# NTSB WPR20CA192: North Wing Uum Scout X-C, N417HW, Rochester, WA, June 23, 2020 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Class 4 · Data collection · Final report - Date: June 23, 2020, 08:15 local (15:15 UTC) - Place: Rochester, WA - Coordinates: 46.832778, -123.09139 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.8328&lon=-123.0914&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach: Inflight upset](https://openairdocs.org/ntsb-events/271) - Highest injury: Serious injuries - Injuries: 1 serious - 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): 101486 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR20CA192 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/101486/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=101486 - Page: https://openairdocs.org/ntsb/WPR20CA192 ## Probable cause The pilot’s failure to maintain adequate airspeed while on final approach in turbulent conditions, which resulted in an aerodynamic stall and subsequent hard landing. ## 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: [North Wing Uum SCOUT X-C, 4 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=060006R), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: airspeed](https://openairdocs.org/ntsb-findings/01062010): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [North Wing Uum SCOUT X-C, 2 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md?model=060006R), [All aircraft, 1,681 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md) - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [North Wing Uum SCOUT X-C, 1 case](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=060006R), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) - [Turbulence](https://openairdocs.org/ntsb-findings/03032000): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [North Wing Uum SCOUT X-C, 1 case](https://openairdocs.org/ntsb-findings/03032000/cases.md?model=060006R), [All aircraft, 92 cases](https://openairdocs.org/ntsb-findings/03032000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach: Inflight upset](https://openairdocs.org/ntsb-events/271) (defining event); cases with it: [North Wing Uum SCOUT X-C, 1 case](https://openairdocs.org/ntsb-events/271/sequence.md?model=060006R), [All aircraft, 74 cases](https://openairdocs.org/ntsb-events/271/sequence.md) - [Landing: Hard landing](https://openairdocs.org/ntsb-events/092); cases with it: [North Wing Uum SCOUT X-C, 1 case](https://openairdocs.org/ntsb-events/092/sequence.md?model=060006R), [All aircraft, 2,102 cases](https://openairdocs.org/ntsb-events/092/sequence.md) - [Landing-flare/touchdown: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [North Wing Uum SCOUT X-C, 4 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=060006R), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The student pilot reported that while on final approach for landing he encountered turbulence. After traveling out from behind trees near the runway, he encountered a strong upward force on the right wing which pushed the aircraft to the left and increased altitude about 20 ft. The pilot reported that the aircraft stalled, and he did not increase power fast enough to recover from the stall before the airplane landed hard, which substantially damaged the wing frame. The pilot reported that there were no mechanical failures or malfunctions with the aircraft that would have precluded normal operation. ## Factual narrative The student pilot reported that while on final approach for landing, he encountered turbulence. After traveling out from behind trees, he encountered a strong upward force on the right wing which pushed the aircraft to the left and increased altitude about 20 ft. The pilot reported that the aircraft stalled, and he did not increase power fast enough to recover from the stall before the airplane landed hard which substantially damaged the wing frame. The pilot reported that there were no mechanical failures or malfunctions with the aircraft that would have precluded normal operation. ## Aircraft - Registration: [N417HW](https://openairdocs.org/deregistered/N417HW-2020-12-05), registration cancelled 2020-12-05, S/N LS9006, built 2010 (OpenAirDocs) - Reported make and model: North Wing UUM INC Scout X-C - Registry model: [North Wing Uum SCOUT X-C](https://openairdocs.org/model/north-wing-uum-scout-x-c) (registry code 060006R) (OpenAirDocs) - Registry engine: [Rotax 912UL series](https://openairdocs.org/engine/rotax-912ul-series) (registry code 55571, 4 cycle) (OpenAirDocs) - Category: Weight-shift - Serial number: LS9006 - Year built: 2010 - Airframe hours: 54 - Engines: Rotax 912 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Special light-sport (Special) - Last inspection: Condition, March 1, 2020 - Departed: 8W9, Rochester, WA - Destination: 8W9, Rochester, WA - Airport: 8W9, R & K Skyranch, runway 34, 2,480 × 35 ft, grass/turf - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; injuries: serious; student; medical: sport pilot; seat: front; restraint: 4-point; flight hours: 50 total, 30 in this make and model, 30 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 360° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 48 °F - Altimeter: 30.06 inHg - Observed at: KOLM, 11 nm away ## Docket (4 files) The files NTSB released with the investigation on July 7, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=101486. 2.1 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11761978&FileExtension=pdf&FileName=NTSB%20Form%206120_Redacted-Rel.pdf - Record of conversation (item 2, PDF, 1 page, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11388115&FileExtension=pdf&FileName=Record%20of%20Conversation%20student%20pilot-Rel.pdf - Record of email (item 3, PDF, 1 page, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11388147&FileExtension=pdf&FileName=Record%20of%20Email%20WPR20CA192-Rel.pdf - Accident pictures (item 4, PDF, 1 page, 148 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12432653&FileExtension=pdf&FileName=WPR20CA192%20Accident%20Pictures%201-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.