Narrative:

On departure roll flight control B system low psi message received and light illuminated. After company was notified; a decision was made by the captain to return for a precautionary landing.

Google
 

Original NASA ASRS Text

Title: A B737-400 Captain reported receiving a Flt Control B low pressure message on takeoff roll. The flight returned to departure airport.

Narrative: On departure roll Flight Control B system low psi message received and light illuminated. After company was notified; a decision was made by the Captain to return for a precautionary landing.

Data retrieved from NASA's ASRS site as of April 2012 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.