krismiler
Ansett had the same thing happen in about 2000. A Boeing 767 sitting on a Bay at Sydney Domestic Terminal. The nose gear retracted as a test by an Engineer but no locking pin was present on the NLG so it did what it was designed to do and retracted. Ansett had several incidents and seemed to have a problem with nose gear - 747-312 on arrival at Sydney in 1994 with nose gear retracted. Qantas ended up having to jack it up and tow it for them. Another incident, less well known, failure of Engineer to chock a 767 again at Sydney Domestic Ansett Terminal, aircraft rolled forward and the radome collided with the nose in guidance system box requiring replacement. People wonder why their 767 fleet was grounded a year or so before their eventual collapse following 9/11.