Narrative:

While taxiing the cessna 414, from the left seat and under supervision and instruction from the qualified rated pilot in the right seat, the brakes failed as the aircraft approached the parking area. I immediately advised the PIC who took control of the aircraft. There were no brakes on his side either, and he then shut down both engines by pulling the mixture levers to idle cutoff. We continued to apply brake pressure and attempted to turn the aircraft, but were not successful. It coasted into another parked aircraft causing minimal damage. This occurrence did not involve any 'intention of flight,' but was only a repositioning from one FBO to another. Since the failure was mechanical, I do not believe anything would have prevented the occurrence.

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Original NASA ASRS Text

Title: WHILE TAXIING THE CESSNA 414 FROM THE L SEAT AND UNDER THE SUPERVISION OF THE QUALIFIED PLT IN THE R SEAT, THE BRAKES FAILED AS THE ACFT APCHED THE PARKING AREA. THE QUALIFIED PLT TOOK CTL OF THE ACFT. THERE WERE NO BRAKES ON HIS SIDE OF THE ACFT EITHER. HE SHUT DOWN BOTH ENGS, ATTEMPTED A TURN, BUT WAS UNSUCCESSFUL IN AVOIDING COLLIDING WITH ANOTHER ACFT.

Narrative: WHILE TAXIING THE CESSNA 414, FROM THE L SEAT AND UNDER SUPERVISION AND INSTRUCTION FROM THE QUALIFIED RATED PLT IN THE R SEAT, THE BRAKES FAILED AS THE ACFT APCHED THE PARKING AREA. I IMMEDIATELY ADVISED THE PIC WHO TOOK CTL OF THE ACFT. THERE WERE NO BRAKES ON HIS SIDE EITHER, AND HE THEN SHUT DOWN BOTH ENGS BY PULLING THE MIXTURE LEVERS TO IDLE CUTOFF. WE CONTINUED TO APPLY BRAKE PRESSURE AND ATTEMPTED TO TURN THE ACFT, BUT WERE NOT SUCCESSFUL. IT COASTED INTO ANOTHER PARKED ACFT CAUSING MINIMAL DAMAGE. THIS OCCURRENCE DID NOT INVOLVE ANY 'INTENTION OF FLT,' BUT WAS ONLY A REPOSITIONING FROM ONE FBO TO ANOTHER. SINCE THE FAILURE WAS MECHANICAL, I DO NOT BELIEVE ANYTHING WOULD HAVE PREVENTED THE OCCURRENCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.