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A B737-400 on flap extension #4 leading edge flap failed to extend properly. Recycled flaps and light went out. Captain reports fatigue caused by 14 hour duty day.
| Attributes | |
| ACN | 711683 |
| Time | |
| Date | 200610 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 100 flight time type : 3500 |
| ASRS Report | 711683 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : #4 le flap indication other flight crewa other flight crewb |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : executed go around |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance Aircraft Chart Or Publication |
| Primary Problem | Aircraft |
Narrative:
Upon flap extension for landing; the #4 leading edge flap failed to properly extend. We went around recycled the flaps; the light went out and we landed without incident. As the PF; my aircraft control was not the best. My altitude deviated while on vectors around for landing as well as while dealing with the incident varied by 200 ft. This I feel was due to my extremely long crew duty day of 14+ hours and the lack of concern for my sleep cycles over the past several months by crew planning and crew scheduling. I'm tired and spent. Better maintenance. Come on; let's spend some money to maintain the planes. Proper staffing so that the pilots on reserve aren't staffing the airline and being utilized for 15 hours a day; 5 days a week.
Original NASA ASRS Text
Title: A B737-400 ON FLAP EXTENSION #4 LEADING EDGE FLAP FAILED TO EXTEND PROPERLY. RECYCLED FLAPS AND LIGHT WENT OUT. CAPT RPTS FATIGUE CAUSED BY 14 HR DUTY DAY.
Narrative: UPON FLAP EXTENSION FOR LNDG; THE #4 LEADING EDGE FLAP FAILED TO PROPERLY EXTEND. WE WENT AROUND RECYCLED THE FLAPS; THE LIGHT WENT OUT AND WE LANDED WITHOUT INCIDENT. AS THE PF; MY ACFT CTL WAS NOT THE BEST. MY ALT DEVIATED WHILE ON VECTORS AROUND FOR LNDG AS WELL AS WHILE DEALING WITH THE INCIDENT VARIED BY 200 FT. THIS I FEEL WAS DUE TO MY EXTREMELY LONG CREW DUTY DAY OF 14+ HRS AND THE LACK OF CONCERN FOR MY SLEEP CYCLES OVER THE PAST SEVERAL MONTHS BY CREW PLANNING AND CREW SCHEDULING. I'M TIRED AND SPENT. BETTER MAINT. COME ON; LET'S SPEND SOME MONEY TO MAINTAIN THE PLANES. PROPER STAFFING SO THAT THE PLTS ON RESERVE AREN'T STAFFING THE AIRLINE AND BEING UTILIZED FOR 15 HRS A DAY; 5 DAYS A WEEK.
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.