An small transport rolled onto the overrun at the end of the runway.

Attributes
ACN	259795
Time
Date	199312
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sql
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	ground other : taxi other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 20 flight time total : 4500 flight time type : 2000
ASRS Report	259795
Person 2
Affiliation	Other
Function	other personnel
Qualification	other other : other
ASRS Report	260031
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

I was fast taxiing in an small transport on runway 30 at san carlos airport with the mechanic. The control tower had previously given authorization for the fast taxi in order to 'burn-in' the brakes which had just been changed. 3 high speed runs had been completed with speeds from 0-50 mph and the brakes applied. On the third run, speed was increased to 50 mph and braking applied with about 1000 ft of runway used before applying brakes. The brakes acted normally and appeared to be burning in properly. On the fourth run the same procedure, however, the brakes did not stop the wheel rotation. The aircraft continued on the runway decaying speed but not completely stopping the aircraft prior to reaching the end of the runway. The aircraft continued past the end of the runway onto the overrun, decaying the speed further. The exact speed was not determined. A 180 degree turn was made just past the end of the runway on the overrun. The tower authorized 2 more high speed taxi runs and also requested I report the event to the airport office after completion of taxi. 2 more high speed taxi runs were made and the brakes appeared to be satisfactory. The report was made to the airport office and the attendant there said there was a technical violation of the FARS due to the aircraft being on the overrun, even if inadvertent. There was no damage to the aircraft, runway or overrun.

Original NASA ASRS Text

Title: AN SMT ROLLED ONTO THE OVERRUN AT THE END OF THE RWY.

Narrative: I WAS FAST TAXIING IN AN SMT ON RWY 30 AT SAN CARLOS ARPT WITH THE MECH. THE CTL TWR HAD PREVIOUSLY GIVEN AUTHORIZATION FOR THE FAST TAXI IN ORDER TO 'BURN-IN' THE BRAKES WHICH HAD JUST BEEN CHANGED. 3 HIGH SPD RUNS HAD BEEN COMPLETED WITH SPDS FROM 0-50 MPH AND THE BRAKES APPLIED. ON THE THIRD RUN, SPD WAS INCREASED TO 50 MPH AND BRAKING APPLIED WITH ABOUT 1000 FT OF RWY USED BEFORE APPLYING BRAKES. THE BRAKES ACTED NORMALLY AND APPEARED TO BE BURNING IN PROPERLY. ON THE FOURTH RUN THE SAME PROC, HOWEVER, THE BRAKES DID NOT STOP THE WHEEL ROTATION. THE ACFT CONTINUED ON THE RWY DECAYING SPD BUT NOT COMPLETELY STOPPING THE ACFT PRIOR TO REACHING THE END OF THE RWY. THE ACFT CONTINUED PAST THE END OF THE RWY ONTO THE OVERRUN, DECAYING THE SPD FURTHER. THE EXACT SPD WAS NOT DETERMINED. A 180 DEG TURN WAS MADE JUST PAST THE END OF THE RWY ON THE OVERRUN. THE TWR AUTHORIZED 2 MORE HIGH SPD TAXI RUNS AND ALSO REQUESTED I RPT THE EVENT TO THE ARPT OFFICE AFTER COMPLETION OF TAXI. 2 MORE HIGH SPD TAXI RUNS WERE MADE AND THE BRAKES APPEARED TO BE SATISFACTORY. THE RPT WAS MADE TO THE ARPT OFFICE AND THE ATTENDANT THERE SAID THERE WAS A TECHNICAL VIOLATION OF THE FARS DUE TO THE ACFT BEING ON THE OVERRUN, EVEN IF INADVERTENT. THERE WAS NO DAMAGE TO THE ACFT, RWY OR OVERRUN.

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.