Beech baron 55 flight crew has brake failure during taxi and departs taxiway.

Attributes
ACN	563363
Time
Date	200210
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : apa.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Baron 55/Cochise
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 25 flight time total : 700 flight time type : 150
ASRS Report	563363
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	aircraft equipment problem : less severe conflict : ground less severe excursion : taxiway other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : unable
Consequence	faa : reviewed incident with flight crew other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

We were doing full stop lndgs with taxi backs when the event occurred. We were taxiing to runway 17L at apa via taxiway a between taxiway A2 and taxiway A1. I told the pilot to slow the aircraft down as I had no brake pedals on my side -- there is no way to stop the aircraft. The aircraft began to veer to the left. I applied full right rudder and simultaneously brought up the left throttle and told the pilot to stop braking. The pilot said the right brake was unresponsive. We were quickly off the taxiway and I brought both mixtures to idle, but the left propeller struck a taxiway light damaging the propeller tips.

Original NASA ASRS Text

Title: BEECH BARON 55 FLC HAS BRAKE FAILURE DURING TAXI AND DEPARTS TXWY.

Narrative: WE WERE DOING FULL STOP LNDGS WITH TAXI BACKS WHEN THE EVENT OCCURRED. WE WERE TAXIING TO RWY 17L AT APA VIA TXWY A BTWN TXWY A2 AND TXWY A1. I TOLD THE PLT TO SLOW THE ACFT DOWN AS I HAD NO BRAKE PEDALS ON MY SIDE -- THERE IS NO WAY TO STOP THE ACFT. THE ACFT BEGAN TO VEER TO THE L. I APPLIED FULL R RUDDER AND SIMULTANEOUSLY BROUGHT UP THE L THROTTLE AND TOLD THE PLT TO STOP BRAKING. THE PLT SAID THE R BRAKE WAS UNRESPONSIVE. WE WERE QUICKLY OFF THE TXWY AND I BROUGHT BOTH MIXTURES TO IDLE, BUT THE L PROP STRUCK A TXWY LIGHT DAMAGING THE PROP TIPS.

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.