IFR LOFT Scenario
LOFT: Guadalajara to Mexico City
Route: MMGL → MMMX
High-altitude hub operations with terrain-ringed basin, rigid STAR compliance, and 7,316-foot elevation approach.
View FAA WINGS activity on FAASafety.gov →Scenario Overview
High-altitude hub-to-hub flight between Mexico's two largest cities through terrain-ringed airspace. Both airports sit above 5,000 feet with Mexico City at 7,316 feet — among the highest major airports in the world. Dense traffic, rigid STAR procedures, and altitude-reduced performance create a demanding scenario for Vision Jet recurrent training on the RealSimGear SFx Console, or King Air B200 turboprop training on the G1000 NXi AATD.
FAA WINGS Credit
Master 99557 cr
Complete this LOFT with one of our CFIIs to earn WINGS credit toward your pilot proficiency. Learn more at FAASafety.gov
SIDSTARILSHigh AltitudePerformanceDense Traffic
Route & Flight Plan
MMGL DEKOV UT16 OSUBI MMMX
AltitudeFL370
Distance276 nm
ETE1:02
Airport Information
Departure
MMGL
Miguel Hidalgo y Costilla International Airport
Guadalajara, Jalisco, Mexico
Elevation: 5,016 ft MSL
Runways
| RWY | Length | Surface |
|---|---|---|
| 10/28 | 13,123 ft | asphalt |
| 10R/28L | 9,843 ft | asphalt |
Frequencies
ATIS127.75
CLR121.5
GND121.9
TWR118.1
APP119.5
DEP119.5
Approaches
ILS RWY 10, ILS RWY 28, VOR RWY 10, VOR RWY 28, RNAV (GPS) RWY 10
Destination
MMMX
Benito Juárez International Airport
Mexico City, CDMX, Mexico
Elevation: 7,316 ft MSL
Runways
| RWY | Length | Surface |
|---|---|---|
| 5L/23R | 12,966 ft | asphalt |
| 5R/23L | 12,795 ft | asphalt |
Frequencies
ATIS118.65
CLR121.1
GND121.9
TWR118.1
APP119.9
DEP119.9
Approaches
ILS RWY 5L, ILS RWY 5R, ILS RWY 23L, ILS RWY 23R, VOR RWY 5L, VOR RWY 23R
Weather Scenario
Central Mexico's high-altitude plateau creates a unique weather pattern. Morning heating at 7,000+ feet elevation builds convective activity rapidly. Guadalajara starts clear but the eastbound route crosses volcanic peaks where moisture collects. Mexico City sits in the Valley of Mexico — a basin surrounded by mountains and volcanoes exceeding 17,000 feet (Popocatépetl, Iztaccíhuatl). The haze in the basin is persistent due to the inversion layer. By 1600Z, afternoon thunderstorms begin building along the mountain ridges, with the TAF showing a TEMPO of TSRA and a PROB30 of 1500m visibility in fog.
Departure 10:00L (1500Z)MMGLVFR
Good VFR at 5,016 feet elevation, scattered clouds, towering cumulus distant east
Arrival 11:00L (1600Z)MMMXMVFR
Haze at 7,316 feet elevation, visibility 4 miles, building cumulus, gusty south wind
Terminal Aerodrome Forecasts
DepartureMMGL
TAF MMGL 140530Z 1406/1506 24006KT 9999 SCT040 BKN080 FM141200 25008KT 9999 SCT035 BKN070 FM141500 24010KT 8000 SCT030 BKN060 TEMPO 1516/1520 5000 TSRA BKN025CB FM142000 24008KT 9999 SCT040 BKN080 FM150000 VRB04KT 9999 SCT050
En Route (Toluca)MMTC
TAF MMTC 140530Z 1406/1506 VRB04KT 9999 SCT050 FM141200 18008KT 8000 HZ SCT035 BKN060 FM141500 18012KT 5000 HZ SCT025 BKN050 TEMPO 1516/1520 3000 TSRA BKN020CB FM142000 18008KT 8000 SCT030 BKN060 FM150000 VRB04KT 9999 SCT040
ArrivalMMMX
TAF MMMX 140530Z 1406/1506 18008KT 6000 HZ SCT035 BKN070 FM141200 18010KT 5000 HZ SCT030 BKN060 FM141500 18012G22KT 4000 HZ SCT025 BKN050 OVC100 TEMPO 1516/1600 3000 TSRA BKN020CB PROB30 1517/1520 1500 +TSRA FG BKN010CB FM142000 18008KT 6000 HZ SCT030 BKN060 FM150000 VRB04KT 9999 SCT040
Lesson Profile
| Phase | Time | Altitude | Events |
|---|---|---|---|
| Briefing & Setup | 0:00-0:20 | Ground | High-altitude operations briefing: density altitude calculations at both airports, performance planning for reduced climb at 5,016 feet, landing distance at 7,316 feet. Brief STAR with step-down requirements. Review terrain around Mexico City (volcanoes to southeast, mountains all quadrants). |
| Departure | 0:20-0:35 | 5,016-FL370 | Depart MMGL RWY 10. Performance-limited climb at 5,016 feet density altitude. Transition through Mexican ATC sectors. Monitor terrain clearance during climb — mountains along the route exceed 10,000 feet. |
| Cruise | 0:35-0:50 | FL370 | Short cruise across the central Mexican plateau. Monitor MMMX weather — haze and convection building. Brief the STAR and approach. Begin descent planning: from FL370 to 7,316 feet, the descent gradient must account for the high field elevation. ATC traffic density increases approaching Mexico City. |
| STAR & Descent | 0:50-1:10 | FL370-9,000 | STAR into Mexico City with rigid altitude step-downs. Non-negotiable compliance — ATC sequence is tight with heavy traffic. Multiple crossing restrictions. Descend into the Valley of Mexico basin through the haze layer. Configure early — groundspeed will be higher than indicated at 7,300 feet. |
| Approach & Landing | 1:10-1:30 | 9,000-7,316 | ILS RWY 5L at MMMX. Approach at 7,316 feet elevation — true airspeed and groundspeed are approximately 15% higher than indicated. Long flare required. Gusty crosswind from the south. Watch landing distance on a 12,966-foot runway that feels shorter at altitude. |
| Debrief | 1:30-2:00 | Ground | Review: STAR compliance scoring (every constraint), high-altitude performance awareness, approach speed and flare technique at elevation, terrain awareness throughout. Discuss how high-altitude operations fundamentally change approach and landing technique. |
Post-LOFT Approach Practice
After the LOFT scenario concludes, practice 2 additional approaches for a total of 3 per session. Session is planned for up to 6 approaches — ask your CFII for additional practice.
