Narrative:

During takeoff roll; the master caution light and bleed leak right EICAS message illuminated. Once airborne; other EICAS messages were received and it was determined that the complete right side of the pneumatic system was inoperable. Dispatch and [maintenance] were consulted about the continuation of the flight to the destination. Subsequently; we were advised by ATC that an [aircraft] on the ground reported seeing large pieces of debris falling from behind our aircraft. We were also advised by the flight attendants that a loud noise was heard during takeoff. It could not be determined if it was from our aircraft or FOD on the runway. The decision was made to return to [departure airport]. Approach and landing were normal.

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Original NASA ASRS Text

Title: B777 Captain reported returning to departure airport after the complete right side pneumatic system was determined to be inoperative.

Narrative: During takeoff roll; the Master Caution Light and Bleed Leak Right EICAS message illuminated. Once airborne; other EICAS messages were received and it was determined that the complete right side of the pneumatic system was inoperable. Dispatch and [maintenance] were consulted about the continuation of the flight to the destination. Subsequently; we were advised by ATC that an [aircraft] on the ground reported seeing large pieces of debris falling from behind our aircraft. We were also advised by the Flight Attendants that a loud noise was heard during takeoff. It could not be determined if it was from our aircraft or FOD on the runway. The decision was made to return to [departure airport]. Approach and landing were normal.

Data retrieved from NASA's ASRS site 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.