American Airlines Boeing 727-200A incident
Boeing 727-200A and Mexicana Airlines Boeing 727-200 · Incident: near collision between aircraft en route
Event
- NTSB case
- DEN89IA089
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Incident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- Airline
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Unknown
Aircraft 1 · Boeing 727-200A
- Aircraft type
- Boeing 727
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N728
- Operator
- American Airlines
- Onboard fatalities
- Unknown
- Route
- From Dallas Fort Worth International Airport (DFW), Dallas, TXTo Cancún International Airport (CUN), CAN CUN
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 121: Air Carrier
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Near collision between aircraft
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- None
Aircraft 2 · Boeing 727-200
- Aircraft type
- Boeing 727
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- XAMXE
- Operator
- Mexicana Airlines
- Onboard fatalities
- Unknown
- Route
- From Dallas Fort Worth International Airport (DFW), Dallas, TXTo Monterrey International Airport (MTY), MARIANO ESCOBED
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 129: Foreign
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Near collision between aircraft
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- None
Cause areas
- Atc personnel(artcc) › IFR separation standards, not maintained
Approximate · Estimated position: the centre of San Antonio, TX, the place the record names. Not the accident site.
NTSB narrative
AMERICAN AIRLINE FLT 1269 & MEXICANA AIRLINE FLT 731 WERE CRUISING AT FL 290 ON SOUTHERLY HEADINGS. AFTER DEVIATING AROUND WEATHER, FLT 1269 WAS ON A SOUTH-SOUTHEASTERLY HEADING. SUBSEQUENTLY, THE TWO BOEING 727 AIRCRAFT CONVERGED TO ABOUT 1.06 MI FROM EACH OTHER, VIOLATING THE MINIMUM HORIZONTAL SEPARATION REQUIREMENT. THE OPERATIONAL ERROR OCCURRED WHEN THE ARTCC CONTROLLER WAS BUSY WITH HEAVY TRAFFIC.
Probable cause
FAILURE OF THE ARTCC CONTROLLER TO ASSURE THAT THE AIRCRAFT MAINTAINED IFR SEPARATION STANDARDS. THE CONTROLLER'S HEAVY WORKLOAD WAS A RELATED FACTOR.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN89IA089
- Event ID
- 20001213X27873
- Case number
- DEN89IA089
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status, damage. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1989-03-22.
- API snapshot SHA-256: eaacbedf0b2794ffd8726463b06e2568f3d3213c9d0802508ec812b1f092a90d; retrieved 2026-09-18T19:13:10.414Z.