# NTSB WPR18CA146: Ayres S2R G10, N32064, Marysville, CA, May 22, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 22, 2018, 16:30 local (23:30 UTC) - Place: Marysville, CA - Coordinates: 39.290554, -121.532218 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.2906&lon=-121.5322&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 18, 2019 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: FAA FSDO - NTSB case key (mKey): 97318 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR18CA146 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97318/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97318 - Page: https://openairdocs.org/ntsb/WPR18CA146 ## 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 NTSB's coded findings; those marked are part of the probable cause. - [Attention/monitoring: monitoring environment](https://openairdocs.org/ntsb-findings/02021545): Personnel issues › Psychological · Pilot (probable cause); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-findings/02021545/cases.md?model=0970217), [All aircraft, 809 cases](https://openairdocs.org/ntsb-findings/02021545/cases.md) - [Object/animal/substance: ground vehicle](https://openairdocs.org/ntsb-findings/03022025): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-findings/03022025/cases.md?model=0970217), [All aircraft, 132 cases](https://openairdocs.org/ntsb-findings/03022025/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=0970217), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: downdraft](https://openairdocs.org/ntsb-findings/03034035): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-findings/03034035/cases.md?model=0970217), [All aircraft, 178 cases](https://openairdocs.org/ntsb-findings/03034035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-events/400/sequence.md?model=0970217), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md) - [Approach: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) (defining event); cases with it: [Ayres S2R-G10, 2 cases](https://openairdocs.org/ntsb-events/490/sequence.md?model=0970217), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md) - [Landing: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=0970217), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=0970217), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Ayres S2R-G10, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=0970217), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## 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](https://openairdocs.org/aircraft/N32064), registered now, S/N G10-113 (OpenAirDocs) - Reported make and model: AYRES CORPORATION S2R G10 (G10) - Registry model: [Ayres S2R-G10](https://openairdocs.org/model/ayres-s2r-g10) (registry code 0970217) (OpenAirDocs) - Category: Airplane - Serial number: G10-113 - Engines: 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 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; 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 ## Other investigations on N32064 (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB LAX98LA116](https://openairdocs.org/ntsb/LAX98LA116), Mar 19, 1998: Ayres S2R (N32064), Willows, CA, substantial damage. Probable cause: The pilot's failure to maintain adequate altitude/clearance from the wires. ## Docket (4 files) The files NTSB released with the investigation on November 1, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97318. 1.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 727 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467966&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Pilot's Statement (item 2, .PDF, 257 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467967&FileExtension=.PDF&FileName=Pilot%27s%20Statement-Master.PDF - Release of Aircraft Wreckage, NTSB Form 6120.15 (item 3, .PDF, 127 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467968&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Master.PDF - Photos (item 4, .PDF, 3 photos, 390 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467969&FileExtension=.PDF&FileName=Photos-Master.PDF From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.