WASHINGTON (AP) - An aviation safety official says accident investigators are looking into what role the shutdown of a key navigational aid may have played in the San Francisco plane crash.
National Transportation Safety Board Chairman Deborah Hersman says the glide slope - a ground-based aid that helps pilots stay on course while landing - had been shut down since June.
She says pilots were sent a notice warning that the glide slope wasn't available.
Hersman tells CBS' "Face the Nation" that there were many other navigation tools available to help pilots land. She says investigators will be "taking a look at it all."
The Asiana Airlines plane crashed as it was about to land Saturday, breaking off its tail and catching fire.
SAN FRANCISCO (AP) - South Korea says two veteran pilots were flying the Asiana Airlines jetliner when it crashed while landing at San Francisco's airport, killing two people.
The Ministry of Land, Infrastructure and Transport says four pilots were aboard and rotated in two-person shifts during the flight from Asia.
Officials say more than 300 passengers and crew members were aboard when it slammed into the runway and caught fire. The two dead were found outside the wreckage. Another 182 people were taken to hospitals, many with minor injuries.
San Francisco's fire chief says authorities have accounted for all passengers and crew members who were aboard the jetliner.
The flight originated in Shanghai, China with a stopover in Seoul.
National Transportation Safety Board investigators are on the scene.