Drop rate is higher in Ulduar (3-14%) according to the Armory. This recipe must be skinned by Engineers, it's technically not a mob drop.
|10x Field Repair Bot 110G||Crafted|
|2x Field Repair Bot 74A||Crafted|
|30x Handful of Cobalt Bolts||Crafted|
|2x King's Amber||Mining|
|20x Scrapbot Construction Kit||Crafted|
|8x Titansteel Bar||Crafted|