 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier flight crew reported they were high on the arrival into MMMX.
| Attributes | |
| ACN | 1435606 |
| Time | |
| Date | 201703 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MMMX.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Medium Large Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Published Material / Policy |
Narrative:
Originally filed via the AVSAR3B arrival; we were given direct slm; comply with DME restrictions. The direct slm removed the fixes and they had to be rebuilt. Prior to this clearance; I had drawn the 10 NM and 30 NM rings around the airport to help comply with the speed restrictions in mexico. After the clearance; I simply added a 60 NM ring to this fix info. Slm is about 18 NM prior to the airport; so my rings were about 18 NM beyond where they should have been. About 2 minutes from top of descent; ATC asked when we were going to start down. This made me recheck things and my first officer (first officer) pointed out that the rings built from the airport and not the VOR. I immediately switched to vs and deployed the speed brakes; but we still crossed 60 NM from slm at about 33000 feet (3000 feet high). I redrew the fix info page to reflect distance from slm and the 30 NM restriction was drawn correctly and met.I should have used a different technique to redraw the DME restrictions. Had I used 'slm//60' instead of the fix info page; it would have been clear that it was built from the correct point. Also; I should have asked him to double check my FMS work after I finished building it. We may have caught my error if we looked it over again from the beginning.
Original NASA ASRS Text
Title: Air Carrier flight crew reported they were high on the arrival into MMMX.
Narrative: Originally filed via the AVSAR3B arrival; we were given direct SLM; comply with DME restrictions. The direct SLM removed the fixes and they had to be rebuilt. Prior to this clearance; I had drawn the 10 NM and 30 NM rings around the airport to help comply with the speed restrictions in Mexico. After the clearance; I simply added a 60 NM ring to this fix info. SLM is about 18 NM prior to the airport; so my rings were about 18 NM beyond where they should have been. About 2 minutes from Top of Descent; ATC asked when we were going to start down. This made me recheck things and my First Officer (FO) pointed out that the rings built from the airport and not the VOR. I immediately switched to VS and deployed the speed brakes; but we still crossed 60 NM from SLM at about 33000 feet (3000 feet high). I redrew the fix info page to reflect distance from SLM and the 30 NM restriction was drawn correctly and met.I should have used a different technique to redraw the DME restrictions. Had I used 'SLM//60' instead of the fix info page; it would have been clear that it was built from the correct point. Also; I should have asked him to double check my FMS work after I finished building it. We may have caught my error if we looked it over again from the beginning.
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.