WPR18CA146

NTSB accident investigation · Ayres S2R G10 · Marysville, CA · May 22, 2018

Accident · No injuriesData collectionFinal report
Date
May 22, 2018, 16:30 local (23:30 UTC)
Place
Marysville, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N32064Ayres S2R G10
Defining event
Approach: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA FSDO
Case key
97318

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 pilot’s failure to maintain clearance from a truck while on final approach after the airplane encountered a downdraft, which resulted in the subsequent failure of the right main landing gear and loss of directional control.

Findings · 4

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.

Object/animal/substance: ground vehicleEnvironmental issues › Physical environment · Effect on operationAyres S2R-G10: 1 caseAll aircraft: 132 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAyres S2R-G10: 1 caseAll aircraft: 3,958 casesProbable cause
Wind: downdraftEnvironmental issues › Conditions/weather/phenomena · Effect on operationAyres S2R-G10: 1 caseAll aircraft: 178 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 commercial pilot reported that he had been applying rice seed to a field throughout the day and was returning to land on a dirt airstrip. During the approach, the airplane encountered a downdraft, and the right main landing gear (MLG) impacted the top of a seed dispensing truck that was positioned near the approach end of the airstrip. The pilot continued the landing, and upon touchdown, the right MLG collapsed, the airplane veered right, crossed over a ditch, and then came to rest in a field. The airplane sustained substantial damage to the right MLG attachment point to the fuselage. The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot landed to the north and reported that the wind was gusting to about 8 to 15 knots.

Factual narrative

The commercial pilot reported that he had been applying rice seed to a field throughout the day and was returning to land on a dirt airstrip. During the approach, the airplane encountered a downdraft and the right main landing gear impacted the top of a seed dispensing truck that was positioned near the approach end of the airstrip. The pilot continued the landing and upon touchdown, the right main landing gear collapsed, the airplane veered to the right, crossed over a ditch and came to rest in a field. The airplane sustained substantial damage to the right main landing gear attaching point to the fuselage. The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot landed to the north and reported the wind was gusting about 8 to 15 knots.

Aircraft

Registration
N32064
Reported as
Ayres S2R G10 (G10)
Category
Airplane
Serial number
G10-113
Engine
Garrett Tup-331-10-, 740 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Airworthiness certificate
None
Departed
O52 · Yuba City, CA
Destination
Marysville, CA
Equipment
None

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
65
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
January 25, 2017
Seat
Single
Restraint
Lap only
Flight hours
25,000 total · 12,000 in this make and model · 25,000 as pilot in command · 50 in the last 90 days · 30 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 55 °F
Altimeter
29.73 inHg
Observed at
KBAB, 113 nm away

Docket · 4

The files NTSB released with the investigation on November 1, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 MB in all.

Other investigations on N32064 · 1

Matched to the same aircraft by N-number and date.