An inquest heard claims that an incorrect bearing in a de-icing machine led to the death of an airport worker.
At the inquest into the death of David Ralph at Dublin Coroners Court, forensic engineer John Hayes said that the bearing used as part of the boom arm in the de-icing machine was "not fit for purpose".
Mr Ralph (58) from Brackenstown in Swords, Co Dublin, was an employee of SR Technics and was standing in the de-icing machine's basket at the end of the boom arm working on a City Jet plane in the early hours of March 19, 2008, when the accident happened.
The basket plummeted to the ground. Mr Ralph suffered severe head injuries and was pronounced dead at Beaumont Hospital shortly afterwards.
Coroner Dr Brian Farrell adjourned the inquest to March 13 to hear further evidence.