North South, "ipsis literis"? Is that Portuguese or Latin? One t or two? Had to google it myself, but good to know that the pilot community strives for a higher cultural standard.
To Savoia's simplistic matrix, this would then fall into a mechanical problem as opposed to a pilot error problem. But in true HFACS fashion, you could compare the positive outcome of the similar Hong Kong mechanical failure to the negative one here and determine why the difference. Were the pilots exposed to two different training regimes -one of which improved the outcome of a technical fault? That would be an organizational issue.