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A B747-400's number three engine was found damaged at the destination from a unknown cause after it was inspected and appeared normal during preflight.
| Attributes | |
| ACN | 946524 |
| Time | |
| Date | 201105 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Experience | Flight Crew Last 90 Days 163 Flight Crew Total 11000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
After parking; a company mechanic came up to the cockpit to inform us that there was visible damage to the number 3 engine. The captain and I proceeded outside and observed multiple obvious spots of damage to several fan blades as well as damage to the acoustical liner in multiple locations. I had performed the pre-flight inspection prior to departure and noted no discrepancies. During our climb out; a flight attendant had called the cockpit to report a vibration near door 2R. The 'drs' synoptic confirmed all the doors were closed. I noted no vibrations in the cockpit at all. During the cruise portion of the flight while dealing with a complaint that the conditioned air was too warm in one zone; the captain pulled up a maintenance page. This showed a message for an engine vibration or an engine vibration fault. The captain sent a maintenance message noting this as well as the vibration felt near door 2R.
Original NASA ASRS Text
Title: A B747-400's number three engine was found damaged at the destination from a unknown cause after it was inspected and appeared normal during preflight.
Narrative: After parking; a Company Mechanic came up to the cockpit to inform us that there was visible damage to the number 3 engine. The Captain and I proceeded outside and observed multiple obvious spots of damage to several fan blades as well as damage to the acoustical liner in multiple locations. I had performed the pre-flight inspection prior to departure and noted no discrepancies. During our climb out; a flight attendant had called the cockpit to report a vibration near door 2R. The 'DRS' synoptic confirmed all the doors were closed. I noted no vibrations in the cockpit at all. During the cruise portion of the flight while dealing with a complaint that the conditioned air was too warm in one zone; the Captain pulled up a maintenance page. This showed a message for an engine vibration or an engine vibration fault. The Captain sent a maintenance message noting this as well as the vibration felt near door 2R.
Data retrieved from NASA's ASRS site as of April 2012 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.