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Douglas D Boyd - One of the best experts on this subject based on the ideXlab platform.

  • causes and risk factors for fatal accidents in non commercial twin engine piston general aviation aircraft
    Accident Analysis & Prevention, 2015
    Co-Authors: Douglas D Boyd
    Abstract:

    Accidents in twin-engine aircraft carry a higher risk of fatality compared with single engine aircraft and constitute 9% of all general aviation accidents. The different Flight profile (higher airspeed, service ceiling, increased fuel load, and aircraft yaw in engine failure) may make comparable studies on single-engine aircraft accident causes less relevant. The objective of this study was to identify the accident causes for non-commercial operations in twin engine aircraft. A NTSB accident database query for accidents in twin piston engine airplanes of 4-8 seat capacity with a maximum certified weight of 3000-8000lbs. operating under 14CFR Part 91 for the period spanning 2002 and 2012 returned 376 accidents. Accident causes and contributing factors were as per the NTSB final report categories. Total annual Flight Hour data for the twin engine piston aircraft fleet were obtained from the FAA. Statistical analyses employed Chi Square, Fisher's Exact and logistic regression analysis. Neither the combined fatal/non-fatal accident nor the fatal accident rate declined over the period spanning 2002-2012. Under visual weather conditions, the largest number, n=27, (27%) of fatal accidents was attributed to malfunction with a failure to follow single engine procedures representing the most common contributing factor. In degraded visibility, poor instrument approach procedures resulted in the greatest proportion of fatal crashes. Encountering thunderstorms was the most lethal of all accident causes with all occupants sustaining fatal injuries. At night, a failure to maintain obstacle/terrain clearance was the most common accident cause leading to 36% of fatal crashes. The results of logistic regression showed that operations at night (OR 3.7), off airport landings (OR 14.8) and post-impact fire (OR 7.2) all carried an excess risk of a fatal Flight. This study indicates training areas that should receive increased emphasis for twin-engine training/recency. First, increased training should be provided on single engine procedures in the event of an engine failure. Second, more focus should be placed on instrument approaches and recovery from unusual aircraft attitude where visibility is degraded. Third, pilots should be made aware of appropriate speed selection for inadvertent Flights in convective weather. Finally, emphasizing the importance of conducting night operations under instrument Flight rules with its altitude restrictions should lead to a diminished proportion of accidents attributed to failure to maintain obstacle/terrain clearance. Language: en

  • causes and risk factors for fatal accidents in non commercial twin engine piston general aviation aircraft
    Accident Analysis & Prevention, 2015
    Co-Authors: Douglas D Boyd
    Abstract:

    Accidents in twin-engine aircraft carry a higher risk of fatality compared with single engine aircraft and constitute 9% of all general aviation accidents. The different Flight profile (higher airspeed, service ceiling, increased fuel load, and aircraft yaw in engine failure) may make comparable studies on single-engine aircraft accident causes less relevant. The objective of this study was to identify the accident causes for non-commercial operations in twin engine aircraft. A NTSB accident database query for accidents in twin piston engine airplanes of 4-8 seat capacity with a maximum certified weight of 3000-8000lbs. operating under 14CFR Part 91 for the period spanning 2002 and 2012 returned 376 accidents. Accident causes and contributing factors were as per the NTSB final report categories. Total annual Flight Hour data for the twin engine piston aircraft fleet were obtained from the FAA. Statistical analyses employed Chi Square, Fisher's Exact and logistic regression analysis. Neither the combined fatal/non-fatal accident nor the fatal accident rate declined over the period spanning 2002-2012. Under visual weather conditions, the largest number, n=27, (27%) of fatal accidents was attributed to malfunction with a failure to follow single engine procedures representing the most common contributing factor. In degraded visibility, poor instrument approach procedures resulted in the greatest proportion of fatal crashes. Encountering thunderstorms was the most lethal of all accident causes with all occupants sustaining fatal injuries. At night, a failure to maintain obstacle/terrain clearance was the most common accident cause leading to 36% of fatal crashes. The results of logistic regression showed that operations at night (OR 3.7), off airport landings (OR 14.8) and post-impact fire (OR 7.2) all carried an excess risk of a fatal Flight. This study indicates training areas that should receive increased emphasis for twin-engine training/recency. First, increased training should be provided on single engine procedures in the event of an engine failure. Second, more focus should be placed on instrument approaches and recovery from unusual aircraft attitude where visibility is degraded. Third, pilots should be made aware of appropriate speed selection for inadvertent Flights in convective weather. Finally, emphasizing the importance of conducting night operations under instrument Flight rules with its altitude restrictions should lead to a diminished proportion of accidents attributed to failure to maintain obstacle/terrain clearance.

