The AW139 and EC225 also use heated mats & slip rings.
The AW139’s FIPS system uses one 45 kVa and one 25 KVa generator, plus Goodrich duratherm mats. The MRBs use a ‘zoned’ heater mat approach.
The EC225 uses 30/40 kVa alternators (like the SP), with the MRB heater mats’ heating ‘cycle’ varying according to the external temperature.
I/C