Programa de Atualização Profissional

Applications of data analysis to the

aviation industry

- reliability maintenance -

by Gláucio Bastos, M.B.A., Ch.E.

Programa de Atualização Profissional

time between failure of air conditioning in a Boeing 737 fleet

months months months months months months

months months months months months months

Programa de Atualização Profissional historical and forecast

time between failure estimation is interesting for managers to

schedule properly preventive maintenance and maintain an

inventory of spare parts

months

time between failure of air conditioning in a Boeing 737 fleet

Programa de Atualização Profissional

identifying components responsible for failures

method 1

method 2

method 3

subsystem components

by method 3 - precise definition of contribution of each component

for the failure of aircraft subsystem

historical and forecast

Programa de Atualização Profissional

early identification of future failures

spectrum of the current signal of a motor

in good state (solid) and with defective

component (dotted)

The failure of a given component reduces the output torque capacity and increases the

vibration, and if not perceived can lead to catastrophic failure of the engine.

For example, the current spectrum typical of an engine in good condition has a main peak

at 50 Hz and secondary peaks at sidebands of 46 Hz and 54 Hz.

With the defective component the magnitude of the sideband peaks increases by a factor

of about 10 times, which can be detected in the spectrum.

Programa de Atualização Profissional

commercial benefits

o adding value and differentiation in preventive maintenance

contract with the client

o fostering extension of preventive maintenance contract with the

client for long term, by continuously receiving operational data for

monitoring to enable equipment performance evaluation