# NTSB ANC20CA081: Performer High Performer, N2907, Chandalar Shelf, AK, August 12, 2020

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Data collection · Final report
- Date: August 11, 2020, 21:00 local (Aug 12, 2020, 05:00 UTC)
- Place: Chandalar Shelf, AK
- Coordinates: 68.140274, -147.944168 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=68.1403&lon=-147.9442&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: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Alaska Regional Office
- Parties: FAA
- NTSB case key (mKey): 101826
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC20CA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/101826/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=101826
- Page: https://openairdocs.org/ntsb/ANC20CA081

## Probable cause

The pilot's selection of unsuitable terrain for landing, which resulted in a loss of control during the landing and a nose over.

## 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: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=05635OK), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05635OK), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=05635OK), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md)
- [Terrain: rough terrain](https://openairdocs.org/ntsb-findings/03021015): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-findings/03021015/cases.md?model=05635OK), [All aircraft, 442 cases](https://openairdocs.org/ntsb-findings/03021015/cases.md)
- [Object/animal/substance: tree(s)](https://openairdocs.org/ntsb-findings/03022020): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-findings/03022020/cases.md?model=05635OK), [All aircraft, 933 cases](https://openairdocs.org/ntsb-findings/03022020/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); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-events/900/sequence.md?model=05635OK), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md)
- [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Joseph E Cizek HIGH PERFORMER, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=05635OK), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md)

## Analysis

The pilot reported that during the landing roll out, on a remote off-airport ridgeline with vegetation about two ft in height, he attempted a turn to the left while braking. While traveling "less than 10 mph", the right wheel struck vegetation, the pilot lost control, and the airplane nosed over. The airplane subsequently came to rest inverted and sustained substantial damage to the rudder. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

## Factual narrative

The pilot reported that during the landing roll out, on a remote off-airport ridgeline with vegetation about two ft in height, he attempted a turn to the left while braking. While traveling "less than 10 mph", the right wheel struck vegetation, the pilot lost control, and the airplane nosed over. The airplane subsequently came to rest inverted and sustained substantial damage to the rudder. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N2907](https://openairdocs.org/aircraft/N2907), registered now, S/N 2016, built 2017 (OpenAirDocs)
- Reported make and model: PERFORMER HIGH PERFORMER
- Registry model: [Joseph E Cizek HIGH PERFORMER](https://openairdocs.org/model/joseph-e-cizek-high-performer) (registry code 05635OK) (OpenAirDocs)
- Registry engine: [Lycoming O-320-A2B](https://openairdocs.org/engine/lycoming-o-320-a2b) (registry code 42101, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2016
- Year built: 2017
- Airframe hours: 118
- Engines: Lycoming O-320-A2B 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Condition, June 16, 2020
- Destination: Chandalar Shelf, AK
- Equipment: None

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; injuries: none; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, without waivers/limitations; last flight review June 2, 2019; seat: front; restraint: 3-point; flight hours: 520 total, 460 in this make and model, 420 as pilot in command, 40 in the last 90 days, 20 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 50° at 4 knots
- Visibility: 10 statute miles
- Lowest ceiling: 4,300 ft overcast
- Temperature: 54 °F, dew point 45 °F
- Altimeter: 29.87 inHg
- Observed at: PARC, 53 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 20200811015379A](https://openairdocs.org/incident/20200811015379A), Aug 11, 2020: Joseph E Cizek HIGH PERFORMER, Chandalar Lake, AK, Substantial damage. Prior to take off, the operator was repositioning the aircraft and making a braking turn to the left. Operator stated that the ground speed was approximately…

## Docket (2 files)

The files NTSB released with the investigation on September 8, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=101826. 2.0 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 1.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10099992&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf
- Accident picture (item 2, PDF, 1 page, 155 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10100080&FileExtension=pdf&FileName=Accident%20Picture-Rel.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.

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