I just caught this story on BBC news. it said that boeing has told the BBC that more than 3000 of its 737s, 757s and 747s could have faulty fuel pumps, which in rare cases could cause mid-air explosion. the pumps were fitted as late back as 1970.
Apparently the alarm was first raised by Easyjet? Although Beoing say that no aircraft will have to be grounded. easyjet has already started replacing the defective parts.
Full story here : http://news.bbc.co.uk/1/hi/world/americas/2277372.stm
P.S. I did search the forum and could not find anything regarding this subject. i apologise in advance if it is a duplicate.