An air carrier crew reported an EGPWS TERRAIN; PULL UP warning at about 11;000 FT while flying the UIO/SEQU RNAV Runway 35 arrival night in visual conditions. The arrival was continued without evasive maneuvering.

Narrative

This report is in reference to flight to OIU/SEQU. During approach into UIO we got a momentary 'TERRAIN; TERRAIN; PULL UP' alert. We were just inside DEVAS (FAF) descending on the RNAV (RNP) approach to Runway 35. At the time the weather was good. There was a scattered deck at about 13000 FT; excellent visibility; and a nearly full moon up in the sky. We had descended below the scattered cloud deck and had good visual on the runway and the ground below when we got the alert. We were at about 11000 FT. The PAPI's were showing white over white and the glideslope pointer for the ILS was showing above glideslope. I could see the ground because of the bright moon. I am not sure if there might have been a small map shift; I had the smallest scale setting (10 miles); and everything seemed normal; but I was mostly visual outside at this time. We were doing about 150 KTS; slowing; which might account for the warning. We elected to continue because; again; we seemed to be in a normal position for this approach; good visual on the runway and runway environment; and high in glideslope. This is also normal for this approach when inside the final approach fix. It was just a momentary alert and the rest of the approach and landing were uneventful.