# NTSB ANC11TA109: Cub Crafters CC18-180, N907CF, Palmer, AK, September 26, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Final report - Date: September 26, 2011, 14:15 local (22:15 UTC) - Place: Palmer, AK - Coordinates: 61.501945, -148.911392 - Nearby events: https://openairdocs.org/map.md?lat=61.5019&lon=-148.9114&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report May 21, 2012 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: FAA FSDO-03 - NTSB case key (mKey): 81899 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC11TA109 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81899/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81899 - Page: https://openairdocs.org/ntsb/ANC11TA109 ## Probable cause The pilot's excessive application of the brakes during landing, which resulted in a nose-over. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Cub Crafters CC18-180, 2 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=2470003), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cub Crafters CC18-180, 8 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2470003), [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: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Cub Crafters CC18-180, 6 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2470003), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The flight instructor and the pilot-receiving-instruction were on a public aircraft training flight. The pilot on the controls said that they had made numerous landings at several locations during the day. During the accident landing, he said he applied what he felt was appropriate braking pressure, but the airplane abruptly nosed over and sustained substantial damage. During an examination of the airplane at the accident site by the operator's mechanics, the main wheels rotated freely, and the brakes operated normally. ## Factual narrative On September 26, 2011, about 1415 Alaska Daylight time, a Cub Crafters CC-18-180 airplane, N907CF, sustained substantial damage when it nosed over during landing at an off airport site, about 7 miles east of Palmer, Alaska. The airplane was operated by the Alaska Department of Public Safety, Anchorage, Alaska, as a visual flight rules (VFR) public aircraft training flight when the accident occurred. The certificated flight instructor, and the commercial pilot on the controls, were not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. In a written statement to the National Transportation Safety Board dated September 28, the pilot on controls said they had made numerous landings at several locations during the day. During the accident landing he said he applied what he felt was appropriate braking pressure, but the airplane abruptly nosed over. The pilot reported that the airplane received substantial damage to the vertical stabilizer, rudder, and wings. The operator's mechanics traveled to the remote location to recover the airplane. Based on statements made by the pilot, the mechanics examined the airplane's landing gear and brakes at the accident site. According to the director of maintenance for the operator, the mechanics found the main wheels rotated freely, and that after righting the airplane the brakes operated normally. The airplane was not examined by the NTSB investigator-in-charge. ## Aircraft - Registration: [N907CF](https://openairdocs.org/aircraft/N907CF), registered now, S/N CC18-0045, built 2010 (OpenAirDocs) - Reported make and model: CUB CRAFTERS INC CC18-180 - Registry model: [Cub Crafters CC18-180](https://openairdocs.org/model/cub-crafters-cc18-180) (registry code 2470003) (OpenAirDocs) - Registry engine: [Lycoming O-360-C4P](https://openairdocs.org/engine/lycoming-o-360-c4p) (registry code 42289, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: CC18-0045 - Airframe hours: 165 - Engines: LYCOMING O-360-C4P 180 horsepower reciprocating - Damage: Substantial damage - Flight: Public aircraft - state, Public use - Operator: Alaska Department Of Public Safety - Registered owner: Alaska Department Of Public Safety - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, May 26, 2011 - Departed: Z41, Anchorage, AK - Destination: Palmer, AK - Flight plan: Company VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; injuries: none; airline transport, commercial, flight instructor; airplane ratings: multi-engine sea, single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review October 1, 2009; seat: rear; flight hours: 7,885 total, 65 in this make and model, 7,535 as pilot in command, 81 in the last 90 days, 33 in the last 30 days, 3 in the last 24 hours - Pilot; age 32; injuries: none; commercial; airplane ratings: single-engine land, single-engine sea; medical: class 2, with waivers/limitations; last flight review May 28, 2010; seat: front; flight hours: 420 total, 3 in this make and model, 323 as pilot in command, 28 in the last 90 days, 15 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 52 °F - Observed at: PAAQ, 7 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 20110926026119A](https://openairdocs.org/incident/20110926026119A), Sep 26, 2011: Cub Crafters Inc CC18-180, Anchorage, AK, Minor damage. The airman will not be available for interview until the week of 24 oct, 2011.11/8/2011 N907CF was being piloted by a student in the front seat and a flight… ## Docket (2 files) The files NTSB released with the investigation on April 26, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81899. 6.3 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (Frey) (item 1, .PDF, 3.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40366939&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20(Frey)-Redacted.PDF - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (Duell) (item 2, .PDF, 3.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40366940&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20(Duell)-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.