Navy Petty Officer 3rd Class Jalvin Yuchongtian inspects the cover for an J-52 jet engine. Navy Petty Officer 3rd Class Jalvin Yuchongtian inspects the cover for an J-52 jet engine in the hangar bay of the aircraft carrier USS Nimitz (CVN 68) on July 14, 2005. The cover is placed over the intake of the jet engine to prevent foreign objects from being sucked into the engines during maintenance. Yuchongtian is a Navy aviation machinist's mate onboard the Nimitz. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 248019-H-ZAS25-631.jpg Photo Gallery