MOHALI: The preliminary probe has found that the rusted lower portion of the main power tower was the main cause for collapse. The high-tension wires fixed with other two towers could not withstand the pull pressure and gave way. The PSPCL inspection team failed to notice the rusted base of the main tower that collapsed first.
PSPCL CMD BS Sran ordered the probe by a two-member committee of chief engineers and they have been asked to submit the report within 10 days. The towers were installed 23 years ago and thereafter no inspection was done to find faults.