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A B757-200 flight crew reported a problem with their squat switch that resulted in multiple failures and the takeoff warning horn sounding. They returned to departure airport.
| Attributes | |
| ACN | 972129 |
| Time | |
| Date | 201109 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Squat Switch |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 16000 Flight Crew Type 5500 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 90 Flight Crew Total 10000 Flight Crew Type 700 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
About FL300 aircraft appeared to shift to ground mode. Auto throttle failure; pitot partial failure; constant takeoff warning horn sounding; flap warning; and pages of status messages. This lasted about 10 minutes. Checklists were of no little or no help. Used captain's emergency authority to pull takeoff warning speaker circuit breakers so we could communicate. [Briefed] in flight crew; no evacuation planned. Amber alert by dispatch. Returned to [departure airport] uneventfully.
Original NASA ASRS Text
Title: A B757-200 flight crew reported a problem with their squat switch that resulted in multiple failures and the takeoff warning horn sounding. They returned to departure airport.
Narrative: About FL300 aircraft appeared to shift to ground mode. Auto throttle failure; pitot partial failure; constant takeoff warning horn sounding; flap warning; and pages of status messages. This lasted about 10 minutes. Checklists were of no little or no help. Used Captain's emergency authority to pull takeoff warning speaker circuit breakers so we could communicate. [Briefed] in flight crew; no evacuation planned. Amber alert by Dispatch. Returned to [departure airport] uneventfully.
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.