Narrative:

Lost left emergency AC bus. Returned to airport of departure.

Google
 

Original NASA ASRS Text

Title: DC10 CREW LOST L EMER AC BUS.

Narrative: LOST L EMER AC BUS. RETURNED TO ARPT OF DEP.

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.