Having started this thread I guess I'm allowed to come back. First off, I'm not a journo: ex fixed wing pilot, now working in oil industry, non flying. My confusion was why extended consultation with the manufacturer would be required re an incident where an aircraft which, by all accounts was serviceable at the time, made an uncontrolled landing on water. I can understand any amount of discussion with crew, aircraft operator, or even (in light of informed debate here about same-family multi-typing which I was unaware of) the regulators. But why the manufacturer instead?