(Cedar City, UT) - National Transportation Safety Board investigators have recovered the flight recorder and cockpit voice recorder from the crash site of the Lockheed P2V heavy air tanker that crashed Sunday while fighting the White Rock Fire in which two crew members died.

The "black boxes" have been sent to the NTSB headquarters laboratory in Washington, DC for analysis to determine what events led up to the fatal crash.

Captain Todd Neal Tompkins, 48 of Boise, Idaho and First-Officer Ronnie Edwin Chambless, 40 also of Boise, were dropping fire retardant on the White Rock Wildfire in Hamblin Valley when the plane crashed just before 2:00PM (MDT) Sunday, June 5th.

The plane was completely destroyed in the crashed which occurred in a rocky canyon overgrown with juniper. Emergency responders found both men dead from the impact of the crash in wreckage scattered over 600-yards. The wildfire eventually burned through the crash site.

NSTB investigators expect the probe to take weeks before any determination can be made depending on the condition of the black boxes.

The White Rock Fire was 90 percent contained as of Friday morning. (Related story).