Jet Crash Inquiry Shifts to Tail Section Breakup (new details!)
Some selected quotes from the link:
The tail fin--which helps to keep a plane flying straight--was pulled Monday from the waters of Jamaica Bay and appeared as if it had cleanly broken away from the rest of the fuselage.
The NTSB said the rudder was trimmed to a left deflection of 10 degrees, and Barry Schiff, a retired Boeing 747 captain and air safety consultant, said this appeared to indicate that the right engine had failed.
However, since the bolts remained secured to the main fuselage, suspicion focused on the first possibility, a structural breakdown.
Officials said the vertical stabilizer cracked above its attachment point to the fuselage, while the bolts that were supposed to hold it in place remained intact. They speculated that the problem might be some weakness in the material--a combination of aluminum and a composite material.
So it wasn't the bolts?
If it was the actual material fracturing why haven't they immediatley grounded all Airbuses?