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ASN Wikibase Occurrence # 174747
Last updated: 15 August 2018
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Date:21-MAR-2015
Time:10:20 LT
Type:Silhouette image of generic S76 model; specific model in this crash may look slightly different
Sikorsky S-76C+
Owner/operator:PT Hevilift Aviation Indonesia
Registration: PK-FUP
C/n / msn: 760582
Fatalities:Fatalities: 0 / Occupants: 7
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Kutai Lama, Anggana, East Kalimantan -   Indonesia
Phase: En route
Nature:Survey
Departure airport:Handil
Destination airport:Handil
Narrative:
The helicopter crashed in a mangrove swamp. The two pilots received serious injuries and five passengers received minor injuries. The fuselage came to rest inverted.

Contracted by Total E&P Indonesie (TEPI) on a mission to inspect pipelines in the GTS-4 (CPU / Central Processing Unit) Anggana area, operating at 500ft.

The investigation of another Sikorsky accident on 12 August 2015 in Nigeria (5N-BGD) found similar symptom of the pitch and roll un-commanded attitude.

The investigators found that loosening of the jam nut of the forward main rotor servo push rod was undetected during the daily operation and led to the rod end bearing was not engage properly against the push rod. The condition of rod end bearing did not properly engage against the push rod resulted in the asymmetric deformation of the internal thread in the push rod during the operation. Continuous operation with such a condition led to deterioration of the engagement of the forward push rod and the rod end bearing which subsequently the rod end bearing separated from the push rod. This resulted in the un-commanded servo movement to the main rotor control that led the helicopter enter un-commanded attitude an uncontrollable main rotor and loss of control of the helicopter.

Sources:

http://en.republika.co.id/berita/en/national-politics/15/03/22/nllygk-helicopter-crashlands-in-kutai-kartanegara-passangers-safe
http://www.thejakartapost.com/news/2015/03/22/helicopter-survey-mission-prior-incident-says-total.html
http://www.beritahukum.com/detail_berita.php?judul=Helikopter+Angkut+Karyawan+PT+Total+Jatuh+di+Sungai+Kelambu+Kukar&subjudul=Kecelakaan+Helikopter+ (photo)
https://lh6.googleusercontent.com/oJXRi1hMoEWzdUp-dDYTp6HXsxhn7TBZzI4206pYlcCZ=w480-h270-no (photo)
http://abiesuhastrada.tumblr.com/post/114195695370/pk-fup-operated-by-heavilift-for-total-ep (photo)
https://www.hugedomains.com/domain_profile.cfm?d=kaltimnews&e=com
http://www.thejakartapost.com/news/2015/03/22/helicopter-crash-victims-leave-hospital.html
https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20150601X23534&key=1
https://www.atsb.gov.au/publications/investigation_reports/2015/aair/ae-2015-039.aspx
http://aerossurance.com/helicopters/s76c-pkfup-flying-control-fail/
http://knkt.dephub.go.id/knkt/ntsc_aviation/baru/pre/Preliminary%20Report%20PK-FUP.pdf
http://knkt.dephub.go.id/knkt/ntsc_aviation/baru/2015%20-%20008%20-%20PK-FUP%20FINAL%20Report.pdf


Revision history:

Date/timeContributorUpdates
22-Mar-2015 12:15 gerard57 Added
22-Mar-2015 12:16 harro Updated [Aircraft type]
22-Mar-2015 14:34 TB Updated [Time, Aircraft type, Cn, Location, Nature]
22-Mar-2015 16:26 Aerossurance Updated [Time, Nature, Source, Narrative]
22-Mar-2015 16:48 Aerossurance Updated [Source, Narrative]
22-Mar-2015 16:58 Aerossurance Updated [Location, Departure airport, Source, Narrative]
22-Mar-2015 17:19 Anon. Updated [Source, Narrative]
22-Mar-2015 20:07 Aerossurance Updated [Location, Departure airport, Source, Narrative]
24-Mar-2015 16:40 TB Updated [Location]
28-Jun-2015 16:56 Aerossurance Updated [Source, Narrative]
21-Dec-2015 13:14 Aerossurance Updated [Narrative]
19-Jul-2016 15:02 Aerossurance Updated [Source, Narrative]
19-Jul-2016 15:14 Aerossurance Updated [Embed code]
28-Aug-2016 17:31 Aerossurance Updated [Cn, Departure airport, Destination airport, Source, Embed code]
22-Sep-2016 15:50 Aerossurance Updated [Narrative]
27-Jun-2018 18:57 harro Updated [Narrative]
06-Aug-2018 12:38 Aerossurance Updated [Source, Narrative]
06-Aug-2018 13:14 Aerossurance Updated [Narrative]
07-Aug-2018 07:21 Aerossurance Updated [Source]

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