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ASN Wikibase Occurrence # 197098
Last updated: 12 June 2019
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Date:02-AUG-2017
Time:07:20 LT
Type:Sikorsky S-97 Raider
Owner/operator:Sikorsky
Registration: N971SK
C/n / msn: 97-0001
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:William P Gwinn Airport, Palm Beach County, FL -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Test
Departure airport:William P Gwinn Airport (06FA)
Destination airport:William P Gwinn Airport (06FA)
Narrative:
The experimental Sikorsky S-97 experienced a hard landing while hovering at the Sikorsky Development Flight Center at William P Gwinn Airport (06FA), Jupiter, Florida. Both pilots received minor injuries. The test flight was conducted under the provisions of 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed and no flight plan was filed for the local flight. The aircraft sustained substantial damage.

According to the pilot-in-command, he was in the right seat and manipulating the controls at the time of the accident. He stated that he applied collective to get the helicopter light on the wheels and then applied forward cyclic to initiate a roll forward. He ground taxied to the runway just as he had done on other flights. He intended to hold short of the runway and wait to be notified that the SAR (search and rescue) aircraft was on station. As the helicopter approached the runway, a slight left roll developed. The pilot decided to lift the helicopter into a 5 ft hover and stabilize. As he applied collective and got airborne the helicopter rolled quickly left and then right, continuing with 2-3 roll reversals of increasing roll attitudes eventually exceeding an estimated 60° angle of bank. The pilot applied counter roll control inputs, but roll rates experienced were excessive. After 2-3 roll reversals and after a large right angle of bank roll, as the helicopter reversed its roll, the pilot lowered the collective to full down to execute a landing. After the landing, he shut the engine down, and completed the emergency shutdown procedure. He and the copilot exited the helicopter normally. An examination of the helicopter revealed a collapsed landing gear, structural cabin damage and rotor blade tip separation of all 8 rotor blades.

Sources:

https://www.wptv.com/news/region-c-palm-beach-county/west-palm-beach/s-97-raider-helicopter-makes-a-hard-landing-at-the-sikorsky-development-flight-center
https://www.defensenews.com/land/2017/09/11/s-97-raider-sustained-substantial-damage-in-crash-but-program-moves-forward/
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N971SK
https://www.verticalmag.com/news/sikorsky-reveals-details-s-97-raider-hard-landing-ntsb-publishes-initial-report/
https://www.verticalmag.com/news/ntsb-releases-more-details-s-97-raider-accident/
https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20170802X24925&key=1


Revision history:

Date/timeContributorUpdates
02-Aug-2017 21:58 Iceman 29 Added
02-Aug-2017 22:26 Aerossurance Updated [Aircraft type, Location, Embed code]
03-Aug-2017 05:28 Aerossurance Updated [Time]
03-Aug-2017 10:47 Iceman 29 Updated [Registration, Source, Embed code]
11-Sep-2017 17:57 Aerossurance Updated [Time, Registration, Cn, Location, Phase, Departure airport, Destination airport, Source, Damage, Narrative]
11-Sep-2017 18:01 Aerossurance Updated [Location, Narrative]
11-Sep-2017 21:18 Aerossurance Updated [Source, Narrative]
01-May-2019 15:43 Aerossurance Updated [Source, Narrative]

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