An air carrier crew reported an egpws terrain; pull up warning at about 11;000 ft while flying the u...

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.

Original NASA ASRS Text

Title: 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.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	871792
Time
Date	201001
Local Time Of Day	1801-2400
Place
Locale Reference	SEQU.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	GPWS
Person 1
Function	First Officer Pilot Not Flying
Person 2
Function	Captain Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

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.