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B757 flight crew reported a flap overspeed and several flight director malfunctions during a go around after a faulty predictive windshear warning.
| Attributes | |
| ACN | 1516704 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Weather Radar |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 36 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 902 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
I was hand flying the airplane for landing. At 200 ft AGL on a stabilized approach in VMC; calm winds; and no convective activity nearby. The airplane announced and displayed 'go around wind shear'. Per SOP; I executed go around. While complying with ATC heading and altitude instructions; flap setting 5 was oversped to 225kts for about 30 seconds. The GA (go around) button on thrust lever was pushed several times but FMA (flight mode annunciator) would not change from GS and localizer. At 400 ft heading select was called for and pushed. No FMA change. I missed the flch (flight level change) call and speed. The fds (flight directors) were switched off and on; the FMA changed and ap (auto pilot) was engaged during the overspeed event. The GA procedure was not completed correctly and I was overly focused on the FMA not changing to heading which distracted me from speed monitoring. After the flaps were up and the after takeoff checklist was completed; the airplane accelerated to about 280kts at 3500 feet for about 20 seconds while climbing from initial tower directed level off of 2;000 ft to 5;000 ft. ATC made no mention of the situation. The airplane was landed normally with no further issues. At the gate; the issue of the flap 5 overspeed and the pws (probably wind shear) false alert were logged for maintenance.
Original NASA ASRS Text
Title: B757 flight crew reported a flap overspeed and several Flight Director Malfunctions during a go around after a faulty Predictive Windshear Warning.
Narrative: I was hand flying the airplane for landing. At 200 ft AGL on a stabilized approach in VMC; calm winds; and no convective activity nearby. The airplane announced and displayed 'go around wind shear'. Per SOP; I executed go around. While complying with ATC heading and altitude instructions; flap setting 5 was oversped to 225kts for about 30 seconds. The GA (Go Around) button on thrust lever was pushed several times but FMA (Flight Mode Annunciator) would not change from GS and LOC. At 400 ft heading select was called for and pushed. No FMA change. I missed the FLCH (Flight Level Change) call and speed. The FDs (Flight Directors) were switched off and on; the FMA changed and AP (Auto Pilot) was engaged during the overspeed event. The GA procedure was not completed correctly and I was overly focused on the FMA not changing to HDG which distracted me from speed monitoring. After the flaps were up and the after takeoff checklist was completed; The airplane accelerated to about 280kts at 3500 feet for about 20 seconds while climbing from initial Tower directed level off of 2;000 ft to 5;000 ft. ATC made no mention of the situation. The airplane was landed normally with no further issues. At the gate; the issue of the flap 5 overspeed and the PWS (Probably Wind Shear) false alert were logged for maintenance.
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.