# NTSB SEA01LA156: Schweizer G-164B, N3632T, Twin Falls, ID, August 22, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 22, 2001, 09:50 local (15:50 UTC) - Place: Twin Falls, ID - Coordinates: 42.409866, -114.59085 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.4099&lon=-114.5909&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 17, 2001 - Report: Approved by Office Director - Parties: FAA/FSDO - NTSB case key (mKey): 53084 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA01LA156 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53084/pdf - Page: https://openairdocs.org/ntsb/SEA01LA156 ## Probable cause Nose over during the landing roll for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Nose over, landing - roll - reason for occurrence undetermined (cause) ## Analysis The pilot reported that during the landing roll, at approximately 35 to 40 mph, the aircraft developed a substantial shake. The tail then lifted and the aircraft nosed over and came to rest inverted. After the aircraft was righted and during the tow to the hangar, the brakes were tested and found to function with no evidence of a mechanical failure or malfunction. The pilot later reported that he did not apply the brakes nor did the tires slide. ## Factual narrative On August 22, 2001, about 0950 mountain daylight time, a Schweizer Aircraft G-164B, N3632T, registered to and operated by Ken Spray LLC, as a 14 CFR Part 137 aerial application flight, nosed over during the landing roll at Joslin Field - Magic Valley Regional airport, Twin Falls, Idaho. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local flight. The aircraft was substantially damaged and the commercial pilot, the sole occupant, was not injured. The pilot reported that during the landing roll on runway 7, at approximately 35 to 40 mph, the aircraft developed a "substantial shake..." The tail then lifted and the aircraft nosed over and came to rest inverted. The pilot later reported that he did not apply the brakes nor did the tires slide. The aircraft was righted, and towed to the hanger. During the tow, the brakes were tested. No evidence of a mechanical failure or malfunction was found. ## Aircraft - Registration: [N3632T](https://openairdocs.org/aircraft/N3632T), registered now, S/N 772B, built 1985 (OpenAirDocs) - Reported make and model: Schweizer G-164B - Registry model: [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b) (registry code 8059055) (OpenAirDocs) - Registry engine: [Pratt & Whitney TW-S1-S3-S4](https://openairdocs.org/engine/pratt-whitney-tw-s1-s3-s4) (registry code 52019, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 772B - Airframe hours: 5400 - Engines: P&W 1340-AN-2 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Ken Spray LLC - Airworthiness certificate: Special, Restricted (Special) - Last inspection: 100 hour, May 5, 2001, 35 hours before - Departed: TWF, Twin Falls, ID - Airport: TWF, Joslin Field, runway 7, 8,703 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review May 29, 2001; seat: center; flight hours: 13,626 total, 10,857 in this make and model, 13,091 as pilot in command, 377 in the last 90 days, 135 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 54 °F - Altimeter: 30.00 inHg - Observed at: TWF ## 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 20010822023899A](https://openairdocs.org/incident/20010822023899A), Aug 22, 2001: Scwzer G164B, Twin Falls, ID, No damage. (-23) On landing, pilot noticed a chattering in the landing gear brakes. He could not stop the tail from rising up with control input and the aircraft nosed… ## Other investigations on N3632T (3) 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 SEA06CA123](https://openairdocs.org/ntsb/SEA06CA123), Jun 17, 2006: Schweizer G-164B (N3632T), Murtaugh, ID, substantial damage. Probable cause: The pilot's excessive brake application during the landing roll, which resulted in a nose over. - [NTSB SEA96LA068](https://openairdocs.org/ntsb/SEA96LA068), Mar 13, 1996: Schweizer G-164B (N3632T), Point Of Rocks, WY, destroyed, 1 fatal. Probable cause: the pilot's inadvertent VFR flight into instrument meteorological conditions (IMC), and his failure to maintain aircraft control due to spatial disorientation. Factors relating to the accident were:… - [NTSB FTW86LRD23](https://openairdocs.org/ntsb/FTW86LRD23), Aug 14, 1986: Grumman G-164B (N3632T), Lecompte, LA, substantial damage 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.