• Title, Summary, Keyword: Controlled Flight Into Terrain

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A Study on Prevention as result of Controlled-Flight-Into-Terrain Accident - Focusing on Guam accident, Mokpo accident, Gimhae accident (Controlled-Flight-Into-Terrain 항공 사고 예방에 관한 연구 - 괌사고, 목포사고, 김해사고 중심으로 -)

  • Byeon, Soon-Cheol;Song, Byung-Heum;Lim, Se-Hoon
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.16 no.1
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    • pp.18-28
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    • 2008
  • The purpose of this study is leading to prevent the major causes of commercial-aviation fatalities about controlled-flight-into-terrain(CFIT) in approach-and-landing accidents. The paper of major analysis for controlled flight into terrain(CFIT) was Guam accident, Mokpo accident and Gimhae accident in commercial transport-aircraft accidents from 1993 through 2002. CFIT occurs when an airworthy aircraft under the control of the flight crew is flown unintentionally into terrain, obstacles or water, usually with no prior awareness by the crew. This type of accident can occur during most phases of flight, but CFIT is more common during the approach-and-landing phase. Ninety-five percent of the Guam accident, Mokpo accident, and Gimhae accident where weather was known involved IMC, fog, and rain. The paper believed that prevention for CFIT accident was education and training for flying crew and upgrade for equipment such as EGPWS, and need more research for professional organizations of airlines, and accomplishing precision approaches should be a high priority.

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The Study of Accident Prevention through Controlled Flight Into Terrain Accident (Controlled Flight Into Terrain에 의한 항공기 사고예방 대책에 관한 연구)

  • Byeon, Soon-Cheol
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.36 no.5
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    • pp.497-506
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    • 2008
  • The purpose of this study was is leading landmark efforts to prevent the major causes of commercial-aviation fatalities about controlled flight into terrain(CFIT) in approach-and-landing accidents. The paper of major analysis for controlled flight into terrain(CFIT) was Guam accident, Mokpo accident and Gimhae accident in commercial transport-aircraft accidents from 1993 through 2002.CFIT occurs when an airworthy aircraft under the control of the flight crew is flown unintentionally into terrain, obstacles or water, usually with no prior awareness by the crew. This type of accident can occur during most phases of flight, but CFIT is more common during the approach-and-landing phase.The paper believed that prevention for CFIT accident was education and training for flying crew and upgrade for equipment such as EGPWS, and need more research for professional organizations of airlines.

A Study on Algorithm for Aircraft Collision Avoidance Warning (항공기 충돌 회피 경고 알고리듬 연구)

  • Jung, Myung-Jin;Jang, Se-Ah;Choi, Kee-Young;Kim, Jin-Bok;Yang, Kyung-Sik
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.40 no.6
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    • pp.515-522
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    • 2012
  • CFIT(Controlled Flight Into Terrain) is one of the major causes of aircraft accidents. In order to solve this problem, GPWS(Ground Proximity Warning System) is used to generate terrain collision warning using the distance between the aircraft and the underneath ground. Since the GPWS uses the vertical clearance only, it frequently generates false warnings. In this study, a terrain/obstacle collision avoidance warning algorithm was developed for fast flying and highly maneuvering fighters using the flight status and the geographic information. This algorithm condsiders the overall delay in the aircraft reactive motion including the pilot's reaction time. The paper presents a detailed logic and test methods.

The Study on Common Factors of Typical CFIT Accident with Go-around Failure and Go-around Gate Operation of Foreign Carriers (An Analysis of Korean CFIT Accidents through TEM) (복행실패로 발생한 CFIT사고의 공통요인 및 외항사 복행게이트 운영 실태에 대한 연구 (한국 대표적 CFIT사고의 TEM 분석을 중심으로))

  • Choi, Jin-Kook
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.22 no.3
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    • pp.15-23
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    • 2014
  • There have been CFIT(Controlled Flight Into Terrain) accidents that can be prevented if the crew executed go-around. This study is to analyse the common factors of three typical CFIT accidents of Korea in TEM(threat and error management) frame, and the examples of go-around gate and the countermeasures of eight airlines through the survey facilitating go-around to prevent CFIT. The common factors found in three typical CFIT accidents occurred in Korea or by Korean carriers turned out to be in mountainous terrain, in bad weather while in non-precision approach or circling approach by captain as PF(Pilot Flying) when crew make monitoring errors and communication errors. It also turned out that the crew in all three typical tragic CFIT accidents did not execute go-around in unstabilized approaches. The captains did not respond immediately when first officers advised them to go-around until it is too late. Seven out of eight Airlines answered that they use stabilized approach height as 1,000 feet to be stabilized earlier to have more safety margin by enhancing go-around gate regardless of the weather to prevent CFIT in the survey.

