# NTSB ANC10CA039: Piper PA-18-150, N90918, Cape Yakataga, AK, May 6, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 6, 2010, 12:00 local (20:00 UTC) - Place: Cape Yakataga, AK - Coordinates: 60.789634, -145.610183 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=60.7896&lon=-145.6102&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Miscellaneous/other](https://openairdocs.org/ntsb-events/900) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report August 12, 2010 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration (Airworthiness) - NTSB case key (mKey): 76039 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC10CA039 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76039/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76039 - Page: https://openairdocs.org/ntsb/ANC10CA039 ## Probable cause The uncertificated pilot's selection of an unsuitable landing site, resulting in a main landing gear collapse during the landing roll. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Piper PA-18-150, 51 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=7101828), [All aircraft, 3,100 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Experience/qualifications: qualification/certification](https://openairdocs.org/ntsb-findings/02031010): Personnel issues › Experience/knowledge · Pilot; cases with it: [Piper PA-18-150, 2 cases](https://openairdocs.org/ntsb-findings/02031010/cases.md?model=7101828), [All aircraft, 280 cases](https://openairdocs.org/ntsb-findings/02031010/cases.md) - [Landing gear system: main landing gear](https://openairdocs.org/ntsb-findings/01023210): Aircraft › Aircraft systems · Damaged/degraded; cases with it: [Piper PA-18-150, 2 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md?model=7101828), [All aircraft, 241 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md) - [Object/animal/substance](https://openairdocs.org/ntsb-findings/03022000): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Piper PA-18-150, 3 cases](https://openairdocs.org/ntsb-findings/03022000/cases.md?model=7101828), [All aircraft, 224 cases](https://openairdocs.org/ntsb-findings/03022000/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: Miscellaneous/other](https://openairdocs.org/ntsb-events/900) (defining event); cases with it: [Piper PA-18-150, 10 cases](https://openairdocs.org/ntsb-events/900/sequence.md?model=7101828), [All aircraft, 1,557 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Piper PA-18-150, 16 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=7101828), [All aircraft, 1,789 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The uncertificated pilot was landing a tailwheel-equipped airplane, with one passenger at a remote, rough and uneven off-airport site, at the completion of a Title 14, CFR Part 91, business flight. Witnesses noted that during the landing roll the airplane's right main wheel struck a log, and the right main landing gear collapsed. The right wing and right horizontal stabilizer struck the ground. The airplane sustained substantial damage to the right wing, right wing lift struts, empennage, and fuselage. Due to the remote location the airplane has not been examined by the NTSB. ## Factual narrative The uncertificated pilot was landing a tailwheel-equipped airplane with one passenger at a remote, rough, and uneven off-airport site at the completion of a Title 14, Code of Federal Regulations Part 91, business flight. Witnesses noted that during the landing roll the airplane's right main wheel struck a log and the right main landing gear collapsed. The right wing and right horizontal stabilizer struck the ground. The airplane sustained substantial damage to the right wing, right wing lift struts, empennage, and fuselage. The pilot did not submit the required 6120.1 Pilot/Operator Aircraft Accident/Incident Report. ## Aircraft - Registration: [N90918](https://openairdocs.org/deregistered/N90918-2021-12-04), registration cancelled 2021-12-04, S/N 18-8109044, built 1981 (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: 18-8109044 - Engines: LYCOMING O-320 SERIES 180 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Operator: Michael A. Roberts - Registered owner: Richard O. Bennett - Airworthiness certificate: Standard, Normal - Departed: Cape Yakataga, AK - Destination: Cape Yakataga, AK - Flight plan: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 48; injuries: none; flight hours: 1 total, 1 in this make and model ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles ## Other investigations on N90918 (1) 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 ANC89LA062](https://openairdocs.org/ntsb/ANC89LA062), Apr 22, 1989: Piper PA-18 (N90918), Anchorage, AK, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE LANDING ROLL. ## Docket (1 files) The files NTSB released with the investigation on July 7, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76039. 32 KB in all. - No Supporting Documentation (item 1, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40332586&FileExtension=.PDF&FileName=No%20Supporting%20Documentation-Master.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.