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Widebody transport crew had a GPWS 'terrain,' followed by 'pull up terrain' aural warning while on an overwater approach. Aircraft was at 9000 ft at the time. Pilot followed warning and climbed to 10000 ft.
| Attributes | |
| ACN | 403083 |
| Time | |
| Date | 199805 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ch airport : hkg |
| State Reference | FO |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : hkg |
| 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 | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 5000 flight time type : 1500 |
| ASRS Report | 403083 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance 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 |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On a westerly vector south of ch VOR to begin the igs 13 approach to hong kong, we were instructed to descend from 9000 ft to 4500 ft and turn right to 060 degrees. As the descent began, we received an aural warning 'terrain.' that was followed by 'pull up terrain.' I didn't react to the initial terrain call as we were over water. When the second callout came I disconnected the autoplt and climbed to 10000 ft. We assumed we flew over traffic. We notified the controller of the GPWS maneuver and we were at 10000 ft. The controller acknowledged us and instructed us to continue descent to 4500 ft on a 060 degree heading to intercept the localizer. We made an uneventful landing on runway 13 at hong kong.
Original NASA ASRS Text
Title: WDB CREW HAD A GPWS 'TERRAIN,' FOLLOWED BY 'PULL UP TERRAIN' AURAL WARNING WHILE ON AN OVERWATER APCH. ACFT WAS AT 9000 FT AT THE TIME. PLT FOLLOWED WARNING AND CLBED TO 10000 FT.
Narrative: ON A WESTERLY VECTOR S OF CH VOR TO BEGIN THE IGS 13 APCH TO HONG KONG, WE WERE INSTRUCTED TO DSND FROM 9000 FT TO 4500 FT AND TURN R TO 060 DEGS. AS THE DSCNT BEGAN, WE RECEIVED AN AURAL WARNING 'TERRAIN.' THAT WAS FOLLOWED BY 'PULL UP TERRAIN.' I DIDN'T REACT TO THE INITIAL TERRAIN CALL AS WE WERE OVER WATER. WHEN THE SECOND CALLOUT CAME I DISCONNECTED THE AUTOPLT AND CLBED TO 10000 FT. WE ASSUMED WE FLEW OVER TFC. WE NOTIFIED THE CTLR OF THE GPWS MANEUVER AND WE WERE AT 10000 FT. THE CTLR ACKNOWLEDGED US AND INSTRUCTED US TO CONTINUE DSCNT TO 4500 FT ON A 060 DEG HDG TO INTERCEPT THE LOC. WE MADE AN UNEVENTFUL LNDG ON RWY 13 AT HONG KONG.
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.