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Which were conducted just hours before the explosion. transocean, one of the world's largest operator of drilling rigs, says it has no reason to believe that the rig's fail-safe device called a blowout preventer, was not fully operational. but we've learned from cameron, the manufacturer of the blowout preventer, that the device had a leak in a crucial hydraulic system and a defectively configured ram. >> internal transocean documents reveal the fail-safe blowout preventers had 260 known scenarios for failure. back in 2001. this one had been modified so one of the rams it uses to force the pip...

Official, significant pressure discrepancies were observed in at least two of these tests which were conducted just hours before the explosion. transocean, one of the world's largest operator of drilling rigs, says it has no reason to believe that the rigs fail-safe device called a blowout preventer, was not fully operational. but we've learned from cameron, the manufacturer of the blowout preventer, that the device had a leak in a crucial hydraulic system and a defectively configured rap. >> internal transocean documents reveal the fail safe blow outpreventer had 260 known scenarios for failu...

Official, significant pressure discrepancies were observed in at least two of these tests which were conducted just hours before the explosion. transocean, one of the world's largest operator of drilling rigs, says it has no reason to believe that the rigs fail-safe device called a blowout preventer, was not fully operational. but we've learned from cameron, the manufacturer of the blowout preventer, that the device had a leak in a crucial hydraulic system and a defectively configured rap. >> internal transocean documents reveal the fail safe blowout preventer had 260 known scenarios for failu...