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Aircraft equipment problem malfunction causes air carrier large transport to exceed flap extended speed on approach.
| Attributes | |
| ACN | 242249 |
| Time | |
| Date | 199305 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 3700 msl bound upper : 3700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 190 flight time total : 9800 flight time type : 450 |
| ASRS Report | 242249 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While turning right base to final on runway 35R at dfw airport, the automatic throttles malfunctioned, advancing to climb power. Our attention was diverted for 2-3 seconds while we looked for a TA we received on the TCASII. When I looked back into the cockpit I realized that the automatic throttles had advanced to climb power during this descending right turn towards the runway and the airspeed had increased 20-30 KTS over the 15 degree flap extension speed. I immediately and simultaneously disconnected the automatic throttles, brought them to idle, raised the nose, and extended the speed brakes. We slowed rapidly to an appropriate speed and made a normal landing. The aircraft was taken OTS. Maintenance inspected the aircraft and found no damage. We had been flying for over 8 hours at this point. The TA diverted our attention at a very critical time when we would normally have been observing aircraft system and performance as we approached to land.
Original NASA ASRS Text
Title: ACFT EQUIP PROB MALFUNCTION CAUSES ACR LGT TO EXCEED FLAP EXTENDED SPD ON APCH.
Narrative: WHILE TURNING R BASE TO FINAL ON RWY 35R AT DFW ARPT, THE AUTO THROTTLES MALFUNCTIONED, ADVANCING TO CLB PWR. OUR ATTN WAS DIVERTED FOR 2-3 SECONDS WHILE WE LOOKED FOR A TA WE RECEIVED ON THE TCASII. WHEN I LOOKED BACK INTO THE COCKPIT I REALIZED THAT THE AUTO THROTTLES HAD ADVANCED TO CLB PWR DURING THIS DSNDING R TURN TOWARDS THE RWY AND THE AIRSPD HAD INCREASED 20-30 KTS OVER THE 15 DEG FLAP EXTENSION SPD. I IMMEDIATELY AND SIMULTANEOUSLY DISCONNECTED THE AUTO THROTTLES, BROUGHT THEM TO IDLE, RAISED THE NOSE, AND EXTENDED THE SPD BRAKES. WE SLOWED RAPIDLY TO AN APPROPRIATE SPD AND MADE A NORMAL LNDG. THE ACFT WAS TAKEN OTS. MAINT INSPECTED THE ACFT AND FOUND NO DAMAGE. WE HAD BEEN FLYING FOR OVER 8 HRS AT THIS POINT. THE TA DIVERTED OUR ATTN AT A VERY CRITICAL TIME WHEN WE WOULD NORMALLY HAVE BEEN OBSERVING ACFT SYS AND PERFORMANCE AS WE APCHED TO LAND.
Data retrieved from NASA's ASRS site as of July 2007 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.