Herbert 23
@ wileydog3: of course it is possible that the APU was running.
Possible but not probable. And in all the departures (heavy or light) I did out of LGA we NEVER did an APU bleed. In fact, I NEVER flew a dept using APU bleed on the -320. The 737.. yes. -320.. no.
FYI, the runways at LGA is 7000ft. It is more than sufficient for max weight departures.