B737-700
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 406; Flight Crew Type 6800
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Regained Aircraft Control
Environment - Non Weather Related; Procedure
Approaching ROPPR on the COWBY 8 with the LNAV and VNAV engaged and the autopilot on; we encountered a wake turbulence event. The aircraft rolled right approximately 35-40 degrees and pitched up. After disengaging the autopilot and rolling wings level the aircraft had climbed to 7400 FT. We immediately notified ATC of the wake turbulence event. (Other carrier) was behind us and also had a rolling event.
Upon departing on the COWBY 8 we encountered wake turbulence near ROPPR intersection. We were in LNAV/VNAV PATH just about to level at 7000 FT. The aircraft rolled about 35-40 degrees while the autopilot was engaged; and while correcting we crossed ROPPR at about 7400 FT and advised ATC of the event.
B737-700 flight crew reported overshooting an altitude restriction departing LAS following a wake turbulence encounter.