sentences:  Pan American officials said a Panair do Brasil airliner circled the scene of the crash; its pilot reported extensive evidence of fire and said he saw two of the big plane's engines lying apart in the hilly, heavily wooded area.A Pan American passenger plane was converted to carry a seven-man rescue unit, headed by Maj. Richard Olney of the United States Air Force base at San Juan, Puerto Rico, and Maj. Oliver Seaman, an Air Force flight surgeon.Pan American's office at Miami reported that, after circling the scene for four hours, the rescue plane returned to its base at Para without dropping the rescue team.