# NTSB CHI01LA188: Ayres S2R-G1, N3300L, Mohall, ND, June 23, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 23, 2001, 10:20 local (15:20 UTC) - Place: Mohall, ND - Coordinates: 48.760456, -101.509468 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=48.7605&lon=-101.5095&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report August 21, 2001 - Report: Approved by Office Director - Parties: FEDERAL AVIATION ADMINISTRATION - NTSB case key (mKey): 52581 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI01LA188 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/52581/pdf - Page: https://openairdocs.org/ntsb/CHI01LA188 ## Probable cause the pilot not maintaining clearance between the airplane and the truck when he backed the airplane off of the loading pad. Factors relating to this accident was the pilot's inadequate visual lookout and the truck. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, taxi - clearance - not maintained, pilot in command (cause) - visual lookout - inadequate, pilot in command (contributing factor) - object - vehicle (contributing factor) ## Analysis The pilot said he was using reverse thrust to back away from a loading area onto the ramp to taxi out for take off. The pilot said that a delivery truck pulled in behind him and stopped with his back to him. The airplane's right elevator struck the back of the truck. An examination of the airplane revealed no anomalies. ## Factual narrative On June 23, 2001, at 1020 central daylight time, an Ayers Corporation S2R-G1, N3300L, operated by a commercial pilot, sustained substantial damage when it collided with a truck. At the time of the accident, the airplane was backing out of a chemical loading pad at the Mohall Municipal Airport (HBC), Mohall, North Dakota, in preparation for flight. Visual meteorological conditions prevailed at the time of the accident. The aerial application flight was being conducted under the provisions of 14 CFR Part 137 without a flight plan. The pilot reported no injuries. The driver of the truck reported no injuries. The local flight was originating at the time of the accident. In his written statement, the pilot said he was using reverse thrust to back away from a loading area onto the ramp to taxi out for take off. The pilot said that a delivery truck pulled in behind him and stopped with his back to him. The airplane's right elevator struck the back of the truck. A Federal Aviation Administration inspector examined the airplane at HBC. The empennage was bent forward and twisted. The right elevator was broken. Aft fuselage tubes at the empennage were bent upward. One tube was severed. The fuselage skin on the "turtleback" was wrinkled. Flight control continuity was confirmed. An examination of the engine and other airplane systems revealed no anomalies. ## Aircraft - Registration: [N3300L](https://openairdocs.org/aircraft/N3300L), registered now, S/N G1-102 (OpenAirDocs) - Reported make and model: Ayres S2R-G1 - Registry model: [Ayres S2R-G1](https://openairdocs.org/model/ayres-s2r-g1) (registry code 0970219) (OpenAirDocs) - Category: Airplane - Serial number: GI-102 - Airframe hours: 1390 - Engines: Garrett TPE331-1-151A 665 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Hetts Agri Service - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, April 6, 2001, 100 hours before - Departed: HBC, MOHALL, ND - Destination: HBC, MOHALL, ND - Airport: HBC, Mohall Municipal Airport, runway 31, 3,121 × 60 ft ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2; last flight review May 2, 2001; seat: center; flight hours: 6,100 total, 400 in this make and model, 6,100 as pilot in command, 125 in the last 90 days, 100 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 14 knots - Visibility: 12 statute miles - Lowest ceiling: 15,000 ft overcast - Temperature: 73 °F, dew point 63 °F - Altimeter: 29.79 inHg - Observed at: MOT, 34 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20010623017059A](https://openairdocs.org/incident/20010623017059A), Jun 23, 2001: Mohall, ND, No damage. (-23) After loading the aircraft with chemical, the pilot used reverse thrust to back away from the loading area. This method is used to prevent taxiing over… 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.