LOL @ the robo comment...
As said before, Land immediately:
Conditions that may result in severe injury or fatal outcomes: Generally speaking in a land immediately situation the pilot could assume that the Helicopter will most likely suffer significant damage however, as can be seen from the below list of potential reasons the helicopter may already be suffering from significant damage.
Cabin Fires, and uncontrolled engine fires.
Main Transmission malfunctions... Grinding gearbox with known other conditions such as High temp, No Oil, chip lights.
Hydraulic failure of one system (dual system) with impending failure of the secondary system (that'd be some scary crap).
Main Rotor damage resulting in an imbalance (probably don't have long before tranny is torn apart).
Completely out of fuel over hazardous terrain with no prospect of making it to a safe landing area before flameout (over water or some of those very large forests/mountainous areas).
Single pilot ops where pilot is suffering from imminent incapacitation (Heart Attack/Stroke/Seziures).
Replacing a helicopter is cheap compared to the cost of medical bills, lost lives, lawsuits and lost customers/clients.