Image: Robert McKechnie, Hung Nguyen, Wayne Andersen
Gerald Herbert  /  AP
Coast Guard Capt. Hung Nguyen questions Robert McKechnie of Transocean during a Deepwater Horizon Joint Investigation hearing in Metairie, La., Tuesday. At left is retired U.S. District Judge Wayne Andersen, who is on the investigation team along with co-chair Nguyen and others.
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updated 10/5/2010 1:44:15 PM ET 2010-10-05T17:44:15

Members of a federal panel investigating the cause of the Gulf of Mexico rig explosion and oil spill and how to improve safety and oversight accused rig owner Transocean on Tuesday of thwarting their efforts to get to critical documents and a witness.

The co-chair of the panel, U.S. Coast Guard Capt. Hung Nguyen, told a packed hearing room in a New Orleans suburb that members have been trying for two months to get Transocean to turn over materials related to its compliance with international safety management codes.

Nguyen said the panel also has been unable to get a specific Transocean manager to come in and testify about safety.

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Transocean lawyers said the document request is too cumbersome. They said whether the witness testifies isn't within their control.

Nguyen said one of the key elements the panel has been trying to analyze is the safety culture at the companies involved in the April 20 disaster, including Transocean. He said the panel will have to make conclusions and recommendations whether or not Transocean supplies the information, so he encouraged them to comply.

"We did issue two subpoenas for the same thing. Each time we were told it was irrelevant and burdensome," Nguyen said. "If they are burdensome, that means there is something going on with your safety management system."

Another panel member, Coast Guard Capt. Mark Higgins, said the board has been "thwarted in some respect" in getting to the witness that members want to question.

"I would encourage you to look at this as an opportunity to disprove what we have seen through this small window as to the culture at Transocean," Higgins said.

Transocean lawyer Ned Kohnke said the company has acted in good faith and produced everything it believes it should. He said the panel has the right to go to court to enforce the subpoena if it wants.

"How you can say we are thwarting is beyond me," Kohnke said.

He accused the board of making improper conclusions, not following its own rules of procedure and not asking questions properly of other witnesses who have testified.

"You refer to some of these documents not being hearsay. You are wrong," Kohnke said. "They are hearsay."

He added, "With all due respect, you have been wrong in other regards. We are here cooperating. We have been here cooperating."

Earlier Tuesday, a Transocean official testified that water poured onto the burning rig after the Gulf of Mexico explosion was meant to keep the vessel cool so it could be stabilized, not to put out the fire.

There were missing workers and an intense search and rescue effort ongoing in the hours after the blast.

But Robert McKechnie, a director in Transocean's engineering and technical support group, told the joint U.S. Coast Guard-Bureau of Energy Management, Regulation and Enforcement investigative panel that he believes there was no way to put out the fire with water alone, so the goal was to maintain the integrity of the structure to give officials the best chance of bringing the ruptured undersea oil well under control.

"You're not going to put out an oilfield blowout with water," McKechnie said. "I am not aware of any firefighting effort. I'm aware of an effort to cool the rig."

Also Tuesday, two Transocean workers who were on the Deepwater Horizon at the time of the explosion and were responsible for monitoring the computer system that keeps the rig in place testified about the alarms that went off, the actions of personnel on the bridge and the effort to evacuate the crew. Yancy Keplinger said crew members received a call from the rig floor warning about a well control issue, but there was no time to react because the explosion occurred right after.

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Who was responsible for fighting the fire and how prepared the companies were to respond have been key points of inquiry by the joint U.S. Coast Guard-Bureau of Energy Management, Regulation and Enforcement investigative panel.

Eleven workers were killed, and 206 million gallons of oil spewed from the well, according to federal estimates.

BP PLC's well a mile beneath the sea gushed for three months before being capped in July and then permanently sealed in September. The British oil giant owned the well but was leasing the rig that exploded from Transocean Ltd.

The panel is holding its fifth series of hearings this week. At least one more series of hearings is expected before the panel members begin collaborating on their report, which is due by January.

BP PLC's well a mile beneath the sea gushed for three months before being capped in July and then permanently sealed in September. The British oil giant owned the well but was leasing the rig that exploded from Transocean Ltd.

In related developments Tuesday:

  • President Barack Obama signed a widely expected executive order establishing a Gulf Coast Restoration Task Force. The panel, which was recommended by Navy Sec. Ray , will be led by Environmental Protection Agency administrator Lisa Jackson. Obama's order asks the task force within a year to issue a strategy that will provide a roadmap for restoration efforts.
  • It was announced that another portion of the Gulf was reopened to commercial and recreational fishing after federal scientists found no oil contamination to bar consumption of seafood. The 2,927 square-mile area is located off eastern Louisiana, about 40 miles south of the blown-out BP well.

Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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