According to Plan

Hundreds of void black armoured assault pods powered in waves to the surface. Secondary batteries of turbo cannons from the three ships engaged the Hulk. There was no return fire from the Hulk. Turbo penetrator rounds blasted holes in the outer shell of the Hulk, penetrating the armour and into the habitat beneath. Geysers of debris spouted from the holes spewing tumbling orks and grots their equipment and debris into the void. Other rounds scoured the surface of the hulk of any defenders with cinematic patterns of mathematical explosions around the target locations for the assault pods.

Captain Pilgrim reported to Hawk, "Debris scanning indicates the Hulk is infested with greenskins, Sir"
"Seems we will be doing the job of the Ordo Xenos again," remarked Hawk.
"We need the Hulk in any case. Proceed with the assault."
"It looks as if the Orks have not mastered any of the defensive fire power that these Hulks usually carry."

Just before impact each pod instantly switched from power from rear to nose engines, adding their searing fusion flame to the scouring of the surface of the Hulk in a cruel and brutal deceleration. Space Marines groaned in their armour. They were held in place by the monomolecular threaded crash webbing that had been blessed by the techpriests before launch. The first wave of pods crunched to the outer hull of the Hulk. Webbing snapped open and Grey Knight terminators and Deathwing terminators rushed in a spreading fan of assault squads from the grounded pods, heading for the breaches in the hull. At that moment shaped charges detonated across the landing zones blasting the surface occupied by the assault for and its pods down into the mighty hangar below where the Ork counter assault waited.

"Anuvver cunnin plan and a good fight comin up," screamed Harzakk at his Nobs. "Get stuck in, chop all de humins, Now!" He waved them forward with his big choppa. All the nobs were power armour suited which gave them a prolonged stay in vaccum. They shambled forward joints wheezing in the cold vacuum of the void. They were backed up with all the killa kans and closed cabin trukks and vehicles.
It was my plan you useless over-grown grott thought Garzakk. And why dont yous let us blast them now while they are fallin and lyin' in heaps. He fired his blasta narrowly missing Hezakk and killing a grey knight struggling to stand.
"Watch wot you are doin," screamed Hezakk.
"One to me already," retorted Garzakk.