Investigators probing the loss of Swissair Flight 111 have found evidence of what they are calling "heat stress" on small pieces of cockpit wreckage recovered from the sea.

Lead investigator Vic Gorden revealed the finding at a press conference but declined to go into further detail. The phenomenon is in line with the crew's report to air traffic control that it had smoke in the cockpit shortly before the crash.

The investigators also say that some recovered bodies of passengers were wearing life-jackets.

The search for the aircraft's cockpit voice recorder (CVR) is expected to resume when weather permits, says Canada's Transportation Safety Board.

Canadian Armed Forces divers detected the CVR's homing beacon on Sunday but were unable to locate the device. Since then they have been joined by the USS Grapple, a ship equipped with cranes able to lift large pieces of aircraft wreckage off the ocean floor.

TSB spokesman David Austin says it was not possible to dive onto the wreckage on Tuesday because of the weather.

The Boeing MD-11 crashed into the sea off Nova Scotia last week killing all 229 occupants after the crew had begun a diversion to Halifax airport having reported smoke in the cockpit.

Source: Flight Daily News