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An air carrier B737 flight crew reacted to a GPWS 'terrain' warning while on a vector to avoid a thunderstorm. An approach control supervisor, apparently, told the reporter that this has happened before.
| Attributes | |
| ACN | 393347 |
| Time | |
| Date | 199802 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : oak |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 11000 flight time type : 11000 |
| ASRS Report | 393347 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Level at 5000 ft, vectors around thunderstorm, got a GPWS, told ATC (bay approach) I was climbing. Went up to 5500 ft, no GPWS. Got another vector wbound, descended to 5000 ft. ATC said that was a common occurrence in that area. I called and talked with supervisor. He said it had happened before, but since no other traffic in area, it was not a problem climbing.
Original NASA ASRS Text
Title: AN ACR B737 FLC REACTED TO A GPWS 'TERRAIN' WARNING WHILE ON A VECTOR TO AVOID A TSTM. AN APCH CTL SUPVR, APPARENTLY, TOLD THE RPTR THAT THIS HAS HAPPENED BEFORE.
Narrative: LEVEL AT 5000 FT, VECTORS AROUND TSTM, GOT A GPWS, TOLD ATC (BAY APCH) I WAS CLBING. WENT UP TO 5500 FT, NO GPWS. GOT ANOTHER VECTOR WBOUND, DSNDED TO 5000 FT. ATC SAID THAT WAS A COMMON OCCURRENCE IN THAT AREA. I CALLED AND TALKED WITH SUPVR. HE SAID IT HAD HAPPENED BEFORE, BUT SINCE NO OTHER TFC IN AREA, IT WAS NOT A PROB CLBING.
Data retrieved from NASA's ASRS site as of July 2007 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.