Petr Jan - One of the best experts on this subject based on the ideXlab platform.

  • Creation of ATO with Flight training on BUT
    Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019
    Co-Authors: Petr Jan
    Abstract:

    The subject of this thesis is a study of requirements related to the creation of an approved organization for Flight training (ATO), including the design of organizational structure and staffing in the conditions of the Brno University of Technology. The first part of the thesis maps relevant legislative sources and all possible types of training organizations. The next part of the thesis is focused on the selection of the appropriate type of training organization, organizational and personal integration into the structure of BUT, description of the aircraft fleet, selecting the appropriate airport and calculating the expected price of the Flight Hour Cessna C172S license plate OK-VUT. The conclusion of the thesis deals with the competitiveness of the created training organization and possible possibilities of expanding the provided training

  • Creation of ATO with Flight training on BUT
    Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019
    Co-Authors: Petr Jan
    Abstract:

    Předmětem této diplomové práce je studie požadavků souvisejících s vytvořením schválené organizace pro letecký výcvik (ATO) včetně návrhu organizační struktury a personálního zajištění v podmínkách Vysokého učení technického v Brně (VUT). První část práce mapuje relevantní legislativní prameny a všechny možné typy výcvikových organizací. Další část práce je zaměřena na výběr vhodného typu výcvikové organizace, organizační a personální začlenění do struktury VUT, popisem letadlového parku, výběrem vhodného letiště a výpočtem předpokládané ceny letové hodiny letounu Cessna C172S poznávací značky OK-VUT. Závěr práce pojednává o konkurenceschopnosti vytvořené výcvikové organizace a o případných možnostech rozšíření poskytovaného výcviku.The subject of this thesis is a study of requirements related to the creation of an approved organization for Flight training (ATO), including the design of organizational structure and staffing in the conditions of the Brno University of Technology. The first part of the thesis maps relevant legislative sources and all possible types of training organizations. The next part of the thesis is focused on the selection of the appropriate type of training organization, organizational and personal integration into the structure of BUT, description of the aircraft fleet, selecting the appropriate airport and calculating the expected price of the Flight Hour Cessna C172S license plate OK-VUT. The conclusion of the thesis deals with the competitiveness of the created training organization and possible possibilities of expanding the provided training.

L Molent - One of the best experts on this subject based on the ideXlab platform.

  • the equivalence of eps and eifs based on the same crack growth life data
    International Journal of Fatigue, 2015
    Co-Authors: J P Gallagher, L Molent
    Abstract:

    Abstract This paper reviews variable amplitude (VA) fatigue crack growth rate descriptions and then reports on methods for establishing starting crack sizes in damage tolerance and durability analyses. The growth rate data were generated using 68 low stress concentration (Kt) test coupons made from 7050-T7451 aluminium alloy and subjected to five fighter aircraft VA stress histories (each stress history had either two or four stress scaling factors). The experimental da/dt data are described using a simple power law relationship where da/dt = C · Krefm. Four separate approaches for fitting the da/dt data to determine the derived constants C and m are evaluated. The fitted power law exponent (m) values for the individual spectrum da/dt behaviours are found to be slightly greater than 2.0. The paper summarizes the equivalent initial flaw size (EIFS) results (based on the fits from four da/dt fitting approaches) and compares the EIFS values to the corresponding equivalent pre-crack size (EPS) values based on a back extrapolation of the ln(a) vs. Flight Hour fit to 0.0 Flight Hours. It is noted that the EIFS and EPS values compare extremely well.

