Narrative:

Aircraft X was at 35;000 ft on the track out of zzzzz [intersection]. As the aircraft was entering center's airspace; the aircraft stated that due to aircraft maintenance it was turning around. I confirmed this with the aircraft via phone patch. I then treated the aircraft as an emergency. The aircraft was cleared to descend to 34;500 ft and was told upon reaching 34;500 ft; then cleared right turned direct zznzzw; further routing to follow.

Google
 

Original NASA ASRS Text

Title: En route Controller provided emergency handling to an aircraft experiencing equipment difficulties.

Narrative: Aircraft X was at 35;000 FT on the track out of ZZZZZ [Intersection]. As the aircraft was entering Center's airspace; the aircraft stated that due to aircraft maintenance it was turning around. I confirmed this with the aircraft via phone patch. I then treated the aircraft as an emergency. The aircraft was cleared to descend to 34;500 FT and was told upon reaching 34;500 FT; then cleared right turned direct ZZnZZw; further routing to follow.

Data retrieved from NASA's ASRS site as of July 2013 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.