Landing distance required for return to departure

[SFI145]

JAR 1.515 requires the 60% rule for landing distances to be applied for the destination and any alternate airport. My question is does this include the departure point in the case of an emergency return?

[Pugilistic Animus]

In an emergency usually if you can TO if you could also land reasonably well---

because most Air regulation ---allow the PIC to deviate from legal requirements---[I]To the extent neccesary---to face that emergency----so LDR---requirements shouldn't matter---in fact in USA regulations---part 91 LDR--is written such that it includes no margin--although sensible pilots leave a margin;)---although FAR 25 ships operated under air carrier rules don't usually publish such data--it's easy to calculate---although it's like apples and oranges it is comforting to know you do have a rather large 'emergency' margin available----but you'd better have bona fide emergency---


PA