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4) the identity of displayed pages for emergency procedures and checklists;
b) retardation information including brake application for use in the investigation of landing overruns and rejected take-offs; and
c) additional engine parameters (EPR, N,, EGT, fuel flow, etc.).
ATT D-6
ATTACHMENT E. EXTENDED RANGE OPERATIONS BY AEROPLANES
WITH TWO TURBINE POWER-UNITS
Supplementary to Chapter 4, 4.7
1. Purpose and scope
1.1 Introduction
The purpose of this Attachment is to give guidance on the
value of the threshold time which is to be established in
compliance with Chapter 4, 4.7.1 and also to give guidance on
the means of achieving the required level of safety envisaged
by Chapter 4, 4.7.2 where operations beyond the established
threshold are approved.
1.2 Threshold time
It should be understood that the threshold time established in
accordance with Chapter 4, 4.7.1 is not an operating limit, but
is a flight time from an adequate en-route alternate aerodrome
beyond which the State of the Operator must give particular
consideration to the aeroplane and the operation before
granting authorization. Pending the acquisition of additional
data for such operations by twin-engined commercial transport
aeroplanes and taking into account the level of safety intended
by Chapter 4, 4.7.2, it is suggested that the threshold time be
60 minutes.
1.3 Basic concepts
In order to maintain the required level of safety on routes
where an aeroplane with two power-units is permitted to
operate beyond the threshold time, it is necessary that:
a) the airworthiness certification of the aeroplane type
specifically permits operations beyond the threshold
time, taking into account the aeroplane system design
and reliability aspects;
2. Glossary of terms
Where the following terms are used in this Attachment, they
have the meaning indicated:
Adequate alternate aerodrome. An adequate alternate
aerodrome is one at which the landing performance
requirements can be met and which is expected to be
available, if required, and which has the necessary facilities
and services, such as air traffic control, lighting, communications,
meteorological services, navigation aids, rescue
and fire-fighting services and one suitable instrument
approach procedure.
Aeroplane system. An aeroplane system includes all elements
of equipment necessary for the control and performance of
a particular major function. It includes both the equipment
specifically provided for the function in question and other
basic related aeroplane equipment such as that required
to supply power for the equipment operation. As used
herein the power-unit is not considered to be an aeroplane
system.
Extended range operation. Any flight by an aeroplane with
two turbine power-units where the flight time at the one
power-unit inoperative cruise speed (in ISA and still air
conditions), from a point on the route to an adequate
alternate aerodrome, is greater than the threshold time
approved by the State of the Operator.
Power-unit. A system consisting of an engine and all ancillary
parts installed on the engine prior to installation on the
aeroplane to provide and control powerlthrust and for the
extraction of energy for aeroplane systems, but not
including independent short-period thrust-producing
devices.
b) the reliability of the propulsion system is such that the Propulsion system. A system consisting of a power-unit and
risk of double power-unit failure from independent all other equipment utilized to provide those functions
causes is extremely remote; necessary to sustain, monitor and control the powerlthrust
output of any one power-unit following installation on the
c) any necessary special maintenance requirements are airframe.
fulfilled;
d) specific flight dispatch requirements are met; Suitable alternate aerodrome. A suitable alternate aerodrome
is an adequate aerodrome where, for the anticipated time of
e) necessary in-flight operational procedures are use, weather reports, or forecasts, or any combination
established; and thereof, indicate that the weather conditions will be at or
above the required aerodrome operating minima, and the
f) specific operational authorization is granted by the State runway surface condition reports indicate that a safe
of the Operator. landing will be possible.
ANNEX 6 - PART I ATT E-1 1/11/01
Annex 6 - Operation of Aircraft
3. Airworthiness certification requirements
for extended range operations
During the airworthiness certification procedure for an
aeroplane type intended for extended range operations, special
　
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