Listenting to one of the ATC planning telcons at work today I heard that an AA international arrival into JFK was unable to shoot an ILS or a GPS approach due to some instrument problems on the airplane. The plane was then forced to divert to EWR and shoot a VOR approach to 11 which backed EWR up even worse than it already was to allow for this. A couple of questions I have on this?
One, if you can't shoot an ILS approach for some reason, wouldn't this also affect a VOR approach since you are relying on the same NAV radio, unless you can use the FMS to shoot the approach without the VOR?
Secondly, why couldn't they shoot a VOR somewhere to JFK? I am not privy to all the approaches there, but I do know there are some VOR approaches there? Why back up EWR as well?
Thirdly, which flight was it and where was it coming from?