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Air carrier flight crew reported receiving non-standard vectors and a GPWS terrain warning on an approach to MMMX.
| Attributes | |
| ACN | 1504453 |
| Time | |
| Date | 201712 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MMMX.Airport |
| State Reference | FO |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | Large Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
On approach to mexico city; received a terrain warning as we maneuvered for ILS 23L. We had planned an ILS 05R and after 3 off course vectors to intercept various radials inbound to slm; we were then given a vector to intercept 053 radial to mex with a 120 degree intercept angle. We were then cleared to intercept 053 radial mex with a 90 degree intercept as we came close to radial and descend to 12000 ft. We were within 30 DME of mex; assigned 200 kts. We were then cleared to 'complete the approach'. I elected to start descent to 10200 ft for a crossing alt at 10 DME. As I maneuvered slight right of course to the north to remain clear of the terrain; we received a terrain warning. We landed uneventful on 23L. We were VMC and I saw the terrain. I disconnected the autopilot and stopped descent until we were past terrain. I did not note high terrain on [the] plate for an approach to 23L. I thought I was inside the terrain area based on the approach plate for ILS 23L 2 DME.I should have delayed the start of my descent until I was past the terrain.
Original NASA ASRS Text
Title: Air Carrier flight crew reported receiving non-standard vectors and a GPWS terrain warning on an approach to MMMX.
Narrative: On approach to Mexico City; received a terrain warning as we maneuvered for ILS 23L. We had planned an ILS 05R and after 3 off course vectors to intercept various radials inbound to SLM; we were then given a vector to intercept 053 radial to MEX with a 120 degree intercept angle. We were then cleared to intercept 053 radial MEX with a 90 degree intercept as we came close to radial and descend to 12000 ft. We were within 30 DME of MEX; assigned 200 kts. We were then cleared to 'complete the approach'. I elected to start descent to 10200 ft for a crossing alt at 10 DME. As I maneuvered slight right of course to the north to remain clear of the terrain; we received a terrain warning. We landed uneventful on 23L. We were VMC and I saw the terrain. I disconnected the autopilot and stopped descent until we were past terrain. I did not note high terrain on [the] plate for an approach to 23L. I thought I was inside the terrain area based on the approach plate for ILS 23L 2 DME.I should have delayed the start of my descent until I was past the terrain.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.