ON TKOF THE PAX DOOR 'POPPED' OPEN AND DURING THE ENSURING ABORT LEFT THE RWY AND STRUCK SOME ARPT EQUIP.

Narrative

AT THE START OF A VFR DEP FOR AN IFR FLT FROM I69 TO ORF IN A A36 BONANZA THE TKOF ROLL WAS UNEVENTFUL UNTIL ROTATION; WHEN THE R FRONT DOOR POPPED OPEN. I FELT WE WERE ESSENTIALLY STILL ON THE GND AND SHUT THE THROTTLE TO ABORT THE TKOF. AS I DID THIS THE ACFT CROSSED THE MIDPOINT OF THE FIELD AND IT BECAME CLR THAT THE REMAINING RWY WAS TOO SHORT TO ALLOW STOPPING ON THE RWY; ALTHOUGH I FELT WE WERE COMMITTED TO TRYING TO STOP RATHER THAN FLY AT THAT TIME. THE ACFT LEFT THE R SIDE OF THE RWY NEAR THE END OF THE RWY; STRUCK 1 OF THE LIGHT BOXES OF THE PRECISION APCH PATH INDICATOR (PAPI) SYS AND EVENTUALLY STOPPED BEYOND THE END OF THE RWY. I RESTARTED THE ENG; TAXIED BACK TO THE ARR END OF THE RWY; AND DID A THOROUGH PREFLT INSPECTION AGAIN; WITH PARTICULAR ATTN TO THE GEAR. FINDING NO DAMAGE; I TOOK OFF FOR AN UNEVENTFUL FLT TO ORF. SUBSEQUENT INSPECTION BY MECHS SHOWED THAT THE GEAR CYCLED NORMALLY WITH PROPER ALIGNMENT. THE TIRE; WHICH WAS SPLIT TO THE CORDING; AND THE OUTBOARD HALF OF THE R MAIN WHEEL; WHICH WAS GOUGED ABOUT 1/4 INCH; WERE REPLACED. THE PAPI BOX WILL BE REPAIRED OR REPLACED AND REINSTALLED AT MY EXPENSE. THERE WERE NO INJURIES ARISING FROM THIS INCIDENT. THIS EVENT SHOWS THE VALUE OF CLOSELY CHKING ALL DOORS PRIOR TO TKOF; EVEN WHEN THE OCCUPANT OF THE R SEAT IS A CFI. IT SHOWS HOW THE GO-NO GO DECISION FOR A DOOR OPENING SHOULD BE MODIFIED ON A SHORTER RWY (3705 FT) THAN ONE IS ACCUSTOMED TO USING (9000 FT).