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A B737 crew distracted while troubleshooting a popped engine cowl anti-ice circuit breaker and a long preflight de-ice failed to turn on pitot heat. Airspeed fluctuations and stall warning occurred after takeoff until heat turned on.
| Attributes | |
| ACN | 765691 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : slc.airport |
| State Reference | UT |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Snow |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : multi engine |
| ASRS Report | 765691 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 12000 flight time type : 8000 |
| ASRS Report | 765695 |
| Events | |
| Anomaly | non adherence : company policies non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem flight crew : exited adverse environment flight crew : became reoriented |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While starting the left engine; the cowl valve open light did not illuminate when turning on the #1 engine anti-ice. The flight crew re-bulbed the light with no effect. Crew found a popped circuit breaker (engine #1 cowl anti-ice) and reset it. System then worked normally. Stopped to deice. Deice took longer than normal. On taxi-out the flight received a runway change which increased taxi time. The aircraft was approaching minimum fuel for takeoff when finally cleared for takeoff. On climb out the airspeed began to fluctuate with stick shaker activation and windshear warnings. All other instruments indicated a normal climb out. A quick look around the cockpit revealed that the probe heat had been left off. It was turned on and the flight proceeded normally. The flight crew believes that it became distraction by the circuit breaker issue; deicing; runway change and minimum fuel for takeoff.
Original NASA ASRS Text
Title: A B737 CREW DISTRACTED WHILE TROUBLESHOOTING A POPPED ENG COWL ANTI-ICE CIRCUIT BREAKER AND A LONG PREFLT DE-ICE FAILED TO TURN ON PITOT HEAT. AIRSPEED FLUCTUATIONS AND STALL WARNING OCCURRED AFTER TKOF UNTIL HEAT TURNED ON.
Narrative: WHILE STARTING THE L ENG; THE COWL VALVE OPEN LIGHT DID NOT ILLUMINATE WHEN TURNING ON THE #1 ENG ANTI-ICE. THE FLT CREW RE-BULBED THE LIGHT WITH NO EFFECT. CREW FOUND A POPPED CIRCUIT BREAKER (ENG #1 COWL ANTI-ICE) AND RESET IT. SYS THEN WORKED NORMALLY. STOPPED TO DEICE. DEICE TOOK LONGER THAN NORMAL. ON TAXI-OUT THE FLT RECEIVED A RWY CHANGE WHICH INCREASED TAXI TIME. THE ACFT WAS APCHING MINIMUM FUEL FOR TKOF WHEN FINALLY CLRED FOR TKOF. ON CLBOUT THE AIRSPD BEGAN TO FLUCTUATE WITH STICK SHAKER ACTIVATION AND WINDSHEAR WARNINGS. ALL OTHER INSTS INDICATED A NORMAL CLBOUT. A QUICK LOOK AROUND THE COCKPIT REVEALED THAT THE PROBE HEAT HAD BEEN LEFT OFF. IT WAS TURNED ON AND THE FLT PROCEEDED NORMALLY. THE FLT CREW BELIEVES THAT IT BECAME DISTR BY THE CIRCUIT BREAKER ISSUE; DEICING; RWY CHANGE AND MINIMUM FUEL FOR TKOF.
Data retrieved from NASA's ASRS site as of January 2009 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.