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The flight crew of an air carrier inbound to oak reported an epgws warning near mt. Diablo when complying with an ATC issued a descend clearance to 5;000.
| Attributes | |
| ACN | 923949 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | NCT.TRACON |
| State Reference | CA |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 70 Flight Crew Total 16300 Flight Crew Type 3500 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Experience | Flight Crew Last 90 Days 170 Flight Crew Total 10000 Flight Crew Type 1000 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
Vectors over mt. Diablo leveling off at 5;000 ft. MSA is 5;100 ft in this area. Knew where the terrain was; but still received a 'terrain; terrain; pull up' warning from epgws. [We] executed the terrain avoidance maneuver. Climbed up to 5;600 ft and was in VMC at that point. Leveled off and told controller of our actions. Controller cleared us back to 5;000 ft clear of terrain. We descended and landed uneventfully.
Original NASA ASRS Text
Title: The Flight Crew of an Air Carrier inbound to OAK reported an EPGWS warning near Mt. Diablo when complying with an ATC issued a descend clearance to 5;000.
Narrative: Vectors over Mt. Diablo leveling off at 5;000 FT. MSA is 5;100 FT in this area. Knew where the terrain was; but still received a 'Terrain; Terrain; Pull Up' warning from EPGWS. [We] executed the terrain avoidance maneuver. Climbed up to 5;600 FT and was in VMC at that point. Leveled off and told Controller of our actions. Controller cleared us back to 5;000 FT clear of terrain. We descended and landed uneventfully.
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.