<p>The only privately owned Sea Harrier vertical/short take-off and landing fighter suffered a gear collapse when making an emergency landing at the US Navy's Patuxent River test centre after experiencing a hydraulic problem.</p>
<p>This video footage posted by Nalls Aviation, the US owner of the ex-Royal Navy BAE Systems Sea Harrier F/A-2, shows the 11 November emergency vertical landing on the hover grid at Pax River in Maryland.</p>