Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 108; Flight Crew Type 14000
Training / Qualification; Human-Machine Interface; Communication Breakdown; Distraction
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Returned To Clearance; Flight Crew Took Evasive Action
Company Policy; Human Factors; Procedure
The flight was the first leg of a three-day trip. We had just departed Runway 27R on the RNAV Departure with a clearance to 10;000 Feet. We checked in with Departure Control and were told 'delete the 250 knot speed restriction.' We were then given a climb to 14;000 Feet and contact Center. We read back the altitude and frequency and switched to Center. We were then cleared to climb to FL240. Moments later we received a TCAS Alert and complied with its commands. We questioned ATC as to what happened and they switched us back to Departure Control. Departure Control informed us that we had mistakenly taken another aircraft's altitude clearance and frequency change. We continued on to ZZZ and called ATC upon landing. The Supervisor gave us an explanation as to what had happened. The Departure Controller had given a climb clearance and frequency change in the same transmission which he said they shouldn't do. The clearance we had taken was meant for the aircraft in front of us on the same departure.Flying out of this airport is busy enough. But flying an older model aircraft just adds to the workload. No auto throttles; no map display; etc. I feel these planes should be base specific like we did with the old pre-FMS aircraft back in the day.
The mixing of old and new technology aircraft has put my margin of risk very high. In 17 years of 121 flying; this is the first time I have ever had this type of error.
A flight crew flying a less automated aircraft than they were accustomed to and somewhat overloaded; took another aircraft's clearance which resulted in a TCAS alert along with a call to ATC.