pilotsaab
The procedure is 20 secs per 500' AGL, corrected for wind. If 10kts tailwind component on the downwind, remove 10 secs from your timing. Flying downwind at the circling minima (860' AGL), when you get abeam the threshold start your stopwatch, fly for 25secs and turn base. Your config should be Gear down & Flap 3.
7 miles is way too far downwind.
If this is a accident whilst circling it bears so much similarity with the
Air China B767 crash at Pusan, Korea