 75 knots and full flaps and about 20 ft above ground level (agl). He added, that about 5 to 10 ft agl, he applied full power and began to "slowly" retract the flaps. Encountering what he described as "wind shear," he reported that the airplane became "vertical" and that he lost directional control. He added that he immediately banked to the right and applied full right rudder. Subsequently, the airplane's left wing struck the ground. The airplane came to rest off the right side of the runway. The airplane sustained substantial damage to the left wing. The student pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The student pilot reported checking the airport's automated weather observation system, which was reporting wind from 120° at 12 knots, before the approach. He further reported the sky condition as clear, temperature 84°F, dewpoint 53°F, and wind gusts to 20 knots. The pilot selected runway 15. As a recommendation, the student pilot reported that he should have avoided areas with gusts greater than 10 knots.

Factual narrative

The student pilot reported that, during his second low approach, the airplane was stable at 75 knots and full flaps, about 20 ft. above the ground. He added, that about 5 to 10 ft. above the ground, he applied full power and began to "slowly" retract the flaps. Encountering what he described as "wind shear," he reported that, the airplane became "vertical" and he lost directional control. He added that, he immediately banked to the right and applied full right rudder, subsequently, the airplane's left wing struck the ground. The airplane came to rest off the right side of the runway. The airplane sustained substantial damage to the left wing. The student pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The student pilot reported checking the airport's automated weather observation system (AWOS), which was reporting wind from 120° at 12 knots, prior to the approach. He further reported the sky condition as clear, temperature 84°F, dewpoint 53°F, and wind gusts to 20 knots. The pilot selected runway 15. As a recommendation, the student pilot reported that he should have avoided areas with gusts greater than 10 knots.

Aircraft

Registration
N321MW
Reported as
American General Acft AG5 (B)
Category
Airplane
Serial number
10105
Built
1991
Airframe hours
1,880
Engine
Lycoming O&VO-360 SER, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal; Standard, Utility
Departed
CCR · Concord, CA
Destination
O88 · Rio Vista, CA
Airport
O88 · Rio Vista Muni, runway 15, 2,199 × 60 ft, asphalt
Equipment
Electronic flight bag or handheld device, Auto-pilot, ADS-B, Stall warning system, Onboard weather

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
58
Injuries
None
Certificate
Student
Medical
Class 3, Waiver time limited special
Last flight review
June 12, 2017
Seat
Left
Restraint
4-point
Flight hours
210 total · 162 in this make and model · 210 as pilot in command · 31 in the last 90 days · 16 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 15 knots
Temperature
82 °F, dew point 55 °F
Altimeter
29.84 inHg
Observed at
KSUU, 12 nm away

Docket · 2

The files NTSB released with the investigation on August 31, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.3 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.