http://en.wikipedia.org/wiki/Carnival_Splendor
On November 8, 2010, at approximately 06:00 Pacific time, on the second day of a voyage from Long Beach to the Mexican Riviera, the ship experienced a fire in her engine room, cutting all electrical power. According to Carnival president, Gerry Cahill, a "crankcase split, and that's what caused the fire," adding it was isolated to the aft generator room.[13] The fire was extinguished by the afternoon, and no one was injured. Nearly 4,500 passengers and crew members were onboard at the time.[14]
The crew was unable to restore power to the engines, and the ship was towed by tugboat to San Diego.[15][16] Without power for air conditioning and refrigeration, passengers were fed rations delivered via U.S. Navy helicopters from the aircraft carrier USS Ronald Reagan.[17]
Splendor was escorted by, and received aid and security assistance from the U.S. Coast Guard Cutter Morgenthau.[18] Carnival Splendor arrived in San Diego under tow around sunrise on November 11, and docked around noon.[19]
It was reported that Carnival has promised to give all passengers a full refund along with a voucher for a free cruise of equal value to their cruise on Splendor, along with reimbursement for their travel expenses.[20][21]
The ship has three engines in the aft engine room and three in a forward engine room. Each generator is connected to the two switchboards. The failure of a single engine or generator should not normally cause a total power loss.[22] Clark Dodge, former chief engineer for Washington State Ferries, said, "If things were designed properly, all the power shouldn't have gone out."[22][23] The reasons for the total power loss are presently unclear and are under investigation
http://en.wikipedia.org/wiki/Costa_Concordia
On Friday January 13 2012, the Costa Concordia ran aground on a reef at around 21:00 local time (UTC+1) off Isola del Giglio, having left Savona earlier that evening at the beginning of a seven-day cruise and intending to visit Civitavecchia, Palermo, Tunis, Cagliari, Palma, Barcelona, and Marseille.
It was reported that at about 20:00, passengers were in the dining hall when there was a sudden, loud bang, which a crew member (speaking over the intercom) ascribed to an "electrical failure". "We told the guests everything was okay and under control and we tried to stop them panicking," cabin steward Deodato Ordona recalled. It was about an hour before a general emergency was announced, he said. "The boat started shaking. The noise - there was panic, like in a film, dishes crashing to the floor, people running, people falling down the stairs," said survivor Fulvio Rocci. Those on board said the boat suddenly tilted to the port side.[14] Passengers were later advised to put on their life-jackets.[15] The ship later developed a list of approximately 20° to starboard, the change creating problems in launching the lifeboats, with some passengers jumping into the water to swim to shore. Six people reportedly drowned after jumping overboard, and another seven were critically injured.[1] According to the local coastguard, 3,206 passengers and 1,023 crew members were on board at the time.[16]
I wonder if there's an inherent flaw in the electrical systems of the class?