Investigation Summary
The accident occurred after the crew accepted an offer from ATC for a straight-in approach to Runway 19. This required a rapid descent and quick reprogramming of the FMS. While attempting to select the 'Rozo' NDB, the pilot entered 'R' into the FMS. The system presented a list of beacons; the pilot selected the first one, 'Romeo', which was actually located near Bogotá, over 130 miles away. This caused the autopilot to initiate a sharp left turn toward the Andes mountains. The crew, focused on the descent and confused by the aircraft's movement, failed to recognize the navigational error until the Ground Proximity Warning System (GPWS) sounded. Although they attempted to climb, they failed to retract the speedbrakes, which significantly degraded the aircraft's climb performance.
Final Conclusions
The primary causes were the flight crew's failure to adequately plan and execute the approach, their lack of situational awareness regarding terrain, and the selection of an incorrect waypoint which led the aircraft off course. A critical contributing factor was the failure to retract speedbrakes during the escape maneuver.
Video Analysis
The Wrong Letter That Killed 159 People | American Airlines 965 — An in-depth look at how a simple data entry error and loss of situational awareness led to the tragic crash of AA965 in the Colombian Andes.
Watch on YouTube ↗If playback is blocked, the owner has disabled embedding — use the link above.
Systems & Failure Modes
FMS (Flight Management System)
The computer system used for navigation; a single-letter entry error led the aircraft off course.
GPWS (Ground Proximity Warning System)
Provided a 12-second warning before impact, which was insufficient due to the aircraft's configuration.
Speedbrakes
Aerodynamic spoilers used to increase drag; their extension during the climb attempt prevented the aircraft from clearing the ridge.
Interesting Facts
- 01The aircraft was only 4 years old at the time of the accident.
- 02Four passengers and a dog survived the initial impact and were rescued the following morning.
- 03The FMS database used a different identifier for the Rozo NDB ('ROZO') than the charts ('R').
- 04The speedbrakes remained deployed throughout the entire 15-second escape maneuver.
- 05The crew was over 2 hours behind schedule due to gate delays in Miami.
Safety Actions & Advisories
GPWS Enhancement
Source ↗The industry accelerated the transition from basic GPWS to Terrain Awareness and Warning Systems (TAWS/EGPWS) which use GPS and terrain databases.
CFIT Training
Airlines implemented rigorous Controlled Flight Into Terrain (CFIT) avoidance training, emphasizing immediate speedbrake retraction during escape maneuvers.
FMS Logic Changes
Manufacturers updated FMS software to improve the display of duplicate identifiers and require more explicit confirmation for significant course changes.