 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Md-82 captain experiences loss of his airspeed indication at 100 knots during takeoff and with the first officer flying and the takeoff is continued. After becoming airborne the first officers airspeed also fails and an emergency is declared. The first officer's airspeed returns to normal shortly thereafter and the captain's airspeed indicator is placed on number two CADC and the flight returns to the departure airport.
| Attributes | |
| ACN | 1119554 |
| Time | |
| Date | 201309 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | MD-82 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Air Data Computer |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
I was the pilot monitoring. On takeoff roll; captain's airspeed indicator went to zero at approximately 100 knots. First officer's airspeed agreed with standby airspeed indicator. Takeoff was continued. ATC was advised that we were unable RNAV and were given a heading. At this point the first officer lost his airspeed as well with the standby airspeed consistent with phase of flight. An emergency was declared and ATC was informed we were returning. Shortly after our decision to return; the first officer's airspeed came back and the QRH for CADC failure was accomplished. CADC selector was placed to; 'both on 2'; and indications returned to normal. An overweight landing was accomplished. Landing was at a normal descent rate. Weight at touchdown was approximately 135;500 pounds. Safety responders check aircraft and brakes and the aircraft was taxied back to the gate.
Original NASA ASRS Text
Title: MD-82 Captain experiences loss of his airspeed indication at 100 knots during takeoff and with the First Officer flying and the takeoff is continued. After becoming airborne the First Officers airspeed also fails and an emergency is declared. The First Officer's airspeed returns to normal shortly thereafter and the Captain's airspeed indicator is placed on number two CADC and the flight returns to the departure airport.
Narrative: I was the Pilot Monitoring. On takeoff roll; Captain's airspeed indicator went to zero at approximately 100 knots. First Officer's airspeed agreed with standby airspeed indicator. Takeoff was continued. ATC was advised that we were unable RNAV and were given a heading. At this point the First Officer lost his airspeed as well with the standby airspeed consistent with phase of flight. An emergency was declared and ATC was informed we were returning. Shortly after our decision to return; the First Officer's airspeed came back and the QRH for CADC failure was accomplished. CADC selector was placed to; 'Both on 2'; and indications returned to normal. An overweight landing was accomplished. Landing was at a normal descent rate. Weight at touchdown was approximately 135;500 pounds. Safety responders check aircraft and brakes and the aircraft was taxied back to the gate.
Data retrieved from NASA's ASRS site as of July 2013 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.