Field Repair Bot 74A

The schematic can be found on the floor near [npc=8983] in [zone=1584]. Only engineers with 300 skill may learn the schematic after clicking on it.

If you are not familiar with the instance and want to find the fastest way to get Field Repair Bot 74A This is the easiest way to get there:

Enter the instance and go left through the gate, then turn right and go through the other gate. Ahead will be a troll npc next to a door, enter that door. You will see stairs in front of you, go behind them and click on the giant gear and then take the stairs. Once up take your left through the tunnel and keep going using the map to reach Golem Lord Angelmach. The schematic will be on the floor right next to him.

Good luck with your Jeeves !

This schematic is actually obtainable by solo rogue engineers.
Stealth into BRD, lockpick the two doors and the big wheel that gives you access to the hallway leading to General Angerforge, then proceed through the room packed with gnomes and golems - all pretty straightforward.
Once you are in Golemlord Argelmach's room, you will see the plans on the floor ahead of you slightly to the right - right of them are a pair of metal barrels.
Stealth over the plans and position yourself in the corner made between these barrels and the wall and activate the plans - if you are level 60 you will not aggro Argelmach, and the repairbot is yours without having killed a single mob ;-)

(Note that you will need to be 300 engineer or above to be able to read the plans - also, i cannot guarantee that this works if you are below 60 since i was 60 myself when i did it.)