Pérez Alcaraz Jorge - One of the best experts on this subject based on the ideXlab platform.

  • Estudio de la comparación del riesgo y probabilidad de accidentes entre la flota Boeing 737 y la flota Airbus A320
    'Universitat Politecnica de Valencia', 2019
    Co-Authors: Pérez Alcaraz Jorge
    Abstract:

    [ES] En este proyecto final, el objetivo es mejorar e incrementar nuestro conocimiento sobre accidentes o eventos de aeronaves y calcular el riesgo y la fiabilidad de dos grandes compañías como Boeing y Airbus; y más específicamente, el estudio se realizará con datos de la flota de Airbus A320 y la familia Boeing 737. Además, este proyecto es útil para confirmar que este tipo de vehículo y modo de transporte de bienes y personas es uno de los más seguros. Primero, un poco de historia de cada empresa y una comparación entre ellas se llevó a cabo. Después de eso, las definiciones necesarias para continuar con el proyecto (como accidente, naturaleza del vuelo, categoría de accidente, tipo de evento no deseado, etc.) se presentan en este momento antes de comenzar con los cálculos. Siguiendo con la idea anterior, se calculó cuánta probabilidad hay de que un avión tenga un accidente en diferentes fases de vuelo y dependiendo también del tipo de evento no deseado, para cada compañía. También, mediante diferentes fórmulas y ecuaciones, calculamos la probabilidad de accidente por vuelo y por hora de vuelo. Estos últimos parámetros fueron utilizados para cálculos posteriores. Además, se llevó a cabo un análisis de riesgos, así como el cálculo del riesgo y la fiabilidad de la flota de cada compañía. Todo esto con una base de datos de más de 250 accidentes entre ambas compañías.[EN] In this final Project, the aim is to improve and increase our knowledge about aircraft accidents or events and to calculate the risk and reliability of two big companies such as Boeing and Airbus; and more specific, the study will be done with data from Airbus A320 fleet and Boeing 737 family. Also, this project is useful to confirm that this type of vehicle and way of transport godos and people is one of the safest. First, some history of each company and a comparison between them was made. After that, the definitions needed to continue with the project( like accident, nature of Flight, category of accident, undesirable evento, etc) are presented in this moment before starting with the calculations. Following with the previous idea, how much likely is an airplane to have an accident in different phases of Flight and depending also in the type of undesirable event was calculated, for each company,. The probability of accident per Flight and per Flight Hour were also computed. These last parameters were used for further calculations. Besides, hazard analysis was carried out, as well as the calculation of the risk and reliability of each company¿s fleet. All of this with a database of more than 250 accidents between both companies.Pérez Alcaraz, J. (2019). Estudio de la comparación del riesgo y probabilidad de accidentes entre la flota Boeing 737 y la flota Airbus A320. http://hdl.handle.net/10251/125612TFG

Rincón Bastidas, Natalia Jinet - One of the best experts on this subject based on the ideXlab platform.

  • Desarrollo de un SGC para la compañía horizontal de aviación S.A.S bajo los lineamientos de la ISO 9001:2008.
    2016
    Co-Authors: Rincón Bastidas, Natalia Jinet
    Abstract:

