date on 28th February 1995. Problems with the ALHS had already caused the airport’s opening date to be postponed and no further delays could be tolerated by the city. The report speculates that delays had already cost the airport $360 million by February 1995.The lack of testing inevitably led to problems with the ALHS. One problem occurred when the photo eye at a particular location could not detect the pile of bags on the belt and hence could not signal the system to stop. The baggage system loaded bags into telecarts that were already full, resulting in some bags falling onto the tracks, again causing the telecarts to jam. This problem caused another problem. This one occurred because the system had lost track of which telecarts were loaded or unloaded during a previous jam. When the system came back on-line, it failed to show that the telecarts were loaded. Also the timing between the conveyor belts and the moving telecarts were not properly synchronized, causing bags to fall between the conveyor belt and the telecarts. The bags then became wedged under the telecarts. This eventually caused so many problems that there was a need for a major overhaul of the system.The government report concluded that the ALHS at the new airport was afflicted by "serious mechanical and software problems". However you can not help thinking how much the city was blamed for their part in a lack of demand for proper testing. Denver International Airport had to install a $51 million alternative system to get around the problem. However United Airlines still continue to use the ALHS. A copy of the report can be found at http://www.bts.gov/smart/cat/rc9535br.html.2.2 Political / Commercial pressures – the Challenger DisasterThere are many examples of failures occurring because of this. One of the most famous examples of these is the Challenger disaster. On the 28th January 1986 the challenger space shuttle exploded shortly after launch, killing ...
