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Flight crew of an large transport took escape action and climbed in response to a GPWS alert during radar descent vectoring above the minimum radar vectoring altitude.
| Attributes | |
| ACN | 332361 |
| Time | |
| Date | 199602 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bur |
| State Reference | CA |
| Altitude | msl bound lower : 5600 msl bound upper : 6800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bur |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | other other : other pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 1000 |
| ASRS Report | 332361 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : exited adverse environment |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
During approach to bur, we experienced a ground proximity warning system alerting us to terrain. Aircraft was under control of socal approach control. Airspeed 210 KTS, slats extended. Entered the clouds at 6000 ft MSL. 10 mi north of silex intersection on a southerly heading we were cleared from 6000 ft to 5000 ft MSL. While descending at 210 KTS at 1000 FPM we got a GPWS warning, 'terrain, terrain!' at 5700 ft MSL. Performed escape maneuver with maximum power and maximum pitch. Aircraft bottomed out at 5600 ft and we climbed to 6800 ft MSL. GPWS warning stopped climbing through 5800 ft MSL. Controller informed us 5000 ft was the minimum vectoring altitude for that area, but that there were a few peaks. We were subsequently reclred back to 5000 ft, 4000 ft, then 3000 ft incrementally, flew the ILS to runway 08 at bur and landed without incident. This was reminiscent of the accident in columbia in december 1995.
Original NASA ASRS Text
Title: FLC OF AN LGT TOOK ESCAPE ACTION AND CLBED IN RESPONSE TO A GPWS ALERT DURING RADAR DSCNT VECTORING ABOVE THE MINIMUM RADAR VECTORING ALT.
Narrative: DURING APCH TO BUR, WE EXPERIENCED A GND PROX WARNING SYS ALERTING US TO TERRAIN. ACFT WAS UNDER CTL OF SOCAL APCH CTL. AIRSPD 210 KTS, SLATS EXTENDED. ENTERED THE CLOUDS AT 6000 FT MSL. 10 MI N OF SILEX INTXN ON A SOUTHERLY HEADING WE WERE CLRED FROM 6000 FT TO 5000 FT MSL. WHILE DSNDING AT 210 KTS AT 1000 FPM WE GOT A GPWS WARNING, 'TERRAIN, TERRAIN!' AT 5700 FT MSL. PERFORMED ESCAPE MANEUVER WITH MAX PWR AND MAX PITCH. ACFT BOTTOMED OUT AT 5600 FT AND WE CLBED TO 6800 FT MSL. GPWS WARNING STOPPED CLBING THROUGH 5800 FT MSL. CTLR INFORMED US 5000 FT WAS THE MINIMUM VECTORING ALT FOR THAT AREA, BUT THAT THERE WERE A FEW PEAKS. WE WERE SUBSEQUENTLY RECLRED BACK TO 5000 FT, 4000 FT, THEN 3000 FT INCREMENTALLY, FLEW THE ILS TO RWY 08 AT BUR AND LANDED WITHOUT INCIDENT. THIS WAS REMINISCENT OF THE ACCIDENT IN COLUMBIA IN DECEMBER 1995.
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.