AAIB Report - G-WNSR
here.
In particular -
Initial findings indicate that the failure of this specific bearing was rapid; a period of 4.5 hours had elapsed from the first exceedance of
the relevant bearing condition indicator recorded on the operator’s Health and Usage Monitoring System (HUMS) to the point of failure.
A routine download of the HUMS was performed on the evening of 27 December 2016 and the helicopter was released to service.
A detailed analysis of the data, conducted after the accident, showed that the Tail Gearbox Bearing Energy Analysis limit had been exceeded on 27 December 2016.
Downloaded and released by not analysed until after the fact?
Courtesy of (NSFW)
Rig Workers Rant
Right, so the AAIB Report is out on the West Franklin S92 incident and what do we find?
The tail rotor bearing went out of its service parameters 4.5 hours before it failed ie. during the previous day's flying.
The HUMS data which showed this was downloaded the previous night but had not been analysed before the accident occurred.
What the **** is the point of having HUMS on the chopper if nobody is going to look at the data from it?
What the **** is the point of the operator, CHC, introducing a measure to ensure that the maximum time between HUMS download and analysis is 5 hours?
The chopper will have crashed 30 mins before the deadline expires. Why isn't this data being analysed in realtime? It's not like the technology isn't available!
Frequent flyers will also be interested in learning that 4 S-92s failed their checks. None of the Norwegian choppers failed, odd that!
Sounds like real time analysis is supposed to be the fix if you drink the Kool Aid on offer by SK at HAI.
Meanwhile .......................................
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