Boeing selects Honeywell’s APU for the B-52

The B-52H bomber will no longer require an external cart nor gunpowder cartridges for starting up its engines in future. Boeing is said to have selected Honeywell's 36-150 auxiliary power unit (APU) as part of the Commercial Engine Replacement Program.

https://www.aerospacemanufacturinganddesign.com/article/boeing-selects-honeywelld-apu-for-b-52/