During a training atx taxi, the right main brake fails causing minor damage to 1 of the propellers.

Attributes
ACN	290932
Time
Date	199412
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : nv26
State Reference	NV
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 135
Flight Phase	ground other : taxi
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	instruction : trainee
Qualification	pilot : atp pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 2 flight time total : 4200 flight time type : 44
ASRS Report	290932
Person 2
Affiliation	company : air taxi
Function	instruction : instructor
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While taxiing out for a training flight we experienced a failure in the right brake, the brakes had been checked prior to taxi. The failure caused the aircraft to veer off to the left of the runway. The instructor shut off both engines and the aircraft came to a stop prior to going over a berm. Maintenance confirmed it was a brake failure. Some damage was caused to a propeller, a ding, which was filed out by maintenance this incident illustrates the importance of taxiing at all times as though a brake failure. Any more speed and the aircraft may have gone over the berm causing substantial damage to the aircraft.

Original NASA ASRS Text

Title: DURING A TRAINING ATX TAXI, THE R MAIN BRAKE FAILS CAUSING MINOR DAMAGE TO 1 OF THE PROPS.

Narrative: WHILE TAXIING OUT FOR A TRAINING FLT WE EXPERIENCED A FAILURE IN THE R BRAKE, THE BRAKES HAD BEEN CHKED PRIOR TO TAXI. THE FAILURE CAUSED THE ACFT TO VEER OFF TO THE L OF THE RWY. THE INSTRUCTOR SHUT OFF BOTH ENGS AND THE ACFT CAME TO A STOP PRIOR TO GOING OVER A BERM. MAINT CONFIRMED IT WAS A BRAKE FAILURE. SOME DAMAGE WAS CAUSED TO A PROP, A DING, WHICH WAS FILED OUT BY MAINT THIS INCIDENT ILLUSTRATES THE IMPORTANCE OF TAXIING AT ALL TIMES AS THOUGH A BRAKE FAILURE. ANY MORE SPD AND THE ACFT MAY HAVE GONE OVER THE BERM CAUSING SUBSTANTIAL DAMAGE TO THE ACFT.

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.