B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Aircraft; Human Factors
We departed Runway 22R on the PATSS 5 Departure. Climbing through 6000 feet we were asked by Departure Control if we were flying the departure. We said that we were and climbing to 14;000 feet. ATC informed us that we were south of course and headed direct to JAITE intersection. We looked at the MCDU and noticed that BRRRO intersection was no longer in the LEGS page. Both the First Officer (FO) and I recalled seeing BRRRO in the LEGS when we did the Departure Briefing as it has a 250 knot speed restriction. We departed behind an Airbus and we were climbing trough 4000 feet and encountered some wake turbulence and I corrected the flightpath. We made the turn at TJAYY and I was looking for the preceding aircraft and climbing through 6000 feet when we were asked about our track. ATC gave us a vector to rejoin the departure and we continued without further incident. I remember some issues in the past about the departures out of Boston and I referenced the [Airport Information Page] and found nothing about those issues any longer. I have no idea as to what may have happened for us to bypass/lose BRRRO intersection.
B737 Captain reported a wake turbulence encounter as well as a track deviation departing BOS when a waypoint dropped out of the route for unknown reasons.