Originally Posted by
JamaicaJoe
SWAG Theories
1) The popular one. Rigging was incorrect, one or more bolts left out that would have prevented the door (not a PLUG) to move from its fully engaged position.
2) a) Photos of one guide pin on the accident plane appear to show a very short length of the guide pin/roller. Its length significantly less than its diameter. b) The dummy door (not a PLUG) differs from an Emergency Exit Door (not a PLUG) in a significant way. The cross bracing is removed to accommodate a larger window. Could the combination of the panel being weaker at that point have allowed the door (not a PLUG) to bow outward and dislodged the upper portion of the door from the guide pins/rollers? The four rigging bolts would do little to retain the door at this point.
Please contact the FAA and show them the error of their ways and have them correct the use of the word "plug" in the Emergency Airworthiness Directive.