Security? Yeah Right

Quest giver: Overvolt Rigster the IV
Requirements: Engine Room Schematics
Reward: Ak`Anon Strike Force +18, Ancient Citrine Faycite Trisection

This mission takes place on the 3rd floor on the zone with no spawns anywhere else. Here you'll need to kill at least 5 "a mechano steam sentinel". Nothing in the instance respawns and rarely only 4 sentinels will spawn. In addition to the sentinels you need to kill Security Officer Fizzlebing, level 85 and hits for just shy of 3k. Loot a Guardian Mechano-Security Clearance Cube from him and return it to Overvolt to complete the mission.