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B777 flight crew reports being dispatched with an MEL restricting airspeed to 270 KIAS or mach .82. At FL291 270 knots is close to clean maneuver speed and deemed too low for flight in turbulent air.
| Attributes | |
| ACN | 1283118 |
| Time | |
| Date | 201507 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZBPE.ARTCC |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Relief Pilot Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 210 Flight Crew Total 15000 Flight Crew Type 1000 |
| Person 2 | |
| Function | First Officer Relief Pilot Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 182 Flight Crew Total 8832 Flight Crew Type 4847 |
| Events | |
| Anomaly | Deviation - Procedural MEL Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
Invalid dispatch with MEL 3232D with a weight of 620;000#. MEL called for a max of 270 kts/M.82. Fpf planned for M.82 but not 270 kts. Approaching cruise altitude of 8900 meters or FL291 and deviating around thunderstorms; we were unable to maintain 270 kts in turbulence and keep 15 kts above stall buffet.
Original NASA ASRS Text
Title: B777 flight crew reports being dispatched with an MEL restricting airspeed to 270 KIAS or Mach .82. At FL291 270 knots is close to clean maneuver speed and deemed too low for flight in turbulent air.
Narrative: Invalid dispatch with MEL 3232D with a weight of 620;000#. MEL called for a max of 270 kts/M.82. FPF planned for M.82 but not 270 kts. Approaching cruise altitude of 8900 meters or FL291 and deviating around thunderstorms; we were unable to maintain 270 kts in turbulence and keep 15 kts above stall buffet.
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.