Narrative:

In from a local routine flight; taxiing in from landing. The plane lost hydraulic pressure on the taxiway. Without hydraulic pressure there are no brakes in which to steer the plane. The plane angled off the taxiway onto the grass. No damage to the plane or structures. The plane was then towed to the hangar.

Google
 

Original NASA ASRS Text

Title: After landing; an antique fighter lost hydraulic pressure causing a brake failure. Aircraft steering is with brakes so subsequently with no steering the aircraft exited the taxiway.

Narrative: In from a local routine flight; taxiing in from landing. The plane lost hydraulic pressure on the taxiway. Without hydraulic pressure there are no brakes in which to steer the plane. The plane angled off the taxiway onto the grass. No damage to the plane or structures. The plane was then towed to the hangar.

Data retrieved from NASA's ASRS site as of May 2009 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.