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ASN Wikibase Occurrence # 206283
Last updated: 15 February 2020
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Date:01-FEB-2018
Time:11:00 LT
Type:Silhouette image of generic S61 model; specific model in this crash may look slightly different
Sikorsky S-61N
Owner/operator:British International Helicopters
Registration: G-ATBJ
C/n / msn: 61-269
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Marchwood Military Port, Marchwood, Hampshire -   United Kingdom
Phase: Take off
Nature:Ferry/positioning
Departure airport:Marchwood Sea Mounting Centre, Hampshire
Destination airport:Bournemouth International Airport (BOH/EGHH)
Investigating agency: AAIB
Narrative:
The helicopter was being transferred from Marchwood, Hampshire, to a maintenance base having been transported, by sea, from the Falkland Islands. As the helicopter took off for a hover check it pitched nose-down. The commander promptly lowered the collective and the helicopter struck the ground on its nose, before coming to rest on its landing gear.

The investigation found that the spherical bearing within the swashplate had seized as a result of corrosion, compounded by inactivity during the voyage from the Falkland Islands. The checks prior to the flight did not identify the control restriction.

Safety action has been taken by the helicopter manufacturer to highlight the correct pre flight procedures to follow after prolonged aircraft inactivity, and by the operator to remind flight crews to conduct flight control servo system checks to the maximum extents of control movement.

Sources:

1. NTSB Identification: CEN18WA090 at https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20180205X92908&key=1
2. https://abpic.co.uk/pictures/view/1473834
3. https://www.gov.uk/government/publications/aaib-current-field-investigations/air-accidents-investigation-branch-current-field-investigations
4. https://www.pprune.org/rotorheads/605764-s61-g-atbj-damaged.html
5. AAIB Final Report: https://www.gov.uk/aaib-reports/aaib-investigation-to-sikorsky-s-61n-sea-king-g-atbj
6. http://aerossurance.com/helicopters/s61n-swashplate-seized/

Accident investigation:
cover
  
Investigating agency: AAIB
Status: Investigation completed
Duration: 2 years
Download report: Final report


Images:

Photo of G-ATBJ courtesy AirHistory.net


Glasgow - Prestwick (EGPK / PIK)
17 February 2006; (c) Ian Howat


Photo: AAIB

Revision history:

Date/timeContributorUpdates
17-Feb-2018 15:56 Geno Added
23-Feb-2018 08:45 Anon. Updated [Location]
23-Feb-2018 10:01 Anon. Updated [Date]
23-Feb-2018 11:58 Aerossurance Updated [Location, Departure airport, Narrative]
27-Mar-2018 09:20 Aerossurance Updated [Source, Damage, Narrative]
18-Oct-2018 17:27 Dr.John Smith Updated [Location, Nature, Departure airport, Source, Narrative]
01-Feb-2020 15:37 harro Updated [Time, Nature, Departure airport, Destination airport, Narrative, Photo, Accident report, ]
01-Feb-2020 21:21 Dr. John Smith Updated [Destination airport, Source, Embed code, Narrative]
03-Feb-2020 14:26 plcedi Updated [Source, Embed code, Damage, Narrative]
07-Feb-2020 21:59 Aerossurance Updated [Time, Location, Phase, Source, Narrative]

Corrections or additions? ... Edit this accident description