ON-BOARD MAINTENANCE SYSTEM (OMS)

On-Board Maintenance System (OMS)

Acknowledgement

I would take this opportunity to thank my research supervisor, family and friends for their support and guidance without which this research would not have been possible.

Table Of Content

ACKNOWLEDGEMENT2

INTRODUCTION4

THE CHIEF MECHANIC6

MAINTAINABILITY IMPACT ON AVAILABILITY13

MTFERROR! BOOKMARK NOT DEFINED.

MTF ARCHITECTUREERROR! BOOKMARK NOT DEFINED.

TECHNICAL CHALLENGESERROR! BOOKMARK NOT DEFINED.

DEVICE INDEPENDENCEERROR! BOOKMARK NOT DEFINED.

VERIFICATION & VALIDATIONERROR! BOOKMARK NOT DEFINED.

CONCLUSION15

ENDNOTES16

REFERENCES17

APPENDIX18

On-Board Maintenance System (OMS)

Introduction

To aid fault analysis and diagnosis of system failures, modern aircraft incorporate On-Board Maintenance System (OMS). The latest commercial aircraft produced by Boeing Company, Boeing 777, has been designed for a useful life of 20 years. Boeing recommended and authorities of the FAA and JAA decided what maintenance is required to keep the airplane airworthy while in service.

While aircraft fuel systems are not generally regarded as the most glamorous feature of aircraft functionality they are an essential feature of all aircraft. Their implementation and functional characteristics play a critical role in the design, certification and operational aspects of both military and commercial (civil) aircraft. In fact the impact of fuel system design on aircraft operational capability encompasses a range of technologies that are much more significant than the nonspecialist would at first realize, particularly when considering the complexities of large transport and high speed military aircraft applications.

To illustrate this point, Figure 1 shows the power and intersystem information flow for a typical fuel system in a modern transport aircraft application. This 'aircraft perspective' demonstrates the interconnectivity of the fuel system with the overall aircraft and provides an indication of the role of the aircraft fuel system in the functionality of the aircraft as a whole.

When total cost is considered over the life cycle, it is evident that the operating and support costs of the airplane will eventually exceed the initial acquisition cost. In order for Boeing to make the airplane attractive to the airlines, the engineers must include maintenance cost savings in the design. This was done by increasing the reliability and maintainability. Increased reliability means fewer failures to fix. Increased maintainability means shorter maintenance times. This paper would identify the Investigate an OMS on a modern aircraft, Boeing 777, from a dedicated maintenance test panel. On board maintenance systems in use on modern aircraft Boeing 777 was MTF software.

Fuel System and FMS

In fuel system applications this issue is particularly important because of the complexities of many modern aircrafts where there are a large number of significant functional interactions with other aircraft systems including:

ground refuel station

flight management system (FMS)

power management system

flight warning and advisory system

display management system

central maintenance computer

propulsion system

tank inserting system

on-board maintenance system.

Historically the equipment supplier was typically isolated from the operational problems seen by the operator community who had to pay the price (via the purchase of expensive spare parts) of functional immaturity. In this scenario there was no incentive to the supplier community to change its way of doing business. More problems in the field meant more sales of spare parts which were priced to provide good margins.

Today this situation is no longer viable and applies ...