B737 TAIL STRIKE ON TKOF FROM BWI.

Narrative

DURING THE TAXI THE FO UPDATED THE DATA FOR ANTI-ICE ON TKOF. THE TRIM AND CTR OF GRAVITY WERE SET ACCORDING TO THE TKOF DATA AND WERE IN A NORMAL RANGE. IT WAS THE FO'S LEG. THE PWR WAS SET FOR A 22K REDUCED PWR; FLAPS 1 DEG TKOF. THE TKOF ROLL WAS NORMAL UP TO V1. AT VR THE FO STARTED TO PULL BACK ON THE YOKE AND THE NOSE OF THE ACFT ROTATED AT A FASTER RATE THAN NORMAL. IT FELT AS IF THE ACFT WAS OUT OF TRIM OR TAIL HVY. HE STOPPED THE ROTATION AT AN ATTITUDE THAT WAS A LITTLE HIGHER THAN NORMAL. THE ACFT THEN DEPARTED THE RWY. WE FELT NO VIBRATIONS OR HAD ANY INDICATIONS OF A TAIL STRIKE. WE CONTINUED ON WITH A NORMAL CLB PROFILE. AT 14000 FT THE FLT ATTENDANT IN THE REAR CALLED AND SAID THAT SHE AND THE OTHER FLT ATTENDANTS HAD HEARD A SCRAPING NOISE ON ROTATION PRIOR TO LIFTOFF. I TALKED TO BOTH FLT ATTENDANTS AND DECIDED THAT WE SHOULD DIVERT TO RDU TO CHK THE ACFT FOR A TAIL STRIKE. ONCE ON THE GND; I INSPECTED THE TAIL WITH MAINT AND WE FOUND THAT THE PAD ON THE BOTTOM ON THE TAIL SKID WAS MISSING. THE SKID HAD ALSO BEEN PUSHED UP ABOUT 1 INCH BUT WAS STILL SHOWING THE GREEN BAND. THERE WERE NO SCRAPE MARKS OR OTHER DAMAGE. THE FO SAID HE DID NOT REMEMBER IF THE PAD WAS THERE ON THE WALKAROUND OR IF THE SKID HAD BEEN PUSHED UP. THE ACFT WAS TAKEN OTS FOR INSPECTION.