# NTSB CEN12CA206: Hall Jeffrey Hall RV-4, N605RV, Calhan, CO, March 24, 2012 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Data collection · Final report - Date: March 24, 2012, 13:30 local (19:30 UTC) - Place: Calhan, CO - Coordinates: 39.048053, -104.293052 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.0481&lon=-104.2931&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report May 21, 2012 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA FSDO - NTSB case key (mKey): 83225 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN12CA206 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83225/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83225 - Page: https://openairdocs.org/ntsb/CEN12CA206 ## Probable cause The pilot's loss of airplane control while landing with a gusting tailwind condition. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Contributed to outcome (probable cause); cases with it: [Hall Jeffrey HALL RV-4, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=05612AQ), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Hall Jeffrey HALL RV-4, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05612AQ), [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: [Hall Jeffrey HALL RV-4, 1 case](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=05612AQ), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/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: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Hall Jeffrey HALL RV-4, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05612AQ), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Hall Jeffrey HALL RV-4, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=05612AQ), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot reported that he departed a private airfield earlier in the day, and, at the time he departed, the wind was from the north about 5 knots. About 3.5 hours later, he returned to the airfield, which has a north-south oriented runway. The pilot stated that, due to terrain obstructions, landing to the north was “unadvisable.” The pilot added that the wind socks at the airfield indicated a slightly northern wind, light and variable, with no gusts. The pilot stated that he flew three passes to assess the wind, then made his approach and landed to the south. He added that, throughout the landing roll, the airplane was not affected by the wind; however, when the airplane was traveling about 5 knots ground speed, a crosswind gust blew the airplane off track, lifted the tail, and the airplane flipped over onto its back. The airplane sustained substantial damage to its vertical stabilizer and canopy. The pilot reported that there were no airplane malfunctions that contributed to the cause of the accident. About an hour before the accident, the automated weather reporting station located about 14 miles west of the airfield reported wind from 040 degrees at 15 knots gusting to 19 knots. About 5 minutes after the accident, the automated weather reporting station located about 19 miles southwest of the airfield reported wind from 050 degrees at 11 knots gusting to 17 knots. ## Factual narrative The airline transport pilot reported that he departed a private airfield earlier in the day and at the time he departed, the wind was from the north about 5 knots. About three and half hours later, he returned to the airfield, which has a north-south oriented runway. The pilot stated that due to terrain obstructions, landing to the north was “unadvisable”. The pilot added that the wind socks at the airfield indicated a slightly northern wind, light and variable, with no gusts. The pilot then stated that he flew three passes to assess the wind, then made his approach and landed to the south. He added that throughout the landing roll the airplane was not affected by the wind; however, when the airplane was at about 5 knots ground speed, a crosswind gust blew the airplane off track, lifted the tail, and the airplane flipped over onto its back. The airplane received substantial damage to its vertical stabilizer and canopy. The pilot also added that there were no airplane malfunctions that contributed to the cause of the accident. At 1226 automated weather reporting station located about 14 miles west of the accident airfield reported wind from 040 degrees at 15 knots gusting to 19. At 1335 the automated weather reporting station located about 19 miles southwest reported the wind from 050 degrees at 11 knots gusting to 17 knots. ## Aircraft - Registration: [N605RV](https://openairdocs.org/aircraft/N605RV), registered now, S/N 2179, built 2002 (OpenAirDocs) - Reported make and model: HALL JEFFREY HALL RV-4 - Registry model: [Hall Jeffrey HALL RV-4](https://openairdocs.org/model/hall-jeffrey-hall-rv-4) (registry code 05612AQ) (OpenAirDocs) - Registry engine: [Lycoming O-360 series](https://openairdocs.org/engine/lycoming-o-360-series) (registry code 41575, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 2179 - Engines: LYCOMING O-360 SERIES 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Staggerwing Aviation Inc - Registered owner: Staggerwing Aviation Inc - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, March 17, 2011 - Departed: KFTG, Watkins, CO - Destination: CD23, Calhan, CO - Airport: CD23, Aerobear Field, runway 18, 2,200 × 60 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 68; flight instructor, flight engineer, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review March 12, 2011; flight hours: 33,000 total, 27 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 40° at 15 knots, gusting 19 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 19 °F - Altimeter: 30.15 inHg - Observed at: KMNH, 14 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 20120324005099A](https://openairdocs.org/incident/20120324005099A), Mar 24, 2012: Hall Jeffrey HALL RV-4, Calhan, CO, Substantial damage. Aircraft N605RV piloted by sole occupant [privacy data omitted], completed a successful landing to the south at CD23 Aero Bear Field in Calhan co with a… ## Docket (2 files) The files NTSB released with the investigation on April 30, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83225. 756 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 599 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40366667&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Weather Reports and Records (item 2, .PDF, 156 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40366668&FileExtension=.PDF&FileName=Weather%20Reports%20and%20Records-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.