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Air carrier flight crew reported they received a GPWS alert even though they were descending to an appropriate assigned altitude.
| Attributes | |
| ACN | 1729151 |
| Time | |
| Date | 202002 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | AVP.Airport |
| State Reference | PA |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter CFTT / CFIT |
Narrative:
Approach cleared our aircraft to 3;700 feet and gave us a heading to intercept the final approach course. Within 3 miles of intercepting the final approach course our aircraft ground proximity warning system alerted us to a terrain awareness event. Immediately the captain performed the proper evasive maneuvering by increasing aircraft engines to max power and pitching up to achieve a high rate of climb to avoid any and all terrain. Immediately the terrain warning was silenced we contacted approach and they informed us that I was at a safe minimum altitude and that I should not have received any terrain warning. We did notice however after debriefing with the captain that while we were in IMC we crossed over a steep sloping ridge which may have triggered the alert. We believe the ground proximity warning system event was caused by a steep slope in ridge that the aircraft was passing over while intercepting the final approach course. The aircraft was in no eminent danger and evasive maneuvering was taken as a precaution. We do not believe that there is any correct action that should be taken. Approach could possibly make pilots aware of the steep sloping in terrain while vectoring to final if the aircraft is in IMC.
Original NASA ASRS Text
Title: Air carrier Flight Crew reported they received a GPWS alert even though they were descending to an appropriate assigned altitude.
Narrative: Approach cleared our aircraft to 3;700 feet and gave us a heading to intercept the final approach course. Within 3 miles of intercepting the final approach course our aircraft ground proximity warning system alerted us to a terrain awareness event. Immediately the Captain performed the proper evasive maneuvering by increasing aircraft engines to max power and pitching up to achieve a high rate of climb to avoid any and all terrain. Immediately the terrain warning was silenced we contacted Approach and they informed us that I was at a safe minimum altitude and that I should not have received any terrain warning. We did notice however after debriefing with the Captain that while we were in IMC we crossed over a steep sloping ridge which may have triggered the alert. We believe the ground proximity warning system event was caused by a steep slope in ridge that the aircraft was passing over while intercepting the final approach course. The aircraft was in no eminent danger and evasive maneuvering was taken as a precaution. We do not believe that there is any correct action that should be taken. Approach could possibly make pilots aware of the steep sloping in terrain while vectoring to final if the aircraft is in IMC.
Data retrieved from NASA's ASRS site 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.