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Refer to figure.
The annex shows a Regulated Take-Off Weight (RTOW) table for runway 23L from take-off position VB. Use the data below to determine the RTOW for departure. For this question do NOT interpolate. Choose the most conservative figures at all times.

W/V: 230°/5 kt
Moderate rain
OAT: +12°C
QNH: 1015 hPa
Engine anti-ice: OFF
Packs: OFF
Quick line-up

  • A
    79 270 kg
  • B
    77 570 kg
  • C
    78 270 kg
  • D
    78 570 kg

Refer to figure.
A Regulated Take-Off Weight (RTOW) table is a simplified form of table to use and is produced for a specific aircraft type on a particular runway and shows MTOM and speeds for a variety of temperatures and pressure altitudes, sometimes giving different configuration options.

  • First of all, the wind direction 230o is exactly opposite to the runway 23L, so the wind speed of 5 kt is a headwind.
  • The questions asks to take the most conservative data and not interpolate, so, enter the RTOW table from the "0 kt" column.
  • The OAT is +12°C, for which there is no exact row, it is between +5°C and +15°C. The more conservative row is the higher temperature of +15°C.
  • The intersection between the "0 kt" column and "+15°C" row gives a RTOW of 78 000 kg.
  • Applying the correction "-430 kg" for the wet runway condition, due to the moderate rain, the RTOW for departure becomes: 78 000 kg - 430 kg = 77 570 kg.
  • No correction for pressures greater than 1013hPa is required.

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