US aviation security agency blames San Fransisco-bound plane pilots for slow speed before crash

A National Transportation Safety Board (NTSB) official said that Asiana Boeing 777 flight was traveling significantly slower than normal before it crash-landed into San Francisco International Airport on Saturday.

Fox News reports that a preliminary review of recordings taken from the black boxes of

Asiana Boeing 777 showed that the crew called for more acceleration before the crash.

According to the report, the crash killed two people and injured at least 182.

The plane smashed into the runway breaking off its tail and catching fire before slumping to a stop.

NTSB Chairman Deborah Hersman said that the communications heard in the cockpit voice recorder confirms that the flight crew on Asiana Airlines Flight 214 had a visible approach to the runway to put the plane's landing gear down.

Hersman said the plane's target speed for a landing was 158 mph. But seven seconds before landing, the plane hit into a seawall. It was then that one of the crew members called on the pilots to increase speed and the engine throttles advanced.

The crew then asked to abort the landing and make another attempt 1.5 seconds before impact.

Hersman further added that the system is a ground-based aid that helps pilots stay on course while landing and it has been shut down at the San Francisco airport since June.

Dr. Margaret Knudson of the San Francisco General Hospital said among the 53 people they have treated, they have seen large numbers of abdominal injuries, some spinal fractures and patients with head trauma.