Most of the leasing companies want the ac returned with zero hours on the major components and a g check. That's about $2m worth of work to hand back an ac which now has little value commercially (at the moment at least). The losers here will be leasing companies by miles.
Except CHC being in Chapter 11 who can hand back the aircraft as is where is. BRS have an additional problem in that many of their aircraft are owned by their own internal leasing company and then leased to their respective business units. It depends where BRS want to take their losses, in the BU or the leasing company.