The TAF posted earlier in this thread gave the viz as 9999. There was also an eye-witness report from someone watching the aircraft approach who said that it 'veered away'. However, the eyewitness might have been confused by the commencement of the teardrop turn on the HA NDB rather than just before touchdown.
Surplus 1:
I raised that point very early in this thread. Very real possibility as you say.
To others who have actually flown the approach to 20, I wonder why it has to be so complex. Wouldn't an approach similar to (the now closed) Kai Tak 13 be easier? Fly inbound at something like 130 until the HAI VOR is 2 miles DME bearing (say) 170 and commence the turn keeping the 2 bright lights on the left as you do now (i.e. For the Kai Tak Checkerboad substitute the lights)
Here is a drawing of what I mean.
