1.   At Weidlinger he established a particular expertise in the analysis of structural failure.

2.   A team of air-accident investigators has discovered that unused tracks on cockpit voice recorders can reveal when an aircraft is about to suffer a catastrophic structural failure.

3.   Certain measures will be taken as we begin to understand the structural failures that occurred in Washington and New York.

4.   Did the jet suffer a structural failure in the tail as the pilots battled a jammed stabilizer that was making control difficult?

5.   Gerstenmair said the cooling tubes will be inspected this week with for signs of a perforation from a debris strike, corrosion or structural failure.

6.   In the crash of private planes, investigators look for engine failure, structural failure or other mechanical or electrical problems.

7.   Investigators said they suspect the collapse was caused by structural failure.

8.   NTSB officials already have ruled out bombs, adverse weather, faulty braking systems and structural failure.

9.   Or the hull could have suffered some kind of structural failure.

10.   Preliminary examination of the wreckage revealed no evidence of an in-flight structural failure or fire, the report shows.