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An operator shall ensure that the net take-off flight path clears all obstacles. The semi-width of the obstacle-corridor at the distance D from the end of the TODA, for an aircraft with a wingspan of less than 60 m, is at least…

  • A
    2x wingspan + 90 m + 0.125D
  • B
    1/2 wingspan + 90 m + 0.125D
  • C
    1/2 wingspan + 60 m + 0.125D
  • D
    2x wingspan + 60 m + 0.125D

Refer to figure.
OBSTACLE ACCOUNTABILITY AREA
Obstacles are considered if they lie in an area called the "Obstacle Accountability Area".
For aircraft with a wing span of less than 60m

  • semi width of such area is calculated: 60 m + 0.125 x D + ½ wingspan
    - If the flight path requires a change of track direction between 0 and 15 deg then the area reaches a maximum semi width of 300m;
    - If the flight path requires a change of track direction above 15 deg then the area reaches a maximum semi width of 600m.

For aircraft with a wing span of more than 60m

  • semi width of such area is calculated: 90 m + 0.125 × D

D = Horizontal distance travelled from the end of TODA or TOD.

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