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B747 crew had #4 engine roll back to idle thrust. Later in the approach, the engine had to be shut down.
| Attributes | |
| ACN | 604864 |
| Time | |
| Date | 200401 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : nippi |
| State Reference | FO |
| Altitude | msl single value : 38000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : rjtg.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : multi engine pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 2000 |
| ASRS Report | 604864 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : engine instruments other flight crewa other flight crewb other other : 3 |
| Resolutory Action | controller : provided flight assist controller : issued new clearance flight crew : landed as precaution none taken : detected after the fact other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
At FL380 approximately 90 NM east of the fix nippi on 220 degree radial, the #4 engine decreased to idle thrust. We obtained descent clearance to FL360 from tyo radio. We reviewed/performed all abnormal procedures. We contacted dispatch and maintenance control and with their concurrence, continued to nrt. On final approach to runway 16R at nrt, the #4 engine further degraded, so we performed precautionary engine shutdown checklist. Landing and taxi-in were normal. En route and destination WX was excellent.
Original NASA ASRS Text
Title: B747 CREW HAD #4 ENG ROLL BACK TO IDLE THRUST. LATER IN THE APCH, THE ENG HAD TO BE SHUT DOWN.
Narrative: AT FL380 APPROX 90 NM E OF THE FIX NIPPI ON 220 DEG RADIAL, THE #4 ENG DECREASED TO IDLE THRUST. WE OBTAINED DSCNT CLRNC TO FL360 FROM TYO RADIO. WE REVIEWED/PERFORMED ALL ABNORMAL PROCS. WE CONTACTED DISPATCH AND MAINT CTL AND WITH THEIR CONCURRENCE, CONTINUED TO NRT. ON FINAL APCH TO RWY 16R AT NRT, THE #4 ENG FURTHER DEGRADED, SO WE PERFORMED PRECAUTIONARY ENG SHUTDOWN CHKLIST. LNDG AND TAXI-IN WERE NORMAL. ENRTE AND DEST WX WAS EXCELLENT.
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.