Narrative:

The aircraft was loaded with cargo on 2 pallets with an approximately total weight of 2600 pounds. The cargo was secured using an approved net and tied down with straps. Engine start, taxi and pretkof checks were all normal. Upon commencement of the takeoff roll, an uncommanded rotation of the aircraft took place, raising the nose. The pilot in the left seat immediately pulled the power lever to idle. The tail tie-down struck the pavement and bounced several times. I said 'my aircraft' and took command. I then advised the tower that we had experienced a cargo shift. I applied the brakes gently while adding power and forward pressure on the control yoke. This brought the tail off the pavement and allowed us to taxi clear of the runway. We were cleared to repos the aircraft back to the loading ramp for inspection. I believe the partial collapse of a pallet constructed of substandard wood created space under the cargo net allowing the shift of cargo. I also believe a contributing factor was my own lack of knowledge of proper loading, securing and inspection of cargo methods. While I seek more education in this area, I believe that there is a general lack of knowledge in these areas among pilots. Supplemental information from acn 606969: we taxied back to ramp. Mechanics inspected aircraft and determined there was no structural damage. Aircraft was within weight and balance limits prior to taxi.

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Original NASA ASRS Text

Title: C208 FLT CREW ABORTS TKOF DUE TO CARGO SHIFT.

Narrative: THE ACFT WAS LOADED WITH CARGO ON 2 PALLETS WITH AN APPROX TOTAL WT OF 2600 LBS. THE CARGO WAS SECURED USING AN APPROVED NET AND TIED DOWN WITH STRAPS. ENG START, TAXI AND PRETKOF CHKS WERE ALL NORMAL. UPON COMMENCEMENT OF THE TKOF ROLL, AN UNCOMMANDED ROTATION OF THE ACFT TOOK PLACE, RAISING THE NOSE. THE PLT IN THE L SEAT IMMEDIATELY PULLED THE PWR LEVER TO IDLE. THE TAIL TIE-DOWN STRUCK THE PAVEMENT AND BOUNCED SEVERAL TIMES. I SAID 'MY ACFT' AND TOOK COMMAND. I THEN ADVISED THE TWR THAT WE HAD EXPERIENCED A CARGO SHIFT. I APPLIED THE BRAKES GENTLY WHILE ADDING PWR AND FORWARD PRESSURE ON THE CTL YOKE. THIS BROUGHT THE TAIL OFF THE PAVEMENT AND ALLOWED US TO TAXI CLR OF THE RWY. WE WERE CLRED TO REPOS THE ACFT BACK TO THE LOADING RAMP FOR INSPECTION. I BELIEVE THE PARTIAL COLLAPSE OF A PALLET CONSTRUCTED OF SUBSTANDARD WOOD CREATED SPACE UNDER THE CARGO NET ALLOWING THE SHIFT OF CARGO. I ALSO BELIEVE A CONTRIBUTING FACTOR WAS MY OWN LACK OF KNOWLEDGE OF PROPER LOADING, SECURING AND INSPECTION OF CARGO METHODS. WHILE I SEEK MORE EDUCATION IN THIS AREA, I BELIEVE THAT THERE IS A GENERAL LACK OF KNOWLEDGE IN THESE AREAS AMONG PLTS. SUPPLEMENTAL INFO FROM ACN 606969: WE TAXIED BACK TO RAMP. MECHS INSPECTED ACFT AND DETERMINED THERE WAS NO STRUCTURAL DAMAGE. ACFT WAS WITHIN WT AND BAL LIMITS PRIOR TO TAXI.

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.