Possible Clues:

• Burdened with one as passenger, prepared to take off
• Of aircraft, moved slowly on ground
• Moved per ground control
• A team man gathered round and sent by cab
• Prepared to fly
• Proceeded along the tarmac
• One charged around and didn't use the bus!
• Prepared to take flight?
• Rolled up to the jetway
• Crossed the tarmac