Funny that...
Yesterday, I noticed an overflying B737 approaching Brisbane airport with it's landing lights flashing continually.
I live under the approach about 12nm from the airport, so I see quite a few airplanes, but this was the first one I've seen with flashing landing lights...I watched it for a minute or two, it was definitely the landing lights...they were reflected on the forward fuselage as it flew abeam my position.
Flashing on about every two seconds...
...never seen that before..
Cheers..FD...