A321 first officer; as the pilot monitoring; reports a terrain warning during a night visual approac...

Narrative:

On the TYSSN3 RNAV arrival for the las ILS 25L approach. We were in [night] VMC with unlimited visibility. South of the localizer and the prino intersection; approach control asked us if we had the runway in sight. After confirming we had the runway in sight; approach cleared us for the visual. We initially went direct to shand and then direct relin. We had initially set 4;900 feet into the altitude alert and started a descent; I was expecting to level off at this altitude but realized that this was not going to occur. I verbally stated that we should level off at 4;900 feet but with the open descent mode selected we continued to descend. It was then that the autopilot was disengaged and a climb was initiated. At some point about that time we received a GPWS warning. We continued to climb and the warning stopped. Factors:1. Is was approximately xa:00 for us and the second leg with an origination in [the east]. This was the backside of the clock for us and fatigue was a big factor.2. With unlimited visibility we elected to take the visual when prompted by approach control; if not we would have just continued with the ILS. 3. The altitude alert was changed to 3;800 feet most likely when direct relin was entered. Probably due to fatigue; I missed the altitude change confirmation and the waypoint change confirmation.

Original NASA ASRS Text

Title: A321 First Officer; as the Pilot Monitoring; reports a terrain warning during a night visual approach to Runway 25L at LAS after arriving via the TYSSN3 and going direct RELIN.

Narrative: On the TYSSN3 RNAV arrival for the LAS ILS 25L approach. We were in [night] VMC with unlimited visibility. South of the localizer and the PRINO intersection; Approach Control asked us if we had the runway in sight. After confirming we had the runway in sight; Approach cleared us for the visual. We initially went direct to SHAND and then direct RELIN. We had initially set 4;900 feet into the altitude alert and started a descent; I was expecting to level off at this altitude but realized that this was not going to occur. I verbally stated that we should level off at 4;900 feet but with the open descent mode selected we continued to descend. It was then that the autopilot was disengaged and a climb was initiated. At some point about that time we received a GPWS warning. We continued to climb and the warning stopped. Factors:1. Is was approximately XA:00 for us and the second leg with an origination in [the east]. This was the backside of the clock for us and fatigue was a big factor.2. With unlimited visibility we elected to take the visual when prompted by approach control; if not we would have just continued with the ILS. 3. The altitude alert was changed to 3;800 feet most likely when direct RELIN was entered. Probably due to fatigue; I missed the altitude change confirmation and the waypoint change confirmation.

Data retrieved from NASA's ASRS site 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	1223528
Time
Date	201411
Local Time Of Day	1801-2400
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Direct Visual Approach STAR TYSSN3
Person 1
Function	First Officer Pilot Not Flying
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

A321 first officer; as the pilot monitoring; reports a terrain warning during a night visual approach to runway 25L at las after arriving via the TYSSN3 and going direct relin.