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An air carrier large transport climbed in response to a GPWS alarm. Altitude deviation altitude excursion.
| Attributes | |
| ACN | 230836 |
| Time | |
| Date | 199301 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 5100 msl bound upper : 5800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other |
| Route In Use | arrival other arrival star : star enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6500 flight time type : 300 |
| ASRS Report | 230836 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 18000 flight time type : 500 |
| ASRS Report | 230524 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were being vectored for VOR 12R. Were told to descend to 5100 ft MSL. At 5100 ft on a 250 degree heading, 25 wsw of sjc, GPWS 'pull-up' 'ground proximity' and aural warnings went off in cockpit. PF executed pull-up to 5800 ft. PNF advised ATC we were climbing. ATC said negative. We said we had to. ATC said terrain was not a problem. We leveled at 5800 ft. ATC advised to descend to 5100 ft and we complied. Bases of clouds were ragged and virga all around. This occurrence in IMC. Also ATC knew we were deviating because of terrain even though PNF made no mention of it.
Original NASA ASRS Text
Title: AN ACR LGT CLBED IN RESPONSE TO A GPWS ALARM. ALTDEV ALT EXCURSION.
Narrative: WE WERE BEING VECTORED FOR VOR 12R. WERE TOLD TO DSND TO 5100 FT MSL. AT 5100 FT ON A 250 DEG HDG, 25 WSW OF SJC, GPWS 'PULL-UP' 'GND PROX' AND AURAL WARNINGS WENT OFF IN COCKPIT. PF EXECUTED PULL-UP TO 5800 FT. PNF ADVISED ATC WE WERE CLBING. ATC SAID NEGATIVE. WE SAID WE HAD TO. ATC SAID TERRAIN WAS NOT A PROB. WE LEVELED AT 5800 FT. ATC ADVISED TO DSND TO 5100 FT AND WE COMPLIED. BASES OF CLOUDS WERE RAGGED AND VIRGA ALL AROUND. THIS OCCURRENCE IN IMC. ALSO ATC KNEW WE WERE DEVIATING BECAUSE OF TERRAIN EVEN THOUGH PNF MADE NO MENTION OF IT.
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.