Narrative:

Lga was alternating intersecting departures and arrs on runway 4 and runway 31 respectively. After holding in position for several mins; we were given an immediate takeoff clearance and started our takeoff roll within 6-8 seconds (normal engine spool-up time). At approximately 90-100 KTS; I heard the tower give a landing heavy jet go around instructions. I overhead the heavy acknowledge the go around; so I continued my takeoff. I observed the heavy approaching the intersecting runways approximately 200-250 ft above me. Had I not heard the heavy acknowledge the go around I would have aborted. It's my belief that the control tower; if not barely; averted an operational error.

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Original NASA ASRS Text

Title: B757 DEP FROM LGA EXPERIENCED CONFLICT DURING INTERSECTING RWY OPS OBSERVING ARR ACFT EXECUTING GAR.

Narrative: LGA WAS ALTERNATING INTERSECTING DEPS AND ARRS ON RWY 4 AND RWY 31 RESPECTIVELY. AFTER HOLDING IN POS FOR SEVERAL MINS; WE WERE GIVEN AN IMMEDIATE TKOF CLRNC AND STARTED OUR TKOF ROLL WITHIN 6-8 SECONDS (NORMAL ENG SPOOL-UP TIME). AT APPROX 90-100 KTS; I HEARD THE TWR GIVE A LNDG HVY JET GAR INSTRUCTIONS. I OVERHEAD THE HVY ACKNOWLEDGE THE GAR; SO I CONTINUED MY TKOF. I OBSERVED THE HVY APCHING THE INTERSECTING RWYS APPROX 200-250 FT ABOVE ME. HAD I NOT HEARD THE HVY ACKNOWLEDGE THE GAR I WOULD HAVE ABORTED. IT'S MY BELIEF THAT THE CTL TWR; IF NOT BARELY; AVERTED AN OPERROR.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.