B737 Undifferentiated or Other Model
Flight Crew Last 90 Days 256; Flight Crew Total 13970; Flight Crew Type 4304
Confusion; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types
Flight Crew FLC Overrode Automation
Aircraft; Environment - Non Weather Related
We were cleared for the VOR-DME 5L into MMMX. WX was clear. We briefed the approach to use VNAV and VORLOC. First of all; the approach depicts a turn prior to PLAZA to arrive on the final approach course at PLAZA. The FMC builds and flies an overshooting path over PLAZA. Additionally; we received a GPS-L invalid in the FMC scratchpad just prior to PLAZA. While on the path; the VNAV and FD guidance disconnected at approximately 1200-1400 ft AGL. We were visual at this time with the runway in sight and landing clearance. We continued the approach to a normal landing. We had a vertical path the entire time; but were unable to reengage the VNAV. I have been told that the GPS-L invalid and GPS-R invalid messages are a normal occurrence in MMMX. I do not see how this anomaly should have affected this flight especially since FO was flying and the FD master was on the right side. I believe this approach is loaded wrong into the FMC causing a big overshoot since we were below the 160 kt prior to the turn.
[Report narrative contained no additional information.]
B737 flight crew experienced a GPS outage during the VOR DME RWY 05L/R approach at MMMX. An overshoot at PLAZA resulted but the crew was able to land visually.