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An md super 80 on descent at 13000 ft initiates an escape maneuver due to a GPWS 'terrain' warning which later proved to be a false warning.
| Attributes | |
| ACN | 455513 |
| Time | |
| Date | 199911 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pdx.airport |
| State Reference | OR |
| Altitude | msl bound lower : 13000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 455513 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude |
| Independent Detector | aircraft equipment : gpws |
| Resolutory Action | controller : issued new clearance flight crew : took precautionary avoidance action |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
In night IMC, the aircraft GPWS sounded a 'terrain' warning. Captain initiated an escape maneuver, and we immediately climbed the aircraft to an altitude of 16000 ft. Portland approach was notified. They assured us we were clear of terrain and reclred for descent. The flight continued into pdx without further incident.
Original NASA ASRS Text
Title: AN MD SUPER 80 ON DSCNT AT 13000 FT INITIATES AN ESCAPE MANEUVER DUE TO A GPWS 'TERRAIN' WARNING WHICH LATER PROVED TO BE A FALSE WARNING.
Narrative: IN NIGHT IMC, THE ACFT GPWS SOUNDED A 'TERRAIN' WARNING. CAPT INITIATED AN ESCAPE MANEUVER, AND WE IMMEDIATELY CLBED THE ACFT TO AN ALT OF 16000 FT. PORTLAND APCH WAS NOTIFIED. THEY ASSURED US WE WERE CLR OF TERRAIN AND RECLRED FOR DSCNT. THE FLT CONTINUED INTO PDX WITHOUT FURTHER INCIDENT.
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.