Thai Airways International (THAI) said Wednesday it had encountered problems with landing gear on its Airbus A330-300 fleet prior to Sunday night's landing mishap.
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The Thai Airways International Airbus A330-300 that skidded off the runway at Suvarnabhumi airport on Sunday night was nudged out of the mud and moved to a nearby hangar Wednesday afternoon. SOMCHAI POOMLARD
Airline says landing gear had history of faults
Thai Airways International (THAI) said Wednesday it had encountered problems with landing gear on its Airbus A330-300 fleet prior to Sunday night's landing mishap
A THAI A330-300 veered off the runway after landing at Suvarnabhumi airport, injuring 40 people.
Part of the landing gear had been subject to an aviation watchdog warning
THAI executive vice-president for the technical department, Flt Lt Montree Jumrieng, said Wednesday that preliminary testing showed the accident was the result of a defective bogie beam on the aircraft's landing gear He said the faulty part caused the gear to collapse about 1km down the runway
A bogie beam connects the wheels on an aircraft's landing gear horizontally and allows them to pivot on takeoff and landing.
According to Flt Lt Montree, Airbus recommended close surveillance of the bogie beams of its A330-300 planes when THAI ordered them. The landing gear was manufactured by French-based firm Messier-Bugatti-Dowty Co.
The European Aviation Safety Authority (EASA) issued an emergency airworthiness directive on June 29, 2011, about the landing gear of some Airbus aircraft series, including the A330-300.
The directive said during ground load test cycles the main landing gear (MLG) bogie beam prematurely fractured as a result of its assembly method
"Fracture of a MLG bogie beam under high speed could ultimately result in the aeroplane departing the runway or in the bogie beam detaching from the aeroplane, or MLG collapse which could cause structural damage to the aeroplane and injury to the occupants " the directive read.
EASA ordered a reduction in the existing MLG bogie beam life cycle
"The bogie beam has a life span of 10 years and [the one which broke on Sunday] had not been replaced since it was first installed [in 2004]. But I can confirm that it was checked every two years," Flt Lt Montree said.
He said that due to the warning from Airbus, THAI checked the landing gear every two years and Airbus staff always took part in the inspections
"We found [cracks on the bogie beams] on some of our A330-300 aircraft after three to four rounds of maintenance
The affected parts were replaced," he said, stressing that THAI adheres strictly to maintenance regulations
He said the airline operates 27 Airbus A330-300 aircraft. The plane involved in Sunday's accident was delivered in 1995 and was among the first batch of 12 A330-300s that THAI purchased.
This group of aircraft is due to be decommissioned between next year and 2017.
The bogie beam involved in Sunday's accident was last checked in February last year, when it was found to be in a usable condition, Flt Lt Montree said.
He added that the plane involved in the accident would require two new engines and three new bogie beams
The plane was removed from Suvarnabhumi's eastern runway about 3.30pm Wednesday, and the runway was reopened at 8.10pm.
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adhere to: to obey a rule, law, agreement, etc. - ทำตามกฎหมาย
affected: having an effect or influence on - ถูกผลกระทบ, มีผลต่อ
airworthiness: the condition of being safe to fly - ได้มาตรฐานความปลอดภัยสำหรับการบิน
assembly: the process of putting together the parts of something such as a vehicle or piece of furniture - การประกอบ
aviation: the flying of aircraft - การบิน
based: where the main work of an organisation, business, etc. is done or controlled - ซึ่งเป็นศูนย์กลาง
batch: a group of things considered similar in type - พวก, ชุด, กลุ่ม
beam: a long thick piece of metal, concrete, etc. especially used to support weight in a building or other structure - คานรับน้ำหนัก
collapse: to suddenly fall down - ล้มลง
crack: a line on a surface where something is beginning to break apart - รอยแตก รอยร้าว
cycle: the fact of a series of events being repeated many times, always in the same order - วงจร, วัฏจักร, ระยะเวลายาวนาน
decommission: to take out of use or service - ปลดประจำการ. ปลดออกจากตำแหน่ง
defective: having a fault or faults; not perfect or complete - มีข้อบกพร่อง, มีจุดอ่อน
depart: to leave - ออกจาก
detach: to remove a part from something - ถอดออก, แยกออก
directive: an official order - คำสั่ง
