The way I read these media reports, the bellcrank has nothing to do with the accident, but the bolt that came out of the mixing unit had everything to do with it.
Documents detailing the maintenance work on the part were now missing, said counsel assisting the inquiry, Captain Michael Slattery QC. "A bolt appears to have come out of that bell crank ... it was found some distance from the bell crank and buried in debris in a way inconsistent with the fire," he said.