Specifically for the AW139, the RFM contains this disclaimer:
EMERGENCY LANDING GUIDANCE
Throughout this Section, three terms are used to indicate the degree of urgency with which a landing must be effected. In cases where extremely hazardous landing conditions exist such as dense bush, heavy seas or mountainous terrain, the final decision as to the urgency of landing must be made by the pilot.
As to the "confirm fire" part of the procedure, I always ask "What's burning?". Logically, there are three options: Fuel, Oil, or Electrical. Any of those three should provide supporting information such as fluctuating fuel press or engine oil press. An electrical (generator) fire would also have accompanying problem indications on the electrical panel and/or CAS.
It's also helpful to remember that titanium is used in and around the engine bays and that the material is required to withstand/contain the fire for 15 minutes in a transport category helicopter. Hopefully, it can be extinguished long before that or a landing can be affected if it does not.
Last edited by HLCPTR; 4th Jan 2016 at 18:24.
Reason: Typo