A manager for TransOcean says parts of the blowout preventer that didn't stop the BP spill weren't overhauled, according to testimony in a federal hearing.

The manager says even though a complete overhaul is recommended every five years, the nine year old blowout preventer only got repaired or parts replaced as needed.

The American Petroleum Institute recommends a complete overhaul every five years.

The TransOcean manager says the overhaul didn't happen because the company doesn't treat recommendations as mandatory.