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Medium large transport flight crew has GPWS active during descent. Climbs until warning is silenced then returns to cleared altitude. Approach a crossing restr which is not possible on the approach.
| Attributes | |
| ACN | 355265 |
| Time | |
| Date | 199612 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : oak |
| State Reference | CA |
| Altitude | msl bound lower : 1800 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| 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 : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 300 flight time total : 10000 flight time type : 5000 |
| ASRS Report | 355265 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : exited adverse environment none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Bay approach cleared us to descend from 6000 ft to 5000 ft. At 5400 ft, GPWS 'terrain, terrain' and 'pull up' sounded. We climbed to 5850 ft and it silenced. Bay approach was advised. We descended back to 5000 ft without incident. Then bay cleared us for the ILS runway 11 at oak, saying 'turn right to 110 degrees, maintain 2500 ft till established, cleared to ILS runway 11, tower 127.2 at plaza.' we intercepted the localizer approximately a half mi west of plaza, at which point bay said, 'cross plaza at or below 1800 ft.' we were unable. We crossed plaza at 2100 ft. Why did this happen? Could we have been given the plaza restr sooner? (The approach chart says it's mandatory for the localizer approach, not ILS.)
Original NASA ASRS Text
Title: MLG FLC HAS GPWS ACTIVE DURING DSCNT. CLBS UNTIL WARNING IS SILENCED THEN RETURNS TO CLRED ALT. APCH A XING RESTR WHICH IS NOT POSSIBLE ON THE APCH.
Narrative: BAY APCH CLRED US TO DSND FROM 6000 FT TO 5000 FT. AT 5400 FT, GPWS 'TERRAIN, TERRAIN' AND 'PULL UP' SOUNDED. WE CLBED TO 5850 FT AND IT SILENCED. BAY APCH WAS ADVISED. WE DSNDED BACK TO 5000 FT WITHOUT INCIDENT. THEN BAY CLRED US FOR THE ILS RWY 11 AT OAK, SAYING 'TURN R TO 110 DEGS, MAINTAIN 2500 FT TILL ESTABLISHED, CLRED TO ILS RWY 11, TWR 127.2 AT PLAZA.' WE INTERCEPTED THE LOC APPROX A HALF MI W OF PLAZA, AT WHICH POINT BAY SAID, 'CROSS PLAZA AT OR BELOW 1800 FT.' WE WERE UNABLE. WE CROSSED PLAZA AT 2100 FT. WHY DID THIS HAPPEN? COULD WE HAVE BEEN GIVEN THE PLAZA RESTR SOONER? (THE APCH CHART SAYS IT'S MANDATORY FOR THE LOC APCH, NOT ILS.)
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.