PPRuNe Forums - View Single Post - Alaska Airlines 737-900 MAX loses a door in-flight out of PDX
Old 6th Jan 2024, 15:29
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unmanned_droid
 
Join Date: Oct 2013
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Originally Posted by Consol

Shouldn't there be bolts in these holes? Anyone got any fancy enhancement apps to see if the holes have any stubs left in them?
If you mean the permanent attachment points for the panel, there are blind fastener heads in the holes. It is interesting that one of the fastener heads (right hand side 2nd down) is tilted like it suffered a head/shank failure. This could be the last fastener to fail, although it seems less likely as it's on the forward edge. Since this was a 'new' aircraft I suspect that this panel was not secured correctly during manufacture, allowing air pressure leaks and fretting type failure of a fastener that then allowed dynamic pressure under the panel and pry it off.
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