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B737-200 flight crew fails to deploy flaps for takeoff. After receiving takeoff warning horn, the aircraft is allowed to continue through 70 KTS while flaps were set to takeoff position and takeoff was continued.
| Attributes | |
| ACN | 352781 |
| Time | |
| Date | 199611 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dal |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 11800 flight time type : 6200 |
| ASRS Report | 352781 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 8800 |
| ASRS Report | 352053 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The takeoff flap setting was not selected on the before takeoff checklist. The item was apparently missed due to distrs on taxi out with hold short instructions and other instructions from ground control. The problem was discovered when the throttles were advanced for takeoff and the takeoff warning horn sounded. The flaps were immediately selected to 1 degree and the horn silenced in approximately 3 seconds. Since 1 degree was the planned takeoff flap setting and the aircraft was below 70 KTS when the horn silenced and the flaps were set, the takeoff was continued. The runway was over 13000 ft long. I think a test of the takeoff warning system should be included on the before takeoff checklist. This would be an extra xchk of the flap position to help avoid this problem in the future. I believe a contributing factor in addition to the busy ground frequency was fatigue of the captain who had worked 7 of the previous 8 days and this was the final leg of the trip. The first officer had also discussed some personal problems that may have distraction him. Supplemental information from acn 353053: noted flap lever not in 1 degree detent but out of up (0 degree) detent.
Original NASA ASRS Text
Title: B737-200 FLC FAILS TO DEPLOY FLAPS FOR TKOF. AFTER RECEIVING TKOF WARNING HORN, THE ACFT IS ALLOWED TO CONTINUE THROUGH 70 KTS WHILE FLAPS WERE SET TO TKOF POS AND TKOF WAS CONTINUED.
Narrative: THE TKOF FLAP SETTING WAS NOT SELECTED ON THE BEFORE TKOF CHKLIST. THE ITEM WAS APPARENTLY MISSED DUE TO DISTRS ON TAXI OUT WITH HOLD SHORT INSTRUCTIONS AND OTHER INSTRUCTIONS FROM GND CTL. THE PROB WAS DISCOVERED WHEN THE THROTTLES WERE ADVANCED FOR TKOF AND THE TKOF WARNING HORN SOUNDED. THE FLAPS WERE IMMEDIATELY SELECTED TO 1 DEG AND THE HORN SILENCED IN APPROX 3 SECONDS. SINCE 1 DEG WAS THE PLANNED TKOF FLAP SETTING AND THE ACFT WAS BELOW 70 KTS WHEN THE HORN SILENCED AND THE FLAPS WERE SET, THE TKOF WAS CONTINUED. THE RWY WAS OVER 13000 FT LONG. I THINK A TEST OF THE TKOF WARNING SYS SHOULD BE INCLUDED ON THE BEFORE TKOF CHKLIST. THIS WOULD BE AN EXTRA XCHK OF THE FLAP POS TO HELP AVOID THIS PROB IN THE FUTURE. I BELIEVE A CONTRIBUTING FACTOR IN ADDITION TO THE BUSY GND FREQ WAS FATIGUE OF THE CAPT WHO HAD WORKED 7 OF THE PREVIOUS 8 DAYS AND THIS WAS THE FINAL LEG OF THE TRIP. THE FO HAD ALSO DISCUSSED SOME PERSONAL PROBS THAT MAY HAVE DISTR HIM. SUPPLEMENTAL INFO FROM ACN 353053: NOTED FLAP LEVER NOT IN 1 DEG DETENT BUT OUT OF UP (0 DEG) DETENT.
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.