I Hear You Knocking

I Hear You Knocking is a side quest in Fallout: New Vegas.

Synopsis
The Boomers would be a formidable ally for Caesar's Legion; Lucius wants the Courier to form an alliance with them as well as retrieve a Howitzer firing mechanism to get the Howitzer in The Fort operational and ready for the Second Battle of Hoover Dam.

Walkthrough

 * 1) Speak to Lucius.
 * 2) Go to Nellis Air Force Base.
 * 3) Make allies with the Boomers, if you have not already. This can be done by completing the quest Volare!
 * 4) Get a replacement firing mechanism for The Fort's howitzer. One can be found at Nellis Air Force Base, in a correlated building near Pearl's barracks, in a gun cabinet.
 * 5) Bring the replacement back to Lucius.

Behind the scenes
The title of the quest is a cultural reference to the song "I Hear You Knocking", written by Dave Bartholomew and Earl King and recorded in 1955. With probably the best known version being that of Fats Domino in 1961.