Apparently Israir cancelled its Business class for this week on flights to NY.
The regular 763 is not available so one was leased this week from NEOS. The NEOS configuration does not have Business Class seats.

Here is how I learnt about it .... I posted this onanother thread

I got my mother a ticket JFK - TLV - JFK with Israir in business because LY was not available the date she wanted to fly. The inbound flight was uneventful. She was suppose to fly back this Saturday night. I called them yesterday to reconfirm and assign her a seat. The agent on the phone from Israir Reservation told me she was downgraded to Economy because they had to change the a/c on the route this week to a NEOS 763, and that a/c does not have business!!!!
He really didnt have any more info. After many minutes of being put on hold and i was told to contact Israir NY.
To make a long story short ... I spoke to an Israir agent in NY who told me they were just going to call me and notify that my mother has a few options. This was at 18:45 thursday evening.
1. To get her money back on that segment - $1200
2. To get the difference back, fly on her original Israir flight but in economy (or rather charter version economy) and then get a free round trip ticket in economy to TLV in the future as compensation.
3. To fly with a "European" airline with a stop in Europe in C class and also get a free roundtrip in the future. Malev, Aerosvit or CSA ONLY !!!!
Non of these option were acceptable. Since it was already last minute i would not be able to find a reasonable priced ticket in C Class to NY so the first option was not acceptable.
She was only interested in flying Business (and definetly not in Israir's economy) so the second wasnt either. I wasnt going to let her fly in one of those "european" airlines with a 3 hour layover so that option was not acceptable either. If they would have offered more reliable airlines. even Iberia or Alitalia it would have been fine. BUT Aerosvit and Malev ???!!!???
This kinda of thing would have never happened on LY. They have the frequency and timetable to offer much better options. I am sure they would have even offered to put her on BA, LX etc Business if they had no other option. Also the way we were treated (No one called us, I accidently found out when i called to assign her a seat).
Though the younger agent I spoke to on the phone in NY was nice, non of the agent had the professionalism and experience that you feel when you speak to LY's resevation system. No one really knew anything here in Israir's Israel office, and i was ent from agent to agent.
After speaking for hours with one of the managers of Israir in NY (he claimed CSA was owned by lufthansa and that both Malev and CSA have a better business class than Israir) i was finally able to convince him that it would be in their best interest to give her a better flight. She didnt even want the compensation on the roundtrip ticket in eceonomy for the future. He ended up putting her on a LY flight, but without issuing a compensation ticket. That's fine she didnt really need it - though it would have been nice after what we went through.
I am sure it would have been treated much much better on LY!!!! You cannot yet compare Israir to LY, even if they operate the same a/c on the route.