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B757-200 with nct on vectors to oak runway 11 experienced GPWS event while descending to 5000 as per ATC clearance.
| Attributes | |
| ACN | 766355 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | navaid : oak.vortac |
| State Reference | CA |
| Altitude | msl single value : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Rain |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : nct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 1l |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 757 |
| ASRS Report | 766355 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment : gpws other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | FAA Aircraft |
| Primary Problem | Aircraft |
Narrative:
We were in level flight at 5000 ft; speed assigned 230 KTS; being vectored for the ILS runway 11. We received an epgws warning of 'terrain; terrain; pull up; pull up.' I took control of the aircraft and executed the CFIT maneuver. The warning stopped passing through 5500 ft. I advised ATC that we were climbing in response to a terrain warning and leveled at 6000 ft. The controller replied casually 'yea; that's mt diablo' and gave us a descent to 5000 ft. After the event the first officer told me he saw the RA indicator 2300 ft and decreasing. I don't know what the lowest RA indicated.
Original NASA ASRS Text
Title: B757-200 WITH NCT ON VECTORS TO OAK RWY 11 EXPERIENCED GPWS EVENT WHILE DESCENDING TO 5000 AS PER ATC CLRNC.
Narrative: WE WERE IN LEVEL FLT AT 5000 FT; SPD ASSIGNED 230 KTS; BEING VECTORED FOR THE ILS RWY 11. WE RECEIVED AN EPGWS WARNING OF 'TERRAIN; TERRAIN; PULL UP; PULL UP.' I TOOK CTL OF THE ACFT AND EXECUTED THE CFIT MANEUVER. THE WARNING STOPPED PASSING THROUGH 5500 FT. I ADVISED ATC THAT WE WERE CLBING IN RESPONSE TO A TERRAIN WARNING AND LEVELED AT 6000 FT. THE CTLR REPLIED CASUALLY 'YEA; THAT'S MT DIABLO' AND GAVE US A DSCNT TO 5000 FT. AFTER THE EVENT THE FO TOLD ME HE SAW THE RA INDICATOR 2300 FT AND DECREASING. I DON'T KNOW WHAT THE LOWEST RA INDICATED.
Data retrieved from NASA's ASRS site as of January 2009 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.