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On 21 April 2006, a Brisbane Airport surface movement controller (SMC) issued a clearance for the driver of an aircraft tow vehicle to cross an active runway in front of a Boeing Company 737 aircraft which had been lined-up on the runway ready for departure. The crew of the 737 aircraft had been issued with a take-off clearance by the aerodrome controller (ADC) and subsequently commenced takeoff. The SMC and ADC services were being provided on separate radio frequencies.

The crew of the tow vehicle later reported that they were still within the runway strip when the 737 aircraft passed behind them airborne. The flight crew of the 737 had observed the tow vehicle crossing the runway during the take-off roll, but had assessed that the vehicle would be clear of the runway prior to them reaching its observed position and decided to continue the take-off. The SMC later reported that he had wrongly believed that he had coordinated and received a clearance for the tug to cross the runway from the ADC.

As a result of this occurrence Airservices Australia has made changes to the coordination of runway crossing clearances, including the content, form and readback requirements and has mandated the use of movement strips for the SMC position at Brisbane. It reported that it has continued with efforts to reduce the number or required runway crossings, in consultation with the airport owner and is also in the early stages of a project to procure an Advanced Surface Movement Guidance System (A-SMGCS). Airservices Australia is also actively considering and pursuing the concept of having all runway crossings occurring on the ADC frequency as recommended by the International Civil Aviation Organization.

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General details
Date: 21 April 2006 Investigation status: Completed 
Time: 15:56  
Location   (show map):Brisbane Airport Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Runway incursion 
Release date: 28 June 2007 Occurrence class: Operational 
Report status: Final Occurrence category: Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737 
Aircraft registration: VH-VXS 
Serial number: 33725 
Type of operation: Air Transport High Capacity 
Damage to aircraft: Nil 
Departure point:Brisbane, Qld
Departure time:15:56
Destination:Mount Isa, Qld
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Last update 18 April 2018