Page:NTSB Report, Japan Air Lines Flight 813.pdf/17

- 14 - 2. ANALYSIS AND CONCESSIONS

2.1 Analysis

From the evidence obtained. during the investigation of this accident it was established that the preparations for Flight 813 were complete and conducted in a routine manner. All of the crewmembers were well qualified and properly certificated for the operation. The aircraft was properly loaded at a gross takeoff weight of 259, 330 pounds and the flight originated on time at 1305 with takeoff from Runway 01 of the San Francisco International Airport. Weather conditions were nearly clear and thus presented no adverse factor in the accident sequence which followed.

Takeoff was normal and. the flight continued to progress in a routine manner until about three minutes after takeoff when it was proceeding under climb power about 10,500 feet over the south San Francisco area. At this time there was a disintegrating engine failure of the No. 1 engine and fire broke out in the No. 1 engine, pylon and associated wing area. At the same time a progressive hydraulic failure started.

The crewmembers under the command of the captain responded to the emergency conditions with emergency procedures for engine failure, engine fire and hydraulic failure in that order. The prompt efficiency of the crew is reflected by the times of certain radio messages. These showed that between the first emergency radio call until the one advising the fire was out little more than one minute elapsed.

Still experiencing some lateral control difficulty due to the loss of hydraulic efficiency and apparently to reduced effectiveness of the left