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An ATR72-212A rejected takeoff at 100 KTS due to #1 engine stall and loss of power caused by failure of the high pressure turbine blades.
| Attributes | |
| ACN | 408644 |
| Time | |
| Date | 199807 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | ATR 72 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 60 flight time total : 7000 flight time type : 5000 |
| ASRS Report | 408644 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
During takeoff from runway 22L at ord at approximately 100 KIAS, a loud compressor stall was heard from the left side and was followed by the immediate failure of the #1 engine. The takeoff was aborted and the runway cleared. No fire indication was received. I had the #1 flight attendant visually confirm there was no smoke or fire from the #1 engine. The aircraft was returned to the gate and the passenger were deplaned without incident. A subsequent discussion with the maintenance department revealed the apparent cause of the failure was the high pressure turbine wheel shedding all of its blades. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was pwred with P&west PW127 engines and have been very reliable with no problems. The reporter said maintenance advised the reporter the next day that a borescope inspection was made and revealed the high pressure turbine blades had failed.
Original NASA ASRS Text
Title: AN ATR72-212A REJECTED TKOF AT 100 KTS DUE TO #1 ENG STALL AND LOSS OF PWR CAUSED BY FAILURE OF THE HIGH PRESSURE TURBINE BLADES.
Narrative: DURING TKOF FROM RWY 22L AT ORD AT APPROX 100 KIAS, A LOUD COMPRESSOR STALL WAS HEARD FROM THE L SIDE AND WAS FOLLOWED BY THE IMMEDIATE FAILURE OF THE #1 ENG. THE TKOF WAS ABORTED AND THE RWY CLRED. NO FIRE INDICATION WAS RECEIVED. I HAD THE #1 FLT ATTENDANT VISUALLY CONFIRM THERE WAS NO SMOKE OR FIRE FROM THE #1 ENG. THE ACFT WAS RETURNED TO THE GATE AND THE PAX WERE DEPLANED WITHOUT INCIDENT. A SUBSEQUENT DISCUSSION WITH THE MAINT DEPT REVEALED THE APPARENT CAUSE OF THE FAILURE WAS THE HIGH PRESSURE TURBINE WHEEL SHEDDING ALL OF ITS BLADES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS PWRED WITH P&W PW127 ENGS AND HAVE BEEN VERY RELIABLE WITH NO PROBS. THE RPTR SAID MAINT ADVISED THE RPTR THE NEXT DAY THAT A BORESCOPE INSPECTION WAS MADE AND REVEALED THE HIGH PRESSURE TURBINE BLADES HAD FAILED.
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.