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2015/02

Report on serious incident near Gullfaks B at Tampen HTZ 1. April 2010 with Sikorsky S-92A, LN-OQE operated by CHC Helikopter Service AS

As the commander moved his seat forward in preparation for the final approach to Gullfaks B, it became detached from the seat rails. He had to hold on to the overhead hand grips with both hands to prevent the seat from falling down from the seat rails with the subsequent risk of jamming the flight controls (collective and cyclic stics). The first officer landed the helicopter on the oil rig without further incident. It was discovered that the seat had detached from the rails because the forward slide stops were missing. The quick release pins and the slide stops (P/N MBCS13711) had not been replaced when the seat was reinstalled, having been removed in connection with maintenance work on the helicopter. In the opinon of SHT, the crew resolved the hazardous situation that occurred in a good manner.

This report is in Norwegian only. No safety recommendation is issued in connection with this investigation.

Facts

Location Gullfaks B, Tampen HZT
Occurrence date 01.04.2010
ICAO Location indicator ENQG
Aircraft Sikorsky øvrige
Operator CHC Helikopter Service
Registration LN-OQE
Meteorological conditions VMC
County Annet/offshore
Type of occurrence Serious incident
Type of operation Offshore
Category of operation Heavy, helicopter (> 2 250kg)
Aircraft category Helicopter, Multi-engine, Turboprop/turboshaft
FIR/AOR ENSV (Stavanger ATCC)

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