# NTSB ANC11CA034: Cessna 180J, N9951N, Kenai, AK, May 18, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 18, 2011, 12:03 local (20:03 UTC) - Place: Kenai, AK - Coordinates: 60.573055, -151.234451 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=60.5731&lon=-151.2345&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 August 30, 2011 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: FAA - NTSB case key (mKey): 79153 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC11CA034 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/79153/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=79153 - Page: https://openairdocs.org/ntsb/ANC11CA034 ## Probable cause The pilot's failure to maintain directional control during the landing roll, resulting in a ground loop. ## 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: [Cessna 180J, 24 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2072622), [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: [Cessna 180J, 26 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2072622), [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: [Cessna 180J, 29 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072622), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Dragged wing/rotor/float/other](https://openairdocs.org/ntsb-events/093); cases with it: [Cessna 180J, 3 cases](https://openairdocs.org/ntsb-events/093/sequence.md?model=2072622), [All aircraft, 319 cases](https://openairdocs.org/ntsb-events/093/sequence.md) ## Analysis The pilot reported that during landing the airplane ground looped to the right, striking the left wing on the runway. The airplane sustained substantial damage to the left wing. The pilot reported no mechanical anomalies with the airplane that would have precluded normal operation. ## Factual narrative The private pilot reported that during landing the airplane ground-looped to the right, dragging the left wing on the ground. He said there were no preaccident mechanical anomalies with the airplane. The airplane sustained substantial damage to the left wing during the ground-loop. ## Aircraft - Registration: [N9951N](https://openairdocs.org/aircraft/N9951N), registered now, S/N 18052606, built 1975 (OpenAirDocs) - Reported make and model: CESSNA 180J - Registry model: [Cessna 180J](https://openairdocs.org/model/cessna-180j) (registry code 2072622) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18052606 - Airframe hours: 2030 - Engines: CONT MOTOR O-470 SERIES 230 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Ackerman Dennis W - Registered owner: Ackerman Dennis W - Airworthiness certificate: Standard, Normal - Last inspection: Annual, March 10, 2011 - Departed: KMRI, Anchorage, AK - Destination: KENA, Kenai, AK - Airport: KENA, Kenai, runway 01L, 7,575 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review May 19, 2009; seat: left; flight hours: 298 total, 223 in this make and model, 214 as pilot in command, 3 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 90° at 10 knots - Visibility: 10 statute miles - Temperature: 54 °F - Altimeter: 29.82 inHg - Observed at: ENA ## 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 20110518008879A](https://openairdocs.org/incident/20110518008879A), May 18, 2011: Cessna 180J, Kenai, AK, Substantial damage. Landed on 01 left runway at ena with 10KT cross wind. Ground looped on roll out. Damaged outer 3 ft. of left wing tip and left aileron damage with possible… ## Docket (1 files) The files NTSB released with the investigation on June 30, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=79153. 132 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 132 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40350452&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.