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An air carrier flight crew responded to an egpws terrain warning while being vectored for an ILS runway 12 approach to bzn.
| Attributes | |
| ACN | 1161053 |
| Time | |
| Date | 201403 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | BZN.Airport |
| State Reference | MT |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | Airbus Industrie Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPWS |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 40 Flight Crew Total 17000 Flight Crew Type 1200 |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 20000 Flight Crew Type 5000 |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Inflight Event / Encounter CFTT / CFIT |
Narrative:
On vectors from big sky approach for ILS12; [I was] told to expect kicdo. We were level at 11;000 left downwind east of bzn airport. No terrain displayed on navigation display between our position and kicdo. Terrain had been briefed prior to approach and we were aware of terrain to east of airport with a height of 9;541 ft. While level at assigned altitude of 11;000 we received a GPWS terrain; terrain pull up warning. GPWS escape maneuver followed immediately. Warning ceased and level off completed at 12;000. ATC notified and we were told MVA is 10;900 ft for that area. We were then given a descent back down to 11;000 and continued to be vectored for the ILS12 approach. [I] called big sky approach supervisor to discuss event. He was able to pull up our radar track and verified the MVA in that sector was 10;900 ft and that other aircraft had been vectored in that same area without incident.
Original NASA ASRS Text
Title: An air carrier flight crew responded to an EGPWS terrain warning while being vectored for an ILS Runway 12 approach to BZN.
Narrative: On vectors from Big Sky approach for ILS12; [I was] told to expect KICDO. We were level at 11;000 left downwind east of BZN airport. No terrain displayed on NAV display between our position and KICDO. Terrain had been briefed prior to approach and we were aware of terrain to east of airport with a height of 9;541 FT. While level at assigned altitude of 11;000 we received a GPWS Terrain; Terrain pull up warning. GPWS ESCAPE maneuver followed immediately. Warning ceased and level off completed at 12;000. ATC notified and we were told MVA is 10;900 FT for that area. We were then given a descent back down to 11;000 and continued to be vectored for the ILS12 approach. [I] called Big Sky Approach Supervisor to discuss event. He was able to pull up our radar track and verified the MVA in that sector was 10;900 FT and that other aircraft had been vectored in that same area without incident.
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.