I don't see what the issue with providing a few theories as to why the door flew open. Some of us who actually poll the 1900D would like to know if this was a crew or maintenance stuff up, or if this is a design flaw in the 1900.
The fact is, as has been mentioned, either the crew missed the master warning, or the master warning wasn't there, which means it's maintenance related. I highly doubt that it is a design flaw, as I'm sure there would have been some kind of communique from Raytheon.
Oh, by the way not all 1900 operators are dodgy boet. I fly for an operator that has contracts with oil and gas companies that have enormous hour requirements, and are audited heavily almost on a monthly basis. The maintenance is all done by the book, and our aircraft are almost always snag free.
Anyways, the point is I'm sure there is a valuable lesson to be learnt from this whole episode, and I'm glad to hear it won't be swept under the carpet.