Narrative:

I was holding number four in sequence on hotel taxiway. When I applied power to continue taxiing; I lost braking action and the airplane began to turn to the right. I applied the brakes and they where not responding. The airplane was heading toward the grass area at charlie. I called the controller to ask to taxi to charlie and somebody blocked my call. Since the airplane was still not responding and the frequency was congested I switched frequency (thinking I still had ground frequency on stby) I called again (unfortunately I had departure frequency 120.9) the controller told me that I had the wrong frequency and when I switched back to tower frequency 132.05. I was already at charlie and called again and had no answer. A few seconds later the controller (in a very angry tone) calls me to tell me that before I enter charlie I needed permission. She did not give me the chance to tell her I had a situation in the airplane. She then asked me if I needed assistance and what where my intentions; to which I replied 'no assistance needed (because by that time I had regain control of the airplane) and I needed to return to apron 6. She switched me to ground frequency. With extreme caution I taxied back to apron 6 as ground had cleared me. I never got to tell the controller I had lost breaking action and that's why I entered charlie without permission.

Related reports:

Google
 

Original NASA ASRS Text

Title: A C-208B Captain reported a brake failure as she was attempting to hold short of a taxiway where prior entry permission was required as a result of frequency congestion could not communicate the aircraft's condition.

Narrative: I was holding number four in sequence on Hotel Taxiway. When I applied power to continue taxiing; I lost braking action and the airplane began to turn to the right. I applied the brakes and they where NOT responding. The airplane was heading toward the grass area at CHARLIE. I called the Controller to ask to taxi to CHARLIE and somebody blocked my call. Since the airplane was still not responding and the frequency was congested I switched frequency (thinking I still had ground frequency on STBY) I called again (unfortunately I had Departure frequency 120.9) The Controller told me that I had the wrong frequency and when I switched back to Tower frequency 132.05. I was already at CHARLIE and called again and had no answer. A few seconds later the Controller (in a very angry tone) calls me to tell me that before I enter CHARLIE I needed permission. She did not give me the chance to tell her I had a situation in the airplane. She then asked me if I needed assistance and what where my intentions; to which I replied 'NO assistance needed (because by that time I had regain control of the airplane) and I needed to return to APRON 6. She switched me to Ground frequency. With extreme caution I taxied back to APRON 6 as Ground had cleared me. I never got to tell the Controller I had lost breaking action and that's why I entered CHARLIE without permission.

Data retrieved from NASA's ASRS site as of July 2013 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.