Date: 201212
Local time of day: 0601-1200
Location: MMPB.Airport, FO
Flight conditions: VMC
Light: Dawn
Aircraft: Medium Transport; Low Wing; 2 Turbojet Eng
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
ATC / advisory: Tower MMPB
Second aircraft: Commercial Fixed Wing
Reporter organization: Air Carrier
Reporter function: Pilot Flying; First Officer
Human factors: Confusion; Situational Awareness; Time Pressure; Communication Breakdown
Second reporter function: Captain; Pilot Not Flying
Anomaly: Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Detector: Person Flight Crew
When detected: Other Takeoff Roll
Result: Flight Crew Rejected Takeoff; Flight Crew Took Evasive Action
Contributing factors: Human Factors; Procedure
Primary problem: Human Factors

Narrative: At sunrise the Captain and I had to perform an aborted takeoff due to another foreign carrier's aircraft that ignored instructions from Tower and proceeded to taxi onto the runway. It all started around when we were given clearance to pushback and start engines; after we ran checklist we were given instructions to 'taxi to Runway 35 via B; back taxi on 35; and advise when ready to depart'. As we were back taxing on the runway; I heard Tower give the Mexican Air Carrier clearance to push and start engines. As we were positioning the aircraft for departure; I heard Tower give the Mexican aircraft clearance to taxi up too and short of Runway 35 via B. As soon as Tower was done giving their clearance the other crew acknowledged instructions back to the Tower. As soon as they were done talking; I then proceeded to ask Tower for clearance for departure off of Runway 35. They gave us clearance to takeoff Runway 35 report leaving 13;000 for 15;000. I acknowledged clearance; proceeded to finish Before Takeoff Checklist. Since I was the pilot flying I proceeded to advance the thrust levers to takeoff power; Captain called '80 KTS'; I said 'Crosscheck.' He followed by stating 'Abort takeoff another aircraft is on the runway'. Captain and I next performed the aborted takeoff procedures. Everybody was all safe; we ran all of our checklists and got clearance to takeoff again Runway 35. If there were any threats I would have to say was that it was very hard to see the other aircraft taxi onto the runway because the distance from Taxiway B to approach end of Runway 35 is very long; and it was because of the other aircraft's landing lights that were on we were able to see them.


Second narrative: Three aircraft departing the station at approximately the same time; we pushed back first and taxied for takeoff on Runway 35. As we approaching the end of the runway; ATC gave clearance to the [Mexican Air Carrier] flight (in Spanish) to taxi. My First Officer speaks Spanish and later recalled their ATC instructions were to taxi to Runway 35 via Bravo and to hold short of the runway. He also said the [Mexican Air Carrier] then read the clearance back correctly. We were cleared for takeoff by ATC and began the takeoff roll. We were about 80 KTS and I saw aircraft lights down the runway so I rejected the takeoff. Our rollout to full stop was about 4;000 FT. We made the appropriate calls and did appropriate checklists. We taxied back and had a normal takeoff and flight.Just be very vigilant with any movement of the aircraft on the ground. Listen to the communication between ATC and other aircraft to have good situational awareness. Be ready for the unexpected!


Synopsis: An Air Carrier crew reported a rejected takeoff on MMPB Runway 35 because a Mexican Air Carrier aircraft entered the runway as they were just past 80 KTS.