# NTSB WPR15CA118: Christopher Jon Brown Stol CH750, N756AC, Palmdale, CA, March 3, 2015 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 3, 2015, 11:00 local (19:00 UTC) - Place: Palmdale, CA - Coordinates: 34.515277, -117.761947 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.5153&lon=-117.7619&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 8, 2015 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 90813 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR15CA118 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/90813/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=90813 - Page: https://openairdocs.org/ntsb/WPR15CA118 ## Probable cause The pilot's failure to maintain airplane control when he exceeded the airplane's critical angle of attack during climb out which resulted in a loss of airspeed and subsequent aerodynamic stall. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Christopher Jon Brown STOL CH750, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=056324W), [All aircraft, 9,308 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Christopher Jon Brown STOL CH750, 1 case](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=056324W), [All aircraft, 991 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) - [Performance/control parameters: airspeed](https://openairdocs.org/ntsb-findings/01062010): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Christopher Jon Brown STOL CH750, 1 case](https://openairdocs.org/ntsb-findings/01062010/cases.md?model=056324W), [All aircraft, 1,682 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) (defining event); cases with it: [Christopher Jon Brown STOL CH750, 1 case](https://openairdocs.org/ntsb-events/241/sequence.md?model=056324W), [All aircraft, 1,530 cases](https://openairdocs.org/ntsb-events/241/sequence.md) ## Analysis The pilot reported that during initial climb out, just after becoming airborne, he inputted a higher than normal angle of attack and subsequently the airplane stalled and rolled to the left. The pilot was unable to recover and the airplane struck vegetation and impacted the ground. Substantial damage was sustained to the wings and fuselage during the accident sequence. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative The pilot reported that during initial climb out, just after becoming airborne, he inputted a higher than normal angle of attack and subsequently the airplane stalled and rolled to the left. The pilot was unable to recover and the airplane struck vegetation and impacted the ground. Substantial damage was sustained to the wings and fuselage during the accident sequence. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N756AC](https://openairdocs.org/aircraft/N756AC), registered now, S/N 75-8063, built 2014 (OpenAirDocs) - Reported make and model: CHRISTOPHER JON BROWN STOL CH750 (NO SERIES) - Registry model: [Christopher Jon Brown STOL CH750](https://openairdocs.org/model/christopher-jon-brown-stol-ch750) (registry code 056324W) (OpenAirDocs) - Registry engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 75-8063 - Year built: 2014 - Airframe hours: 113.6 - Engines: ROTAX 912ULS 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: 100 hour, December 4, 2014, 14 hours before - Departed: CL13, PALMDALE, CA - Destination: L70, AGUA DULCE, CA - Airport: CL13, Brian Ranch Aiport, runway 26, 2,100 × 50 ft, dirt - Equipment: Electronic multifunction display, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; injuries: none; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review April 30, 2014; seat: left; restraint: 3-point; flight hours: 2,928 total, 115 in this make and model, 2,835 as pilot in command, 37.5 in the last 90 days, 19.6 in the last 30 days, 0.1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 34 °F - Altimeter: 29.96 inHg - Observed at: PMD, 18 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 20150303005299A](https://openairdocs.org/incident/20150303005299A), Mar 3, 2015: Christopher Jon Brown STOL CH750, Llano, CA, Substantial damage. Installed tail skid to enhance short field takeoff performance. Rotated early/excessively. Airplane failed to climb and struck the ground left wing tip first… ## Docket (1 files) The files NTSB released with the investigation on June 8, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=90813. 4.4 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 4.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40427488&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.