Another Cougar helicopter had to cut an offshore flight short because of issues with the aircraft.
The chopper was on its way to the West Aquarius oil rig on Saturday when it was forced to return to St. John's after the Tail Rotor Servo Pressure indicator light came on.
There were seven passengers on board. Statoil said the helicopter arrived in the city without incident.
Cougar's search and rescue helicopter followed the flight back to the base as a precaution.
No emergency was called, and the pilots didn't request assistance.
It's the second recent incident involving problems with Cougar helicopters.
On Sept. 25, a chopper was grounded on the Henry Goodrich oil platform because of what was believed to be a problem with its autopilot system.