A Study on the Approach Methods with a Constant Vertical Speed for Diminution of CFIT Accidents in Non-Precision Approach (비정밀접근시 CFIT사고 방지를 위한 일정강하율 접근방식에 관한 연구)

  • Song, B.H.;Sin, H.S.;Moon, K.B.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.13 no.4
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    • pp.43-57
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    • 2005
  • Traditionally aircraft had descended in steps to level at the MDA(Minimum Descent Altitude) during the conduct of non-precision approach. This "de-stabilized" method of flying an instrument approach procedure is considered as a major contributing factor in CFIT(Controlled Flight Into Terrain) accident and increasing pilot workload. In the effort to reduce CFIT accident and pilot workload, VNAV(Vertical Navigation) Approach has been suggested as means to manage the vertical component of non-precision approach procedure.[1] But In the actual circumstances in Korea, VNAV has not been using to reduce them because of many restriction facts and no published VNAV chart in particular airport. Therefore we are suggesting Constant Vertical Speed Approach Method, which is required few restriction facts, and the pilots who are using this method will experience a similar method like a Glideslope during proceeding non-precision approach. Consequently, We are expecting to reduce CFIT accidents and pilot workload.

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Development of Non-precision Approach Procedures Checklist (비정밀접근절차 체크리스트 개발연구)

  • Gil, Ho-Seong;Jeon, Je-Hyung;Kim, Hyun-Soo;Son, Byung-Heum
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.24 no.3
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    • pp.37-47
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    • 2016
  • After a thorough investigation of aviation accidents involving Korean national carriers both inside and outside of Korea and also after reviewing catastrophic events involving foreign carriers in Korea, we found numerous accidents that caused fatalities and serious personal injuries. Although the aircrafts involved were found to have no specific defects, many of the accidents were caused by the pilot's misjudgement according to previous studies. Our research is to find an new procedure to help the prevention of similar accidents by focusing particularly on CFIT accidents during the procedural operations of Non Precision Approach, Circling Approach and Visual Approach. Therefore, we emphasize the significance of this research on the development of the new checklist that will help achieve a safe and effective procedural operation for non precision approaches.

A case study on the Occurrence Category of aircraft accidents and serious incidents in Korea in the 2000's (2000년대 국내 항공기 사고·준사고 발생유형 사례연구)

  • Choi, Young-Jae;Ahn, Jae-Hyung;You, Kyung-In;Park, Jung-Gown
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.21 no.4
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    • pp.119-125
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    • 2013
  • Since year 2001 to the present time, the aircraft accidents and serious incidents in our country have surpassed 150 occurrences. The Boeing has published the statistical summary of commercial jet airplane accidents annually for the past 10 years on the basis of the occurrence categories defined by the CICTT(CAST/ICAO Common Taxonomy Team), and the number of occurrences is in order of loss of control(LOC-I), controlled flight into terrain(CFIT) and runway excursion (RE). Like the NTSB and the EASA, when fatal and non-fatal accidents are aggregated, though fatality rate is low, abnormal runway contact(ARC), system/component failure(SCF-PP/NP), ground handling(RAMP) rank high in the CICTT occurrence categories. With the less occurrence frequency, it is difficult to statistically analyze the aircraft accidents in our country, thus customarily the accidents and the serious incidents on aggregate are consolidated, and the statistical analysis is performed. This study categorizes the accidents and serious incidents to the domestic transportation aircraft in the past 10 years according to the CICTT occurrence categories, that is compared with foreign practices, and the implications have been discussed. From years 2001 through 2010, the accidents to the domestic transportation aircraft occurred in order of system failure(SCF-NP), ARC and power plant failure(SCF-PP), and when the accidents and the serious incidents are consolidated and analyzed, it is verified that a distribution appears similar to the European accident occurrence categories defined from 300 accident occurrence data.

A Study on the Model Regulation's Improvement for Control of Aeronautical Obstacles in Korea (항공장애물관리규정 개선을 위한 연구)

  • Lee, Kang-Seok
    • Journal of Korean Society of Transportation
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    • v.23 no.3
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    • pp.21-34
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    • 2005
  • To control the obstacles surrounding aerodrome is significant for preventing air accident and ensuring the long sustaining of aerodromes. On the other hand, within a scope of ensuring safe flight operations, the application of Shielding is one of the issues to be importantly considered to manage efficiently the obstacles limitation around aerodromes, to dissolute the private asset privilege limitation from regulation on aerodrome circumference, and to decrease the pains to manage the obstacles, in terms of not only operating safely but also utilizing efficiently the airspace around aerodromes. The ICAO and other aviation-advanced states mitigate the construction limitation or exempt the obligation of obstacle sign by applying the shielding theory that the obstacles are not regarded as obstacles where are below the shadow surface. The Republic of Korea inserted the new regulation including the applying shielding similar to ICAO on Aviation Act and regulations. It is, however, hard to manage the aviation obstacles around aerodrome efficiently with these new regulation. Particularly, there exists much rooms to dispute because it cannot suggest the specific standard which is necessary to apply shielding theory at airspace of aerodromes. Therefore, in this study, the international standards on aviation obstacles were reviewed, analyzed and compared with those of domestic status. The direction of which guideline for control of aeronautical obstacles applicable within domestic circumstances as well as correspondent with international standard was suggested. Particularly, as far as the disputable application of shielding theory is concerned, the alternatives for aviation safety and efficient airspace operation by suggesting the clear standards alternatives were suggested.