According to Howard Caroline, a senior structural engineer with the underground, there had always been rumours about the spiral escalator at the station but it was not until late 1988, during a routine structural inspection, that an engineer climbed through a duct next to the line and discovered the machinery, covered in rubble. (newscientist.com)
Conventional metal - based aircraft like the Boeing 767 or the Airbus A330 have a service life of 30 years but require a second major structural inspection after 12 years in operation. (scientificamerican.com)
It is our wish that you browse through these reports and see how they relate, if at all, to your circimstance and whether or not to perform additional inspection serves over and above a good old fashioned structural inspection. (vanguardhomeinspection.com)