Airbus announced it as an MoU, but Norwegian announced it as firm. So perhaps Norwegian considers it firm, but has not yet signed the formal sales contract with Airbus which would make it so in Airbus' eyes (and formal accounting rules).
We have a similar situation with AF/KL. They have signed the sales contract for the 787, but have not signed it for the A350. So Boeing lists the 787 planes as firm, and Airbus considers the A350 planes as MoUs.
scouseflyer From United Kingdom, joined Apr 2006, 3255 posts, RR: 10 Reply 23, posted (1 year 3 months 2 weeks 4 days 8 hours ago) and read 50294 times:
Interesting that we've seen a few orders this year where a carrier has ordered both the A320 and the 737, I wonder if this is a symptom of the scarity of slots for both "old engine option" versions of these birds so airlines can't get all they want from one OEM.
Asiaflyer From Singapore, joined May 2007, 1019 posts, RR: 1 Reply 24, posted (1 year 3 months 2 weeks 4 days 6 hours ago) and read 50101 times:
Quoting Daysleeper (Reply 22): Also, unless I am missing something the link you provided says they have ordered:
20 Boeing 737-800NGs
10 Boeing 777-300 ERs
21 Airbus 330-200s
25 narrow-body planes
18 sub-100 seat jets
The first 6 A332 was ordered in July 2010 and the 10 77W + 10 738s was also from an earlier order.