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A B757 first officer reported an engine rollback during the takeoff roll at ord, which resulted in an abort.
| Attributes | |
| ACN | 586426 |
| Time | |
| Date | 200305 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Dawn |
| 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 : first officer |
| ASRS Report | 586426 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Cleared for takeoff runway 32L at ord. Captain was flying. Called for autothrottle armed and engaged the EPR. Planned EPR was 1.61. Both engines advanced normally to 1.61 and then the left engine rolled back to 1.5 EPR and then surged back to 1.61 then back to 1.5 and back to 1.60. Captain aborted at 85 KTS and automatic brakes engaged. Exited the runway and looked at the brake cooling chart. Determined safe to return to the gate.
Original NASA ASRS Text
Title: A B757 FO RPTED AN ENG ROLLBACK DURING THE TKOF ROLL AT ORD, WHICH RESULTED IN AN ABORT.
Narrative: CLRED FOR TKOF RWY 32L AT ORD. CAPT WAS FLYING. CALLED FOR AUTOTHROTTLE ARMED AND ENGAGED THE EPR. PLANNED EPR WAS 1.61. BOTH ENGS ADVANCED NORMALLY TO 1.61 AND THEN THE L ENG ROLLED BACK TO 1.5 EPR AND THEN SURGED BACK TO 1.61 THEN BACK TO 1.5 AND BACK TO 1.60. CAPT ABORTED AT 85 KTS AND AUTO BRAKES ENGAGED. EXITED THE RWY AND LOOKED AT THE BRAKE COOLING CHART. DETERMINED SAFE TO RETURN TO THE GATE.
Data retrieved from NASA's ASRS site as of July 2007 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.