Narrative:

In preparation to qualify for night passenger operations, I taxied out to runway 8 and arrived at the end of the displaced threshold. I then turned the aircraft to align with the centerline of runway 8. I slowly applied throttle and after only a few ft I noticed the aircraft nose dip and instantly the propeller struck the asphalt. I turned off the master switch and the 'P' lead switch and then discovered the 'johnston bar' was disengaged from its 'gear down' bracket.

Google
 

Original NASA ASRS Text

Title: PVT PLT OF A MOONEY M20F, MO21, FAILED TO ASSURE THAT THE LNDG GEAR OPERATING HANDLE WAS IN THE DOWN LOCKED POS DURING TKOF ROLL RESULTING IN THE NOSEWHEEL COLLAPSING AND THE PROP STRIKING THE RWY. THE ACFT'S ENG COWL AND PROP WERE DAMAGED AND THE ACFT STRANDED ON THE UNCTLED ARPT RWY.

Narrative: IN PREPARATION TO QUALIFY FOR NIGHT PAX OPS, I TAXIED OUT TO RWY 8 AND ARRIVED AT THE END OF THE DISPLACED THRESHOLD. I THEN TURNED THE ACFT TO ALIGN WITH THE CTRLINE OF RWY 8. I SLOWLY APPLIED THROTTLE AND AFTER ONLY A FEW FT I NOTICED THE ACFT NOSE DIP AND INSTANTLY THE PROP STRUCK THE ASPHALT. I TURNED OFF THE MASTER SWITCH AND THE 'P' LEAD SWITCH AND THEN DISCOVERED THE 'JOHNSTON BAR' WAS DISENGAGED FROM ITS 'GEAR DOWN' BRACKET.

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.