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A DC10 flight crew were distracted and the airspeed dropped near the onset of a stall flight condition climbing from lhr.
| Attributes | |
| ACN | 440843 |
| Time | |
| Date | 199906 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : gibso |
| State Reference | FO |
| Altitude | msl bound lower : 21000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : egtt.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 14600 flight time type : 4200 |
| ASRS Report | 440843 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | non adherence : published procedure non adherence : company policies other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overrode automation |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were climbing to FL310. Approaching gibso intersection on ur-8, london control stated that we were supposed to be above FL240 over gibso, we were currently at FL210. At this time I responded that I could increase rate of climb slightly. My intention was to increase vertical speed while bleeding off airspeed down to around 280-290 KTS. We were then reclred. As I was looking at the chart and proceeded to start to reprogram INS. All of this time the first officer and so were getting oceanic clearance and were totally out of loop. As I was reprogramming INS there was a slight airframe vibration. I looked at instruments (flight) and saw that the airspeed had decayed to about 230 KTS. I gently lowered nose, increased thrust slightly to maximum control thrust. I lowered nose to start gradual descent to recover airspeed. Allowed speed to increase to normal climb and resumed climb. Continued to reprogram INS and proceeded without further incident. I violated my own #1 rule during this incident 'fly the airplane.
Original NASA ASRS Text
Title: A DC10 FLC WERE DISTRACTED AND THE AIRSPD DROPPED NEAR THE ONSET OF A STALL FLT CONDITION CLBING FROM LHR.
Narrative: WE WERE CLBING TO FL310. APCHING GIBSO INTXN ON UR-8, LONDON CTL STATED THAT WE WERE SUPPOSED TO BE ABOVE FL240 OVER GIBSO, WE WERE CURRENTLY AT FL210. AT THIS TIME I RESPONDED THAT I COULD INCREASE RATE OF CLB SLIGHTLY. MY INTENTION WAS TO INCREASE VERT SPD WHILE BLEEDING OFF AIRSPD DOWN TO AROUND 280-290 KTS. WE WERE THEN RECLRED. AS I WAS LOOKING AT THE CHART AND PROCEEDED TO START TO REPROGRAM INS. ALL OF THIS TIME THE FO AND SO WERE GETTING OCEANIC CLRNC AND WERE TOTALLY OUT OF LOOP. AS I WAS REPROGRAMMING INS THERE WAS A SLIGHT AIRFRAME VIBRATION. I LOOKED AT INSTS (FLT) AND SAW THAT THE AIRSPD HAD DECAYED TO ABOUT 230 KTS. I GENTLY LOWERED NOSE, INCREASED THRUST SLIGHTLY TO MAX CTL THRUST. I LOWERED NOSE TO START GRADUAL DSCNT TO RECOVER AIRSPD. ALLOWED SPD TO INCREASE TO NORMAL CLB AND RESUMED CLB. CONTINUED TO REPROGRAM INS AND PROCEEDED WITHOUT FURTHER INCIDENT. I VIOLATED MY OWN #1 RULE DURING THIS INCIDENT 'FLY THE AIRPLANE.
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.