From Halopedia, the Halo wiki
That year, the Pelican was used during the Battle for Earth. There, Echo 051 and another unknown Pelican were sent to retrieve John-117 and Thel 'Vadam, as well as Sergeant Major Avery Johnson and several Marines.
Unfortunately, the two Pelicans were ambushed by Covenant Banshees and Phantoms piloted by the Brutes. Echo 051 was able to maneuver away from the enemy fire, even though it took a direct hit on its front starboard engine as it was loading soldiers, spinning out of control and crashing upside down near a cliff where its survivors, including Sergeant Johnson, were captured by the Brutes. Its unknown wingman spun in the same direction but crashed in the river, sinking to the bottom.
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