    El presente proyecto lleva en su contenido el desarrollo de la base documental de la compañía HORIZONTAL DE AVIACIÓN S.A.S, la cual se dedica a prestar el servicio de mantenimiento y reparación de aeronaves de ala fija según certificado de funcionamiento CDF-025 donde se exponen los alcances en los trabajos que puede realizar bajos los lineamientos de la norma ISO 9001:2008. El sector aeronáutico ha realizado grandes avances tecnológicos que traen consigo cambios tanto internos como externos en las compañías, las aeronaves cada día traen consigo sistemas que ayudan al personal humano que las maneja, es por ello que la mentalidad para efectuar trabajos a estas aeronaves debe ser 100% calidad, puesto que un pequeño error en un proceso de mantenimiento puede conllevar a grandes dificultades para el piloto y su tripulación en vuelo. La U.A.E.A.C, ha realizado trabajos excelentes controlando desde el más mínimo detalle de las empresas que prestan dichos servicios, HORIZONTAL DE AVIACIÓN S.A.S ha querido contribuir con el sector aeronáutico, demostrando que sus procesos, su personal y su infraestructura cumplen con dichos controles y así facilitar el control que hace la entidad regulatoria. El desarrollo documental de la compañía empieza con un diagnóstico inicial basado en la utilización de diferentes herramientas para la obtención de datos como, las encuestas a técnicos de mantenimiento para un completo análisis de las casa de calidad, elaboración y diligenciamiento de lista de chequeo sobre la norma ISO 9001:2008 apoyada sobre los conocimientos del gerente y director de calidad de la compañía, análisis de datos que dan como resultado la carencia de ciertos aspectos de la norma y la necesidad que representa tener un sistema de calidad dentro de una empresa que presta un servicio tan delicado. Basado en el diagnóstico inicial se inicia el proceso de la base documental, del sistema de gestión de calidad bajo los lineamientos de la norma ISO 9001:2008, donde se plantea el mapa de procesos respectivo, organigrama, misión, visión, política de calidad, objetivos, control y proceso de auditorías internas y externas etc…, que van respectivamente en el contenido del manual de calidad, manual de procesos, manual de perfiles de cargo. Basados en la necesidad de poder controlar de manera eficiente las hora hombre, los inventarios y tener mejor claridad de las aeronaves a las que se le debe prestar mayor atención, se realizó un control estadístico sobre las ordenes de trabajo que se abren en el transcurso del años, de allí se extrajeron los datos más relevantes mostrando así cuales modelos de aeronave presenta mayor frecuencia en mantenimientos no programados o correctivos y sobre que parte del aeronave se debe prestar mayor atención para evitarlos y así disminuir costo para el operador y para la compañía. Por último el proyecto muestra un estudio financiero de la relación costo – beneficio, para la Compañía HORIZONTAL DE AVIACIÓN S.A.S en caso de una futura implementación, mediante el uso de herramientas financieras, donde muestra el escenario en el que probablemente se puede mover la compañía si llegase a implementar en su totalidad la norma.This project contains the development of the records and document process implemented by the company HORIZONTAL DE AVIACION S.A.S. This company is dedicated to service, maintenance and repair of fixed-wing aircraft based on the certificate of operation CFD-025 which describes the scope of activities that maybe performed under the guidelines of ISO 9001:2008. The aeronautical sector has made great technological advances, which translate, to operational changes in the daily operations within the company. The aircraft maintenance systems ensure that the mechanical integrity teams carry out daily inspections and repairs with the highest workmanship and quality. The deviation of these processes can lead to mechanical failure and fatalities. The U.A.E.A.C has done an excellent job regulating the companies that provide these services. HORIZONTAL Aviation S.A.S has contributed to the aeronautical sector by showing that its processes, staff and infrastructure comply and surpass current regulation standards; thus, facilitate the regulatory process. Documentary process starts with an initial diagnosis with the implementation of different tools to obtain relevant data. Such tools include technical surveys to build a full analytical representation of the House of Quality, the production and processing checklist on the standard ISO 9001:2008. The assurance of the expertise the manager and director of the quality controls along with the data analysis result in superior standard work and a quality system that provide highly technical and excellent service. Based on the initial diagnosis, the document process of the quality system management begins under the guidelines of ISO 9001:2008, where the respective process map, chart, mission, vision, policy of quality, objectives, control and process of internal audits and external are documented in the contents of the quality manual, manual processes, manual charge profiles respectively. The need to control efficiently billable Hours and inventory led to a statistical study of work orders over several years of operation. The resulting data analysis showed which aircraft models were serviced the more frequently for non-programmed corrective maintenance. This resulted in a revision of maintenance procedures in aircraft inspections and repairs manuals and reports. As a result, an optimization of Flight Hour between repairs was achieved and the financial repercussions were minimized. Finally, the project shows a cost-benefit financial study for the future implementation of new standards with financial tools, which predict a favorable scenario for HORIZONTAL Company of aviation S.A.S