# NTSB CEN13CA532: Cessna 150G, N4791X, Denver, CO, September 6, 2013 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 6, 2013, 10:04 local (16:04 UTC) - Place: Denver, CO - Coordinates: 39.569999, -104.849166 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.5700&lon=-104.8492&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 19, 2013 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Denver FSDO - NTSB case key (mKey): 87994 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN13CA532 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/87994/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=87994 - Page: https://openairdocs.org/ntsb/CEN13CA532 ## Probable cause The pilot's failure to maintain directional control during landing which resulted in an impact with the runway surface. A contributing factor was the certified flight instructor delayed response to the pilot's improper landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 150G, 6 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2071816), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Action: lack of action](https://openairdocs.org/ntsb-findings/02041030): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna 150G, 4 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md?model=2071816), [All aircraft, 792 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md) - [Action: delayed action](https://openairdocs.org/ntsb-findings/02041025): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Cessna 150G, 1 case](https://openairdocs.org/ntsb-findings/02041025/cases.md?model=2071816), [All aircraft, 894 cases](https://openairdocs.org/ntsb-findings/02041025/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 150G, 8 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071816), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Cessna 150G, 13 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2071816), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) - [Landing: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 150G, 23 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2071816), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The private pilot was performing a three-point landing in the tail-wheel equipped airplane when shortly after touchdown the airplane began to drift to the right. The certified flight instructor reported that his efforts to correct the drift were unsuccessful and the nose of the airplane began to turn hard to the left as the right wing impacted the runway. There was substantial damage to the right wing and the right aileron. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. ## Factual narrative The private pilot was performing a three-point landing in the tail-wheel equipped airplane when shortly after touchdown the airplane began to drift to the right. The certified flight instructor reported that his efforts to correct the drift were unsuccessful and the nose of the airplane began to turn hard to the left as the right wing impacted the runway. There was substantial damage to the right wing and the right aileron. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. ## Aircraft - Registration: [N4791X](https://openairdocs.org/aircraft/N4791X), registered now, S/N 15064841, built 1966 (OpenAirDocs) - Reported make and model: CESSNA 150G - Registry model: [Cessna 150G](https://openairdocs.org/model/cessna-150g) (registry code 2071816) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15064841 - Airframe hours: 6389 - Engines: CONT MOTOR 0-200 SERIES 100 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal; Standard, Utility - Last inspection: Annual, August 5, 2013, 17 hours before - Departed: APA, Denver, CO - Destination: APA, Denver, CO - Flight plan: Unknown - Airport: APA, Centennial Airport, runway 17R, 7,000 × 77 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 33; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review September 6, 2013; seat: left; restraint: 3-point; flight hours: 225 total, 219 in this make and model, 4 in the last 90 days, 4 in the last 30 days, 4 in the last 24 hours - Flight instructor; age 70; injuries: none; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review December 4, 2012; seat: right; restraint: 3-point; flight hours: 21,425 total, 18 in this make and model, 159 in the last 90 days, 107 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Observed at: KAPA ## 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 20130906024689A](https://openairdocs.org/incident/20130906024689A), Sep 6, 2013: Cessna 150G, Denver, CO, Substantial damage. On 09/06/2013 at approximately 1004 hours MDT, N4791X a Cessna 150G ground looped after landing at Centennial Airport (apa). The aircraft received substatial… ## Docket (2 files) The files NTSB released with the investigation on December 13, 2013, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=87994. 6.4 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (CFI's Report) (item 1, .PDF, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40404890&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20%20(CFI%27s%20Report)-Redacted.PDF - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (Pilot's Report) (item 2, .PDF, 2.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40404892&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20%20(Pilot%27s%20Report)-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.