PPRuNe Forums - View Single Post - Balanced/Unbalanced field length
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Old 6th March 2006 | 23:58
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john_tullamarine
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: ATPL
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From: various places .....
.. not wanting to be difficult but, as a practitioner (both in the sharp end and as an ops engineer), TODA=ASDA is, in effect, a useless definition.

TODA=ASDA has some significance to the civil engineer designing a runway .. I will refer this to Overrun to get his view ... but is of little interest to the pilot or ops engineer

TODR=ASDR is very pertinent to the operation.

As to whether the two definitions relate to each other will depend on the relative criticality of the runway to the aircraft. So, for instance, a 737 out of a 15000ft strip is not going to be interested .. whereas the 744 might be ..
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