Originally Posted by Lonewolf_50
Am I correct in understanding that the emergency lubrication didn't begin to provide lube (i.e. provide lube to the gearbox when the normal lube failed due to the shaft no longer driving the pumps)
or
that the emergency system (as described by Colibri above) was actually providing the back up lube, but the warning sytem told the pilots a different story.
Your understanding is incorrect, the second comment is correct. The details are in the AAIB bulletin, I shall try and find it, Colibri49 is spot on as that is what I have read also.
That is the cause for the ditching, it is an entirely different discussion of whether if the Emlube didn't give a false indication whether the gearbox would have carried on regardless.
Si