Investigation Summary
Empire Airlines Flight 8284 was operating a scheduled cargo flight for FedEx Express when it encountered freezing drizzle and mist during its approach to Lubbock. During the descent, the crew attempted to deploy flaps, but a mechanical anomaly prevented them from extending. Instead of executing a missed approach as required by standard operating procedures for a flap failure, the captain chose to continue the approach while attempting to troubleshoot the issue. The first officer, who was the pilot flying, became distracted by the captain's troubleshooting efforts. As the aircraft slowed, the crew failed to account for the increased stall speeds necessitated by the icing conditions. The aircraft's airspeed decayed significantly, triggering the stick shaker and a Terrain Awareness and Warning System (TAWS) alert. The captain took control but failed to immediately apply maximum thrust, a critical error that allowed the aircraft to enter a fully developed stall. The aircraft struck the approach lights and impacted the ground short of runway 17R, followed by a post-impact fire that destroyed the fuselage.
Final Conclusions
The NTSB determined the probable cause was the flight crew's failure to monitor and maintain a minimum safe airspeed during an instrument approach in icing conditions. Contributing factors included the failure to follow standard operating procedures regarding the flap anomaly, the captain's decision to continue an unstabilized approach, poor crew resource management, and fatigue. The captain was found to have a cumulative sleep debt and was operating during a circadian low, which likely impaired his performance and decision-making.
Video Analysis
Empire 8284 - Tricked by the circadian clock — An analysis of the Empire Airlines Flight 8284 crash, focusing on how pilot fatigue and the circadian rhythm contributed to the crew's failure to manage a flap anomaly and icing conditions.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Crew Experience
Captain
Rodney Holberton. 12,742 hours as PIC.
First Officer
Heather Cornell.
Systems & Failure Modes
Flaps
A mechanical or control failure prevented the flaps from extending to the 15-degree position during the approach.
TAWS
The Terrain Awareness and Warning System provided a 'Pull Up' alert due to the excessive sink rate, which the crew did not immediately act upon.
Stick Shaker
The stall warning system activated multiple times to warn of an impending aerodynamic stall, but the crew failed to execute the proper recovery procedure.
Interesting Facts
- 01The aircraft was an ATR 42-320 converted to a freighter in 2005.
- 02Both crew members survived the crash with the captain sustaining serious injuries and the first officer minor injuries.
- 03The NTSB found the captain was suffering from fatigue due to high-workload situations and a cumulative sleep debt.
- 04The aircraft encountered freezing drizzle, which was outside the Appendix C icing certification envelope for the ATR 42 at the time.
- 05The crew failed to apply maximum power immediately upon the stick shaker activation, waiting 17 seconds.
Safety Actions & Advisories
EASA Stick Shaker Review
The European Aviation Safety Agency reviewed airplane stick shaker settings to improve protection against stalls.
Icing Simulation Rule
Adoption of new rules regarding the simulation of icing conditions in flight simulators to better train pilots for degraded performance.
NTSB Safety Recommendations A-11-33 through -41
The NTSB issued nine safety recommendations (A-11-33 through -41) addressing the need for improved pilot training on stall recovery, specifically in icing conditions, and the requirement for flight crews to follow standard operating procedures during flap anomalies.
Icing Effects Training
Recommendation for the FAA to require that all Part 121 and 135 operators include a demonstration of the effects of airframe icing on stall speeds and handling qualities in their training programs.
Location
APPROXIMATE POSITION · AIRPORT LEVEL · Coordinates are the estimate published in the entered by an editor. The ring shows the accuracy the record supports, not the point of impact.