5 / 20

Refer to figure or CAP 758 Figure 3.43.
Given the following information, determine the distance D3 of Segment 3 for the TETH to accelerate from VTOSS to VY:

Pressure Altitude: 8 000 ft
OAT: 0°C
Take-off Mass: 7 000 kg
Wind: 20 kt Headwind

  • A

    280 m or 900 ft

  • B

    250 m or 750 ft

  • C

    300 m or 1 000 ft

  • D

    1 000 m or 3 000 ft

Refer to figures.
From figure 3.43, the Distance D3 (3rd segment) can be determined with the helicopter flying with OEI, landing gear retracted and accelerating from VTOSS to VY at 200 ft above the take-off surface for a given pressure altitude, temperature, take-off mass and wind conditions.

To determine the Distance D3 proceed with the following manner:

  • Enter with the pressure altitude 8 000 ft from the top left graph and move vertically up until OAT +0°C.
  • Continue horizontally to the right until the take-off mass line 7 000 kg.
  • Move vertically down until the 20 kt headwind component line.
  • From this point, continue horizontally to the left, intersect the REF LINE and move vertically down to read the Distance D3: 280 m or 900 ft.

NOTE:
According to EASA AIR OPS - CAT.POL.H.105 - General, accountability for wind shall be no more than 50% of any reported steady headwind component of 5 kt or more. But, CAP 758 is under JAR OPS and does not take into account the 50% factor for the reported headwind component. In case this or a similar question is met at your exams, please leave your feedback.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.