Apologies avionker, SM's comments are annoying to say the least.
SM I did not say that engineers service the SE - it is as I stated before qualified Aircrewmen. Lifejackets are not allocated to aircraft as Avionker patiently explains - are you saying personal items such as headsets and helmets should be individual to a particular position in an aircraft - I think not!
For your info headsets can be TSO'd so just because an item has a TSO it does not need to be allocated as a pice of aircraft equipment.
If you are really interested CHC, Bond Offshore an BHL all have Part145 C6 (Equipment) approvals. I believe BHL at least have their own SE bay where liferafts and aircraft floats etc can be serviced and packed.