Regarding to FR24 UTC times and LiveATC feed times, they don't fix... You know if this could be possible??
You can hear the flight checking on with EWR approach at 26:00 on the 1830Z archive. However there seems to be a glitch with the archives as EWR Approach, EWR Tower, EWR departure, JFK approach (ROBER) as all are missing about 15 minutes of recording time in each of their 1900Z archive's.
From the time the aircraft is cleared to 4000 feet on the approach into EWR untill well into the missed approach did not get recorded, as well as some transmissions on JFK approach (ROBER) enroute to JFK. Full coverage is avialable on the JFK final and Tower archives, but the missed approach at JFK is missed again when it was blocked by the other Tower frequency.
From what is available there is nothing particulary remarkable.
DAL271 did not come in on ROBER. Check the NY Approach CAMRN feed. You can hear them talking to DAL271 almost right away (http://archive-server.liveatc.net/kjfk/KJFK-NY-App-CAMRN-Apr-22-2015-1900Z.mp3). I think they got handed off to ROBER after...
I'm at work so I can't edit anything. Apologies for pasting links.