# NTSB GAA17CA509: Robinson Helicopter R22, N7198J, Bremerton, WA, August 24, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 24, 2017, 13:35 local (20:35 UTC) - Place: Bremerton, WA - Coordinates: 47.490833, -122.764167 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.4908&lon=-122.7642&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Dynamic rollover](https://openairdocs.org/ntsb-events/231) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 27, 2017 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 95890 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA17CA509 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/95890/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=95890 - Page: https://openairdocs.org/ntsb/GAA17CA509 ## Probable cause The student pilot’s improper bank control during takeoff, which resulted in a dynamic rollover. ## 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 · Student/instructed pilot (probable cause); cases with it: [Robinson Helicopter R22 BETA, 96 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=7640110), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: lateral/bank control](https://openairdocs.org/ntsb-findings/01062023): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Robinson Helicopter R22 BETA, 14 cases](https://openairdocs.org/ntsb-findings/01062023/cases.md?model=7640110), [All aircraft, 390 cases](https://openairdocs.org/ntsb-findings/01062023/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Dynamic rollover](https://openairdocs.org/ntsb-events/231) (defining event); cases with it: [Robinson Helicopter R22 BETA, 35 cases](https://openairdocs.org/ntsb-events/231/sequence.md?model=7640110), [All aircraft, 161 cases](https://openairdocs.org/ntsb-events/231/sequence.md) - [Takeoff: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Robinson Helicopter R22 BETA, 85 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=7640110), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The flight instructor reported that, after the student pilot performed several practice approaches, they landed the helicopter, and the flight instructor exited. The instructor reported that, after the start, the student pilot attempted to take off; the left skid lifted off the ground, but the right skid did not. Subsequently, the helicopter rolled to the right and came to rest on its right side. The helicopter sustained substantial damage to the main rotor system. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. ## Factual narrative The flight instructor reported that, after the student pilot performed several practice approaches, they landed the helicopter and the flight instructor exited. The instructor reported that after the start, the student pilot attempted to takeoff; the left skid lifted off the ground, but the right skid did not. Subsequently, the helicopter rolled to the right and came to rest on its right side. The helicopter sustained substantial damage to the main rotor system. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. ## Aircraft - Registration: [N7198J](https://openairdocs.org/aircraft/N7198J), registered now, S/N 3232, built 2001 (OpenAirDocs) - Reported make and model: ROBINSON HELICOPTER R22 - Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: 3232 - Year built: 2001 - Airframe hours: 7188.1 - Engines: LYCOMING O-360-J2A 145 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, July 27, 2017 - Departed: PWT, Bremerton, WA - Destination: PWT, Bremerton, WA - Airport: PWT, Bremerton National, runway 20, 6,000 × 150 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Student pilot; age 48; injuries: none; student; medical: class 2, without waivers/limitations; seat: right; restraint: 3-point; flight hours: 87.3 total, 86 in this make and model, 26.7 in the last 90 days, 12.3 in the last 30 days, 1.3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 3,500 ft broken - Temperature: 64 °F, dew point 52 °F - Altimeter: 30.11 inHg - Observed at: KPWT ## 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 20170824010449A](https://openairdocs.org/incident/20170824010449A), Aug 24, 2017: Robinson Helicopter R22 BETA, Bremerton, WA, Substantial damage. Instructor and student departed from bfi to pwt. At pwt they conducted a couple of practice landings. When the instructor decided to let the student attempt… ## Docket (2 files) The files NTSB released with the investigation on October 25, 2017, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=95890. 1.0 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 792 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40457295&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (item 2, .PDF, 252 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40457296&FileExtension=.PDF&FileName=Accident%20Photo-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.