THE helicopter that crashed into the roof of the Clutha Vaults Bar had been called out to a false report of a body at a railway line in Oatlands.

Today was the second day of the Fatal Accident Inquiry (FAI) into events surrounding the crash in November 2013 that claimed 10 lives and left another 31 injured.

Being held in a temporary court in Hampden Park, the inquiry yesterday heard evidence from two members of the Air Accident Investigation Branch (AAIB).

Philip Sleight, Deputy Chief Inspector, was questioned by both Procurator Fiscal Depute Sean Smith and Donald Findlay QC, who is acting for the family of one of the victims, Robert Jenkins.

READ MORE: Eyewitnesses to fatal helicopter crash give evidence at Clutha FAI

Marcus Cook, senior inspector of air accidents at the Air Accidents Investigation Branch (AAIB), said that pilot David Traill would have had five low fuel warnings on the night in question.

As Mr Cook was questioned by Procurator Fiscal Depute Sean Smith QC, a chart of the helicopter's final journey, which was traced by radar, was shown to the court.

It left Glasgow at 8.45pm in response to reports that someone had been struck by a train at Oatlands, on Glasgow's South Side.

With crew Tony Collins and Kirsty Nelis on board, it then travelled to Dalkeith for a routine surveillance task before carrying out further surveillance in Bothwell, Uddingston and Bargeddie.

At 10.19pm, Mr Traill told air traffic control he was returning to Glasgow City Heliport but at 10.22pm the helicopter plunged into the roof of the Clutha.

Along with the crew on board, seven customers in the Clutha were killed: Gary Arthur, 48; Joe Cusker, 59; Colin Gibson, 33; Robert Jenkins, 61; John McGarrigle, 57; Samuel McGhee, 56; and Mark O'Prey, 44.

Mr Cook answered detailed questions about the amount of fuel on board the helicopter and how a pilot might ordinarily respond to fuel warning lights.

The expert told the court that a pilot would know from memory that the protocol was to land within 10 minutes.

READ MORE: Clutha FAI: Pilot received 'numerous' low-fuel warnings

A pilot would also be expected to make a PAN call - a signal that would have told air traffic control the aircraft had a problem and needed assistance to land "expeditiously".

Mr Cook also said a pilot who believes the aircraft is going below its final fuel reserve would then make a mayday call.

Police helicopter pilots have "acute fuel awareness," Mr Cook said. "It's ingrained in their training from day one."

He added: "Pilots always have in the back of their mind how much fuel they have, and if it's not enough, consider diverting."

Mr Cook also said the pilot would have had three rotor speed warnings, a light coming on and off. "This indicates there was some input [from the pilot] trying to manage [the situation]".

Mr Traill was an experienced pilot and had spent nearly 650 hours at the controls of an EC135 helicopter.

The inquiry also heard there are no plans to reopen the AAIB investigation into the crash.

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Mr Sleight told the Clutha FAI there had been new documents presented but none of them were considered new or significant enough.

More than 100 people were at the Clutha Vaults pub when the helicopter, returning to its base on the banks of the River Clyde, crashed through the roof.

An Air Accidents Investigations Branch (AAIB) report published in 2015 found two fuel supply switches were off and the pilot did not follow emergency procedures after a fuel warning in the cockpit.

The Crown Office has previously said there is insufficient evidence for criminal proceedings.

The inquiry is expected to involve around three months of evidence spread over six calendar months this year.