Virgin Atlantic : We have no evidence that both pilots were asleep simultaneously . Comment: The 737 landed safely in Amsterdam as scheduled . Report : The incident was `` due to longer duty period with insufficient opportunity to sleep '' Some countries allow one pilot at a time to sleep in the cockpit , under certain circumstances .
Virgin Atlantic : We have no evidence that both pilots were asleep simultaneously . Comment: Report : The incident was `` due to longer duty period with insufficient opportunity to sleep '' Some countries allow one pilot at a time to sleep in the cockpit , under certain circumstances .