Ai2014-4 Aircraft Serious Incident Investigation Report
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AI2014-4 AIRCRAFT SERIOUS INCIDENT INVESTIGATION REPORT AIR NIPPON CO., LTD. J A 1 6 A N September 25, 2014 The objective of the investigation conducted by the Japan Transport Safety Board in accordance with the Act for Establishment of the Japan Transport Safety Board (and with Annex 13 to the Convention on International Civil Aviation) is to prevent future accidents and incidents. It is not the purpose of the investigation to apportion blame or liability. Norihiro Goto Chairman, Japan Transport Safety Board Note: This report is a translation of the Japanese original investigation report. The text in Japanese shall prevail in the interpretation of the report. AIRCRAFT SERIOUS INCIDENT INVESTIGATION REPORT AIR NIPPON CO., LTD. BOEING 737-700, JA16AN NOSEDIVE FROM UPSET (LOC-I) AT AN ALTITUDE OF 41,000 FT, APPROX. 69NM EAST OF KUSHIMOTO, WAKAYAMA PREFECTURE, JAPAN AROUND 22:49 JST, SEPTEMBER 6, 2011 September 19, 2014 Adopted by the Japan Transport Safety Board Chairman Norihiro Goto Member Shinsuke Endoh Member Toshiyuki Ishikawa Member Sadao Tamura Member Yuki Shuto Member Kenji Tanaka SYNOPSIS Summary of the Incident On September 6 (Tuesday) 2011, a Boeing 737-700, registered JA16AN, operated by Air Nippon Co., Ltd., nosedived after having an unusual attitude (upset) at around 22:49 Japan Standard Time (JST: UTC+9hr, unless otherwise stated all times are indicated in JST) at an altitude of 41,000 ft about 69 nm east of Kushimoto while flying from Naha Airport to Tokyo International Airport as the scheduled flight 140 of the All Nippon Airways Co., Ltd. There were 117 people on board the aircraft, consisting of the captain, the first officer, three cabin attendants and 112 passengers. Of these people, two cabin attendants sustained slight injuries. There was no damage to the aircraft. Probable Causes It is highly probable that this serious incident occurred in the following circumstances: During the flight, the first officer erroneously operated the rudder trim control while having an intention of operating the switch for the door lock control in order to let the captain reenter the cockpit. The aircraft attitude became unusual beyond a threshold for maintaining the aircraft attitude under the autopilot control. The first officer’s recognition of the unusual situation was delayed and his subsequent recovery operations were partially inappropriate or insufficient; therefore, the aircraft attitude became even more unusual, causing the aircraft to lose its lifting force and went into nosedive. This led to a situation which is equivalent to “a case where aircraft operation is impeded.” It is probable that the followings contributed to the first officer’s erroneous operation of the rudder trim control while having an intention of operating the door lock control; he had not been fully corrected his memories of operation about the door lock control of the Boeing 737-500 on which he was previously on duty; the door lock control of the Boeing 737-500 series aircraft was similar to the rudder trim control of the Boeing 737-700 series aircraft in their placement, shape, size and operability. It is somewhat likely that his memories of operation about the switch for the door lock control of the Boeing 737-500 aircraft had not been fully corrected because he failed to be fully accustomed with the change in the location of the switch for the door lock control. It is somewhat likely that this resulted from lack of effectiveness in the current system for determining the differences training contents and its check method, under which the Air Nippon Co., Ltd. and other airlines considered and adopted specific training programs to train pilots about how to operate the flight deck switches when their locations changed and the Civil Aviation Bureau of the Ministry of Land, Infrastructure, Transport and Tourism reviewed and approved them. It is probable that the first officer’s failure to properly manage tasks contributed to his erroneous operation of the rudder trim control. It is somewhat likely that the similarities between the switches for the door lock control and the rudder trim control in their operability contributed to the delay in his recognition of the erroneous operation. Moreover, he was excessively dependent on autopilot flight and he failed to be fully aware of monitoring the flight condition. It is somewhat likely that the first officer’s recovery operations were partially inappropriate or insufficient because he was startled and confused on the occurrence of an unexpected unusual situation in which the stick shaker was activated during the upset recovery maneuver. It is somewhat likely that the followings contributed to his startle and confusion: he had not received