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An EMB145 first officer reports the aircraft would not unstick at vr until elevator trim was increased beyond weight and balance requirements.
| Attributes | |
| ACN | 666008 |
| Time | |
| Date | 200507 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : grr.airport |
| State Reference | MI |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| 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 |
| ASRS Report | 666008 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
During takeoff; at vr; full aft elevator was applied. Aircraft would not unstick from runway. Additional nose up trim was used and aircraft rotated and climbed. Initial rotation was excessive. Master warning (no takeoff-trim) was heard when additional trim was applied. All speeds and trims were set correctly for takeoff. Aircraft would not fly with normal control forces. Climb out was normal. Continued to destination. Callback conversation with reporter revealed the following information: reporter stated that while climbing and at cruise; the aircraft responded normally. Discussion with maintenance operations control and dispatch led everyone to a most likely conclusion of a misleader aircraft. Reporter's company performed functional flight control check at the destination followed by a test flight. Nothing was discovered.
Original NASA ASRS Text
Title: AN EMB145 FO RPTS THE ACFT WOULD NOT UNSTICK AT VR UNTIL ELEVATOR TRIM WAS INCREASED BEYOND WT AND BAL REQUIREMENTS.
Narrative: DURING TKOF; AT VR; FULL AFT ELEVATOR WAS APPLIED. ACFT WOULD NOT UNSTICK FROM RWY. ADDITIONAL NOSE UP TRIM WAS USED AND ACFT ROTATED AND CLBED. INITIAL ROTATION WAS EXCESSIVE. MASTER WARNING (NO TKOF-TRIM) WAS HEARD WHEN ADDITIONAL TRIM WAS APPLIED. ALL SPDS AND TRIMS WERE SET CORRECTLY FOR TKOF. ACFT WOULD NOT FLY WITH NORMAL CTL FORCES. CLBOUT WAS NORMAL. CONTINUED TO DEST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT WHILE CLBING AND AT CRUISE; THE ACFT RESPONDED NORMALLY. DISCUSSION WITH MAINT OPS CTL AND DISPATCH LED EVERYONE TO A MOST LIKELY CONCLUSION OF A MISLEADER ACFT. RPTR'S COMPANY PERFORMED FUNCTIONAL FLT CTL CHK AT THE DEST FOLLOWED BY A TEST FLT. NOTHING WAS DISCOVERED.
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.