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MD10 has thrust roll back and lack of thrust lever authority on one engine during initial climb after take off.
| Attributes | |
| ACN | 536858 |
| Time | |
| Date | 200201 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : sea.vortac |
| State Reference | WA |
| Altitude | msl single value : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Rain |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon tower : ord.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 120 flight time total : 4000 flight time type : 120 |
| ASRS Report | 536858 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer oversight : pic |
| Qualification | pilot : instrument pilot : multi engine pilot : atp pilot : cfi pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 74 flight time total : 8000 flight time type : 74 |
| ASRS Report | 536856 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | aircraft equipment other aircraft equipment : engine n1 indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem |
| Factors | |
| Maintenance | performance deficiency : fault isolation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Event happened to another crew (same airframe) 2 days prior. On takeoff (climb out) at approximately 2500 ft, #1 engine power rolled back to 70% N1. Throttle position had no effect no increasing power, but would reduce power. Dumped fuel, declared emergency, on short final crew noted #1 fuel lever at midway position, pushed up and landed. Maintenance performed found over tight or strong release spring. High power run and took plane with no further abnormalities. Supplemental information from acn 536856: crew put #1 fuel lever to full up position. #1 N1 lagged remaining engines by 5%-8%. Crew had ensured fuel levers locked in position on start. Maintenance readjusted #1 fuel lever cable and noted a weak locking spring on fuel lever detent. Callback conversation with reporter revealed the following information: the reporter could not recall the maintenance completed after the incident of the day before. Even though during the high power run after maintenance completed their work and the subsequent uneventful flight the crew was told that the aircraft was going to go in for further maintenance investigation.
Original NASA ASRS Text
Title: MD10 HAS THRUST ROLL BACK AND LACK OF THRUST LEVER AUTHORITY ON ONE ENGINE DURING INITIAL CLIMB AFTER TAKE OFF.
Narrative: EVENT HAPPENED TO ANOTHER CREW (SAME AIRFRAME) 2 DAYS PRIOR. ON TKOF (CLBOUT) AT APPROX 2500 FT, #1 ENG PWR ROLLED BACK TO 70% N1. THROTTLE POS HAD NO EFFECT NO INCREASING PWR, BUT WOULD REDUCE PWR. DUMPED FUEL, DECLARED EMER, ON SHORT FINAL CREW NOTED #1 FUEL LEVER AT MIDWAY POS, PUSHED UP AND LANDED. MAINT PERFORMED FOUND OVER TIGHT OR STRONG RELEASE SPRING. HIGH PWR RUN AND TOOK PLANE WITH NO FURTHER ABNORMALITIES. SUPPLEMENTAL INFO FROM ACN 536856: CREW PUT #1 FUEL LEVER TO FULL UP POS. #1 N1 LAGGED REMAINING ENGS BY 5%-8%. CREW HAD ENSURED FUEL LEVERS LOCKED IN POS ON START. MAINT READJUSTED #1 FUEL LEVER CABLE AND NOTED A WEAK LOCKING SPRING ON FUEL LEVER DETENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR COULD NOT RECALL THE MAINT COMPLETED AFTER THE INCIDENT OF THE DAY BEFORE. EVEN THOUGH DURING THE HIGH PWR RUN AFTER MAINT COMPLETED THEIR WORK AND THE SUBSEQUENT UNEVENTFUL FLT THE CREW WAS TOLD THAT THE ACFT WAS GOING TO GO IN FOR FURTHER MAINT INVESTIGATION.
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.