Boeing 737 arrives in Green Cove Springs, after being towed under Buckman Bridge

Jacksonville, FL — The Boeing 737 that slid off the NAS Jax runway and in to the St. Johns River has arrived at the Reynolds Marina in Green Cove Springs. It was towed on a barge from where it sat in the River, under the Buckman Bridge in the 9 a.m. hour, and down to that Marina.

GALLERY:  Plane towed on barge under Buckman Bridge

NTSB investigators were able to recover the cockpit voice recorder.

“It will be in the area and in a secure, covered location where investigators can look more closely at the numerous systems and operating facilities”, said NTSB spokesman Eric Weiss.

The Florida Department of Transportation says it does not intend to close the Buckman Bridge as the barge and plane pass underneath.

All 143 passengers and air crew on board Friday's flight were safely rescued with minor injuries, but a dog and two cats in the cargo area died. The Miami Air International charter plane was transporting both military and civilian personnel from Naval Station Guantanamo Bay, Cuba to Naval Air Station Jacksonville Friday night, when the incident happened.

The NTSB is currently investigating what went wrong with the landing. The preliminary investigation so far has shown that the pilots had been planning to land on a different runway, but asked air traffic control to let them change the approach. The NTSB says the pilots were warned the runway they wanted to switch to was effectively shortened because of barriers that were temporarily set up, but the pilots proceeded with their decision. It's unclear at this time why the pilots chose to change the landing approach, but the NTSB is hoping they will get more answers to that from the cockpit voice recorder. That device was underwater for several days, but has since been recovered.

GALLERY: Plane slides in to the St. Johns River after overrunning NAS Jax runway 

The NTSB will also be investigating the maintenance history of the plane. Investigators say maintenance records show the left-hand thrust reverser- which is intended to help slow the plane- was “inoperative”, but there are procedures to work around that. They will also be examining the work/rest history of the pilots, their training, recent experience, and related areas.