upset recovery training accompanied with a stall warning and in unexpected situations, thereby he lacked the experience of performing duties in such situations before the serious incident, and he had not received upset recovery training at a high altitude. Recommendations 1. Recommendations to All Nippon Airways The Japan Transport Safety Board recommends All Nippon Airways, which has taken over the operational duties for Boeing 737 series aircraft from Air Nippon Co., Ltd. to take the following measures: ・Thorough implementation of basic compliance matters for cases when the aircraft is operated by a single pilot and training to this end ・Implementation of high altitude upset recovery training accompanied with stall warning and other events 2. Recommendations to the Minister of Land, Infrastructure, Transport and Tourism The Japan Transport Safety Board recommends the Minister of Land, Infrastructure, Transport and Tourism to take the following measures: ・Guidance for air carriers for implementation of upset recovery training 3. Safety Recommendations to Federal Aviation Administration (FAA) The Japan Transport Safety Board recommends the Federal Aviation Administration (FAA) of the United States of America to urge the aircraft design and manufacturing organization, (the Boeing Company,) to take the following measures: ・Studies about the necessity of reducing or eliminating similarities of the switch for the door lock control and the rudder trim control for the Boeing 737 series aircraft Abbreviations used in this report are as follows: AC : Advisory Circular ACMS : Aircraft Condition Monitoring System AE Panel : Aft Electronic Panel AOA : Angle of Attack AOM : Airplane Operations Manual ATC : Air Traffic Controller CA : Cabin Attendant CCW : Counterclockwise CDU : Control Display Unit CVR : Cockpit Voice Recorder CRM : Crew Resource Management CW : Clockwise CWS : Control Wheel Steering DFDR : Digital Flight Data Recorder EASA : European Aviation Safety Agency FAA : Federal Aviation Administration FAR : Federal Aviation Regulation FL : Flight Level FMC : Flight Management Computer FO : First Officer FRMS : Fatigue Risk Management Systems FSB : Flight Standardization Board FSTD : Flight Simulation Training Device JTSB : Japan Transport Safety Board GPWS : Ground Proximity Warning System ICAO : International Civil Aviation Organization LNAV : Lateral Navigation LOFT : Line Oriented Flight Training MAC : Mean Aerodynamic Chord MACH : Mach Number ODF : Operator Differences Requirements OM : Operations Manual PF : Pilot Flying PFD : Primary Flight Display PIC : Pilot in Command PM : Pilot Monitoring QAR : Quick Access Recorder SAFO : Safety Alerts for Operators STC : Supplemental Type Certificate TC : Type Certification TSI : Technical Service Information URT : Upset Recovery Training VD/MD : Design Dive Speed/ Corresponding Mach Number VHF : Very High Frequency communication VMO/MMO : Maximum Operating Limit Speed/ Corresponding Mach Number VNAV : Vertical Navigation VOR/DME : VHF Omnidirectional Radio range/ Distance Measuring Equipment VORTAC : VOR and Tactical Air Navigation system Unit Conversion Table 1 ft : 0.3048 m 1 in : 0.0254 m 1 kt : 1.852 km/h 1 lb : 0.4536 kg 1 nm : 1,852 m TABLE OF CONTENTS 1. PROCESS AND PROGRESS OF THE INVESTIGATION …………………………………… 1 1.1 Summary of the Serious Incident …………………………………………………………..... 1 1.2 Outline of the Serious Incident Investigation …………………………………………….... 1 1.2.1 Investigation Organization ……………………………………………………………..... 1 1.2.2 Representatives from Foreign Authorities ……………..…………………………….... 1 1.2.3 Implementation of the Investigation …………………………………………………..... 1 1.2.4 Publication of the Interim Report ……………………………………………………..... 1 1.2.5 Comments from Parties Relevant to the Cause of the Serious Incident …………. 2 1.2.6 Comments from the Relevant States ………………..………………………………….. 2 2. FACTUAL INFORMATION ……………………………………………………………………….. 2 2.1 History of the Flight ……………………………………………………………………………. 2 2.1.1 History of the Flight Based on DFDR Records and Others …………………………. 2 2.1.2 Statements of the Persons Concerned ………………………………………………….. 8 2.2 Injuries to Persons ……………………………………………………………………………... 14 2.3 Damage to the Aircraft ………………………………………………………………………… 14 2.4 Personnel Information …………………………………………………………………………. 14 2.4.1 Outline of Career …………………………………………………………………………… 14 2.4.2 Career and Training Records of FO …………………………………………………….. 15 2.5 Aircraft Information ……………………………………………………………………………. 15 2.5.1 Aircraft ………………………………………………………………………………………. 15 2.5.2 Weight and Balance ……………………………………………………………………….. 15 2.5.3 Rudder Trim SW and Door Lock Selector ……………………………………………… 16 2.5.4 Details of Rudder Trim SW ………………………………………………………………. 17 2.5.5 Details of Door Lock Selector ……………………………………………………………. 18 2.5.6 Both Switches of Both Type Aircraft ………………………………………………….…