Instructions
Clear the beginning portion of enemies and plasma turrets after exiting from the back of the dropship.
Head toward the anti-aircraft Wraith, firing green plasma at your supporting aircraft. Leap atop the forward hatch, avoiding fire from the Wraith.
Stand on the front hatch and look straight down. Melee the hatch with the "B" button until the hatch pops off.
Identify the Brute's head inside the hatch. Make small adjustments to your location until the "Hold RB to Board Enemy Wraith" is not seen. Melee the Brute once more in the head to pop his helmet off.
Hold RB on the controller. Press the right trigger to shoot the Brute a couple times in the head to kill him. You will board the Wraith.