AN ACR B737; PARKED AND SHUT DOWN AWAITING A DEP RELEASE; WAS STRUCK; AND SUBSTANTIALLY DAMAGED BY ANOTHER ACR'S L1011. NO EVAC; BUT THE PAX HAD TO BE REMOVED AND THE ACFT TOWED AWAY.

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AT LGA ARPT; TAXIING OUT FOR TKOF TO CLE. TSTMS IN THE VICINITY OF LGA CAUSED MOST OF THE DEP GATES TO CLOSE CAUSING LENGTHY DELAYS FOR EVERYONE DEPARTING. WE WERE ON TXWY B WITH 2 NARROW BODY ACFT AHEAD OF US. GND WAS USING TXWY B TO TXWY F; CROSS RWY 4/22 AT TXWY F AND THEN OUT TO RWY 13 FOR DEP. THE W SIDE TFC WAS ALL ALLOWED TO SHUT DOWN ENGS. WHEN THE GND STOP OCCURRED THEY LET EVERYONE ELSE SHUT DOWN WHERE THEY WERE; ON THE E SIDE OF THE ARPT. AN ACR X MD80; ACR Y MD80 THEN US; A B737-300. THE ACR X ACFT WAS JUST OFF OF TXWY B ONTO TXWY F HOLDING SHORT OF RWY 4/22. THE ACR Y MD80 WAS ON TXWY B; AND WE WERE ON TXWY B BEHIND THE ACR Y MD80 WITH TXWY G IMMEDIATELY BEHIND US. WE WERE ALL ON OUR WAY OUT FOR TKOF WHEN THE WX DELAY OCCURRED. THERE WERE VFR DEPS; FOR LCL TFC AND A FEW JETS WERE DEPARTING EBOUND AND NBOUND. THESE ACFT HAD BEEN CLRED TO CROSS RWY 4/22 AT TXWY P FOR RWY 13. WE (B737-300) HAD BEEN SITTING WITH ENGS SHUT DOWN AND PARKING BRAKES SET FOR A LITTLE OVER 1 HR WHEN THE NOSE OF OUR ACFT SUDDENLY MOVED TO THE L OF CTRLINE; AND CAME TO A STOP APPROX 25 FT L OF CTRLINE TXWY B. AT FIRST; I THOUGHT WE HAD ENCOUNTERED SOMEONE'S JET BLAST BUT AS I LOOKED OUT MY R WINDOW; BEHIND US I COULD SEE AN ACR Z L1011 DIRECTLY BEHIND US. I ADVISED GND CTL (121.85 AT THE TIME) THAT WE HAD BEEN STRUCK FROM BEHIND. AT THAT POINT; ACR Z ADVISED OVER GND FREQ THAT THEY HAD INDEED COLLIDED WITH US. WE ADVISED GND CTL TO ROLL THE EMER EQUIP. WITH NO ONE COMPLAINING OF INJURIES AND AN ALL STABLE GIVEN FROM THE EMER GND CREWS; WE OPTED NOT TO EXECUTE AN EMER EVAC. WE NOTIFIED ALL INVOLVED THAT WE WOULD USE BUSSES AND A PORTABLE STAIRWAY. THIS ALLOWED US TO EXPEDITE OUR PAX BACK TO THE TERMINAL AND KEEP THEM FROM SITTING ON A HOT AIRPLANE OR EVEN WORSE; ALLOWING THEM OUT ONTO THE TXWY WITH NUMEROUS ACFT TAXIING AND TAKING OFF. AFTER EVERYONE HAD BEEN DEPLANED WE GOT A CHANCE TO INSPECT THE DAMAGE TO BOTH ACFT. THEY CAME TO A STOP; STILL IN CONTACT WITH ONE ANOTHER. THE ACR Z L1011 FOR SOME REASON TRIED TO MAKE IT PAST US ON TXWY G INSTEAD OF TXWY P GOING TO RWY 13. THE L1011'S L WING WITH LED'S OUT RAN INTO OUR R ELEVATOR; SLICING THROUGH IT AND COMING TO A REST IN THE STABILIZER. WE WERE NOT AWARE OF ACR Z'S TAXI INSTRUCTIONS AT THE TIME. THE WX AT LGA AT THE TIME OF THE EVENT WAS RPTED AS VMC; DAYLIGHT; WIND 2009; VISIBILITY 10 SM; 50 SCATTERED CUMULUS; 100 SCATTERED; 250 SCATTERED; RWY 31C; ALTIMETER 29.68. SUPPLEMENTAL INFO FROM ACN 374872: WE WERE SHUT DOWN FOR APPROX 1 HR AT WHICH POINT WE WERE GIVEN A DIFFERENT DEP RTE TO ATL AFTER COORDINATING WITH FLT CTL. WE STARTED #1 AND #2 ENGS; AND ADVISED GND CTL; THEN CLRED TO EXIT TXWY B; TURN R ONTO TXWY A; STARTED #3 ENG; PROCEEDED TO TXWY G TO HOLD SHORT OF RWY 22. THIS CLRNC WAS AMENDED TO CROSS RWY 22 TO HOLD SHORT OF RWY 13. UPON XING THE INTXN OF TXWY G AND TXWY B; ANOTHER ACR'S B737 WAS STOPPED TO OUR L ON TXWY B AS WAS ANOTHER ACFT BEHIND IT TO OUR R; BOTH WITH ENGS SHUT DOWN. WE WERE ON THE CTRLINE COMING ONTO TXWY G WHICH IS SOMEWHAT NARROW AT THIS POINT. WE MADE A R TURN AT MINIMAL SPD TO STAY AS FAR R OF THE OTHER ACR'S B737 AS POSSIBLE. UPON PROCEEDING ACROSS TXWY B; A 30-40 DEG L TURN IS NECESSARY TO STAY ON THE CTRLINE. I ASKED MY SO TO LEAVE HIS STATION TO LOOK OUT THE OBSERVER WINDOW TO ASSURE CLRNC ON THE L SIDE. AS WE ROLLED BACK TO THE CTRLINE I FELT A SLIGHT IMPACT AND THOUGHT WE HAD HIT A TXWY LIGHT AND STOPPED IMMEDIATELY. WITHIN A FEW SECONDS WE HEARD THE OTHER ACR SAY THEY HAD BEEN HIT. WE DETERMINED LATER THAT OUR L WINGTIP CAME INTO CONTACT WITH THE R HORIZ STABILIZER OF THE OTHER ACR'S B737. FLT ATTENDANTS AND PAX WERE ADVISED OF THE SIT. TWR ADVISED TO PWR DOWN AS MUCH AS POSSIBLE AND WE SHUT DOWN ALL ENGS. BECAUSE OF WX; THE DEPLANING PROCESS WAS DELAYED FOR APPROX 2 HRS AFTER THE INCIDENT. WE PROCEEDED TO COMPLETE THE SHUTDOWN CHKLISTS TO THE EXTENT POSSIBLE AND DEPARTED THE ACFT AT APPROX XE30 LCL TIME.