due to: scheduled to - มีกำหนด
emergency: an unexpected situation involving danger in which immediate action is necessary - เหตุฉุกเฉิน
encounter: to experience something, especially something unpleasant or difficult, while you are trying to do something else - เจอ, ประสบ
existing: used now - ที่มีอยู่
fault: something that is wrong or not perfect; something that is wrong with a machine or system that stops it from working correctly - ข้อผิดพลาด, ข้อบกพร่อง
faulty: not perfectly made or not working correctly - ซึ่งมีข้อผิดพลาด
firm: a business or company - บริษัท
fleet: a group of vehicles, planes, boats, or trains, especially when they are owned by one organisation or person - กลุ่มรถแท๊กซี่, รถโดยสาร, หรือเครื่องบินที่อยู่ในบริษัทเดียวกัน
fracture: a break or crack in something hard, especially a bone - การแตก (โดยเฉพาะกระดูก)
hangar: a large building in which aircraft are kept - โรงเก็บเครื่องบิน
horizontally: going across and parallel to the ground rather than going up and down - ตามแนวนอน
injure: to hurt or cause to suffer from physical harm - บาดเจ็บ,
inspection: the act of looking closely at something or someone and to check that everything is as it should be; examination - การตรวจสอบอย่างละเอียด
install: to put a piece of equipment somewhere and make it ready for use - ติดตั้ง
involved: taking part or having a role in something - เกี่ยวข้อง
issue: to announce something officially - ออกประกาศ
landing gear: the part of an aircraft, including the wheels, that supports it when it is landing and taking off; undercarriage - ล้อหรือส่วนใดๆ ที่ใช้รับน้ำหนักเมื่อลงสู่พื้นดิน
life cycle: the series of changes that happen to a plant, animal, piece of equipment, etc. during its life or period of use - วัฏจักรชีวิต, วงชีพ , วัฏจักรชีวิต, วงชีพ, ลำดับการเปลี่ยนแปลงของสิ่งมีชีวิตในด้านการเจริญเติบโตตั้งแต่ไซโกตจนโตเต็มวัยและสืบพันธุ์ให้กำเนิดชีวิตรุ่นใหม่ได้
life span: how long a person or animal lives; how long a piece of equipment, building, etc., can be used - ระยะยาวแห่งชีวิต, ช่วงอายุ
maintenance: the act of keeping something in good condition by checking or repairing it regularly - การซ่อมบำรุง
manufacture: to make and produce a product - ผลิต
method: a particular way of doing something - วิธีการ,วิธีดำเนินการ
mishap: an accident or mistake - อุบัติเหตุ, เหตุร้าย
nudge: to make something move gradually or a little way in a particular direction; to use a part of your body, especially your elbow, to give a little push to someone or something - ดัน,ถอง,สะกิด,ดุน
occupants: people who are in a particular place, vehicle, building, etc. at a particular time - ผู้ครอบครอง
pivot: to turn or balance on a central point (= a pivot ); to make something do this - หมุนรอบเดือยหรือแกน, หมุนตัวรอบ
preliminary: early; not final - ขั้นต้น, ขั้นแรก, เบื้องต้น, ชั้นต้น
premature: happening too soon or before the usual time - ก่อนเวลาอันควร
prior to: before - ก่อนหน้า
recommend: to advise someone that they should do something - แนะนำ
reduction: the process or result of making something smaller or less in amount, size, importance etc - การลดลง
regulations: official rules that control the way that things are done - ระเบียบปฏิบัติ
replace: to put something new in place of something old - นำสิ่งใหม่มาใช้แทน
runway: a long narrow strip of ground with a hard surface that an aircraft takes off from and lands on - ทางขึ้นลงของเครื่องบิน
skid: (especially of a vehicle) to slide along a surface so that you have no control - ลื่น,เลื่อนไถล,เซ,ลื่นไหล
staff: all the workers employed by a person or organisation considered as a group - คณะผู้ทำงาน, คนงาน
stress: to emphasise something such as an idea, fact or detail; to explain why something is important - เน้น
strictly: completely - อย่างเข้มงวด
structural: having to do with structures such as buildings, bridges and roads - เกี่ยวกับโครงสร้าง
subject to: to make somebody/something experience, suffer or be affected by something, usually something unpleasant - ทำให้ได้รับ
surveillance: the process of carefully watching a person or place - การเฝ้าตรวจตราอย่างเข้มงวด
takeoff: when an airplane leaves the ground at the beginning of a flight going somewhere; departure - การร่อนขึ้นจากพื้นดิน, การบินขึ้น
ultimately: finally, after a series of things have happened - ท้ายที่สุด, ตอนสุดท้าย, ในที่สุด
veer: to suddenly move in a different direction - แฉลบ เสียทิศทาง
warning: an action or statement telling someone of a possible problem or danger - การเตือน
watchdog: an organisation or person that works to stop people from doing dangerous or illegal things - ผู้จ้องจับผิด
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