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An air carrier flight crew reported an egpws aural obstacle alert on final to dal runway 31L during visual approach with the ILS glideslope out of service. The alert ceased immediately after initiating the terrain clearance maneuver.
| Attributes | |
| ACN | 1380412 |
| Time | |
| Date | 201608 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | DAL.Airport |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 232 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 174 Flight Crew Total 20000 |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
The glideslope was out on runway 31L at dal. We were using LNAV on the visual to 31L at dal when we received 'obstacle'; but did not receive a 'pull up' or 'caution' only 'obstacle'. We initiated the terrain avoidance maneuver which simultaneously stopped the aural warning. Visual approach was continued and completed normally. Conditions were day VMC and downtown buildings were always in sight. The glideslope was inoperative but VNAV was used as a reference. We were always above the glideslope and FAF. Apparently the clearance given to us 'direct to takid' which was the FAF for 31L and a slight descent triggered the initial start of the warning. The warning was so momentary that a full warning was not issued.
Original NASA ASRS Text
Title: An air carrier flight crew reported an EGPWS aural OBSTACLE alert on final to DAL Runway 31L during visual approach with the ILS glideslope out of service. The alert ceased immediately after initiating the terrain clearance maneuver.
Narrative: The glideslope was out on Runway 31L at DAL. We were using LNAV on the Visual to 31L at DAL when we received 'Obstacle'; but did not receive a 'Pull Up' or 'Caution' only 'Obstacle'. We initiated the Terrain Avoidance Maneuver which simultaneously stopped the aural warning. Visual approach was continued and completed normally. Conditions were day VMC and downtown buildings were always in sight. The glideslope was inoperative but VNAV was used as a reference. We were always above the glideslope and FAF. Apparently the clearance given to us 'Direct to TAKID' which was the FAF for 31L and a slight descent triggered the initial start of the warning. The warning was so momentary that a full warning was not issued.
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.