Spelling suggestions: "subject:"airworthiness"" "subject:"airworthness""
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Crack detection in annular components by ultrasonic guided wavesLi, Zongbao 08 1900 (has links)
No description available.
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Propulsion system safety analysis methodology for commercial transport aircraftKnife, S. January 1997 (has links)
Airworthiness certification of commercial transport aircraft requires a safety analysis of the propulsion system to establish that the probability of a failure jeopardising the safety of the aeroplane is acceptably low. The needs and desired features of such a propulsion system safety analysis are discussed, and current techniques and assumptions employed in such analyses are evaluated. It is concluded that current assumptions and techniques are not well suited to predicting behaviour of the propulsion system in service. The propulsion accident history of the high bypass ratio commercial transport fleet is reviewed and an alternate approach to propulsion system safety analysis is developed, based on this accident history. Features of the alternate approach include quantified prediction of propulsion related crew error, engine-level reliability growth modelling to realistically predict engine failure rates, and quantified credit for design features which mitigate the effects of propulsion system failures. The alternate approach is validated by applying it to two existing propulsion systems. It is found to produce forecasts in good agreement with service experience. Use of the alternate approach to propulsion system safety analysis during design and development will enable accurate prediction of the expected propulsion related accident rate and identification of opportunities to reduce the accident rate by incorporating mitigating features into the propulsion system/aeroplane design.
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A framework and criteria for the operability of unmanned aircraft systemsManeschijn, Anton 12 1900 (has links)
Thesis (PhD (Electrical and Electronic Engineering))--University of Stellenbosch, 2010. / Dissertation presented in fulfilment of the requirements
for the degree of Doctor of Philosophy in Engineering
at Stellenbosch University. / ENGLISH ABSTRACT: Airworthiness certification of unmanned aircraft systems (UAS) is normally
considered to be a regulatory function. In the absence of comprehensive UAS
airworthiness regulations, the development of new and unique UAS, and their
introduction into non-segregated airspace, remain major challenges for the UAS
industry and regulators. Thus, in response, the objective of this research was to
establish a framework and guidelines, within the scope of the typical regulatory
regime, that can be used by the UAS engineering domain to ensure the safe and
reliable functioning of a UAS, whether regulated or not.
UAS airworthiness is currently mainly based on manned aircraft regulations, and the
focus is on the unmanned aircraft and the 'airworthiness' of the remote control station.
The typical UAS as a system, however, consists of more than just these elements and
a broader approach to the 'airworthiness' of a UAS is required. This study investigated
and introduces the concept of UAS operability, where the term 'operability' addresses
the safe and reliable functioning of the UAS as a system, the airworthiness of its
airborne sub-systems, and the safe and reliable functioning of its non-airborne subsystems
and functional payloads.
To ensure that the results of this study are aligned with typical aviation regulatory
systems, a regulatory basis was defined within which UAS operability guidelines
could be developed.
Based on the operability concept, and in the scope of the regulatory basis, a UAS
operability framework was developed for the UAS engineering domain. This
framework is an index and reference source from which appropriate operability
elements can be selected for a particular UAS. The scope of the framework is generic,
rather than UAS-type or -class specific, and includes operability elements for the UAS
as a system, for its airborne and non-airborne sub-systems, and for its payloads.
The framework was validated by developing lower hierarchical levels for the
framework and by populating each operability element of the framework with
appropriate engineering guidance criteria. The guidance criteria were derived and/or developed from industry 'best practices' found in the literature, or were newly
developed where no existing practices were found.
The significance of this study is found in its establishing of a generic UAS operability
framework that not only focuses on the airworthiness of the unmanned aircraft, but
addresses the operability of the UAS as a system, as well as the operability of its
airborne sub-systems, its non-airborne sub-systems and its payloads.
In practice, the UAS operability framework can be used in the UAS engineering
domain as an index and reference source to select relevant operability elements for a
particular UAS. The guidance criteria for the selected elements can subsequently be
used to develop the appropriate processes, procedures, requirements and
specifications to achieve initial operability of the UAS, and to maintain its continued
operability.
