Boeing 747 - Asiana Cargo Vuelo 991

ARAIB/AAR1105

Aircraft Accident Investigation Interim Report

Crash Into The Sea After An In-Flight Fire Asiana Airlines B747-400F/HL7604 130 km West Of Jeju International Airport July 28, 2011

September 17, 2012

Aircraft and Railway Accident Investigation Board

This

interim

report

has

been

prepared

based

on

the

factual

information gathered untilJuly 2012 given the absence of the flight recorders, and supplements a preliminary report.

Also, the purpose of the report is to provide the aviation industry and the public with the information related to the accident.

Readers are asked to note that the report is not a completed factual report or investigation report and that the ARAIB has not reached any conclusion regarding the accident.The Aviation and Railway Accident Investigation Board (ARAIB) has cooperated closely with experts from the National Transportation Safety Board, the Japan Transport Safety Board, and aircraft

manufacturers, and was supported by experts from investigation authorities in France, China, Singapore, Taiwan, and the UAE.

This interim report has been translated and published by the ARAIB tomake its reading easier for English-speaking people. As accurate as the translation may be, the original text in Korean should be considered as the work of reference.

Contents

Aircraft Accident Interim Report

Contents

Title ······························································································································ 1

Synopsis······················································································································ 1

1. Factual Information ····························································································· 3

1.1 History of Flight ·································································································· 3 1.1.1 Chronicles of Events Occurring during AAR991's Operation·············· 3 1.1.2 Flight Path of AAR991 ·················································································· 4 1.1.3 Altitude & Speed Reconstructed Based on Radar Data ····················· 6

1.2 Injuries to Persons ······························································································· 7

1.3 Damage to Aircraft····························································································· 7

1.4 Other damage ······································································································· 7

1.5 Personnel Information ························································································ 7 1.5.1 The Captain ········································································································ 7 1.5.2 The FirstOfficer ······························································································· 9 1.5.3 The Authorized Aircraft Mechanic ···························································· 11

1.6 Aircraft Information ·························································································· 12 1.6.1 Aircraft History······························································································· 12 1.6.2 Recent Maintenance History ········································································ 14 1.6.2.1 Performance of Scheduled Maintenance ················································ 14 1.6.2.2 Fault History ································································································· 15 1.6.3 Aircraft System································································································ 16

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Contents

Aircraft Accident Interim Report

1.6.3.1 Air Flow Control System ·········································································· 16 1.6.3.2 Fire Warning and Detection System...