 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
The flight crew of a boeing 777 reported that an engine regularly exceeds the maximum vibration limits.
| Attributes | |
| ACN | 1449217 |
| Time | |
| Date | 201705 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Engine Vibration Indication |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
An open item; deferred; in the maintenance log for aircraft X is that the #2 engine regularly exceeds the maximum limit of 4.0 and that [the air carrier] has been given a variance by rolls royce allowing this as ok. They did not say that when it gets to 4.5 or 5.0 then get worried. It seems to imply that the correct procedure is to wait until the engine fails or falls off. In other words; there is no training or even a suggested substitute procedure. This seems to put the pilot's license in jeopardy; as well as compromising the safety buffer margin that our passengers normally have. I was told that this engine is low time at 16;500 hours and therefore should not be having this problem; implying that is a good reason for ignoring the problem. I was told they have done all the investigation they can; including boroscope; except remove the engine for a tear down inspection. This seems to say they currently have little or no idea what the real problem is. I was told they just don't want to remove the engine yet.we have our procedures & limits for safety guidance. When we start ignoring them; sooner or later injury or death will follow. Yes this is a rare occurrence; but this engine has reached lemon status. Take the engine off & replace it with one that works.
Original NASA ASRS Text
Title: The flight crew of a Boeing 777 reported that an engine regularly exceeds the maximum vibration limits.
Narrative: An open item; deferred; in the maintenance log for Aircraft X is that the #2 engine regularly exceeds the maximum limit of 4.0 and that [the Air Carrier] has been given a variance by Rolls Royce allowing this as ok. They did not say that when it gets to 4.5 or 5.0 then get worried. It seems to imply that the correct procedure is to wait until the engine fails or falls off. In other words; there is no training or even a suggested substitute procedure. This seems to put the pilot's license in jeopardy; as well as compromising the safety buffer margin that our passengers normally have. I was told that this engine is low time at 16;500 hours and therefore should not be having this problem; implying that is a good reason for ignoring the problem. I was told they have done all the investigation they can; including Boroscope; except remove the engine for a tear down inspection. This seems to say they currently have little or no idea what the real problem is. I was told they just don't want to remove the engine yet.We have our procedures & limits for safety guidance. When we start ignoring them; sooner or later injury or death will follow. Yes this is a rare occurrence; but this engine has reached lemon status. Take the engine off & replace it with one that works.
Data retrieved from NASA's ASRS site 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.