# NTSB CEN11CA644: Cessna 120, N89954, Camden, AR, September 12, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 12, 2011, 10:30 local (15:30 UTC) - Place: Camden, AR - Coordinates: 33.622776, -92.763336 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.6228&lon=-92.7633&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Defining event: [Taxi: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report November 3, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 81798 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11CA644 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81798/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81798 - Page: https://openairdocs.org/ntsb/CEN11CA644 ## Probable cause The flight instructor's inadvertent braking during taxi. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Cessna 120, 3 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=2071402), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Taxi: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 120, 19 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071402), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Taxi: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 120, 13 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2071402), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis While taxiing the tailwheel-equipped airplane after landing, the flight instructor was demonstrating to the student some taxi techniques. During the demonstration, the flight instructor inadvertently applied the brakes, causing the airplane to nose over. Postaccident examination of the airplane indicated that the vertical stabilizer and rudder were crushed. The flight instructor reported no mechanical anomalies with the airplane prior to the accident. ## Factual narrative While taxiing the tail-wheel equipped airplane after landing, the flight instructor was demonstrating to the student some taxi techniques. During the demonstration, the flight instructor inadvertently applied the brakes, and the airplane nosed over. Postaccident examination of the airplane showed the vertical stabilizer and rudder were crushed. The flight instructor reported no mechanical anomalies with the airplane prior to the accident. ## Aircraft - Registration: [N89954](https://openairdocs.org/aircraft/N89954), registered now, S/N 9006, built 1946 (OpenAirDocs) - Reported make and model: CESSNA 120 - Registry model: [Cessna 120](https://openairdocs.org/model/cessna-120) (registry code 2071402) (OpenAirDocs) - Registry engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 9006 - Airframe hours: 5750 - Engines: CONT MOTOR C-85-12F 85 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Fly-A-Way LLC - Registered owner: Fly-A-Way LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 12, 2011 - Departed: CDH, Camden, AR - Destination: CDH, Camden, AR - Airport: CDH, Harrell Field Airport ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 40; injuries: none; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review July 27, 2011; seat: right; flight hours: 903 total, 25 in this make and model, 592 as pilot in command, 103 in the last 90 days, 84 in the last 30 days, 3 in the last 24 hours - Student pilot; age 25; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; seat: left; flight hours: 200 total, 2 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: calm ## 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 20110912020159A](https://openairdocs.org/incident/20110912020159A), Sep 12, 2011: Cessna 120, Camden, AR, Substantial damage. On September 12, 2011, at 1100 CDT, Cessna CE-120, N89954, flipped over on its back during an instructional flight while the instructor was demonstrating "high… ## Docket (1 files) The files NTSB released with the investigation on September 29, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81798. 303 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 303 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40354500&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.