Runway taxiway excursion.

Attributes
ACN	308813
Time
Date	199506
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : yip
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Learjet 23
Operating Under FAR Part	Part 135
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 170 flight time total : 1610 flight time type : 170
ASRS Report	308813
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were re-positioning the aircraft from FBO a to FBO B at yip. Ground control taxied us down runway 9L to hold short of runways 23R and 23L. After holding short of runway 23L, we were told to taxi to FBO B. Upon reaching the end of runway 9L, the captain applied the brakes for the up-coming turn. He stated, 'I have no brakes.' unable to make the turn and only 5-10 ft from the edge of the runway, we exited the end of runway 9L into the grass. We were taxing on the left engine only. Subsequent inspection of the hydraulic fluid level revealed the reservoir was full. At the time of this writing, left engine hydraulic pump failure is suspected.

Original NASA ASRS Text

Title: RWY TXWY EXCURSION.

Narrative: WE WERE RE-POSITIONING THE ACFT FROM FBO A TO FBO B AT YIP. GND CTL TAXIED US DOWN RWY 9L TO HOLD SHORT OF RWYS 23R AND 23L. AFTER HOLDING SHORT OF RWY 23L, WE WERE TOLD TO TAXI TO FBO B. UPON REACHING THE END OF RWY 9L, THE CAPT APPLIED THE BRAKES FOR THE UP-COMING TURN. HE STATED, 'I HAVE NO BRAKES.' UNABLE TO MAKE THE TURN AND ONLY 5-10 FT FROM THE EDGE OF THE RWY, WE EXITED THE END OF RWY 9L INTO THE GRASS. WE WERE TAXING ON THE L ENG ONLY. SUBSEQUENT INSPECTION OF THE HYD FLUID LEVEL REVEALED THE RESERVOIR WAS FULL. AT THE TIME OF THIS WRITING, L ENG HYD PUMP FAILURE IS SUSPECTED.

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.