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B737 flight crew reported failure of nose down electric trim during flap retraction after takeoff. Aircraft had a history of trim problems and had just come from the maintenance hanger.
| Attributes | |
| ACN | 842496 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb Initial Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Elevator Trim System |
| Person 1 | |
| Function | Pilot Flying Captain |
| Experience | Flight Crew Last 90 Days 230 Flight Crew Total 12000 Flight Crew Type 5500 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 11700 Flight Crew Type 2000 |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe |
Narrative:
After takeoff climbing through 1500 ft MSL and accelerating to 210 KTS; captain's and first officer's nose down main electric trim switches did not work. Nose up trim was ok but did not need nose up trim at that point. We leveled at 6000 ft while completing the inoperative stabilizer trim irreg procedure; no autopilot available. I declared an emergency with ATC; notified dispatch and returned to our departure airport for an uneventful flaps 15 landing. The aircraft had just come from the hangar after maintenance worked on the main electric trim overnight. Although there was much history with that issue on that airplane; there was no apparent reason to believe that the issue had not been corrected. First officer and flight attendants performed flawlessly eventhough no cabin advisory was given.
Original NASA ASRS Text
Title: B737 flight crew reported failure of nose down electric trim during flap retraction after takeoff. Aircraft had a history of trim problems and had just come from the maintenance hanger.
Narrative: After takeoff climbing through 1500 FT MSL and accelerating to 210 KTS; Captain's and First Officer's nose down main electric trim switches did not work. Nose up trim was OK but did not need nose up trim at that point. We leveled at 6000 FT while completing the INOP STAB TRIM IRREG procedure; no autopilot available. I declared an emergency with ATC; notified dispatch and returned to our departure airport for an uneventful Flaps 15 landing. The aircraft had just come from the hangar after maintenance worked on the main electric trim overnight. Although there was much history with that issue on that airplane; there was no apparent reason to believe that the issue had not been corrected. First Officer and flight attendants performed flawlessly eventhough no cabin advisory was given.
Data retrieved from NASA's ASRS site as of April 2012 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.