Approach 2
MMMX
ILS RWY 23R
Opposite direction approach — different terrain picture, different wind component, practice high-altitude ILS from another sector
Approach 3
MMMX
ILS RWY 5R
Parallel runway approach — practice maintaining awareness of parallel traffic while managing high-altitude approach speed
Training Objectives
Proficiency
- Execute high-altitude operations with performance-limited climb and descent
- Comply with rigid STAR step-down requirements in dense traffic
- Fly the ILS RWY 5L at Mexico City at 7,316 feet elevation
Progress
- Calculate and apply high-altitude performance adjustments
- Manage descent energy into a terrain-ringed basin
- Demonstrate precise STAR compliance in a zero-tolerance environment
Single-Pilot CRM
- Manage workload in a high-altitude, dense-traffic environment
- Apply conservative decision-making for high-elevation operations
- Brief high-altitude approach considerations (groundspeed, landing distance)
Prepare for Your Session
How does a field elevation of 7,316 feet affect approach and landing?
At 7,316 feet with typical Mexico City temperatures (18°C), density altitude can reach 9,000-10,000 feet. True airspeed is approximately 15% higher than indicated airspeed. This means your groundspeed on approach is significantly faster than you are used to, the flare must begin earlier, and landing distance increases substantially. A 130-knot indicated approach speed becomes roughly 150 knots groundspeed. Pilots accustomed to sea-level operations consistently underestimate this effect.
What terrain surrounds Mexico City and why does it matter for IFR?
Mexico City sits in the Valley of Mexico, a high-altitude basin ringed by mountains and active volcanoes. Popocatépetl (17,802 feet) and Iztaccíhuatl (17,159 feet) are to the southeast. Mountains exceeding 10,000 feet surround all other quadrants. The missed approach at MMMX must account for this terrain — you cannot climb in any direction without terrain awareness. The STAR arrival corridors thread through gaps in the terrain ring.
Why are STAR constraints "non-negotiable" at Mexico City?
MMMX handles over 400,000 movements per year with two closely spaced parallel runways. The airspace is compressed by terrain in all directions. ATC sequences traffic through narrow arrival corridors with precise altitude and speed constraints. If you miss a crossing restriction, you disrupt the sequence for every aircraft behind you and potentially conflict with traffic in an adjacent corridor. There is no room for ATC to "work you in" — compliance is the only option.
What is the significance of the haze layer in the Valley of Mexico?
The Valley of Mexico traps pollution and moisture in a persistent inversion layer. This creates haze that can reduce visibility to 3-4 miles even without precipitation. The haze is worst in the afternoon (1500-1800Z) when heating is strongest. For IFR pilots, this means you may break out of clouds into haze rather than clear air — the visual transition to landing is more gradual and disorienting than a clean cloud break.
Instructor Notes
This scenario is about high-altitude discipline. Every pilot who flies into Mexico City for the first time is surprised by how different it feels. The approach speed is faster, the flare is different, the landing roll is longer, and the terrain is always there. Score the STAR constraints strictly — every fix, every altitude, every speed. The debrief should include a specific discussion of "what would you do differently at sea level versus 7,300 feet?" If the student cannot articulate at least three differences, they need more time with the high-altitude performance concepts.
Related IFR Training Guides
Deepen your understanding of the skills practiced in this scenario
Mastering Climb Gradients for IFR Departures
Calculate and fly departure climb gradients — obstacle clearance and terrain awareness.
Unlocking VNAV on Garmin G1000
Master vertical navigation — setup, descent planning, and common pitfalls.
Beyond CRAFT: Instrument Clearances
Master IFR clearances — complex routings, amendments, and Class B procedures.
Instrument Approach Configuration Guide
Proper aircraft configuration for approaches — speeds, flaps, and stabilization.
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