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Refer to figure or CAP 698 Figure 4.28.
Given the following information

Estimated Landing Mass: 45000 kg
Aerodrome Pressure Altitude: 4000 ft
Flap setting: 30°
Runway: dry, no slope
Headwind Component: 20 kt
Anti skid: INOPERATIVE
Spoilers: AUTOMATIC
Air conditioning: AUTO

For a commercially operated turbo jet powered aeroplane Performance Class A, what is the field length?

  • A
    4250 ft
  • B
    6080 ft
  • C
    8162 ft
  • D
    7100 ft

Refer to figure.

Having anti-skid INOPERATIVE puts you in the right-hand PA grid, giving you an answer of around 7300 ft LDR.
No correction is required.

CLOSEST OPTION: 7100 ft

Note: there are 2 variants of this question, one where anti-skid is OPERATIVE and one with INOPERATIVE anti-skid.

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