Landing Distance Required

[arrow28]

Hi everyone,

Have just been reading CAO 20.7.1b in regards to landing distance requirements for dry and wet runways. Are the distances in the flight manuals factored already or must you re-calculate these before using them. ie distance increase by 1.67

Do these distances include anti-skid and lift dumpers. For example if thrust reverers are inoperative, does the landing distance required need to be increased.

Where would I find the list of systems that are included or required for the landing distance before an increase is made.

Hope this makes sense :confused:

Cheers A28

[Anthill]

The LD in the flight manual is usually unfactored. There will be an annotation in the Flight Manual which decribes the basisfor which the distance is calculated. It is usually for 50' to a full stop.

Corrections for braking aids are also in the flight manual performance section. In Boeing aircraft, these are also found in the QRH.

CAO 20.7.1B distances refer to distances required at the Planning stage. What you do in-flight is your own business (buffers of 1.67 and 1.92 don't apply, but you would be mad not to apply some safety factor).

[AerocatS2A]

Reverse thrust is not normally accounted for.

I think you'd be mad not to use full safety factors in flight unless you had an emergency of some sort.

If you did have an equipment failure the abnormal checklist would give information on landing distance required.

[waren9]

Have just been reading CAO 20.7.1b in regards to landing distance requirements for dry and wet runways. Are the distances in the flight manuals factored already both or must you re-calculate these before using them. no ie distance increase by 1.67

Do these distances include anti-skid and lift dumpers. For example if thrust reverers are inoperative, does the landing distance required need to be increased.

In flight failures leading to a landing with some equipment inoperative only requires consideration of actual landing distance (given the nature of the failure) versus landing distance available.

QRH or ECAM will provide the information necessary to calculate actual landing distance with that failure. Increments for weight, height above MSL, runway condition (wet, dry, snow etc), flap setting, tailwind, reversers operative, auto brake setting etc etc are also provided.

Given that not all of us are ex military test pilots, some sort of additive is not a bad thing. How much is a matter of whats available, the urgency to land and your own ability.

As opposed to

Departing with inoperative equipment (e.g. anti skid inop) where you still need to factor the actual landing distance (with that failure) factored by 1.67 or whatever 20.7.1 requires.