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B757-200 captain reports excessive elevator inputs to rotate for takeoff. Suspects incorrect stabilizer trim setting.
| Attributes | |
| ACN | 763876 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 170 flight time total : 20600 flight time type : 6200 |
| ASRS Report | 763876 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure non adherence : company policies |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Company Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Takeoff on runway 10L sfo was normal until reaching rotation. I was the PF. On rotation; the pull required to rotate was extremely heavy. The pull required was at least twice that normally required for the B757. The trim was properly set at 3.9 as per the final weight manifest and the speed were correct for the takeoff weight. I was very near to rejecting the takeoff because the aircraft was not responding as normal. I pull much harder than normal to get the aircraft to rotate. Once at cruise altitude; I sent an ACARS to load planning for them to check to see if the aircraft had been loading correctly; and to check that their computations were correct. They replied that they were. At that point I also did a report for maintenance to check the aircraft. There was no previous log history of this type. I also flew this aircraft approximately 3 weeks ago -- at that time it was normal. I am quite concerned that the correct load information from the station may not have not been sent to load planning. I did debrief maintenance at destination and the outbound first officer.
Original NASA ASRS Text
Title: B757-200 CAPTAIN REPORTS EXCESSIVE ELEVATOR INPUTS TO ROTATE FOR TKOF. SUSPECTS INCORRECT STABILIZER TRIM SETTING.
Narrative: TKOF ON RWY 10L SFO WAS NORMAL UNTIL REACHING ROTATION. I WAS THE PF. ON ROTATION; THE PULL REQUIRED TO ROTATE WAS EXTREMELY HVY. THE PULL REQUIRED WAS AT LEAST TWICE THAT NORMALLY REQUIRED FOR THE B757. THE TRIM WAS PROPERLY SET AT 3.9 AS PER THE FINAL WT MANIFEST AND THE SPD WERE CORRECT FOR THE TKOF WT. I WAS VERY NEAR TO REJECTING THE TKOF BECAUSE THE ACFT WAS NOT RESPONDING AS NORMAL. I PULL MUCH HARDER THAN NORMAL TO GET THE ACFT TO ROTATE. ONCE AT CRUISE ALT; I SENT AN ACARS TO LOAD PLANNING FOR THEM TO CHK TO SEE IF THE ACFT HAD BEEN LOADING CORRECTLY; AND TO CHK THAT THEIR COMPUTATIONS WERE CORRECT. THEY REPLIED THAT THEY WERE. AT THAT POINT I ALSO DID A RPT FOR MAINT TO CHK THE ACFT. THERE WAS NO PREVIOUS LOG HISTORY OF THIS TYPE. I ALSO FLEW THIS ACFT APPROX 3 WKS AGO -- AT THAT TIME IT WAS NORMAL. I AM QUITE CONCERNED THAT THE CORRECT LOAD INFO FROM THE STATION MAY NOT HAVE NOT BEEN SENT TO LOAD PLANNING. I DID DEBRIEF MAINT AT DEST AND THE OUTBOUND FO.
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.