Although the objective of the research was achieved, the UAS operability framework
must still be applied and tested in real-life UAS projects and, where necessary, revised
to eliminate shortcomings and to provide for new and novel developments in UAS
engineering technologies. / AFRIKAANSE OPSOMMING: Die lugwaardigheidsertifisering van onbemande vliegtuigstelsels (OVS) word
normaalweg beskou as 'n reguleringsfunksie. In die afwesigheid van omvattende OVS
lugwaardigheidsregulasies bly die ontwikkeling van nuwe en unieke OVS, en die
inbedryfstelling daarvan in onafgesonderde lugruim, besonderse uitdagings vir beide
die OVS nywerheid en reguleerders. Die doelwit van hierdie navorsing was dus om
riglyne binne die bestek van die tipiese reguleringsregime te vestig wat deur die OVS
ingenieursdomein benut kan word om die veilige en betroubare funksionering van 'n
OVS te verseker, of dit gereguleer word aldan nie.
OVS lugwaardigheid word tans hoofsaaklik gebaseer op lugwaardigheidsvereistes vir
bemande vliegtuie. Die fokus is dan ook meerendeels op die onbemande vliegtuig en
die 'lugwaardigheid' van die afstandbeheerstasie. Die tipiese OVS bestaan egter uit
meer sub-stelsels en 'n weier beskouing van die 'lugwaardigheid' van 'n OVS is nodig.
Die konsep van OVS bedryfbaarheid is in hierdie studie ondersoek en voorgestel.
'Bedryfbaarheid' beteken in hierdie konteks die veilige en betroubare funksionering
van die OVS as 'n stelsel, die lugwaardigheid van die lug sub-stelsels, die veilige en
betroubare funksionering van die nie-lug sub-stelsels, asook die veilige en betroubare
funksionering van funksionele loonvragte.
Om te verseker dat die resultate van hierdie studie versoenbaar is met tipiese lugvaart
reguleringstelsels, is 'n reguleringsbasis omskryf vir die ontwikkeling van OVS
bedryfbaarheidsriglyne.
Gebaseer op die bedryfbaarheidskonsep, en binne die riglyne van die reguleringsbasis,
is 'n OVS bedryfbaarheidsraamwerk ontwikkel vir die OVS ingenieursdomein. Die
raamwerk is 'n indeks en verwysingsbron waaruit gepaste bedryfbaarheids-elemente
gekies kan word vir 'n bepaalde OVS. Die bestek van die raamwerk is generies en nie
beperk tot spesifieke OVS tipes of klasse nie. Die raamwerk sluit bedryfbaarheidselemente
in vir die OVS as stelsel, asook vir die lug en nie-lug sub-stelsels van die
OVS, en vir die loonvragte van die OVS. Die raamwerk se geldigheid was bevestig deur die struktuur van die raamwerk tot laer
vlakke uit te brei en gepaste ingenieursriglyne vir elke bedryfbaarheids-element in die
raamwerk te ontwikkel. Die riglyne was gebaseer op 'beste praktyke' soos beskryf in
die literatuur, of was van nuuts af ontwikkel waar geen bestaande praktyke gevind
kon word nie.
Die bydrae van hierdie studie is gesetel in die vestiging van 'n generiese OVS
bedryfbaarheidsraamwerk wat nie net gemik is op die lugwaardigheid van die
onbemande vliegtuig nie, maar wat die bedryfbaarheid in geheel van die OVS as
stelsel aanspreek, asook die bedryfbaarheid van die OVS se lug sub-stelsels, nie-lug
sub-stelsels en loonvragte.
In die praktyk kan die raamwerk in die OVS ingenieursdomein gebruik word om
gepaste bedryfbaarheids-elemente vir 'n OVS te kies. Daarna kan die
bedryfbaarheidsriglyne gebruik word om gepaste prosesse, prosedures, vereistes en
spesifikasies te ontwikkel om die OVS se aanvanklike en voortgesette bedryfbaarheid
te bewerkstellig.
Alhoewel die doelwit vir die navorsing bereik is, moet die OVS
bedryfbaarheidsraamwerk nog op werklike OVS projekte getoets word. Waar nodig,
moet die raamwerk dan hersien word om tekortkominge, asook nuwe en unieke
ontwikkelinge in OVS ingenieurstegnologie, aan te spreek.
