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In-flight encounter with severe turbulence. B747 freighter's #2 and #3 engines rollback, #3 flames out. Subsequent relight.
| Attributes | |
| ACN | 316694 |
| Time | |
| Date | 199509 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hkg |
| State Reference | FO |
| Altitude | msl bound lower : 28000 msl bound upper : 41000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747-C/F |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other other |
| Route In Use | enroute : other oceanic enroute : pacific enroute airway : vhhk enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time total : 6000 flight time type : 2000 |
| ASRS Report | 316694 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter other other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : overcame equipment problem flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
While in cruise at FL410 in B747 between (A901) iprop and ignis in IMC, encountered sudden severe turbulence. #2 and #3 engines rolled back to flight idle and shortly thereafter #3 flamed out. #2 engine control took place at FL300, followed by the relight of #3 engine at FL280. The rest of the approach and landing in hong kong was uneventful.
Original NASA ASRS Text
Title: INFLT ENCOUNTER WITH SEVERE TURB. B747 FREIGHTER'S #2 AND #3 ENGS ROLLBACK, #3 FLAMES OUT. SUBSEQUENT RELIGHT.
Narrative: WHILE IN CRUISE AT FL410 IN B747 BTWN (A901) IPROP AND IGNIS IN IMC, ENCOUNTERED SUDDEN SEVERE TURB. #2 AND #3 ENGS ROLLED BACK TO FLT IDLE AND SHORTLY THEREAFTER #3 FLAMED OUT. #2 ENG CTL TOOK PLACE AT FL300, FOLLOWED BY THE RELIGHT OF #3 ENG AT FL280. THE REST OF THE APCH AND LNDG IN HONG KONG WAS UNEVENTFUL.
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.