An A320 on approach to boi runway 28R got a GPWS terrain warning. The flight crew reported that the ...

Narrative:

Planned and briefed localizer back course to runway 28L. When we switched to tower; they cleared us to land runway 28R. I got in the box to switch it to get the centerline fix to runway 28R. The airport and terrain were in sight. We began to descend to the centerline fix crossing altitude. As we descended; I saw the terrain out the window and brought up our close proximity to the first officer. Right after that; we received a gear not down ECAM. The airport was still approximately 6 miles away and I knew it was a terrain warning; so the first officer stopped and we put the gear down. At the same time as gear extension; we received a pull-up terrain GPWS. We were just cresting over the last part of the terrain and were in level flight so we continued on. We landed without event. I can see that our accepting a runway change at the last minute at nighttime could be a real issue at this airport. Additionally; switching to runway 28R brought us closer to the terrain.

Original NASA ASRS Text

Title: An A320 on approach to BOI Runway 28R got a GPWS terrain warning. The flight crew reported that the terrain seemed close and stated they would avoid future night approaches to that runway.

Narrative: Planned and briefed LOC back course to Runway 28L. When we switched to Tower; they cleared us to land Runway 28R. I got in the box to switch it to get the centerline fix to Runway 28R. The airport and terrain were in sight. We began to descend to the centerline fix crossing altitude. As we descended; I saw the terrain out the window and brought up our close proximity to the First Officer. Right after that; we received a gear not down ECAM. The airport was still approximately 6 miles away and I knew it was a terrain warning; so the First Officer stopped and we put the gear down. At the same time as gear extension; we received a pull-up terrain GPWS. We were just cresting over the last part of the terrain and were in level flight so we continued on. We landed without event. I can see that our accepting a runway change at the last minute at nighttime could be a real issue at this airport. Additionally; switching to Runway 28R brought us closer to the terrain.

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	824453
Time
Date	200902
Local Time Of Day	1801-2400
Place
Locale Reference	BOI.Airport
State Reference	ID
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Experience	Flight Crew Last 90 Days 180 Flight Crew Total 10889 Flight Crew Type 4300
Person 2
Function	First Officer Pilot Not Flying
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 12200 Flight Crew Type 2300
Events
Anomaly	Inflight Event / Encounter CFTT / CFIT

An A320 on approach to boi runway 28R got a GPWS terrain warning. The flight crew reported that the terrain seemed close and stated they would avoid future night approaches to that runway.