Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 130; Flight Crew Type 11000
Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance; Flight Crew Requested ATC Assistance / Clarification
Chart Or Publication; Airport
We landed normally at MMUN on Runway 12L. We reviewed the 10-9 and briefed a taxi plan to Gate X before the Descent Checklist in-flight. On landing the Tower told us to exit A3 and A and contact Ground. We exited normally on A3 and fell in behind another carrier flight who had been given the same taxi instruction. From past experience we expected to taxi via D to C north to E3 to enter ramp. To our surprise the Ground Controller expected us to exit A3 and make a greater-than-90-degree turn onto Taxiway A; which now exists as a parallel full length next to Runway 12L. This taxiway IS NOT depicted on the Jeppesen 10-9 page; nor is it referred to in the information pages for MMUN! The Ground Controller said on the radio; 'I know it is not on the chart.' The omission of this taxiway on the 10-9 should be corrected ASAP.
After landing on 12L; we took the high-speed Taxiway A3. The instructions were to make a right on Alpha and contact Ground. (Other Carrier) landed in front of us and stopped on Taxiway Delta. We were potentially distracted by that; but I was also running the After Landing Flow. As we got to the A3 and Alpha intersection; the signs were a bit confusing; and looking at our charts; the only way we could turn was left to head to Taxiway Delta as we have done every time (both the Captain and I) landing on 12L. So we did go left; it looked like Other Carrier did the same thing; and we had to get a revised taxi plan from ATC. No further issues.
Air carrier flight crew reported taxi instructions to exit at a specific intersection that is not depicted on the Jeppesen charts for MMUN airport.