Recently delivered 767 aircraft are the most likely to have a problem with stringers that had been affected by previous overheating during manufacture, which apparently renders them susceptible to cracking. Boeing already notified all its 767-300 customers that parts of the wing structure near the central fuel tank may be susceptible to cracking.
http://www.nytimes.com/aponline/f/AP...uel-Tanks.html

ALSO:
Recall the FAA is also worried that bulkhead cracks could cause a loss of cabin pressure on "older" Boeing 737's. But it is not TOO worried. This FAA-ordered inspection of about 2,500 planes must be done- but they gave the affected carriers 4 years to complete the job/review!


[This message has been edited by doc (edited 03-31-2000).]