It follows an incident which saw a S92 spin more than 180 degrees on landing.
One-off inspections of the tail rotor on all S92 helicopters around the world took place last week, following the incident on the West Franklin platform in December.
Operators are now being told to increase inspections on the aircraft's tail rotor.
No-one was injured in the incident, but there was significant damage to the deck of the platform.
As a result of the initial safety checks, 11 tail rotor bearings were returned to manufacturer Sikorsky for further tests.
The Federal Aviation Administration has now said further inspections using specialist cameras must be carried out every 10 hours of flying time.
North Sea operators said they were fully complying with the latest directive.

Hong Kong's Hang Seng index closed up 0.2% at 21,914.40, while the Shanghai Composite ended down 0.4% at 3,539.18.
The index was 9.4% higher for the year, making it one of the best performing markets globally.
Investors were also holding off ahead of manufacturing data due out on Friday.
The data should shed light on the extent of the slowdown in the world's second largest economy.
Economists expect the manufacturing surveys to show factory activity shrinking again in December.
Several markets closed early on New Year's Eve such as Hong Kong and Australia, while Japan and South Korea were closed for public holidays.
In Sydney, the benchmark S&P/ASX 200 index closed down 0.5% to 5,295.9, but lost more than 2% for the year.
That marked the index's first annual fall since 2011 as slumping iron ore and metal prices hit blue chip mining stocks, while new rules hurt the banking sector.
Sliding oil prices hovering around 11-year lows capped gains in energy-related stocks in Australia and across the region.
"The correlation between moves in the oil price and equity markets are becoming increasingly concerning and do not bode well for today's Asia session," said market strategist Angus Nicholson at trading firm IG in a note.
Crude oil prices held losses after falling 3% overnight.

Furious 7 has already out-grossed all previous instalments of the 14-year-old franchise and has now made more than $800m (£546m) internationally.
With DreamWorks animation Home berthed at two, new release The Longest Ride could only muster a third place debut.
The rodeo-based romance made $13.5m (£9.2m) between Friday and Sunday.
Starring Clint Eastwood's son Scott, the film is the latest to be adapted from a best-selling novel by Nicholas Sparks.
Further down this week's Top 10, Woman in Gold appears at seven after expanding its release to more than 1,500 locations.
Starring Dame Helen Mirren, this story of an attempt to recover art looted by the Nazis made $5.9m (£4m) in its second weekend in North American cinemas.
According to Screen Daily, Furious 7 has now made more than $39m (£26.6m) in the UK and Ireland, where it was released as Fast & Furious 7.

Police opened fire and used tear gas to disperse the crowds, but the news of the death brought more protesters onto the streets of the city of Srinagar.
The area was in a security lockdown during Mr Modi's visit.
Kashmir, claimed by both India and Pakistan in its entirety, has been a flashpoint for more than 60 years.
The two South Asian rivals have fought two wars over the region in the Himalayas.
During his one-day trip, Mr Modi steered clear of discussing politics.
Instead, he focused on an aid package to the region, promising $12bn (Â£8bn).
Mr Modi expressed hopes that his could "change the fate of Kashmir".
"I want to build a new Kashmir, a powerful Kashmir," the prime minister said.
But several separatist leaders warned that a political problem could not have an economic solution.
"PM Modi has made the same mistake of weighing the Kashmir issue in rupees," said Omar Abdullah, the former chief minister of the state.
Additional checks are being carried on a North Sea helicopter fleet in the wake of safety fears.
[NEXT_CONCEPT]
Chinese stocks were mostly lower on the last day of 2015 in thin trading with some of Asia's biggest markets closed ahead of the new year.
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The latest Fast and the Furious film is still top dog at the US and Canada box office, having taken $60.6m (£41.4m) in its second weekend in cinemas.
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A demonstrator has been killed in clashes with government troops in Indian-administered Kashmir, following a visit there by PM Narendra Modi.