` NEW : ` ` Too early to conclude pilot ##ing , '' NTSB chief says . The agency is also checking to see if the plane 's crew was handling landing . This marked the pilot 's first time landing a Boeing 777 at the San Francisco airport .
NEW : ` ` Too early to conclude pilot ##ing , '' NTSB chief says . The agency is also checking to see if the plane 's crew was handling landing . This marked the pilot 's first time landing a Boeing 777 at the San Francisco airport .