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Effect of in-service aircraft mission variation on airline fleet managementChen, Han Hua January 1996 (has links)
The air transport markets affected by global economic climate and regional demand characteristics are evolving fairly dynamically. To cope with the evolving demand and to penetrate desired market segments, operators' usage of aircraft has been getting more and more dynamic with increased deviation from the originally designed mission objectives. The objective of this research is to investigate the effects of in-service rrusslon variation on aircraft structural performance so as to provide airlines with a more realistic approach toward better fleet management. During the research, the scenarios and phenomena causing fleet in-service mission variations were investigated. A survey on the utilisation of world-wide aircraft fleets was conducted and presented. The in-service missions of aircraft fleets were found to vary significantly in terms of mission profile. Furthermore, the utilisation patterns of individual aircraft in the same fleet of a major airline are also being thoroughly analysed. Tremendous variations of mission mixes are found among individual aircraft. In order to analyse the effects of the in-service mission variation, methodologies and models based on fatigue test results have been developed by the author. Actual service data are being input for the effect analysis. It is found that the mission variation has a considerable engineering influence on the aircraft's structural performance either in terms of mission airworthiness or fatigue life span. Finally, a conceptual model, the 'Integrated Airline Fleet Management Model' (IAFM), has been developed as a blueprint for practical application. By implementing the IAFM, airline will be able to obtain a realistic picture of the health of its aircraft. With a more reliable basis for maintenance planning, improved inspection accuracy, reduced maintenance cost and better structural airworthiness can be achieved.
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An aeroelastic model structure investigation for a manned real-time rotorcraft simulationLewis, William D. 08 1900 (has links)
No description available.
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Westhelicopter AB Aircraft Technical Status ReportIbranovic, Albin January 2009 (has links)
<p>Westhelicopter INC. has an aviation workshop providing qualified helicopter maintenance in accordance with PART-145. Maintenance and administrative base is situated in Luleå at Kallax airport. <strong>The types that Westhelicopter INC are currently authorised to service are: </strong>Eurocopter AS 350 Base/Line Maintenance, Eurocopter EC 120 Base/Line Maintenance and Robinsson R44 Base/Line Maintenance.</p><p> </p><p>The thesis work has been to make new maintenance programme for Westhelicopter INC. This maintenance programme will be used to follow-up the time of the components, service bulletins and ADs. Existing materials, as maintenance manuals and interviews with technical staff, was used to make more efficient maintenances programme. Work will be applied to all helicopters that Westhelicopter AB supplies.</p>
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Westhelicopter AB Aircraft Technical Status ReportIbranovic, Albin January 2009 (has links)
Westhelicopter INC. has an aviation workshop providing qualified helicopter maintenance in accordance with PART-145. Maintenance and administrative base is situated in Luleå at Kallax airport. The types that Westhelicopter INC are currently authorised to service are: Eurocopter AS 350 Base/Line Maintenance, Eurocopter EC 120 Base/Line Maintenance and Robinsson R44 Base/Line Maintenance. The thesis work has been to make new maintenance programme for Westhelicopter INC. This maintenance programme will be used to follow-up the time of the components, service bulletins and ADs. Existing materials, as maintenance manuals and interviews with technical staff, was used to make more efficient maintenances programme. Work will be applied to all helicopters that Westhelicopter AB supplies.
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Vytvoření CAMO (Continuing Airworthiness Management Organization) v prostředí malé organizace / Create CAMO (Continuing Airworthiness Management Organization) for small organisationMedeová, Veronika January 2018 (has links)
This diploma thesis deals with the issue of maintaining airworthiness of aircraft, which is mostly limited by time, number of flew hours or number of landings. Based on the airplane data are scheduled regular services or replacement of individual parts are performed. All organizations authorized to perform these service activities must hold a certificate issued in accordance with Part M, Subpart G. Organizations authorized to provide airworthiness monitoring are referred as CAMO. The aim of my work is to create CAMO for a small organization using one to three aircraft category CS-23 and to create a description of the regulations and requirements that this organization must follow for successful continuing airworthiness management.
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Continuing airworthiness policy and application to flying crane aircraftGao, Fei 01 1900 (has links)
This project is part of a collaborative MSc training programme between the
Aviation Industries of China (AVIC) and Cranfield University, aiming at
enhancing the competitiveness of AVIC in both international and domestic
aviation market through applying continuing airworthiness policies in the whole
aircraft development process.
The arrangement of the research project is that all students start with a Group
Design Project which is based on the Flying Crane Project provided by AVIC.
