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both measured and corrected flight paths.
degrees
degrees Approach noise angle. The angle between the flight path and the noise path for approach operations. It is
identical for both measured and corrected flight paths.
EPNdB PNLT correction. The correction to be added to the EPNL calculated from measured data to account for noise
level changes due to differences in atmospheric absorption and noise path length between reference and test
conditions.
EPNdB Noise path duration correction. The correction to be added to the EPNL calculated fIom measured data to
account for noise level changes due to the noise duration because of differences in flyover altitude between
reference and test conditions.
EPNdB Mass correction. The correction to be added to the EPNL calculated !?om measured data to account for noise
level changes due to differences between maximum mass and actual mass of the test aeroplane.
EPNdB Approach angle correction. The correction to be added to the EPNL calculated !?om measured data to account
for noise level changes due to differences between thc rcfcrcnce and the test approach angles.
Take-offprofile changes. The algebraic changes in the basic parameters defining the take-off profile due to
differences between reference and test conditions.
AAB
Al3
2x
A&
metres
degrees
degrees
degrees
degrees
* Gear up, speed of at least V2 + 19 km/h (V2 + 10 kt), take-off thrust.
** Gear up, speed of at least V2 + 19 kmih (V, + 10 kt), after cutback.
6.2 Flight profile
identification positions
Position
G
G,
Description
Start of noise certification approach flight path.
Start of noise certification approach on reference flight
Position Description path.
Start of take-off roll.
Lift-off.
Start of first constant climb.
Start of thrust reduction.
Start of second constant climb.
Start of second constant climb on corrected flight path.
End of noise certification take-off flight path.
End of noise certification corrected take-off flight path.
Position on approach path directly above noise
measuring station.
Position on reference approach path directly above noise
measuring station.
Start of level-off.
Start of level-off on reference approach flight path.
Touchdown.
2411 1/05 APP 1-16
Appendix I Annex 16 - Environmental Protection
Position Description Distance
KR,
Unit
metres
Meaning
Flyover noise measurement point. Corrected take-off minimum distance. The
distance from station K to point R, on the
corrected flight path.
Lateral noise measurement point(s) (not on flight track).
End of noise certification take-off flight track.
Approach noise measllrement point.
Measured sideline noise path. The distance
from station L to the mcasurcd aeroplane
position X.
metres
Threshold of approach end of runway.
Start of noise certification approach flight track. Aeroplane approach height. The height of
the aeroplane above the approach measuring
station.
metres
(feet)
Position on measured take-off flight path corresponding
to apparent PNLTM at station K. See 9.2.
metres
(feet)
Reference approach height. The height of
the reference approach path above the
approach measuring station.
Position on corrected take-off flight path corresponding
to PNLTM at station K. See 9.2.
Position on measured take-off flight path nearest to
station K.
Measured approach noise path. The distance
from station N to the measured aeroplane
position S.
metres
Position on corrected take-off flight path nearest to
station K. Reference approach noise path. The distance
from station N to the reference aeroplane
position Sr .
metres
Position on measured approach flight path corresponding
to PNLTM at station N.
Measured approach minimum distance. The
distance from station N to point T on the
measured flight path.
Position on reference approach flight path corresponding metres
to PNLTM at station N.
Position on measured approach flight path nearest to
station N. Reference approach minimum distance. The
distance from station N to point Tr on the
corrected flight path.
metres
Position on reference approach flight path nearest to
station N.
metres Approach measurement distance. The
distance from the runway threshold to the
approach measurement station along the
extended centre line of the runway.
Position on measured take-off flight path corresponding
to PNLTM at station L.
Approachflight track distance. The distance
　
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