Park owner Stephen Bristow said the mistake should have been spotted during safety checks.
In a statement, Bristow Helicopters said it would take over the service from 2013 to 2017.
CHC, Bristow and Bond have delayed operations of EC 225 and L2 Super Pumas, during the investigation.
Bristow said an element of the night vision kit had required an export agreement with the US State Department.
The UK helicopter search and rescue contract has been won by Bristow Group.
Mr Stonestreet's cousin, Andy Bristow, said reports claiming Mr Stonestreet was knocking down the wall with a sledgehammer were wrong.
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Bristow said the machines would be the first aircraft in Europe to have Trulink wireless for communications between the crew.
"We get the best advice we can find, " Mr Bristow said, adding there was no legal requirement to have an inspection.
"Operations are running normally, people are at work, " Randgold Chief Executive Mark Bristow said from his Loulo mine, 215 miles west of Bamako.
Helicopters to be used in coastguard duties from the summer will be equipped with the latest night vision goggle technology, operator Bristow has said.
Barneveld missed out on the chance to equal Eric Bristow's record of five BDO world titles with a 7-5 loss to Klaasen on Sunday.
Keith Bristow, the head of the National Crime Agency, is expected to meet North Wales Police on Thursday as he prepares to lead the investigation.
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The government has set up a fresh investigation into claims of abuse at the care homes, led by Keith Bristow of the National Crime Agency.
Bristow will take over the short-term coastguard contract from July 2013.
Beijing is in the middle of a programme to improve its navy, launching its first aircraft carrier, Liaoning, two years ago, the BBC's Michael Bristow reports.
When news of the incident spread, other migrant workers - most from far-off Sichuan province - went on the rampage, says the BBC's Michael Bristow in Beijing.
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The gap contract Bristow was awarded last year will see its crews formally begin coastguard work from Sumburgh on 1 June and Stornoway on 1 July this year.
Critics say the industry benefits a handful of U.S. stakeholders, including Representative Skye McNiel, who introduced HB1999 and whose family-owned horse auction in Bristow, Oklahoma stands to profit.
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Bristow's says its helicopters and pilots have already rescued more than 7, 000 people in the UK. It also operates in the Netherlands, Norway, Trinidad and Tobago, Australia, Russia, Brazil and Canada.
The inquest jury heard Mr Bristow had taken a decision to open a zip wire at the park in November 2010 and after researching and taking advice had opened SwampFlyer on 17 April 2011.
The rest of this long field is made up of the English Democrats, a Trade Union Socialist, another independent and someone calling himself Clint Bristow, who has not described himself as anything on the official nomination papers.
The line-up in this series included former Coronation Street actress Helen Flanagan, boxer David Haye, Made In Chelsea star Hugo Taylor, entertainer Brian Conley, Conservative MP Nadine Dorries, former Doctor Who Colin Baker, actress Linda Robson, and darts legend Eric Bristow.
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The pair had announced their intention to sue National Crime Agency director Keith Bristow in his role as head of Operation Sacristy along with North Yorkshire, Warwickshire and West Yorkshire Police - the forces whose officers are involved in the investigation.
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Rod Bristow, president of Pearson UK, which owns the Edexcel exam board, said there was "much to be learned from the events of this summer", but said he was pleased that the courts had "found that our awarding processes were rigorous and fair".
Back in 1990, Taylor surprised the darting world by defeating his mentor Eric Bristow 6-1 in the final of the World Championship at the Lakeside, and then was involved in one of the greatest finals ever two years later, winning his second world title in a sudden-death leg against Mike Gregory.
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