Narrative:

Flight operated on schedule tpa-lga. I was flying a normal visibility approach backed up with ILS to runway 4 at lga. During the flare, lga tower announced 'cancel takeoff clearance.' at approximately 100 KTS during the landing roll, a commuter light transport, aircraft Y, was observed crossing left to right on runway 13. The light transport came to a stop at the intersection of runways 13 and 4. When it became apparent the light transport was not going to clear the intersection I applied maximum braking and maximum reverse, stopping our flight, aircraft X, 20'-30' from the midsection of the light transport. Conclusions: the tower at lga gave the light transport takeoff clearance west/O proper sep between landing and departing aircraft or the light transport delayed its takeoff, jeopardizing the ATC guidlines for traffic sep. The tower at lga should have requested the light transport to hold short of the intersection of runway 4. The light transport should have been aware of the landing traffic for runway 4 and held short of the intersection. Had the landing speed been higher or the T/D not at the 1000' mark both aircraft may have been lost. Supplemental information from acn 155315. I was working at the lga ATCT as a local controller. Air carrier Y was in position on runway 13 (intersecting runway) waiting for departure. Air carrier X, an medium large transport, was on final approach for runway 04. Air carrier X landed on runway 04 and was rapidly decelerating to turn off at an anticipated turnoff point prior to the runway intersection. Air carrier Y was cleared for takeoff on runway 13. Air carrier X appeared to miss the anticipated turnoff and was slowly rolling toward the runway intersection. At this point I cancelled the takeoff clearance for air carrier Y. Air carrier Y acknowledged the cancelled clearance but rolled through the intersection. Air carrier X subsequently filed either a near miss or a runway incursion report.

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Original NASA ASRS Text

Title: TWR CTLR AT LGA HAD APPARENTLY CLEARED A COMMUTER TURBOPROP FOR TKOF ON RWY 13 WHILE ACR MLG WAS LNDG RWY 4. CTLR INSTRUCTED COMMUTER TO ABORT TKOF BUT IT ROLLED INTO RWY INTERSECTION WHERE MLG CAME TO WITHIN 30' BEFORE IT STOPPED.

Narrative: FLT OPERATED ON SCHEDULE TPA-LGA. I WAS FLYING A NORMAL VIS APCH BACKED UP WITH ILS TO RWY 4 AT LGA. DURING THE FLARE, LGA TWR ANNOUNCED 'CANCEL TKOF CLRNC.' AT APPROX 100 KTS DURING THE LNDG ROLL, A COMMUTER LTT, ACFT Y, WAS OBSERVED XING L TO R ON RWY 13. THE LTT CAME TO A STOP AT THE INTXN OF RWYS 13 AND 4. WHEN IT BECAME APPARENT THE LTT WAS NOT GOING TO CLR THE INTXN I APPLIED MAX BRAKING AND MAX REVERSE, STOPPING OUR FLT, ACFT X, 20'-30' FROM THE MIDSECTION OF THE LTT. CONCLUSIONS: THE TWR AT LGA GAVE THE LTT TKOF CLRNC W/O PROPER SEP BTWN LNDG AND DEPARTING ACFT OR THE LTT DELAYED ITS TKOF, JEOPARDIZING THE ATC GUIDLINES FOR TFC SEP. THE TWR AT LGA SHOULD HAVE REQUESTED THE LTT TO HOLD SHORT OF THE INTXN OF RWY 4. THE LTT SHOULD HAVE BEEN AWARE OF THE LNDG TFC FOR RWY 4 AND HELD SHORT OF THE INTXN. HAD THE LNDG SPD BEEN HIGHER OR THE T/D NOT AT THE 1000' MARK BOTH ACFT MAY HAVE BEEN LOST. SUPPLEMENTAL INFO FROM ACN 155315. I WAS WORKING AT THE LGA ATCT AS A LCL CTLR. ACR Y WAS IN POS ON RWY 13 (INTERSECTING RWY) WAITING FOR DEP. ACR X, AN MLG, WAS ON FINAL APCH FOR RWY 04. ACR X LANDED ON RWY 04 AND WAS RAPIDLY DECELERATING TO TURN OFF AT AN ANTICIPATED TURNOFF POINT PRIOR TO THE RWY INTXN. ACR Y WAS CLRED FOR TKOF ON RWY 13. ACR X APPEARED TO MISS THE ANTICIPATED TURNOFF AND WAS SLOWLY ROLLING TOWARD THE RWY INTXN. AT THIS POINT I CANCELLED THE TKOF CLRNC FOR ACR Y. ACR Y ACKNOWLEDGED THE CANCELLED CLRNC BUT ROLLED THROUGH THE INTXN. ACR X SUBSEQUENTLY FILED EITHER A NEAR MISS OR A RWY INCURSION RPT.

Data retrieved from NASA's ASRS site as of July 2007 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.