The Maintenance Department is the area where any malfunctioning Bendy Land attractions and/or rides were repaired and returned to working order.
Similar to the ink maze from Chapter 3, it is a large room flooded with ink and two trains, and the corpse of a Piper can be found laying on a box holding a tower of Ink Hearts. A poster that says "RIDE THE BUDDY BORIS RAILWAY". Multiple posters and Bacon Soup advertisement images can be found printed on walls. A tape of Joey Drew can be found, along with a lever and an upstairs area with a photo booth and another lever.
Henry enters and finds himself in the first room. This room has two small desks in it. Then the second room has a Little Miracle Station which is used later and a Bacon Soup can.
Descending some stairs, Henry sees the Projectionist walks past, letting Henry know he's there. Henry must sneak past and hit the Lift switch. This enables access to the top floor. Up there is a can of Bacon Soup, a photo booth and the main switch. If Henry is seen by the Projectionist, he will chase him up these stairs and pursue until Henry hits the switch. All the lights will temporarily go off and the Projectionist will have mysteriously disappeared.
As soon as Henry heads back up the stairs to the exit, the Projectionist will reappear and chase him to the Little Miracle Station. The Projectionist will stop and peek inside. Just as he's about to break in, Ink Bendy will appear and the two fight. After they exchange blows,Ink Bendy gains the upper hand and lifts up the Projectionist, draining the life out of him before tearing off his head and throwing it at Henry. Ink Bendy glares at Henry and drags the Projectionist's body away. Henry can then leave and give full power to open up the Haunted House.
If Henry returns after activating the Haunted House, the chest on the top floor can now be opened. Inside is a disc. Picking this up will change Henry's main weapon of a Gent pipe in the last fight to a plunger.
- There are two Bacon Soup cans here. The first is hidden under some piping in the second room. The second is on a barrel on the top floor.