CC-18-180 LEFT BRAKE FAILURE WAS DISCOVERED ON LNDG ROLLOUT; AND ACFT EXITED RWY. NO DAMAGE WAS SUSTAINED TO ACFT OR RWY LIGHTING.

Narrative

EVERYTHING APPEARED NORMAL DURING PREFLT; TAXI; AND TKOF. BRAKES WORKED NORMALLY DURING INITIAL TAXI BRAKE CHK AND THROUGHOUT TAXI. AFTER A WATER LNDG; EVERYTHING CONTINUED TO APPEAR NORMAL DURING ANOTHER PREFLT PRIOR TO WATER TKOF AND RETURN. ON LNDG RWY 35R; I APPLIED THE BRAKES AFTER TOUCHING DOWN APPROX 700 FT DOWN THE RWY. THE L BRAKE PEDAL WENT TO THE FLOOR AND HAD NO PRESSURE. AT THIS POINT; I CALLED 'NO L BRAKE CHK YOURS.' MY BACK SEAT PAX PUSHED ON HIS; WITH THE SAME RESULT. AT THIS POINT I CALLED TWR AND LET THEM KNOW WE HAD NO L BRAKE AND WE WOULD NEED A TUG. WE ROLLED OUT DOWN THE RWY AND I USED THE AIR RUDDER IN ORDER TO MAINTAIN DIRECTIONAL CTL. THROTTLE WAS AT IDLE AND I TAPPED THE R BRAKE IN ORDER TO SLOW US DOWN; MAINTAINING THE CTRLINE WITH THE RUDDER. AT APPROX TAXI SPD; THE AIR RUDDER CEASED TO BE EFFECTIVE. I TRIED ADDING A BIT OF PWR FOR A QUICK MOMENT TO MAKE THE AIR RUDDER EFFECTIVE; BUT THIS WAS NOT VERY EFFECTIVE AND ONLY ADDED SPD. AT THIS POINT I DECIDED THAT I MAY HAVE TO EXIT THE RWY IN ORDER TO STOP THE ACFT; DUE TO THE FACT THAT WE DID NOT HAVE ENOUGH RWY TO STOP THE ACFT ROLLING; AND EXITING ON THE END OF THE RWY WOULD HAVE INVOLVED STRIKING A RWY LIGHT. I TAPPED THE R BRAKE TO FURTHER SLOW THE ACFT DOWN; APCHING THE EDGE OF THE RWY. I PICKED A SPOT BTWN 2 RWY LIGHTS AND AS THE ACFT SLOWED TO A WALKING PACE AT THE EDGE OF THE RWY; I APPLIED FULL R BRAKE IN ORDER TO USE THE GRASS AND THE BRAKE TO BRING THE ACFT TO A STOP. THIS RESULTED IN A 180 DEG TURN AT THE EDGE OF THE RWY; BRINGING THE ACFT TO A STOP APPROX 300 FT FROM THE DEP END OF THE RWY. I DO NOT BELIEVE THERE WAS ANY WAY OF KEEPING THE ACFT ON THE RWY WITHOUT DAMAGING A RWY LIGHT AT THE END OR THE ACFT ITSELF. ALSO CONTRIBUTING WAS A LIGHT WIND FROM THE E WHICH CONTRIBUTED TO WEATHERVANING TO THE R. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT NEITHER THE ACFT NOR ANY ARPT GND EQUIPMENT SUFFERED ANY DAMAGE. GND STEERING IS ACCOMPLISHED USING WHEEL BRAKES ONLY.