The Air India case has been the most expensive in Canadian legal history

The reassembled wreckage will be used as key forensic evidence in the trial of two Sikhs charged in connection with the attack, which killed 329 people.

It will be displayed to the jury at a secret warehouse in the Canadian city of Vancouver.

The trial started in April, 2003 and has heard 120 days of evidence.

Secret warehouse

The chief prosecutor in the trial of Ripudaman Singh Malik and Ajaib Singh Bagri said that the reconstructed aircraft is physically too large to fit in the high security courtroom.

The judge in their trial has ruled that security concerns will require the jury to go to the secret warehouse to see it.

Ripudaman Singh Malik is on trial along with Ajaib Singh Bagri

Although much of the aircraft has never been recovered, parts of it were recovered by divers from the Royal Canadian Mounted Police from the ocean floor near Ireland between 1985 and 1991.

Flight 182 was bound from Canada to London when the bomb exploded.

The chief prosecutor said that the reconstruction of the jet had been kept a closely guarded secret.

The location of the bomb within the hold of the plane is a key part of the case. The prosecution says it was planted at the back of the plane were luggage is concealed.

They allege that the defendants planted it on a plane leaving Vancouver international airport which connected with the Air India flight.

So tight is security that the two defendants will not be permitted to go to the warehouse, remaining behind bullet resistant glass in the fortified court room built especially for their trial.

The prosecution alleges that the attack on the aircraft was carried out by Sikh separatists seeking revenge for the Indian army's 1984 storming of the Golden Temple in Amritsar.

Mr Bagri and Mr Malik have pleaded not guilty to charges in connection with the Air India attack and a second bombing at Tokyo's Narita airport.