How can an helicopter end up with the same tail number than an airplane?
N133AA appeared on an American Airlines DC10, but American Airlines retired, sold or scrapped all their DC10 and MD11 aircraft by 2002, releasing the registrations for other uses.

Wind the clock forward 15 years and somebody has used N133AA for a Robinson R44 helicopter. I speculate that the effective owner of the helicopter is one Agustin Anaya, who submitted the photographs to JetPhotos, even though the aircraft is registered to a company.

The FAA registry shows only the helicopter because the American Airlines usage was released long ago.