Individual research projects will address some aspects of the Flying Crane
Project during the Group Design Project, and then further developed during the
period for individual projects. The aim of this research is to apply the
airworthiness requirements and the methodology of the Maintenance Steering
Group logic (MSG-3) in the Flying Crane Project. This is because that
maintenance is one of the key factors of Continuing Airworthiness, and MSG-3
logic is the most accepted and approved method to develop scheduled
maintenance for civil aircrafts.
The main objectives of this project include: (1) To investigate current Continuing
Airworthiness regulations, including European airworthiness requirements (as
the main regulation to comply with) and Chinese airworthiness regulations (as
an important reference and supplement to the research); (2) To investigate the
main analysis methodology of reliability and maintainability, including Damage
Tolerance and Failure Mode and Effect Analysis (FMEA); (3) To analyse the
data resulted from the Group Design Project using MSG-3 logic to produce a set
of Continuing Airworthiness instructions, for the operator and maintenance
organisation of the aircraft, from the design organization’s perspective; (4) To
develop Continuing Airworthiness instructions for airline operators to compose
maintenance programmes for Flying Crane aircrafts, including maintenance
tasks and intervals for the selected airframe systems and structural components;
and (5) To identify applicable maintenance organisations in China for Flying
Crane aircrafts in accordance with both European and Chinese airworthiness
requirements.
On completion of this research, two aspects of Continuing Airworthiness have
been investigated, including maintenance programme and maintenance
organization. With MSG-3 logic, the author developed the maintenance plan for
three structural components (fuselage skin panel, wing root joint, and
fin-fuselage attachment) and one airframe system (fuel system) based on results
from the Group Design Project. The author also investigated the Chinese
domestic aircraft maintenance companies, and selected suitable maintenance
organizations based on technical and economical criteria.
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Tailoring an Airworthiness Document to Unmanned Aircraft Systems: A Case Study of MIL-HDBK-516CHalefom, Mekonen H. 17 March 2020 (has links)
With the popularity of unmanned aircraft systems (UAS), there is a growing need to assess airworthiness for safe operations in shared airspace. In the context of this thesis, shared airspace implies the introduction of UAS into airspace designated for manned aircraft. Airworthiness guidelines are generally statements that state safety requirements to prevent unwanted consequences, such as aircraft accidents. Many governmental agencies such as the U.S. Federal Aviation Administration (FAA) analyzed the risks of UAS to third-parties, all personnel and properties exterior to the aircraft. This thesis concerns the adaptation of existing airworthiness documents written for manned aircraft to UAS. The proposed method has three stages that are applied in sequence to identify relevant and irrelevant airworthiness statements, the building blocks of an airworthiness document, with regard to UAS. This method is applied to MIL-HDBK-516C, used as a case study; however, the proposed methodology can be applied to any airworthiness document developed for manned aircraft. This thesis presents a list of all MIL-HDBK-516C airworthiness statements that are directly relevant, indirectly relevant, and irrelevant to UAS; additionally, the indirectly relevant airworthiness statements to UAS are provided along with suggested modification. / M.S. / With the popularity of unmanned aircraft systems (UAS), there is a growing need to assess airworthiness for safe operations in shared airspace. Airspace is the available air for aircraft to fly in; most airspaces are regulated and are subject to the jurisdiction of a particular country. In the context of this thesis, shared airspace implies the introduction of UAS into airspace designated for manned aircraft. Airworthiness guidelines are generally statements that state safety requirements to prevent unwanted consequences, such as aircraft accidents. Many governmental agencies such as the U.S. Federal Aviation Administration (FAA) analyzed the risks of UAS to third-parties, all personnel and properties exterior to the aircraft. This thesis concerns the adaptation of existing airworthiness documents written for manned aircraft to UAS. The proposed method has three stages that are applied in sequence to identify relevant and irrelevant airworthiness statements, the building blocks of an airworthiness document, with regard to UAS. This method is applied to MIL-HDBK-516C, Department of Defense Handbook: Airworthiness Certification Criteria, used as a case study. MIL-HDBK-516C is a military handbook used for airworthiness guidance. However, the proposed methodology can be applied to any airworthiness document developed for manned aircraft. This thesis presents a list of all MIL-HDBK-516C airworthiness statements that are directly relevant, indirectly relevant, and irrelevant to UAS; additionally, the indirectly relevant airworthiness statements to UAS are provided along with suggested modification.
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