Friday, NTSB crews and members of the FBI's Evidence Response Team were back out at the wreckage site continuing their investigation.
On Thursday, the NTSB was able to dig out the black box. Friday the box was in a laboratory in Washington D.C. for investigators to examine and see what data could be extracted.
Finding the black box was key in the NTSB's investigation. But, officials say it was not the only step.
"Finding the black box is one important step of the process, but there's still a lot of work to be done," said Robert Sumwalt with the NTSB.
Friday investigators spent the day scouring the wreckage site. They documented the damage and diagrammed the site.
The NTSB was also busy conducting their investigation away from Birmingham. Members of the agency were in Louisville, Kentucky at the UPS airline headquarters. They were expected to interview people who have flown with the accident crew and being the process of examining maintenance records.
Sumwalt said Friday's work is crucial in the investigation. However, there is still a long way to go in the investigative process. The NTSB expects the investigation to last anywhere from 12 to 18 months.
"It's a very extensive, tedious process, but we want to make sure our report is accurate and we get it right," said Sumwalt.
The NTSB is expected to wrap up their investigation in Birmingham in another 5 to 6 days.
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