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A B747-400 captain found the stabilizer trim out of the green band in flight and was told by load planning that only the computer knew the acceptable limit.
| Attributes | |
| ACN | 923654 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Horizontal Stabilizer Trim |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 18000 Flight Crew Type 5000 |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance |
Narrative:
After engine start we got a message from load planning telling us to block rows 60-61 because we were tail heavy. We did so and took off. After takeoff I noticed that the stab was outside of the green band (forward). I checked the limits section of the flight manual and found that our takeoff cg (28.3% mac) was outside of the flight manual limit of 26.9% (565;000 pounds). I satcom'ed dispatch and load planning and asked what was our mac limit. Load planning could not say; stating that the 'computer does all that'. Shouldn't load planning know what the mac limits are?
Original NASA ASRS Text
Title: A B747-400 Captain found the stabilizer trim out of the green band in flight and was told by Load Planning that only the computer knew the acceptable limit.
Narrative: After engine start we got a message from Load Planning telling us to block rows 60-61 because we were tail heavy. We did so and took off. After takeoff I noticed that the stab was outside of the green band (forward). I checked the limits section of the Flight Manual and found that our takeoff CG (28.3% MAC) was outside of the Flight Manual limit of 26.9% (565;000 LBS). I SATCOM'ed Dispatch and Load Planning and asked what was our MAC limit. Load Planning could not say; stating that the 'computer does all that'. Shouldn't Load Planning know what the MAC limits are?
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.