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Clutha tragedy: Investigators say key factors for crash 'unknown' Clutha tragedy: Investigators say key factors for crash 'unknown'
(35 minutes later)
Air accident investigators said it is "unknown" why a helicopter with enough fuel crashed into the Clutha bar in Glasgow killing 10 people. Air accident investigators have said it remains "unknown" why a helicopter with enough fuel crashed into the Clutha bar in Glasgow, killing 10 people.
Their report cites "unknown reasons" why fuel transfer pumps on the aircraft were switched off and why the pilot did not achieve a controlled landing. Their report says fuel transfer pumps on the aircraft were switched off, and the pilot did not achieve a controlled landing, for "unknown reasons".
The Police Scotland helicopter came down onto the busy pub at 22:25 BST on 29 November 2013. It also recommends that all police helicopters be equipped with black box flight recording equipment.
A fatal accident inquiry will now be held into the crash. A fatal accident inquiry will now be held into the 29 November 2013 crash.
First Minister Nicola Sturgeon said it was "deeply disappointing that after two years of investigation the report does not reach a clearer conclusion".
A Crown Office spokesman said: "The report raises a number of questions for which the families of the victims deserve answers.
"The Crown will now conduct further investigations into some of the complex issues raised by the AAIB report.
"We will endeavour to do this as quickly as possible but these matters are challenging and the necessary expertise is restricted to a small number of specialists."
The spokesman added: "As this tragedy involves deaths in the course of employment a fatal accident inquiry is mandatory. This will be held as soon as is possible."
Ms Sturgeon said that in some respects, the report "seems to raise more questions than it answers".
She added: "I therefore share the disappointment of the families that it does not provide the closure they sought and hope that the FAI that the Crown Office has now said will happen as soon as possible, can help the families get the answers they seek."
The helicopter crew who were killed were pilot David Traill, PC Tony Collins and PC Kirsty Nelis.The helicopter crew who were killed were pilot David Traill, PC Tony Collins and PC Kirsty Nelis.
The seven customers in the Clutha who died were John McGarrigle, Mark O'Prey, Gary Arthur, Colin Gibson, Robert Jenkins, Samuel McGhee and Joe Cusker.The seven customers in the Clutha who died were John McGarrigle, Mark O'Prey, Gary Arthur, Colin Gibson, Robert Jenkins, Samuel McGhee and Joe Cusker.