The way we were - Ansett, TAA, Qantas

[Fantome]

The failure of the right wing of RMQ was found to be due to the use of incorrect and excessive force.

from wiki -


The investigation determined that some years before the accident, the bush at Station 143 had been pushed upwards so the chamfer and 0.055 inch (1.40 mm) of the parallel-sided portion protruded beyond the upper surface of the boom. The exposed end of the bush was then struck with a conical tool applied to the bore. This action slightly flared the exposed end and left the external diameter 0.0038 inch (0.097 mm) oversize.[14] The bush was then pushed upwards out of the hole and re-inserted from the lower surface. As the bush was being re-inserted its flared end broached the anodised material and a small amount of aluminium from the wall of the hole. This broaching action scored the wall of the hole and left its diameter slightly oversize so the bush was not an interference fit anywhere except at its flared end. Scoring of the wall of the hole and the absence of an interference fit left the inner lower boom vulnerable to developing fatigue cracks at Station 143.[15][16]
Despite exhaustive investigation it was not possible to determine when, why, or by whom, the bush at Station 143 had been flared with a conical tool, removed and then re-inserted in the bolt hole. Investigators could not imagine circumstances in which a responsible tradesman would take these actions.[7][17]