2025 loss has record of Subsystem Hold with all 3 dropped…
2020 loss has record of Subsystem Hold with only 1 dropped…
In 2017 CCP changed T3 Cruisers from 5 active subsystems to 4 active subsystems and implemented the 3 sub max Subsystem Hold… These next ones were fit with 5 Subsystems and there’s a very high chance that I didn’t carry any extra sub’s… Anyway, here’s the other T3 Cruiser losses…
2013 loss has no record of extra subsystems in Cargo list…
2011 loss has no record of extra subsystems in Cargo list…
Strange thing I noticed about all 4 of those ship losses, each loss shows all active fitted sub’s were destroyed with the ship…
So in answer to your question - yes, the Subsystem Hold can drop sub’s as loot…