B757 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 808
Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Became Reoriented
Procedure; Environment - Non Weather Related
Descending via the TTORO arrival; vacating FL290; encountered moderate wake turbulence at FL285. Approximately 10-15 degrees of roll. PF disconnected autopilot and leveled aircraft briefly; then reengaged automation. Queried ATC as to the type of aircraft. Was a 737-900 7 NM ahead. The seat belt sign was off at the time. We spoke to FAs after the event and all was normal in the back.
B757 First Officer reported encountering wake turbulence at FL285 in trail of a B737-900 on descent into IAH.