# NTSB WPR21LA281: Piper PA-20, N2712A, Cascade, ID, July 18, 2021 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: July 18, 2021, 10:30 local (16:30 UTC) - Place: Cascade, ID · KU70 Runway 30 - Coordinates: 44.492333, -116.01477 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.4923&lon=-116.0148&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: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: FSDO - NTSB case key (mKey): 103511 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR21LA281 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103511/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103511 - Page: https://openairdocs.org/ntsb/WPR21LA281 ## Probable cause The pilot's failure to maintain directional control during the landing roll, which resulted in a runway excursion and collision with terrain. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Piper PA-20, 25 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=7102002), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/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: [Piper PA-20, 20 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=7102002), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/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: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Piper PA-20, 21 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=7102002), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot of the tail wheel equipped airplane reported that, during the landing roll the airplane veered left. The pilot attempted corrective action and applied power to perform a go around, but the airplane exited the left side of the runway. The airplane turned hard to the right and skidded to a stop. The left wing and left elevator impacted the ground and were substantially damaged. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N2712A](https://openairdocs.org/deregistered/N2712A-2023-02-21), registration cancelled 2023-02-21, S/N 20-898, built 1952 (OpenAirDocs) - Reported make and model: PIPER PA-20 - Registry model: [Piper PA-20](https://openairdocs.org/model/piper-pa-20) (registry code 7102002) (OpenAirDocs) - Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs) - Category: Airplane - Serial number: 20-898 - Year built: 1952 - Airframe hours: 2774 - Engines: LYCOMING O-320-A2B 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 25, 2020, 2,774 hours before - Departed: MYL, McCall, ID - Destination: U70, Cascade, ID - Airport: U70, Cascade, runway 12/30, 4,300 × 60 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; private; airplane ratings: single-engine land; medical: basicmed, with waivers/limitations; last flight review March 26, 2021; seat: left; flight hours: 231 total, 202 in this make and model, 135 as pilot in command, 7 in the last 90 days, 4 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 70 °F, dew point 43 °F - Altimeter: 30.21 inHg - Observed at: KMYL, 24 nm away - METAR: KMYL 181551Z AUTO 00000KT 10SM CLR 21/06 A3021 RMK AO2 SLP179 T02110056 ## 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 20210718010889A](https://openairdocs.org/incident/20210718010889A), Jul 18, 2021: Piper PA-20, Cascade, ID, Substantial damage. On 07/18/2021 at approximately 1630Z a PA20 was conducting a landing at Cascade airport (U70) when the aircraft departed the left side of the runway causing… ## Docket (2 files) The files NTSB released with the investigation on May 17, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103511. 3.3 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13782420&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photo damage (item 2, PDF, 1 page, 737 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13705907&FileExtension=pdf&FileName=Photo%20Damage%20WPR21LA281-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.