The last flying Vulcan bomber is unlikely to make an appearance at the Waddington International Air Show after a double engine fault.
The aircraft was about to take off to practise its routine for the show when one engine started expelling smoke and other materials.
The second engine was then affected and the aircraft was immediately grounded, leading to fears for its appearance at the show.
And now the organisation which restored the bomber admits it is highly unlikely it will be repaired in time for the event, which takes place on June 30 and July 1.
Richard Gotch, spokesperson for the Vulcan to the Sky Trust, said: "At the moment we are still investigating the extent of the work that will be needed to get her back into the air.
"It would be wrong for us to suggest she will fly at Waddington when the probability is she won't be there.
"Waddington air show is important to us and our people will be working overtime to try and get her back in the air as soon as possible but at the moment it is looking likely she won't be at Waddington."
Work is underway to replace the damaged engines but it could take a long time to get the Vulcan airborne.
"We have got two spare engines which we are going to install but there will need to be lots of tests done on them to ensure the aircraft's safety as they have been in storage for a long time.
"We understand how important the last flying Vulcan is to many people attending the show and we would like to offer our apologies for the likelihood that she won't fly," said Mr Gotch.
Show bosses have spoken of their disappointment at the news but encourage visitors to experience the large amount of activities.
Paul Sall, director of Waddington International Air Show said: "It will be a huge disappointment if the Vulcan is unable to come to the show.
"Waddington is the spiritual home to the Vulcan and we are terribly disappointed.
"There are lots of other things to see both in the air and on the ground and it is probably the best show we have had for a long time.
"At the moment we are looking at what else we could do but we have got aircraft flying from places such as Italy and Australia so there are plenty of other attractions to see," said Mr Sall.
The Waddington International Air Show takes place on June 30 and July 1 and will feature the UK debut of the South Korean Black Eagles display team amongst other international display teams.