Narrative:

My aircraft was cleared for takeoff and completed a normal departure. An small transport was noted on the opposite side of the runway we entered. As we were cleared for takeoff, the small transport was cleared to cross with the warning to avoid wake turbulence from our aircraft. On our arrival at destination we were notified that another of our aircraft had reported that the small transport had been blown into the mud. I think the small transport should have waited until our liftoff at least before crossing, or tower should have withheld clearance for some specified distance on our takeoff roll. Remaining jet blast is very hard to estimate at night and timed or distance separation before light aircraft cross is the only solution. The small transport pilot probably was in a hurry and did not feel anything until too late. Supplemental information from acn 253096: a widebody transport frtr was cleared for takeoff on runway 17L. I was subsequently cleared to cross runway 17L and taxi to the ramp. The widebody transport was sitting in position and was not rolling and I felt I could cross behind him and taxi to park. I pushed up the power to cross and about halfway across the widebody transport pushed up his power to begin his takeoff roll. His jet blast blew me off the runway into a grass area off the approach end of runway 17L. The propeller tips were damaged on the taxi lights and the left wing came in contact with the ground and was bent (damaged at the tip). I thought I would be able to get across before the widebody transport started his takeoff and was not aware that his jet blast would render an aircraft the size of mine so helpless.

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Original NASA ASRS Text

Title: SMT, TAXIING TFC, BLOWN OFF END OF ACTIVE RWY AS IT CROSSED BEHIND DEPARTING WDB. JET BLAST ENCOUNTER.

Narrative: MY ACFT WAS CLRED FOR TKOF AND COMPLETED A NORMAL DEP. AN SMT WAS NOTED ON THE OPPOSITE SIDE OF THE RWY WE ENTERED. AS WE WERE CLRED FOR TKOF, THE SMT WAS CLRED TO CROSS WITH THE WARNING TO AVOID WAKE TURB FROM OUR ACFT. ON OUR ARR AT DEST WE WERE NOTIFIED THAT ANOTHER OF OUR ACFT HAD RPTED THAT THE SMT HAD BEEN BLOWN INTO THE MUD. I THINK THE SMT SHOULD HAVE WAITED UNTIL OUR LIFTOFF AT LEAST BEFORE XING, OR TWR SHOULD HAVE WITHHELD CLRNC FOR SOME SPECIFIED DISTANCE ON OUR TKOF ROLL. REMAINING JET BLAST IS VERY HARD TO ESTIMATE AT NIGHT AND TIMED OR DISTANCE SEPARATION BEFORE LIGHT ACFT CROSS IS THE ONLY SOLUTION. THE SMT PLT PROBABLY WAS IN A HURRY AND DID NOT FEEL ANYTHING UNTIL TOO LATE. SUPPLEMENTAL INFORMATION FROM ACN 253096: A WDB FRTR WAS CLRED FOR TKOF ON RWY 17L. I WAS SUBSEQUENTLY CLRED TO CROSS RWY 17L AND TAXI TO THE RAMP. THE WDB WAS SITTING IN POS AND WAS NOT ROLLING AND I FELT I COULD CROSS BEHIND HIM AND TAXI TO PARK. I PUSHED UP THE PWR TO CROSS AND ABOUT HALFWAY ACROSS THE WDB PUSHED UP HIS PWR TO BEGIN HIS TKOF ROLL. HIS JET BLAST BLEW ME OFF THE RWY INTO A GRASS AREA OFF THE APCH END OF RWY 17L. THE PROP TIPS WERE DAMAGED ON THE TAXI LIGHTS AND THE L WING CAME IN CONTACT WITH THE GND AND WAS BENT (DAMAGED AT THE TIP). I THOUGHT I WOULD BE ABLE TO GET ACROSS BEFORE THE WDB STARTED HIS TKOF AND WAS NOT AWARE THAT HIS JET BLAST WOULD RENDER AN ACFT THE SIZE OF MINE SO HELPLESS.

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.