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Flight Operations TECHNICAL CIRCULAR A330 Control No: TC-12-004 Issue date: 01 Aug 2012

Effective date: 01 Aug 2012

Expiry date: 31 Jan 2013

Subject: Flight Plan Optimization and Fuel Conservation

REASON FOR ISSUE: As HKA is now operating to destinations with a flying time in excess of 5 hours, we have reviewed the methodology and flight planning process in order to maximize the aircraft performance and fuel conservation. In the same instance, we are closely monitoring both the data supplied by dispatch services and the end of flight data, for example, Fuel Used, deviations of Flight Levels flown versus Flight Levels on the CFP’s. As a result, figures will be used for future performance calibrations of flight planning regimes, statistical data at HKA and Carbon Emission Control Offsets.

OPERATIONAL OVERVIEW: All our CFP’s are optimized using the latest meteorological data available before the commencement of a flight; in addition, engineering parameters/aircraft performance data is also a factor. We entice the insertion of Cruise Winds, Temperatures and Step-Climbs in the flight management system for accurate FMS predications and accurate Optimum Altitude Predications; this can then be compared to the CFP as a comparison of data. Regarding the cruise winds, we would recommend using the levels available on the CFP, for example, FL300, FL340, FL390, FL410 as detailed below, the flight crew should modify the entered winds and temperatures in flight, if a significant difference is expected (greater than 30 kts or 30° for the wind data and greater than 5°C for the temperature).

A330 TC-12-004 / Page 1 of 3


An extract of the wind and temperature data follows as an illustrative example, where, the highlighted waypoints are used for wind data/temperature insertion in to the FMS; The CFP extract below is of standard format provided by Jeppesen Dispatch i.e. for HKG-LGW-HKG

CLN ARTOV REDFA TULIP SPY BETUS ANDIK KEKIX GRONY BEDUM

10000 3327M07 3230M08 3231M09 3231M10 3130M11 3129M12 3130M12 3130M12 3130M13 3030M13

30000 0284M47 0186M47 0183M47 0079M47 3574M48 3571M48 3468M48 3467M48 3462M48 3457M47

34000 5201M54 5100M54 0194M54 0084M53 0074M52 3568M52 3565M51 3564M51 3459M51 3453M50

39000 0164M57 0162M56 0059M55 0053M53 3546M52 3443M51 3443M51 3443M50 3442M50 3440M50

41000 0153M56 0052M55 0050M55 3546M53 3441M52 3439M51 3439M51 3439M51 3438M51 3337M50

EKETA TYN EGEBI SQ PADNO ASABU DUBAG CGO KAMDA

2915M02 2813M02 2812M02 2812M02 2812M02 2911M02 2911M02 2912M02 2813M02

3031M49 2947M47 2961M45 2889M43 2899M42 7800M41 7803M41 2899M41 2889M41

2956M54 2971M53 2982M52 7801M51 7807M51 7805M51 7805M51 7803M50 2897M50

2873M58 2882M57 2889M57 7800M58 7805M58 7709M58 7713M58 7716M58 7718M59

2874M58 2885M58 2894M58 2899M59 7804M59 7708M59 7712M59 7713M59 7715M60

There have been reports from crews that the wind information on the CFP has a wind direction and speed with peculiar series of digits, for example; EGEBI SQ PADNO ASABU DUBAG CGO KAMDA OBLIK

2812M02 2812M02 2812M02 2911M02 2911M02 2912M02 2813M02 2812M02

2961M45 2889M43 2899M42 7800M41 7803M41 2899M41 2889M41 2883M39

2982M52 7801M51 7807M51 7805M51 7805M51 7803M50 2897M50 2795M49

2889M57 7800M58 7805M58 7709M58 7713M58 7716M58 7718M59 7713M58

2894M58 2899M59 7804M59 7708M59 7712M59 7713M59 7715M60 7710M61

Wind speeds over 99 knots are decoded by subtracting 50 from the direction and adding 100 to the speed. For Example: SQ at FL340: 7801M51 means you subtract 50 from the wind direction 78 to equal 28 or 280; and add 100 to 01 for the speed to equal 101kts; M51 is minus 51â °C for the temperature.

A330 TC-12-004 / Page 2 of 3


The CFP extract below is of standard format provided by Hainan Dispatch ZHO

F380 28/063 M59 F240 29/039 M31

F340 29/054 M54 F180 28/035 M17

F300 29/046 M46 F100 28/022 POO

AKOMA

F380 28/066 M60 F240 29/044 M32

F340 29/060 M56 F180 28/035 Ml7

F300 29/053 M47 FlOO 28/023 MOl

WXI

F380 28/070 M62 F240 29/050 M33

F340 29/067 M56 F180 28/037 Ml8

F300 29/061 M47 F100 28/023 M02

•

If the predicted altitude lies between two altitudes entered on the CRUISE WIND page,

-

The wind direction and velocity are linearly interpolated.

•

If the predicted altitude is above or below the set of CRUISE altitudes,

-

The forecasted wind is a constant value extrapolated from the entered or propagated wind at the highest (or lowest) altitude displayed on the CRZ WIND page for that waypoint.

In addition to the Cruise winds the Descent Profile requires certain data; Crews are urged to enter as many as one wind at 5 different FL/Altitudes. This wind data will be used for descent profile and prediction computation. Expanded details can be found on in FCOM DSC-22 20-30-20-28

REFERENCES: FCOM PRO-NOR-SOP FCOM DSC 22

A330 TC-12-004 / Page 3 of 3

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