# NTSB WPR11CA402: Piper PA-18-150, N4376Z, Emmett, ID, August 22, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 22, 2011, 11:00 local (17:00 UTC) - Place: Emmett, ID - Coordinates: 43.8525, -116.539169 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.8525&lon=-116.5392&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 October 17, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 81572 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA402 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81572/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81572 - Page: https://openairdocs.org/ntsb/WPR11CA402 ## Probable cause The pilot's failure to maintain directional control during landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [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-18-150, 98 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=7101828), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Piper PA-18-150, 160 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=7101828), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/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-18-150, 109 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=7101828), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Piper PA-18-150, 35 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=7101828), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Piper PA-18-150, 115 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=7101828), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported that during landing in a tailwheel-equipped airplane, the airplane bounced and settled back onto the runway in a two-point landing configuration. Subsequently, the airplane suddenly veered to the right. Despite the pilot's control inputs, the airplane ground looped and exited the right side of the runway. Examination of the airplane revealed that the left wing sustained substantial damage. The pilot reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative The pilot reported that following an uneventful landing in a tailwheel equipped airplane, the airplane bounced and settled back onto the runway in a two-point landing configuration. Subsequently, the airplane suddenly veered to the right. Despite the pilot's control inputs, the airplane ground looped and exited the right side of the runway. Examination of the airplane by the pilot revealed that the left wing sustained structural damage. The pilot reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N4376Z](https://openairdocs.org/aircraft/N4376Z), registered now, S/N 18-8698, built 1968 (OpenAirDocs) - Reported make and model: PIPER PA-18-150 - Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18-8698 - Airframe hours: 4618 - Engines: LYCOMING O-320 SERIES 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Kevin Hochstetler - Registered owner: Labbee Tyler J - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 10, 2011 - Departed: Lewiston, ID - Destination: S78, Emmett, ID - Airport: S78, Emmett Municipal Airport, runway 28, 3,250 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 32; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: front; flight hours: 873 total, 527 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 80° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 52 °F - Altimeter: 29.97 inHg - Observed at: EUL, 15 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 20110822018889A](https://openairdocs.org/incident/20110822018889A), Aug 22, 2011: Piper PA-18-150, Emmett, ID, Substantial damage. The aircraft had left mead, WA the morning of 08-22-2011 enroute to new Mexico. The pilot had stopped in lewiston, ID for fuel and continued the flight. The… ## Docket (1 files) The files NTSB released with the investigation on September 8, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81572. 1.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40353696&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.