AirAsia crash: Faulty part ‘major factor’

Faulty equipment was a “major factor” in the AirAsia plane crash last December that killed all 162 people on board, Indonesian officials say.

The plane’s rudder control system malfunctioned four times during the flight – a fault that occurred 23 times in the preceding year, officials said.

Their report added that the crew’s response contributed to the disaster.

The Airbus A320-200, travelling from Surabaya to Singapore, crashed into the Java Sea on 28 December 2014.

Investigators had initially indicated that stormy weather was a major factor in the crash – however, they now say that this was not a cause.

The new report from the National Transport Safety Committee, released after a year-long investigation, found that the soldering on a tiny electronic part in the system that controlled the rudder was cracked, causing it to send four warning signals to the pilots.

The crew tried to fix the problem by resetting the computer system, but this disabled the autopilot. They then lost control of the plane.

The plane then entered “a prolonged stall condition that was beyond the capability of the flight crew to recover”, the report said.

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 crash /kraʃ/  N

a violent collision, typically of one vehicle with another or with an object.

“a car crash”



accident, collision, smash, bump, car crash, car accident, road accident, traffic accident, road traffic accident, RTA, multiple crash, multiple collision;

“there was a crash on the main road”


faulty  Adj  /ˈfɔːlti,ˈfɒlti/

not working or made correctly; having defects.

“a faulty brake”

synonyms: malfunctioning, broken, damaged, defective, not working, not functioning, in disrepair, out of order, out of commission, inoperative, unsound, unusable, useless;


 on board

on or in a ship, aircraft, or other vehicle.

“a plane crashed with three people on board”


rudder uk   /ˈrʌd.ər/  us   /-ɚ/   N

سُکّان ابزاری است که در شناورها و هواگردها برای تغییر جهت حرکت بکار می‌رود. سکان عموماً از یک تیغه و میله و لولا تشکیل شده و به پاشنهٔ شناور متصل است و در زیر آب قرار دارد. سکان به بدنه ناو یا هواپیما لولا شده است و با حرکت دادن دسته یا اهرمی به چپ و راست می‌چرخد. این صفحه جریان شاره را در اطراف بدنه ناو یا هواپیما تغییر می‌دهد و بدین وسیله جهت حرکت آن را عوض می‌کند

malfunction  V  /mælˈfʌŋk·ʃən/

(of a ​machine, ​piece of ​equipment, or ​organ) to ​fail to ​work ​correctly:

“The ​equipment malfunctions at ​temperatures below ​freezing.”


preceding Adj  uk   /prɪˈsiː.dɪŋ/  us   /priː-/

Existing or coming immediately before another or others:

“the preceding year”;

“the preceding page.”

“The ​paintings are a ​development of ​ideas she ​explored in the preceding ​decade.”


crew  /kruː/  N

a group of people who work on and operate a ship, aircraft, etc.

“he was one of nine members of the crew killed when the plane went down”


Contribute /kənˈtrɪbjuːt/ V

to be one of the things that help to make something happen

contribute to:

The scandal certainly contributed to their defeat at the last election.


Initially /ɪˈnɪʃ(ə)li/ Adv

 at first.

“initially, he thought the new concept was nonsense”


at first, at the start, at the outset, in/at the beginning, to begin with, to start with, originally, in the early stages, in the first instance

“initially, Steve cleared tables and washed up”




Reset /riːˈsɛt/ V

to press a special button or to make changes so that a machine will work again or work in a different way

disable: /dɪsˈeɪ·bəl/ V

to make something or someone ​unable to ​act in the ​correct or ​usual way:

“Thieves disabled the museum’s ​alarm ​system.”

Autopilot /automatic pilot   /ˈɔːtəʊˌpʌɪlət/   N

a device for keeping an aircraft on a set course without the intervention of the pilot.

Prolonged: /prəˈlɒŋd/

continuing for a long time

the effects of prolonged exposure to the sun’s rays

a prolonged period of silence

stall /stɔːl/

an occasion when a vehicle’s engine suddenly stops working