To call the Orks' onslaught into the narrow corridor a bloody mess would be an understatement.

Greenskin fell by the dozen! Most were cut down by the red hot, steaming barrels of the twin-mounted heavy bolter turret in the roof, yet no few fell to the combined fire from the arbites, mechanicus and reinforcing Aviza. Green gobbets, gore and blood painted the exploding hallway. The weirdboy had shouted something in the chaos, the chaos so loud that it even drowned out the brute's angry cry, before the Ork Weirdboy was blown apart in a terrifying warp anomaly that shredded him and three nearby Orks to dust!
Some of the brutes; loaded down with humongous, oversized ork shootas and copious amounts of ammo belts; lurched to the frontline to spray the entire corridor with unrelenting(and poorly aimed!) automatic fire, but they were shot to pieces almost as soon as they had pressed the trigger and started their wild salvos!

Adrianne rested her long, curved power sword behind her back in her left hand as she reached with gloved fingers down for the holster at one of her thighs; pulling out an elongated plasma pistol covered in arcane script that she primed with a muffled whine as the generator on its back shone with an unhealty, unnatural purple light!

[i]"This is like shooting gen-hanced aqua life in a vat!" [/i]

The Psyker thought to herself as she smirked behind her skull mask. Bullets rattled through the corridor, and she slowly raised her pistol and took aim at the Ork mob at the doorway.

With a ravenous shriek from the plasma pistol, it sent a super-heated bolt streaking towards the Ork crowd!

Missed! The first shot passed harmlessly past the head of an Ork shoota boy; only managing to singe the uncaring brute's ear a little; seconds before said Ork's head was blown up by Aviza's incoming fire! With a wince, Adrianne fired again! The second shot hit a moving Ork in the leg, immediately incinerating 80% of the Ork's knee and leaving the brute to stumble onto the floor in a pile of green limbs and ammunition, but missed his torso! 
Gritting her teeth, Adrianne fired four more shots in rapid succession, two of which missed; one melted a greenskin's hand off; and only one succeeded in hitting a brute's helmet, turning the primitive metal helmet into molten slag and boring through the brute's skull as it fell to the ground with a silent scream!

Privately cursing her own accuracy, Adrianne quietly powered down her cooling plasma pistol before placing it back into its holster as if nothing had happened.

"Good shooting!" She spoke to Herold as she stood behind the arbites, pretending she had only been spectating the rest of the fight.

The greenskin had been scattered. The entrance to the corridor they had come through was filled with the mutilated remains of more than two dozen dead Orks. The survivors were currently fleeing back the way they had come, some of the running brutes jeering or calling back with taunts as they fled even as some of their numbers were killed or brought down by errant shots!

The Psyker turned to look down at the corridor below from her vantage point; her tattered cloak flowing behind her as she walked to the edge to give a wave down at Aviza!

"The Ork intrusion is dealt with in this corridor! What is the state of the titan?"