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Broken pressure valve cable in the right engine gives engine failure impression masked by apparently normal thrust indications. Takeoff rejected.
| Attributes | |
| ACN | 739154 |
| Time | |
| Date | 200705 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A321 |
| 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 |
| Qualification | pilot : atp |
| ASRS Report | 739154 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
At about 90 KIAS a loud bang was heard accompanied by a shudder in the airframe. No engine anomalies were noted and apparent loss of thrust did not occur. Suspected initially to be a blown main tire. Consideration was given to the speed of the aircraft and the ample runway remaining and captain initiated a reject at about 100 KIAS. Subsequent investigation revealed a broken pressure valve cable in the #2 engine. Loud bang accompanied by airframe shudder. Symptoms were disguised by no engine indications or attendant loss of thrust. System did not record a momentary overtemp; which did not last long enough to register on engine instruments. Rejected takeoff. Maintenance issue.
Original NASA ASRS Text
Title: BROKEN PRESSURE VALVE CABLE IN THE RIGHT ENGINE GIVES ENGINE FAILURE IMPRESSION MASKED BY APPARENTLY NORMAL THRUST INDICATIONS. TKOF REJECTED.
Narrative: AT ABOUT 90 KIAS A LOUD BANG WAS HEARD ACCOMPANIED BY A SHUDDER IN THE AIRFRAME. NO ENG ANOMALIES WERE NOTED AND APPARENT LOSS OF THRUST DID NOT OCCUR. SUSPECTED INITIALLY TO BE A BLOWN MAIN TIRE. CONSIDERATION WAS GIVEN TO THE SPD OF THE ACFT AND THE AMPLE RWY REMAINING AND CAPT INITIATED A REJECT AT ABOUT 100 KIAS. SUBSEQUENT INVESTIGATION REVEALED A BROKEN PRESSURE VALVE CABLE IN THE #2 ENG. LOUD BANG ACCOMPANIED BY AIRFRAME SHUDDER. SYMPTOMS WERE DISGUISED BY NO ENG INDICATIONS OR ATTENDANT LOSS OF THRUST. SYS DID NOT RECORD A MOMENTARY OVERTEMP; WHICH DID NOT LAST LONG ENOUGH TO REGISTER ON ENG INSTS. REJECTED TKOF. MAINT ISSUE.
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.