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B737 captain experiences a predictive windshear alert at low altitude during approach in VMC and goes around. System malfunction is suspected.
| Attributes | |
| ACN | 926015 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | BOS.Airport |
| State Reference | MA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPWS |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 195 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
We were approximately 300-400 ft AGL on a visual approach to runway 22L at boston logan international when we received a warning from the aircraft's predictive windshear system: 'go around; windshear ahead; windshear ahead.' the pilot flying correctly initiated a normal go-around while I simultaneously called 'go around.' on the go around; a radar test pattern came up on both our inboard display units. Throughout the flight; both of us had 'terrain' selected. The ride on approach was smooth and the winds were steady with no reports of gusts. In my opinion; the predictive windshear warning we encountered was erroneous. No indications of windshear were seen at any time. We did not use the weather radar at any time during the flight and all the preflight systems checks were normal.
Original NASA ASRS Text
Title: B737 Captain experiences a predictive windshear alert at low altitude during approach in VMC and goes around. System malfunction is suspected.
Narrative: We were approximately 300-400 FT AGL on a visual approach to Runway 22L at Boston Logan International when we received a warning from the aircraft's predictive windshear system: 'Go around; windshear ahead; windshear ahead.' The pilot flying correctly initiated a normal go-around while I simultaneously called 'go around.' On the go around; a radar test pattern came up on both our inboard display units. Throughout the flight; both of us had 'terrain' selected. The ride on approach was smooth and the winds were steady with no reports of gusts. In my opinion; the predictive windshear warning we encountered was erroneous. No indications of windshear were seen at any time. We did not use the weather radar at any time during the flight and all the preflight systems checks were normal.
Data retrieved from NASA's ASRS site as of April 2012 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.