ON LNDG ROLL BRAKE LOCKED; TIRE BLEW; ACFT CTL LOST; LEFT RWY AND HIT VASI LIGHTS.

Narrative

UPON TOUCHDOWN ON RWY 17 AT AURORA STATE; BRAKES WERE APPLIED. SHORTLY FOLLOWING BRAKE APPLICATION; A POP WAS HEARD. THE R MAIN LNDG GEAR TIRE HAD BLOWN OUT. THE ACFT IS AN L29 DELFIN; A CZECHOSLOVAKIAN JET TRAINER TYPE. NOSEWHEEL STEERING IS ACCOMPLISHED BY USING DIFFERENTIAL BRAKING AND THIS TYPE ACFT USES PNEUMATIC BRAKES. WITH A TIRE BLOW OUT; VIRTUALLY ALL ABILITY TO STEER THE ACFT IS LOST; EVEN THOUGH I STILL RETAINED BRAKING AUTH OVER THE L MAIN LNDG GEAR BRAKE. AS A RESULT OF THE ABOVE THE ACFT EXITED THE RWY TO THE R BTWN RWY LIGHTS; NONE WERE BROKEN; AND CONTINUED TOWARD THE S END OF THE RWY ALONG THE RWY MARGIN. UNABLE TO CTL DIRECTIONALLY WE WERE ALONG FOR THE RIDE. A VASI ARRAY WAS HIT DESTROYING IT COMPLETELY. THE ACFT WAS ROLLING ALONG AT APPROX 10-15 MPH WHEN THE VASI STRIKE OCCURRED. THE IMPACT WAS SLIGHT BUT THE ACFT CAME TO A STOP AFTER SWINGING AROUND TO THE R 180 DEGS. PART OF THE VASI SYS WAS STUCK UNDER THE R WING JAMMED IN THE GEAR WELL. APART FROM THE VASI LIGHTING BEING DESTROYED THERE WAS ALMOST NO DAMAGE TO THE L29 ACFT APART FROM A FEW SCRAPES AND SCRATCHES TO THE PAINT. THERE WAS NO INJURY INVOLVED WHATSOEVER. THE ACFT WAS INSPECTED AND OTHER THAN A BLOWN TIRE THERE WAS NO STRUCTURAL OR SYS DAMAGE NOTED. THE OREGON DEPT OF TRANSPORTATION SENT OUT AN INSPECTOR WHO TOOK PICTURES AND ASKED A FEW QUESTIONS. ALSO THE FAA WAS NOTIFIED VIA THE GADO OFFICE IN HILLSBOROUGH; OR; AND A BRIEF NARRATIVE WAS GIVEN TO THEM. THEY INDICATED THAT THEY WERE NOT SURE IF THIS WAS EVEN AN INCIDENT BUT WOULD BE REFERRED TO APPROPRIATE AUTH FOR FURTHER REVIEW. I BELIEVE THE CAUSE MAY HAVE BEEN A FAULTY R HAND MAIN LNDG GEAR BRAKE; GRABBING AND THEN NOT RELEASING AFTER THE FIRST BRAKE APPLICATION. LIGHT ON ITS WHEEL FROM FLAPS EXTENDED ALSO CONTRIBUTED TO THE BRAKE LOCK-UP.