# NTSB ANC11CA111: Cessna 180H, N9083M, Chenga Bay, AK, September 27, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 27, 2011, 10:30 local (18:30 UTC) - Place: Chenga Bay, AK - Coordinates: 59.870277, -147.78778 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=59.8703&lon=-147.7878&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 January 18, 2012 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 81914 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC11CA111 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81914/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81914 - Page: https://openairdocs.org/ntsb/ANC11CA111 ## Probable cause The pilot's failure to maintain clearance from an obstruction while landing at an off-airport site, resulting in a loss of control. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance](https://openairdocs.org/ntsb-findings/03022000): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Cessna 180H, 4 cases](https://openairdocs.org/ntsb-findings/03022000/cases.md?model=2072618), [All aircraft, 224 cases](https://openairdocs.org/ntsb-findings/03022000/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna 180H, 5 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2072618), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 180H, 1 case](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=2072618), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/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: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 180H, 16 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2072618), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 180H, 31 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072618), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot reported that he was landing his tailwheel-equipped airplane at an off-airport site. During the landing, the right wing contacted brush adjacent to the landing area, and the airplane ground-looped. The airplane sustained substantial damage to both wings, the left horizontal stabilizer, and the fuselage. The pilot indicated there were no preaccident mechanical anomalies with the airplane. He stated that the accident could have been prevented had he landed farther down the landing area to avoid any brush. ## Factual narrative The pilot reported that he was landing his tailwheel-equipped airplane at an off-airport landing site. During the landing, the right wing contacted brush adjacent to the landing area, and the airplane ground looped. The airplane received substantial damage to both wings, the left horizontal stabilizer, and the fuselage. The pilot indicated there were no preaccident mechanical anomalies with the airplane. He stated that the accident could have been prevented had he landed farther down the landing area to avoid any brush. ## Aircraft - Registration: [N9083M](https://openairdocs.org/deregistered/N9083M-2017-05-22), registration cancelled 2017-05-22, S/N 18052183, built 1971 (OpenAirDocs) - Reported make and model: CESSNA 180H - Registry model: [Cessna 180H](https://openairdocs.org/model/cessna-180h) (registry code 2072618) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18052183 - Airframe hours: 4816 - Engines: CONT MOTOR O-470 SERIES 230 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 7, 2011 - Departed: 4AK6, Palmer, AK - Destination: Montague Island, AK - Flight plan: VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review August 23, 2011; seat: left; flight hours: 1,149 total, 47 in this make and model, 47 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 20 statute miles - Lowest ceiling: none - Temperature: 39 °F ## 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 20110927029319A](https://openairdocs.org/incident/20110927029319A), Sep 27, 2011: Cessna 180H, Chenga, AK, Substantial damage. While landing on a strip on montague island the aircrafts right wintip touched some alder branches which pulled the aircraft in a manner that caused a ground… ## Other investigations on N9083M (2) 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. - [NTSB ANC14LA054](https://openairdocs.org/ntsb/ANC14LA054), Jul 14, 2014: Cessna 180H (N9083M), Seward, AK, substantial damage. Probable cause: The pilot’s execution of a hard uncoordinated landing, which resulted in the overstress fracture of the right main landing gear (MLG) axle attachment bolts and the subsequent separation of the of the… - [NTSB DEN79DTC20](https://openairdocs.org/ntsb/DEN79DTC20), Jul 11, 1979: Cessna 180 (N9083M), Cody, WY, substantial damage ## Docket (1 files) The files NTSB released with the investigation on December 1, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81914. 1.3 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40359091&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.