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Gv flight crew has EICAS warning of impending engine problems. Fadec system shuts down the engine as a precaution. Emergency declared and flight crew diverts.
| Attributes | |
| ACN | 686555 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 43000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream V |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 17000 flight time type : 2100 |
| ASRS Report | 686555 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewb other other : 1 |
| Resolutory Action | flight crew : declared emergency flight crew : landed as precaution flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
In cruise flight at FL430; we experienced an abnormal autothrottle disconnect. We noticed the following events: 6 seconds later an amber crew alert message appeared on the display 'left engine maintenance required.' 12 seconds later; the left engine rolled back. 13 seconds later; the red 'left engine fail' message appeared. We declared an emergency and requested descent. Due to our altitude and mi needed to fly for descent; we requested diversion to ZZZ; and landed on runway 18R without incident. No fire indications were present. We elected not to attempt a relight due to concern for the fadec (eec) health and causing further problems with the engine. Subsequent investigation revealed a latent fault in one fadec channel and a variable stator vane fault in the remaining channel that caused the fadec to shut down the engine. The software on the fadec's on both engines have been upgraded to a later version to eliminate latent faults.
Original NASA ASRS Text
Title: GV FLT CREW HAS EICAS WARNING OF IMPENDING ENG PROBS. FADEC SYS SHUTS DOWN THE ENG AS A PRECAUTION. EMER DECLARED AND FLT CREW DIVERTS.
Narrative: IN CRUISE FLT AT FL430; WE EXPERIENCED AN ABNORMAL AUTOTHROTTLE DISCONNECT. WE NOTICED THE FOLLOWING EVENTS: 6 SECONDS LATER AN AMBER CREW ALERT MESSAGE APPEARED ON THE DISPLAY 'L ENG MAINT REQUIRED.' 12 SECONDS LATER; THE L ENG ROLLED BACK. 13 SECONDS LATER; THE RED 'L ENG FAIL' MESSAGE APPEARED. WE DECLARED AN EMER AND REQUESTED DSCNT. DUE TO OUR ALT AND MI NEEDED TO FLY FOR DSCNT; WE REQUESTED DIVERSION TO ZZZ; AND LANDED ON RWY 18R WITHOUT INCIDENT. NO FIRE INDICATIONS WERE PRESENT. WE ELECTED NOT TO ATTEMPT A RELIGHT DUE TO CONCERN FOR THE FADEC (EEC) HEALTH AND CAUSING FURTHER PROBS WITH THE ENG. SUBSEQUENT INVESTIGATION REVEALED A LATENT FAULT IN ONE FADEC CHANNEL AND A VARIABLE STATOR VANE FAULT IN THE REMAINING CHANNEL THAT CAUSED THE FADEC TO SHUT DOWN THE ENG. THE SOFTWARE ON THE FADEC'S ON BOTH ENGS HAVE BEEN UPGRADED TO A LATER VERSION TO ELIMINATE LATENT FAULTS.
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.