PLT OF AN SMA SEL TRAINING ACFT INADVERTENTLY TAXIED ONTO A CLOSED RWY UNDER CONSTRUCTION RESULTING IN STRIKING THE PROP ON THE TORN UP RWY DEBRIS.

Narrative

AROUND XA30 PM I TAXIED IN AN SMA SEL FROM THE MAIN TERMINAL AT MOJAVE ARPT. THE NON FEDERAL TWR GAVE US WIND DIRECTION AND SPD. MY INTENTION WAS TO TAXI TO RWY 25 FOR TKOF. IT WAS DARK AND I DID NOT SEE THE INTXN TO RWY 25. I PROCEEDED ON THE PARALLEL TXWY TO RWY 30 WHICH WAS COMPLETELY LIT. I GOT ON RWY 30 TO BACK TAXI TO RWY 25 FOR TKOF. I FELT THE GND TO BECOME SOFT. I DID A 180 DEG TURN ON THE RWY. AT THIS TIME; THE PROP STRUCK THE CONCRETE PORTION WHICH HAD NOT BEEN REMOVED FOR RESURFACING OF THE RWY 30. I SHUT THE ENG DOWN AND CALLED THE NON FEDERAL TWR TO CALL SECURITY AND HELP US TOW THE ACFT OFF THE RWY. TWR SAID ON FREQ 'I FORGOT TO TELL YOU THAT RWY 30 IS CLOSED.' THE ARPT'S MAINT SUPVR SAID THAT HE FORGOT TO TURN THE LIGHTS OFF FROM RWY 30. THERE WERE NO BARRICADES BLOCKING RWY 30. THE RWY LIGHTS WERE ON. I DID NOT SEE AN 'X' ON THE RWY. THE NON FEDERAL TWR DID NOT FOLLOW ME VISUALLY TO REALIZE THAT I WAS GETTING ON A RWY THAT WAS CLOSED. RWY 30/12 WAS CLOSED BY NOTAM BUT NOT BARRICADED. THE INTENT WAS TO USE IT FOR TAXI OP ONLY.