Even Kiltow's memories of his childhood holidays at a mountain cabin outside Portland revolve around garbage.

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That comment referred to how Dorner, 33, a fired Los Angeles police officer and former Navy reservist, was believed to have been killed Tuesday in a vacant mountain cabin outside Los Angeles.

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As in earlier jets, the agency wanted assurances that in the event of a battery emergency, the high temperatures wouldn't damage surrounding structures and any smoke or fumes would be sucked outside rather than into the cabin.

WSJ: All Boeing Dreamliners Are Grounded

Ventilation can involve either 100 percent fresh air in which outside air enters and leaves the cabin in a single pass or a system in which various fractions of air are recirculated from the aircraft cabin and mixed with fresh air.

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If the regulating valves fail or if the cabin structure is breached (by a failure of a door or window for example) then the pressure in the cabin would suddenly drop to match the outside air pressure.

BBC: NEWS | Europe | Dangers of aircraft decompression

During her five-day cruise, a water line broke in the hallway ceiling near her cabin, and a separate sewer line broke outside the main dining hall, she said.

NPR: Carnival Cancels 12 More Cruises On Troubled Ship