Seems to be a lot of assumptions that the aircrew knew that they had released a 14kg PB. You would have thought if that was the case (switch pigs during a SAP?) they would know where it landed. As I see it they knew that it was there when they took off and that it was missing when they landed 90 minutes later - from this my guess is it just fell off, probably whilst manoeuvering (sp?). The crew cannot be held to account for this. Perhaps the crutching mechanism on the CBLS was worn. Who knows.