Narrative:

During powerback from gate in memphis, right main landing gear rolled backwards off end of tarmac. Captain followed marshaller's instruction. No excessive speed or EPR during powerback. No sense of urgency from marshaller to stop or come forward. Very short distance from gate to end of taxiway. Powerback should not be allowed from this gate. I believe marshaller should have signaled us to come forward sooner. We were allowed to roll back entirely too far. There was 20 ft of asphalt after edge of taxiway, and we were allowed to cover that distance before departing prepared surface. There was no lag in captain following marshaller's instructions to come forward.

Google
 

Original NASA ASRS Text

Title: ACR LGT WAS POWERING BACK FROM THE GATE WITH A MARSHALLER GIVING GUIDANCE. FAILED TO GIVE STOP SIGNAL IN TIME TO PREVENT THE ACFT FROM MOVING OFF THE RAMP INTO GRASS AND MUD.

Narrative: DURING POWERBACK FROM GATE IN MEMPHIS, R MAIN LNDG GEAR ROLLED BACKWARDS OFF END OF TARMAC. CAPT FOLLOWED MARSHALLER'S INSTRUCTION. NO EXCESSIVE SPD OR EPR DURING POWERBACK. NO SENSE OF URGENCY FROM MARSHALLER TO STOP OR COME FORWARD. VERY SHORT DISTANCE FROM GATE TO END OF TXWY. POWERBACK SHOULD NOT BE ALLOWED FROM THIS GATE. I BELIEVE MARSHALLER SHOULD HAVE SIGNALED US TO COME FORWARD SOONER. WE WERE ALLOWED TO ROLL BACK ENTIRELY TOO FAR. THERE WAS 20 FT OF ASPHALT AFTER EDGE OF TXWY, AND WE WERE ALLOWED TO COVER THAT DISTANCE BEFORE DEPARTING PREPARED SURFACE. THERE WAS NO LAG IN CAPT FOLLOWING MARSHALLER'S INSTRUCTIONS TO COME FORWARD.

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.