Europe’s aviation safety body has handed down an airworthiness directive (AD) for a number of Airbus helicopter models.
The notification asks for varying degrees of inspection and corrective work to be carried out on SA365s, AS365s, SA366s and EC155s.
Helicopter operator Bristow has an EC155 in Norwich, which operates in the southern North Sea.
A Bristow spokeswoman said the company would comply with the directive.
A spokesman for CHC said the business did not operate any of the aircraft included on the directive in the North Sea.
Babcock said the directive did not apply to any of its helicopters.
The AD is an updated version of one that was first issued in 2011 by the European Aviation Safety Agency (EASA).
The initial order was created that year after a helicopter lost tail rotor pitch during landing.
The EASA said: “Investigation determined that the event had been caused by significant damage to the tail gearbox (TGB) control rod double bearing.
“This condition, if not detected and corrected, could lead to loss of yaw control of the helicopter.”
An Airbus spokesman said: “This AD is a revision to an existing maintenance measure to make it clearer and easier to comply with and does not add any additional maintenance burden.”
The revised AD was issued in the same week that Sikorsky S-92s were recalled following an emergency landing on a North Sea helicopter in December.
The aircraft were brought in for additional interim inspections on their tail rotor pitch change shafts.
An investigation by the Air Accidents Investigation Branch said a damaged tail rotor piston had caused the difficulties when landing.
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