Since there is a bit of lamp swinging going on, here's my experience.
Brent Field, far north sea and rig shuttles/bus runs carried out with our Bell 212s in the mid 1970s. Coming in to land on one of the smaller decks one of the PT6 TwinPac decided to have a significant cough,so I landed well off to one side of the (smallish) deck to leave room for a Bo105 to bring in a Ginger Beer or two to have a look. Eventually they turned up and diagnosed a power turbine departure; much discussion and I agreed to S/E ferry it back to our home platform as long as it was defuelled and we had approval from Redhill.
Both requirements ticked off, hassle free flight back.
Except that in the washup it turned out that a small porky had been told, and no approval sought nor given. Lesson learned, trust but verify
