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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier flight crew receives a terrain warning from the GPWS while descending through 4700 ft for 4100 ft. The flight crew properly executed their evasive climb. The high terrain in the general vicinity is approximately 4049 ft at a tower.
| Attributes | |
| ACN | 329549 |
| Time | |
| Date | 199602 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 4700 msl bound upper : 4800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 329549 |
| 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 : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
When vectored 10 degrees right of the jawws arrival abeam morgan hill out of 5000 ft for the assigned altitude of 4100 ft, the GPWS noted terrain. Warning occurred out of 4700 ft. Climbed through 4800 ft to silence warning. Approach was informed of altitude deviation to which their reply was that the warnings are occurring more often recently for no reason.
Original NASA ASRS Text
Title: AN ACR FLC RECEIVES A TERRAIN WARNING FROM THE GPWS WHILE DSNDING THROUGH 4700 FT FOR 4100 FT. THE FLC PROPERLY EXECUTED THEIR EVASIVE CLB. THE HIGH TERRAIN IN THE GENERAL VICINITY IS APPROX 4049 FT AT A TWR.
Narrative: WHEN VECTORED 10 DEGS R OF THE JAWWS ARR ABEAM MORGAN HILL OUT OF 5000 FT FOR THE ASSIGNED ALT OF 4100 FT, THE GPWS NOTED TERRAIN. WARNING OCCURRED OUT OF 4700 FT. CLBED THROUGH 4800 FT TO SILENCE WARNING. APCH WAS INFORMED OF ALTDEV TO WHICH THEIR REPLY WAS THAT THE WARNINGS ARE OCCURRING MORE OFTEN RECENTLY FOR NO REASON.
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.