Ok, i think I know how to get it, or at least start us off in the right direction, but its extremely complicated: Ok, at the very beginning of "The covenant", run past the enemies and aim your spartan laser at the anti-air wraith tank. Shot it dead so that the Hornet that spawns flys around in a large circle. Proceed to kill the enemies around you. Next, when all the enemies are dead, equip yourself with two plasma pistols. Here's where it gets hard. You must time your shot correctly so that the hornet falls closest to the canyon wall. I was able to do it once. On the second try now, very difficult. When your charged shot hits the hornet, the hornet should power down and begin decending. continue firing charged shots at it so that it does not repower. When it hits the ground (it needs to hit the ground as if it were landing), jump onto its roof. If you do not do this, then the hornet will flip itself and you will die. You cannot enter the cockpit, you must be on the roof. Now, the hornet should fly upwards if you shot it at the right spot. It will fly above the canyon wall which you shoudl now jump on. Upon jumping on the canyon wall go right. This is as far as I got. I went left which turned out to be the wrong way to go, causing me to do it again! You cannot shoot the driver out of the cockpit, and the hornet ALWAYS spawns. There is never a time when it does not. I am currently doing it on normal difficulty.