Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Human Factors; Procedure
Arrival in Mazatlan in VMC conditions. ASOS was reporting VOR DME 1 RWY 26 in use; MZT Approach assigned VOR DME 2 RWY 26. Non-flying pilot entered ILS LOC DME 2 RWY 26 into the FMS. The FMS was improperly sequenced [and] I flew through the DME ARC intercept and aircraft continued directly to MZT. I realized I missed the intercept so I [disconnected] the autopilot and started a turn to the left. [We were in] VMC conditions; I called the field in sight and ATC issued a clearance to land. After turning left to fly towards the RWY 26 centerline; [we] received a GPWS terrain alert for a hill that was left or our course to the RWY 26 final. Being cautious of the terrain alert and maintain visual reference to the hill; I overshot final slightly; re-established and landed normally on RWY 26. I believe a contributing factor was a late clearance to descend from cruise altitude. When the autopilot did not turn onto the DME ARC; I should have called missed approach.
On [our flight to] to Mazatlan; we were cleared for the VOR DME 2 for Runway 26. My First Officer (FO) built in the approach on the FMS and we forgot to sequence the approach from the initial approach fix. On commencing the approach I noticed that we were still flying to the airport instead of the arc on the approach for the VOR DME 2 for Runway 26. We disengaged the autopilot immediately and hand flew the approach. I should have checked to make sure the approach was correctly sequenced and also paid close attention to make sure the approach was flown properly.
Air carrier flight crew reported a track deviation and GPWS terrain warning occurred on the approach to MMMZ Runway 26.