User manual

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• all engines operative, cabin depressurisation
• one engine inoperative, no cabin depressurisation
• one engine inoperative, cabin depressurisation.
The ETP is therefore the point from which each flying time is measured.
The flight time between pairs of ETOPS alternate airports is unimpor-
tant, so long as distance to reach from the ETP is not greater than that
allowed by the ETOPS type approval, the ETOPS operational certifica-
tion, and of the fuel be-ing carried.
PFPX also allows calculating an ‘unbalanced’ ETOPS solution using a
single airport. Instead of an Equal Time Point (ETP) a Critical Point (CRP)
is calculated. The CRP is the point requiring the highest diversion fuel.
Depending on the ETOPS scenario and the planned route either an
ETOPS solution with ETPs or CRPs may be more favourable.
Acknowledgements and
Thanks
We would like to acknowledge the help, advice and support of our beta
testing group involved in the systems testing, without their hard work
and co-operation our efforts to develop PFPX would not have borne
fruit. Special thanks to:
Richard McDonald Woods for the development of this manual
Judith Blaschegg for adapting this manual
Douglas Snow, Gary McGinnis and Carsten Raum for his technical ad-
vice and support
Copyright
This document may only be used in conjunction with a copy of the Pro-
fessional Flight Planner X program. The user is not granted permission
to copy and/or modify this document except in pursuance of personal
use of the licensed program.