WASHINGTON (AP) — The Asiana Airlines captain who crashed a Boeing 777 at San Francisco International Airport in July told investigators he was stressed out and "very concerned" about attempting a visual approach because the runway's automatic warning systems were out of service due to construction.

Lee Kang Kuk, a 46-year-old pilot who was landing the big jet for his first time at San Francisco, "stated it was very difficult to perform a visual approach with a heavy airplane," according to an investigative report released Wednesday. The jet crash landed after approaching low and slow in an accident that left three dead and more than 150 injured.

The report was released at the start of a daylong National Transportation Safety Board hearing into the accident.

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