# NTSB WPR24LA136: Cessna 170B, N1657D, Scappoose, OR, April 30, 2024 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: April 29, 2024, 17:46 local (Apr 30, 2024, 00:46 UTC) - Place: Scappoose, OR - Coordinates: 45, -122 - Nearby events: https://openairdocs.org/map.md?lat=45.0000&lon=-122.0000&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 194171 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR24LA136 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/194171/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=194171 - Page: https://openairdocs.org/ntsb/WPR24LA136 ## Probable cause The pilot’s failure to maintain aircraft control during the landing roll in gusting wind conditions. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 170B, 5 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=2072306), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cessna 170B, 91 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2072306), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [Cessna 170B, 13 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=2072306), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Cessna 170B, 12 cases](https://openairdocs.org/ntsb-events/400/sequence.md?model=2072306), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 170B, 84 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072306), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Cessna 170B, 29 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2072306), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot reported that after the airplane touched down on the runway, it encountered a strong wind gust at a groundspeed of about 25 mph, which lifted the left wing and tail. Subsequently, the right wing struck the ground, and the airplane nosed over, which resulted in substantial damage to the right-wing lift strut. The pilot reported no preimpact mechanical failures or malfunctions that would have precluded normal operation. At the time of the accident, the pilot was landing on runway 33 with wind variable from 250° to 270° at 10 knots, gusting to 26 knots. ## Aircraft - Registration: [N1657D](https://openairdocs.org/aircraft/N1657D), registered now, S/N 20299, built 1952 (OpenAirDocs) - Reported make and model: CESSNA 170B - Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 20299 - Year built: 1952 - Airframe hours: 4390 - Engines: Continental C-145-2 145 hp reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Flying Aces LLC - Airworthiness certificate: Standard, Utility - Last inspection: Annual, April 25, 2024, 2.9 hours before - Departed: 3S7, Manzanita, OR - Destination: Same as departure - Airport: SPB, Scappoose, runway 15/33, 5,100 × 100 ft, asphalt - Equipment: Stall warning system, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: none; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review January 21, 2024; seat: left; restraint: lap only; flight hours: 7,345 total, 140 in this make and model, 4,453 as pilot in command, 798 in the last 90 days, 48 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 290° at 8 knots, gusting 17 - Visibility: 10 statute miles - Lowest ceiling: 8,000 ft broken - Temperature: 55 °F, dew point 36 °F - Altimeter: 30.13 inHg - Observed at: KSPB, 59 nm away - METAR: KSPB 300053Z AUTO 29008G17KT 10SM BKN080 13/02 A3013 RMK AO2 SLP203 T01280022 $ ## 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 20240429004209A](https://openairdocs.org/incident/20240429004209A), Apr 29, 2024: Cessna 170B, Scappoose, OR, Substantial damage. After landing roll out pilot lost control of aircraft. Airplane flipped upsidedown. Pilot loss control of the aicraft due to tailwind. ## Docket (2 files) The files NTSB released with the investigation on November 19, 2024, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=194171. 30.9 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 29.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17189365&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Accident photographs (item 2, PDF, 2 pages, 1.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17189613&FileExtension=pdf&FileName=Accident%20Photographs-Rel.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.