Trying to find a law (FAA/ICAO), if exists, about taking into account the PAPI or VASI when determining whether an approach is stabilzed.Every place I find talks about other references (ROD, Speed, Configuration, Check List etc.).Nothing about PAPI/VASI.
Heard someone mentioning that one can descent at a 1000fpm max ,have an all white VASI or PAPI, but still be considered as stabilzed when crossing the 1000 (IMC) or the 500 (VMC) mark.
Any opinions..?
In IMC, the PAPI and VASI aren't a factor, because they won't be seen until significantly after the point where a stabilized approach is required (generally 1000' AGL).
In VMC the PAPI or VASI may be used for further guidance, but the vertical speed allowed in a typical stabilized approach (2000 FPM from 2000-1000' AGL; 1000 FPM below 1000' AGL) will normally be more than that required for a 3 deg glide slope. Therefore, a "white PAPI" is acceptable if corrections are being made and/or a normal landing can be made from the approach. Otherwise, any pilot would have to go around any time he deviated above the glide slope (for the PAPI) or below the glide slope (for the regulations).
FWIW, I consider 40% N1 as the minimum acceptable for a "stabilized approach" in the 747 (GE CF6 engines).