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Air carrier flight crew uses discretion in continuing takeoff in an advanced cockpit widebody transport when right engine accelerated more slowly than left, even though company procedure suggest a takeoff abort.
| Attributes | |
| ACN | 127599 |
| Time | |
| Date | 198911 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 20000 flight time type : 5300 |
| ASRS Report | 127599 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 5000 |
| ASRS Report | 127597 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
During takeoff roll, right engine accelerated slower than left, but since aircraft was light, temperature cool and runway long, aircraft accelerated very rapidly. By the time I scanned all engine instruments and saw fuel flow on right engine low (8800# on right, a normal 13,000# on left) and pushed right throttle to a maximum position, the airspeed was indicating 100+ KTS and increasing rapidly, I decided not to abort takeoff even though manual 'suggests' aborting when standard and maximum powers aren't available.
Original NASA ASRS Text
Title: ACR FLT CREW USES DISCRETION IN CONTINUING TKOF IN AN ADVANCED COCKPIT WDB WHEN RIGHT ENGINE ACCELERATED MORE SLOWLY THAN LEFT, EVEN THOUGH COMPANY PROC SUGGEST A TKOF ABORT.
Narrative: DURING TKOF ROLL, RIGHT ENGINE ACCELERATED SLOWER THAN LEFT, BUT SINCE ACFT WAS LIGHT, TEMPERATURE COOL AND RWY LONG, ACFT ACCELERATED VERY RAPIDLY. BY THE TIME I SCANNED ALL ENGINE INSTRUMENTS AND SAW FUEL FLOW ON RIGHT ENGINE LOW (8800# ON RIGHT, A NORMAL 13,000# ON LEFT) AND PUSHED RIGHT THROTTLE TO A MAX POSITION, THE AIRSPEED WAS INDICATING 100+ KTS AND INCREASING RAPIDLY, I DECIDED NOT TO ABORT TKOF EVEN THOUGH MANUAL 'SUGGESTS' ABORTING WHEN STANDARD AND MAX POWERS AREN'T AVAILABLE.
Data retrieved from NASA's ASRS site as of August 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.