Investigation Summary
The accident occurred at jetway 23 while the flight crew was preparing for US Airways Express Flight 1821. An eyewitness observed the driver approach the aircraft from the right rear, navigate around a fuel cart, and then attempt to stop the vehicle. The witness speculated the driver's foot may have slipped off the brake pedal. Post-accident testing of the belt loader revealed that all four wheels could achieve a locked condition when brakes were applied, and the engine and throttle components were functioning correctly. Although investigators initially found a 'runaway steering' condition during post-accident testing, further metallurgical and mechanical analysis at the Eaton manufacturing facility confirmed that the steering control unit (SCU) damage was a result of the impact with the aircraft rather than a pre-existing fault. The driver had completed training and passed written examinations with 100% scores just weeks before the accident, but this was her first professional role involving the operation of such ground support equipment.
Final Conclusions
The National Transportation Safety Board determines the probable cause of this accident to be the inexperience of the driver (fleet service agent) in the operation of a belt loader, which resulted in the belt loader being driven under, and colliding with, the airplane. The driver's cause of death was determined to be asphyxiation due to thoracic compression.
Video Analysis
No video analysis linked for this case file yet.
Airframe & Maintenance
Systems & Failure Modes
NMC-Wollard TC-888 Belt Loader
A four-wheeled, gasoline-powered ground support vehicle with a 297.5-inch moving belt. It features a single-seat open compartment with a steering wheel height of 47.5 inches when the belt is lowered.
Steering Control Unit (SCU)
A hydraulic unit that commands steering inputs. Post-accident marks on the spool and seal gland bushing indicated side-loading damage caused by the collision, which initially created a 'runaway' steering symptom during recovery testing.
Interesting Facts
- 01The driver had been hired by US Airways on May 9, 2005, less than one month before the accident.
- 02The belt loader weighed 5,900 pounds and had a maximum sustained speed of 18 mph.
- 03The steering wheel was bent into an oval shape and pushed downward by the impact with the aircraft fuselage.
- 04Toxicology tests detected a low concentration of diphenhydramine (antihistamine) in the driver's system.
- 05The aircraft involved was being prepared to operate as US Airways Express Flight 1821.
- 06The NTSB final report contains an internal inconsistency, listing the engines as '2 Turbo prop' in the summary table despite the correct model identification elsewhere.
Safety Actions & Advisories
Enhanced Ground Support Equipment Training
Following the accident, US Airways implemented more rigorous practical training and evaluation for new fleet service agents. This included extended supervised operation of belt loaders and ground support equipment before agents were permitted to operate them solo in active ramp areas.
Location
NO VERIFIED COORDINATES · Coordinates are the estimate published in the ntsb final report. No map is shown, because a marker here would imply a precision the record does not have.
Reported location: Ronald Reagan Washington National Airport, Arlington, Virginia, United States