On 15 April 2007, a Boeing 747-400 operated by Qantas AW on a scheduled passenger flight from Singapore to Sydney was in the final stages of a daylight approach to land on Runway 16R at Sydney when at about 100 ft agl it encountered a significant and rapid change in wind conditions. The aircraft touched down heavily and the windshear warning sounded in the cockpit. The crew, consisting of the pilot in command (acting as PNF), the copilot (acting as PF) and two relief pilots, carried out the prescribed windshear escape manoeuvre and subsequently made a second uneventful approach and landing. There were no reported injuries to passengers or crew and although some cabin panels fell down they were able to be re-fitted and a required heavy landing inspection subsequently confirmed that there was no aircraft structural damage.