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MD11 flight crew experiences malfunction of first officer's and standby airspeed indicators at high speed during the takeoff roll. Switching the first officer's pitot static instruments to air data computer number one in accordance with QRH procedures was successful and flight returned to departure airport. This malfunction also inhibited autothrust and pressurization.
| Attributes | |
| ACN | 958156 |
| Time | |
| Date | 201107 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 65 Flight Crew Total 6500 Flight Crew Type 1709 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Flight Engineer |
| Experience | Flight Crew Last 90 Days 134 Flight Crew Total 7900 Flight Crew Type 6400 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
On takeoff the flight officer's flight instruments became erratic. This was followed by the standby flight instruments becoming erratic. On climb out the first officer's indicated airspeed slowly rolled back and the altitude readout was erroneous. This was followed by multiple other alerts. We declared an emergency and ran the quick reference handbook checklist 'airspeed: lost; suspect; or erratic.' after we determined that the aircraft was safe and light enough for landing we returned and landed uneventfully.
Original NASA ASRS Text
Title: MD11 flight crew experiences malfunction of First Officer's and standby airspeed indicators at high speed during the takeoff roll. Switching the First Officer's pitot static instruments to ADC number one in accordance with QRH procedures was successful and flight returned to departure airport. This malfunction also inhibited autothrust and pressurization.
Narrative: On takeoff the Flight Officer's flight instruments became erratic. This was followed by the standby flight instruments becoming erratic. On climb out the First Officer's indicated airspeed slowly rolled back and the altitude readout was erroneous. This was followed by multiple other alerts. We declared an emergency and ran the Quick Reference Handbook Checklist 'Airspeed: Lost; Suspect; or Erratic.' After we determined that the aircraft was safe and light enough for landing we returned and landed 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.